The Kynix Components

The STM32F103RCT6 is a high density performance line, ARM Cortex-M3 32bit microcontroller in 64 pin LQFP package.CatalogProduct OverviewCAD ModelsProduct PinoutSTM32F103RCT6 FeaturesSTM32F103RCT6 BenefitsSTM32F103RCT6 Product AttributesSTM32F103RCT6 ApplicationsSimilar PartsUsing WarningsFAQProduct OverviewThe STM32F103RCT6 is a high density performance line, ARM Cortex-M3 32bit microcontroller in 64 pin LQFP package. It incorporates high performance RISC core with 72MHz operating frequency, high speed embedded memories, extensive range of enhanced I/Os and peripherals connected to two APB buses. The STM32F103RCT6 features 12bit ADC, timers, PWM timer, standard and advanced communication interfaces. A comprehensive set of power saving mode allows design of low power applications.CAD ModelsSTM32F103RCT6 Symbol STM32F103RCT6 Footprint STM32F103RCT6 3D ModelProduct PinoutLQFP144 Pinout LQFP100 Pinout LQFP64 PinoutSTM32F103RCT6 Features• Operating voltage range from 2V to 3.6V• 256Kbytes of flash memory• 48Kbytes of SRAM• CRC calculation unit, 96bit unique ID• Three 12bit, 1µs A/D converter (up to 16 channels) and two 12bit DAC 92 channel• Four general purpose, two advanced control and two basic timers• 51 fast I/O ports• Serial wire debug (SWD) and JTAG interfaces• Three SPI, two I2C, five USART, one USB, one SDIO and one CAN interfaces• Ambient operating temperature range from -40°C to 85°CSTM32F103RCT6 Benefits• Excellent real-time behaviour• Oustanding power efficiency• Superior and innovative peripherals• Maximum integration• Cross family pin-to-pin, peripheral and software compatibilitySTM32F103RCT6 Product AttributesCase/PackageLQFPNumber of Pins64Ambient Temperature Range High85 °CCore ArchitectureARMData Bus Width32 bDensity2 MbFlash Memory Size256 kBFrequency72 MHzInterfaceCAN, I2C, I2S, IrDA, LIN, SPI, USART, USBMax Frequency72 MHzMax Junction Temperature (Tj)125 °CMax Operating Temperature85 °CMax Power Dissipation444 mWMax Supply Voltage3.6 VMemory Size256 kBMemory TypeFLASHMin Operating Temperature-40 °CMin Supply Voltage2 VNominal Supply Current1.9 µANumber of A/D Converters3Number of ADC Channels16Number of Bits32Number of D/A Converters2Number of I2C Channels2Number of I/Os51Number of Programmable I/O51Number of PWM Channels16Number of SPI Channels3Number of Timers/Counters8Number of UART Channels2Number of USART Channels3Number of USB Channels1Oscillator TypeInternalPeripheralsDMA, I2C, POR, PWM, Temp Sensor, WDTRAM Size48 kBSchedule B8542310000TerminationSMD/SMTWatchdog TimerYesHeight1.45 mmLength10 mmWidth10.2 mmLead FreeLead FreeRadiation HardeningNoREACH SVHCNo SVHCRoHSCompliantSTM32F103RCT6 Applications• Embedded Design & Development• Motor Drive & Control• Medical, Industrial• Portable Devices• Wireless, Imaging, Video & Vision, • Consumer Electronics, AutomotiveSimilar PartsSTM32F107RCT6, STM32F105RCT6, STM32F105RCT7, MK20D256VLH7Using WarningsMarket demand for this product has caused an extension in leadtimes. Delivery dates may fluctuate. Product exempt from discounts.FAQWhat package does the STM32F103RCT6 come with?64 pin LQFP What is the temperature range of STM32F103RCT6?–40 to +105 °C What is the power supply of STM32F103RCT6?From 2.0 to 3.6 V.

The OPA2604 is a dual, FET-input operational amplifier. This blog gives you a basic overview of the OPA2604 operational amplifier, including its pinout, features and specifications, similar products, and more, to help you quickly understand what the OPA2604 is.We will be happy to find this blog useful for people who like electronic components 😊.CatalogOPA2604 PinoutOPA2604 FeaturesOPA2604 ApplicationOPA2604 AdvantageOPA2604 CircuitOPA2604 Equivalent / ReplacementOPA2604 ManufacturerComponent DatasheetFAQOPA2604 PinoutThe OPA2604 op-amp has a total of 8 pins. However, you need to understand the function of each pin to work better for you.The OPA2604 pinout is shown below.In addition, the pin functions of the OPA2604 are described below:Pin NO.Pin NamePin Description1Output AOutput Of Amplifier A2-In AInverting Input Of Amplifier A Non Inverting Input Of Amplifier A3+In ANon Inverting Input Of Amplifier A4V-Negative Power Supply5+In BNon Inverting Input Of Amplifier B6-In BInverting Input Of Amplifier B7Output BOutput Of Amplifier B8V+Positive Power SupplyOPA2604 FeaturesLow Distortion: 0.0003% At 1khzUnity-gain StableWide Supply Range: Vs = ±4.5 To ±24vDrives 600ω LoadsHigh Slew Rate: 25v/µsLow Noise: 10nv/√hzWide Gain-bandwidth: 20mhzOPA2604 ApplicationProfessional Audio EquipmentTransducer AmplifierData AcquisitionPCM DAC I/V ConverterActive FiltersSpectral Analysis EquipmentOPA2604 AdvantageThe OPA2604 is a dual FET input operational amplifier designed for enhanced AC performance. Extremely low distortion, low noise and wide bandwidth provide excellent performance for high quality audio and other applications requiring excellent dynamic performance. New circuit technology and special laser trimming of dynamic circuit performance produce extremely low harmonic distortion. The result is an op-amp with excellent audio quality. the OPA2604's low-noise FET input provides a wide dynamic range, even at high source impedances. The offset voltage is laser-trimmed to minimize the need for interstage coupling capacitors. the OPA2604 is available in an 8-pin plastic mini-DIP and SO-8 surface mount package and is specified over a temperature range of -25°C to +85°C.OPA2604 CircuitCircuit schematics can help us better understand how a component or chip is used in a circuit and how it works. Making them work in an actual circuit is a reference. OPA2604 Equivalent / ReplacementThe equivalent of OPA2604 is OPA2134.Before choosing an alternative, please understand the differences and compare the data sheet, pinout and application.OPA2604 ManufacturerTexas Instruments Incorporated (TI) is an American technology company headquartered in Dallas, Texas, that designs and manufactures semiconductors and various integrated circuits, which it sells to electronics designers and manufacturers globally. It is one of the top 10 semiconductor companies worldwide based on sales volume. The company's focus is on developing analog chips and embedded processors, which account for more than 80% of its revenue. TI also produces TI digital light processing technology and education technology products including calculators, microcontrollers and multi-core processors. The company holds 45,000 patents worldwide as of 2016.Component DatasheetOPA2604 DatasheetFAQWhat is OPA2604?OPA2604 is a dedicated op-amp designed by Texas Instruments for high performance audio systems. What are the features of OPA2604?Ultra-low harmonic distortion, low noise, high gain bandwidth and other features. OPA2604AP and OPA5532, which is better?OPA2604AP is a better dual op-amp IC, much better than OPA5532, but also more expensive. They are interchangeable. What are the applications of OPA2604?Generally used in spectrum analyzers, active filters, etc.

I IntroductionThe LM393 is a dual voltage comparator. this means that it accepts 2 inputs for comparison.The output load resistance of LM393 comparator can be connected to any power supply voltage within the allowable power supply voltage range, and is not limited by the voltage value of the Vcc terminal. This output can be used as a simple open circuit to ground SPS (when the load resistor is not used), the sink current of the output part is limited by the β value of the driver and the device that can be obtained. When the limit current (16mA) is reached, the output transistor will exit and the output voltage will rise quickly.In this blog, we will discuss 3 ways to use the LM393 comparator to build circuits, including: Infrared Obstacle Avoidance Module, Ni-Cd Battery Charger, and PWM Modulation Circuit.LM393 images are for reference only.Figure 1. LM393 ComparatorCatalogI IntroductionII LM393 Based Infrared Obstacle Avoidance Module2.1 Module Description2.2 Description of Module Parameters2.3 Module Interface DescriptionIII LM393 Ni-Cd Battery ChargerIV LM393 PWM Modulation CircuitOrdering & QuantityII LM393 Based Infrared Obstacle Avoidance ModuleFigure 2. LM393 Infrared Obstacle Avoidance Module2.1 Module DescriptionThe sensor module has strong adaptability to ambient light. It has a pair of infrared emitting and receiving tubes. The transmitting tube emits infrared rays of a frequency. When it encounters an obstacle (reflecting surface) in the detection direction, it will be reflected back and received by the receiving tube.After the received infrared light is processed by the comparator circuit, the green indicator light will light up, and the signal output interface outputs a digital signal (a low-level signal). The detection distance can be adjusted by the potentiometer knob. The effective distance range is 2-30cm, and the operating voltage It is 3.3V-5V.The detection distance of the sensor can be adjusted by a potentiometer, which has the characteristics of small interference, easy assembly and convenient use. It can be widely used in many situations such as robot obstacle avoidance, obstacle avoidance trolley, pipeline counting and black and white line tracking.2.2 Description of Module ParametersWhen the module detects an obstacle signal in front, the green indicator on the circuit board lights up, and the OUT port continuously outputs a low-level signal. The detection distance of this module is 2～30cm, and the detection angle is 35°. In addition, the detection distance can be adjusted by the potentiometer: By adjusting the potentiometer clockwise, the detection distance increases; By adjusting the potentiometer counterclockwise, the detection distance decreases;The sensor is active infrared reflection detection, so the reflectivity and shape of the target is the key to the detection distance. Among them, the black detection distance is small and the white is large; the distance of small areas is small, and the distance of large areas is large;The output port OUT of the sensor module can be directly connected to the IO port of the single-chip microcomputer, or it can directly drive a 5V relay; connection mode: VCC-VCC; GND-GND; OUT-IO;The LM393 comparator has the characteristics of stable operation;3-5V DC power supply can be used to power the module. When the power is turned on, the red power indicator lights;has 3mm screw holes for easy fixing and installation;Circuit board size: 3.2CM*1.4CM;The module has adjusted the threshold comparison voltage through the potentiometer. Unless under special circumstances, please do not adjust the potentiometer at will.2.3 Module Interface Description VCC external 3.3V-5V voltage (can be directly connected to 5v microcontroller and 3.3v microcontroller); Connect GND externally to GND; OUT small board digital output interface (0 and 1); The working current is within 10ma;Barrier sensor module as shown in Figure 3.Figure 3. Infrared Reflective Sensor ModuleIII LM393 Ni-Cd Battery ChargerThe cost-effective nickel-cadmium battery charger formed by LM393 comparator is shown in Figure 4, which has the following characteristics:Figure 4. Nickel-Cadmium Battery ChargerConstant current charging is interspersed with large current discharge. The constant current charging current is about 300mA, and the discharge current increases as the battery voltage increases. When the battery is nearly full, the discharge current reaches 400mA. Charge for 1.5 seconds and discharge for 0.5 seconds at intervals. After the high current charging is completed, there is about 5mA trickle charging.The battery voltage is detected during discharge. Because the voltage during charging is always higher than the voltage during discharging. If there is an error between the detection and the actual working state of the battery during charging, the detection can more reflect the capacity of the battery when discharging.The number of rechargeable batteries can be 1 to 4. For 500mAh nickel-cadmium batteries, the charging time is about 2 hours, which can meet the general needs.IV LM393 PWM Modulation CircuitWe know that PWM generally requires a sawtooth wave and a control voltage to be compared with a comparator to obtain a PWM pulse. The comparator 2 of LM393 votage comparator will be used as a PWM comparator, whose non-inverting input end is the control voltage input end, and the inverting input end is the sawtooth wave input end. The output terminal (pin 7) is used as the output terminal to send the PWM dimming signal to the IRN pin of the IRS2540/1 via the isolation diode VD.The LM393 circuit of PWM Modulation is shown in Figure 5 below.Figure 5. PWM Modulation CircuitThe generation of the sawtooth wave is realized by the comparator 1 of LM393. If you do not look at the capacitor C1, the comparator 1 is a multivibrator with a square wave output. In order to obtain the sawtooth wave, a capacitor C1 is connected in parallel with the COM end of the output end of the comparator 1.This is actually the charging process of the output terminals R1 and C1 of the comparator 1. If the capacitance of this capacitor is large enough, but because the charging of C1 requires R1, and the discharge of C1 is the output transistor of the comparator, then the rise and fall of the voltage at the output of the comparator will be asymmetric, which will form an oscillating sawtooth wave.Figure 6. Oscillating Sawtooth WaveDue to the VBUS application of the power supply of the circuit in the figure, it needs to be stepped down with RS, and the voltage regulation of VD2 and the power supply bypass capacitors C3 and C4 are required. After reading the blog, have you better understand LM393? If you are also interested in how to DIY your solar tracking car by using LM393 , you may wish to browse right here right now!Finally, if you have any questions about LM393, please do not hesitate to leave a message in the comment section below!

Product OverviewThe TDA2822M is a monolithic integrated circuit in 8 lead Minidip package. It is intended for use as dual audio power amplifier in portable cassette players and radios. This blog will introduce TDA2822M systematically from its features, pinout to its specifications, applications, also including TDA2822M datasheet and so much more. Video: Best Amplifier Circuit of TDA2822m Pure Sound No ParasiteCatalogProduct OverviewTDA2822M FeaturesTDA2822M PinoutTDA2822M ApplicationsTDA2822M CAD ModelsTDA2822M Circuit DiagramTDA2822M Schematic DiagramTDA2822M ReplacementTDA2822M SpecificationTDA2822M vs KA2209TDA2822M ManufacturerTDA2822M DatasheetUsing WarningsTDA2822M FAQ TDA2822M FeaturesSupply Voltage Down to 1.8vLow Crossover DistorsionLow Quiescent CurrentBridge Or Stereo Configuration TDA2822M PinoutThe following figure is the diagram of TDA2822M pinout. TDA2822M Pinout TDA2822M ApplicationsAudio, Signal Processing, Communications & Networking TDA2822M CAD ModelsThe followings are TDA2822M Symbol, Footprint, and 3D Model. TDA2822M Symbol TDA2822M Footprint TDA2822M 3D Model TDA2822M Circuit DiagramThe following is the circuit diagram of TDA2822M. Test Circuit (Stereo) Test Circuit (Bridge) TDA2822M Schematic DiagramThe architecture of TDA2822M is shown in the picture below. TDA2822M Schematic Diagram TDA2822M ReplacementKA2209, KA2209B, S1A2209A01-D0B0 TDA2822M SpecificationProduct AttributeAttribute ValueManufacturer:STMicroelectronicsProduct Category:Audio AmplifiersSeries:TDA2822MProduct:Audio AmplifiersClass:Class-ABOutput Power:2 WMounting Style:Through HoleType:1-Channel Mono or 2-Channel StereoPackage / Case:PDIP-8Audio - Load Impedance:32 OhmsTHD plus Noise:0.002Supply Voltage - Max:15 VSupply Voltage - Min:1.8 VMinimum Operating Temperature:- 40 CMaximum Operating Temperature:+ 150 CDescription/Function:Headphone/SpeakerHeight:3.32 mmInput Type:SingleLength:10.92 mmOutput Current:1000 mASupply Type:SingleWidth:6.6 mmBrand:STMicroelectronicsGain:39 dBNumber of Channels:2 ChannelIb - Input Bias Current:100 nAOperating Supply Current:1 AOperating Supply Voltage:3 V, 5 V, 9 V, 12 VOutput Signal Type:Differential, SinglePd - Power Dissipation:1400 mWProduct Type:Audio AmplifiersPSRR - Power Supply Rejection Ratio:40 dBFactory Pack Quantity:50Subcategory:Audio ICsUnit Weight:0.032805 oz TDA2822M vs KA2209Source Content uidTDA2822MKA2209Part Life Cycle CodeObsoleteObsoletePart Package CodeDIPDIPPackage DescriptionMINI, DIP-8DIP, DIP8,.3Pin Count88Reach Compliance CodeunknowncompliantECCN CodeEAR99EAR99HTS Code8542.33.00.018542.33.00.01Factory Lead Time12 Weeks Bandwidth-Nom22 kHz20 kHzConsumer IC TypeAUDIO AMPLIFIERAUDIO AMPLIFIERGain39 dB40 dBHarmonic Distortion0.10.1JESD-30 CodeR-PDIP-T8R-PDIP-T8JESD-609 Codee3e0Number of Channels21Number of Functions22Number of Terminals88Output Power-Nom1 W0.65 WSeated Height-Max5.08 mm Supply Current-Max9 mA Supply Voltage-Max (Vsup)15 V9 VSupply Voltage-Min (Vsup)1.8 V1.8 VSurface MountNONOTechnologyBIPOLARBIPOLARTerminal FinishMatte Tin (Sn) - annealedTin/Lead (Sn/Pb)Terminal FormTHROUGH-HOLETHROUGH-HOLETerminal Pitch2.54 mm2.54 mmTerminal PositionDUALDUALTime@Peak Reflow Temperature-Max (s)NOT SPECIFIEDNOT SPECIFIEDWidth7.62 mm  TDA2822M ManufacturerST is a global semiconductor leader delivering intelligent and energy-efficient products and solutions that power the electronics at the heart of everyday life. ST’s products are found everywhere today, and together with our customers, we are enabling smarter driving and smarter factories, cities and homes, along with the next generation of mobile and Internet of Things devices. TDA2822M DatasheetYou can download this datasheet for TDA2822M Datasheet from the link given below:TDA2822M Datasheet Using WarningsNote: Please check their parameters and pin configuration before replacing them in your circuit. TDA2822M FAQHow is the tda2822 stereo amplifier with PCB?I will show you the TDA2822 Stereo amplifier project with PCB.  It is a stereo system. Both channels are the same. To begin with, the 9V from power supply—battery goes to the circuit. And, C3 is a filter capacitor to keep this voltage is more stable. When sound is too fluctuating. What is the voltage of a tda2822m integrated circuit?This integrated circuit has an 8-pin mini DIP presentation. The TDA2822M has a low quiescent current, little distortion and can use a voltage source ranging from 1.8 to 15 V. What is the bandwidth expansion rate of the tda2822?The bandwidth expansion rates at 40dB 120kHz. What is the TDA2822M intended for use in?Dual audio power amplifier What type of circuit is the TDA2822M?Monolithic

DescriptionLM3886 is a high-performance audio power amplifier. Under the rated working voltage, it is capable of delivering 68W of continuous average power to a 4Ω load and 38W into 8Ω with 0.1% THD+N from 20Hz–20kHz.The performance of the LM3886, utilizing its Self Peak Instantaneous Temperature ('Ke) (SPiKe) protection circuitry, puts it in a class above discrete and hybrid amplifiers by providing an inherently, dynamically protected Safe Operating Area (SOA). SPiKe protection means that these parts are completely safeguarded at the output against overvoltage, undervoltage, overloads, including shorts to the supplies, thermal runaway, and instantaneous temperature peaks.The LM3886 maintains an excellent signal-to-noise ratio of greater than 92dB with a typical low noise floor of 2.0µV. It exhibits extremely low THD+N values of 0.03% at the rated output into the rated load over the audio spectrum, and provides excellent linearity with an IMD (SMPTE) typical rating of 0.004%.Catalog DescriptionCAD ModelsFeaturesApplicationsParametersElectrical CharacteristicsPinout Circuit DiagramPackage Product ComplianceComponent DatasheetProduct ManufacturerFAQOrdering & QuantityCAD Models LM3886 Symbol LM3886 FootprintFeatures68W Cont. Avg. Output Power into 4Ω at VCC= ±28V38W Cont. Avg. Output Power into 8Ω at VCC= ±28V50W Cont. Avg. Output Power into 8Ω at VCC= ±35V135W Instantaneous Peak Output Power CapabilitySignal-to-Noise Ratio ≥ 92dBAn Input Mute FunctionOutput Protection from a Short to Ground or to the Supplies via Internal Current Limiting CircuitryOutput Over-Voltage Protection against Transients from Inductive LoadsSupply Under-Voltage Protection, not Allowing Internal Biasing to Occur when |VEE| + |VCC| ≤ 12V, thus Eliminating Turn-On and Turn-Off Transients11-Lead TO-220 PackageWide Supply Range 20V - 94VApplicationsComponent stereoCompact stereoSelf-powered speakersSurround-sound amplifiersHifg-end stereo TVsParametersAudio input typeAnalog InputArchitectureClass-ABSpeaker channels (Max)MonoPower stage supply (Max) (V)94Power stage supply (Min) (V)20Load (Min) (ohms)4Output power (W)68SNR (dB)110THD + N @ 1 kHz (%)0.03Iq (Typ) (mA)50Control interfaceHardwareClosed/open loopOpenAnalog supply (Min) (V)20Analog supply (Max) (V)84Power to parallel bridge tied load (Max) (W)68PSRR (dB)120Operating temperature range (C)0 to 70Number of Terminals11Number of Functions1Brand NameTexas InstrumentsElectrical Characteristics The following specifications apply for V＋=+28V, V－=-28V, lMUTE=-o.5mA with RL =4Ω unless otherwise specified. Limits apply for TA=25℃. Pinout Pin 1 is the positive power supply V+ terminal;Pin 2 is an empty pin(NC);Pin 3 is the output terminal after signal amplification;Pin 4 is the negative power V- terminal;Pin 5 is an empty pin(NC) (internally independent, but in the 150W LM3886, this pin should be connected to V+);Pin 6 is an empty pin(NC);Pin 7 is the ground (GND) terminal;Pin 8 is the mute end. If it is not needed, it should be connected to the v-terminal.Pin 9 is the inverting input of the signal;Pin 10 is the non-inverting input terminal of the signal;Pin 11 is an empty pin(NC)　　Circuit DiagramPackage LM3886 has two packaging methods. One is that the back plate is not insulated from the inner electrode, and it must be insulated when a heat sink is added. The other is that the back plate is insulated from the internal electrodes, so there is no need to consider insulation when adding a heat sink.Product ComplianceECCNEAR99USHTS8542330001Component DatasheetDatasheetLM3886 DatasheetProduct ManufacturerTexas Instruments Inc. (TI)  is an American technology company that designs and manufactures semiconductors and various integrated circuits, which it sells to electronics designers and manufacturers globally. Its headquarters are in Dallas, Texas, United States. TI is one of the top ten semiconductor companies worldwide, based on sales volume. Texas Instruments's focus is on developing analog chips and embedded processors, which accounts for more than 80% of their revenue. TI also produces TI digital light processing (DLP) technology and education technology products including calculators, microcontrollers and multi-core processors. To date, TI has more than 43,000 patents worldwide.FAQWhat is LM3886?The LM3886 is a high-performance audio power amplifier capable of delivering 68W of continuous average power to a 4Ω load and 38W into 8Ω with 0.1% THD+N from 20Hz–20kHz. What does audio amplifier do?The goal of audio amplifiers is to reproduce input audio signals at sound-producing output elements, with desired volume and power levels—faithfully, efficiently, and at low distortion.

CatalogIntroductionFeaturesPackagePinsFunction DescriptionParameterApplicationCH340 DatasheetCH340 FAQIntroductionCH340 is a USB bus conversion chip, it can realize USB to UART interface or USB to printer interface.In serial UART mode, CH340 provides common MODEM liaison signal, used to expand UART interface of computer or upgrade the common serial device to USB bus directly. For more information on USB conversion to printer interface please refer to the manual CH340DS2.  FeaturesFull speed USB device interface, compatible with USB0.Emulatestandard UART interface, used to upgrade the serial peripherals, or expand UART interface via USB Originalserial applications are totally compatible, without any modification in Windows operation Hardwarefull duplex serial UART interface, built-in transmit-receive buffer, supports communication baud rate varies from 50bpsSupports common MODEM liaison signal RTS, DTR, DCD, RI, DSR andThroughexternal level conversion chip provide further RS232, RS485, RS422 interface, CH340R supports IrDA criterion SIR infrared communication, supports baud rate varies from 2400bps toSoftware compatible with CH341, use driver of CH341Support5V and 3V power supply even 3V.CH340C, CH340E and CH340B have built-in crystal, no external crystal, CH340B also integrates EEPROM used to configure the serial number, SOP-16 and SSOP-20 and MSOP-10 lead-free RoHS compliant  Package Package shapeWidth of plasticPitch of PinInstruction of packageOrdering typeSOP-163.9mm150mil1.27mm50milSmall outline package of 16-pinCH340GSOP-163.9mm150mil1.27mm50milSmall outline package of 16-pinCH340CSOP-163.9mm150mil1.27mm50milSmall outline package of 16-pinCH340BMSOP-103.0mm118mil0.50mm19.7milShrink small outline package of 10-pinCH340ESSOP-205.30mm209mil0.65mm25milShrink small outline package of 20-pinCH340TSSOP-205.30mm209mil0.65mm25milShrink small outline package of 20-pinCH340RModel differences:CH340C, CH340E and CH340B have built-in crystal, no external crystal;CH340B also has built-in EEPROM used to configure the serial number,etc.Some functions can be customized. CH340R provides reverse polarity TXD and MODEM signals. (No spot) PinsSSOP20SOP16MSOP10Pin NamePin TypePin Description (description in bracket is only aboutPin No.Pin No.Pin No.CH340R)19167VCCPOWERPositive power input port, requires an external 0.1uF powerdecoupling capacitor813GNDPOWERPublic ground, ground connection for USB     Connect to VCC to input external power when 3.3V power54NONEV3POWERsupply, connect to 0.1uF decoupling capacitor when 5V power supply   XIINCH340T/R/G: Input of crystal oscillator, connect to crystal97NONEand capacitor   NC.NONECH340C: No Connection, must be suspended   RST#INCH340B: Input of external reset, active low, built-in     pull-up resistor   XOOUTCH340T/R/G: Output of crystal oscillator, connect to108NONEcrystal and capacitor   NC.NONECH340C/B: No Connection, must be suspended651UD+USB signalDirectly connect to D+ data wire of USB bus762UD-USB signalDirectly connect to D- data wire of USB bus20NONENONENOS#INForbid USB device suspending, active low, built-in pull-upresistor328TXDOUTTransmit asynchronous data output(reverse output forCH340R)439RXDINReceive asynchronous data input, built-in configurablepull-up and pull-down resistor1195CTS#INMODEM liaison input signal, clear to send, activelow(high)1210NONEDSR#INMODEM liaison input signal, data set ready, activelow(high)1311NONERI#INMODEM liaison input signal, ring indicator , activelow(high)1412NONEDCD#INMODEM liaison input signal, data carrier detect, activelow(high)1513NONEDTR#OUTMODEM liaison output signal, data terminal ready, activelow(high)16144RTS#OUTMODEM liaison output signal, request to send, activelow(high)2NONENONEACT#OUTUSB configuration completed state output, active low1815NONER232INCH340T/R/G/C: Assistant RS232 enable, active high,built-in pull-down resistor   TNOWOUTCH340T/E/B: Ongoing data transmission status indicator,17156active high     CH340R:Serial mode input setting, built-in pull-up resistor, SIR infrared serial interface when low, common serial   IR#INinterface when high1NONENONECK0OUTCH340T: clock outputNC.NONECH340R:No Connection, must be suspend Function DescriptionCH340 chip has built-in USB pull-up resistor, UD+ and UD- pins must be connected to USB bus directly. CH340 chip has built-in power-on reset circuit. CH340B also provides low active external reset pin.CH340G/CH340T/CH340R chips need to work with 12MHz clock signal supplied to XI pin. Generally, clock signal is generated crystal oscillation with inverter in CH340. The peripheral circuit needs to place a crystal of 12MHz between XI and XO, and connect to a capacitor to ground separately.CH340C, CH340E and CH340B chip have built-in clock generator, no external crystal and oscillating capacitor required.CH340B chip also provides EEPROM for configuring data area, product serial number and other information could be customized for each chip by specific software tools, configurable data area is shown in the table below. Byte AddressAbbreviati on Description of chip configuration data area Default 00H SIGFor CH340B: Internal configuration information valid reg, must be 58H.For CH340H/S: External configuration information valid reg, must be 53H.Invalid for other value 00H01HMODESerial mode, must be 23H23H 02H CFGSpecific configuration of chip,bit5 is used to configure product Serial Number: 0= valid; 1= invalid. FEH 03H WPInternal configuration information write protect flag，57H imply read only, otherwise can be rewrite 00H 05~04H VIDVendor ID, high byte is behind, any value. Set to 0000H or0FFFFH implies VID and PID using vendor default value 1A86H07~06HPIDProduct ID, high byte is behind, any value7523H0AHPWRMax Power, The maximum supply current in 2mA units31H 17~10H SNSerial Number, the length of ASCII string is 8, disable the Serial number when the first byte is not ASCII character(21H~7FH) 12345678 3FH~1AH PROD For CH340B: Product String, Unicode string for Product description. The first byte is by total bytes (less than 26H), the next byte is 03H, Unicode string after that, using vendor default description when do not meet characteristics above.Using product default description when the first byte is00HOthers (Reserved unit)00H or FFHCH340 chip supports 5V and 3.3V power voltage. When using 5V source power, the VCC pin input 5V power and the V3 pin should connect with decoupling 0.1uF capacitor. When using 3.3V power voltage, connects V3 with VCC, both input 3.3V power voltage, and the other circuit voltage which connected with CH340 cannot exceed 3.3V. CH340 supports USB device suspending automatically to save power. USB device suspend is forbidden when NOS# is driven low.The DTR# pin of CH340 is used as a configuration input pin before the USB configuration is complete. An external 4.7KΩ pull-down resistor can be connected with this pin to generate default low level during USB enumeration, apply larger supply current to the USB bus via the configuration descriptor. In UART mode, CH340 chip contains these pins: data transfer pins, MODEM liaison signal pins and assistant pins. Data transfer pins contain: TXD and RXD pin. RXD keeps high when UART reception is idle. For CH340G/C/T/R chip, If R232 pin is driven high, assistant RS232 function will be enabled, an internal inverter will automatically insert to the RXD pin , and the pin becomes low by default. When UART transmission is idle, the TXD pin of CH340G/C/B/T keeps high, while CH340R keeps low. MODEM liaison signal pins contain: CTS#, DSR#, RI#, DCD# and RTS#. All these MODEM liaison signal are controlled and function defined by computer applications. Assistant pins contain: IR#, R232, CK0, ACT# and TNOW. When IR# is low-level, infrared serial interface mode is enabled. R232 pin is used to control assistant RS232 function. If R232 pin is driven high, the RXD pin input will be reversed automatically. ACT# pin is USB device configuration complete status output (such as USB infrared adapter ready). TNOW pin indicates CH340 is transmitting data from UART when it is high-level and becomes low when transmit over. In RS485   and other half-duplex mode, TNOW could be used to indicate UART transmit-receive status. IR# and R232 are detected only once when chip powered on and reset. CH340 has built-in separate transmit-receive buffer and supports simplex, half-duplex and full duplex UART communication. Serial data contains one low-level start bit , 5, 6, 7  or 8  data bits and 1  or 2  high-level stop bits, supports  odd/even/mark/space check. CH340 supports common baud rate: 50, 75, 100, 110, 134.5, 150, 300, 600, 900, 1200, 1800, 2400, 3600, 4800, 9600, 14400, 19200, 33600, 38400, 56000, 57600, 76800, 115200, 128000, 153600, 230400, 460800, 921600,1500000, 2000000 etc. The baud rate error of CH340 UART reception allows not less than 2%, the baud rate error of CH340G/CH340T/CH340R UART transmission is less than 0.3%, less than 1% for CH340C/CH340E/ CH340B. In the Windows operation system, CH340 driver can emulate standard serial port. So the mostly original serial applications are totally compatible, without any modification. CH340 can be used to upgrade the serial interface peripherals, or expand extra serial port for computers via USB bus, through external level conversion chip provide further RS232, RS485, RS422 interface, etc. Only need to add infrared transceiver, CH340R can expand SIR infrared adapter for computer via USB bus, realize infrared communication between computer and peripheral equipment that comply with IrDA specifications. ParameterAbsolute maximum rating (Critical or exceeding absolute maximum can cause permanent damage todevice)NameParameter DescriptionMin.Max.Units TA Ambient temperatureCH340G/CH340T/CH340R-4085℃CH340C/CH340E/CH340B-2070℃TSStorage temperature-55125℃VCCSupply Voltage(VCC connects to power, GND to ground)-0.56.0VVIOThe voltage of input or output pin-0.5VCC+0.5V Electrical Parameter (test conditions: TA=25℃, VCC=5V, exclude pin connected to USBbus)(All the current parameters should multiply the coefficient of 40% when the power is 3.3V) Sequence Parameter(test conditions: TA=25℃,VCC=5V)NameParameter DescriptionMin.TypicalMax.UnitsFCLKFrequency of input clock in XI11.9812.0012.02MHzTPRReset time of power-up203550mS ApplicationUSB to RS232 Converter Configuration using CH340T USB to RS232 Converter Configuration using CH340BThe image above use CH340T/CH340B (or CH340C ) to realize USB to RS232 converter. CH340 provides common UART and MODEM signal, converts TTL to RS232 through level conversion chip U8. Port P11 is DB9 connector, the pin and its function are the same as common PC DB9 connector, the chips similar with U8 have MAX213/ADM213/SP213/MAX211 etc. U8 and C46/C47/C48/C49/C40 could be removed when realize USB to TTL converter only. The signal lines in the image only RXD、TXD and public ground need connected, the other signal lines should suspend when not use. P2 is USB port, USB bus contains a pair of 5V power lines and a pair of data signal lines . Usually, the color of +5V power line is red, the black one is ground. D+ signal line is green and the D- signal line is white. The max supply current of USB bus is up to 500mA. Generally, CH340 and low power consumption USB products can use the 5V power supplied by USB bus directly. If the USB products supply standing power by other manner, CH340 should use this power too. If the USB bus power and standing power are necessary at the same time, connect a 1Ω resistor between USB bus 5V power line and USB products 5V standing power line, and connect the ground lines of these two power directly. The capacitor C8 on V3 pin is 0.1uF, used to CH340 internal power node decoupling. The capacitor C9 is 0.1uF, used to external power decoupling. For CH340G/T/R chip, Crystal X2, capacitor C6 and C7 are used for clock oscillation circuit. The X2 is 12MHz quartz crystal, C6 and C7 are monolithic or high frequency ceramic capacitors with 22pF. If X2 is ceramic with low cost, C6 and C7 must use the recommended value of crystal manufacturer and generally is 47pF. For the crystal which is difficult to oscillate, halved value is suggested for C6.For CH340C/E/B chip, crystal X2 and capacitor C6, C7 are not required. When designing the PCB, pay attention to: decoupling capacitor C8 and C9 must keep near to connection pin of CH340; makes sure D+ and D- signal lines are parallel and supply ground lines or pour copper beside them to decrease the interference from outside signal; the signal lines relevant to XI and XO should be kept as short as possible. In order to lessen the high frequency interference, around the ground wire or pour copper around the relevant components. USB to RS232 Converter Configuration (3-wire)The image below is USB to 3-wire RS232 converter design which is the most basic and most commonly used, U5 uses MAX232/ICL232/SP232 etc.USB to RS232 Converter Configuration (Simplified version using R232)The image above is USB to RS232 converter design too, the function of this circuit is the same with 7.2 section except the range of output RS232 is narrower. When R232 pin is driven high, the assistant RS232 function will be enabled, just need to add some diodes, transistors, resistors and capacitors, the special level conversion chip U5 in section 7.2 could be replaced and the hardware cost is lower. USB to Infrared AdapterThe image above is USB to infrared adapter design is composed with USB convert IrDA infrared chip CH340R and infrared transceiver U14 (ZHX1810/HSDL3000 etc).The resistor R13 is used to weaken influence of large current in infrared transmitting. The current limiting resistor R14 should be adjusted according to the manufacturer’s recommended value of the infrared transceiver U14. USB to RS485 Converter ConfigurationThe TNOW pin can be used to control DE (high active send enable) and RE# (low active receive enable) pin of RS485 transceiver. CH340 DatasheetYou can download the datasheet given the link below.CH340 Datasheet CH340 FAQWhat is CH340? CH340 is a USB bus conversion chip, it can realize USB to UART interface or USB to printer interface. In serial UART mode, CH340 provides common MODEM liaison signal, used to expand UART interface of computer or upgrade the common serial device to USB bus directly. What is CH340 Arduino?The CH340 is an inexpensive USB-to-Serial chip (datasheet here) that takes the place of the Rev3 board's more expensive ATmega16U2. This creates issues when programming the Arduino board with certain operating systems (specifically Windows), however, for most Linux and Mac systems - there appears to be no issue. What is CH340 known for? To put simply, Ch340 is basically a USB bus convert chip. It allows the USB to be converted to serial interface, serial signals to USB etc. How do I download CH340 driver? CH340 Drivers for Windows, Mac and LinuxDownload the Windows CH340 Driver.Unzip the file.Run the installer which you unzipped.In the Arduino IDE when the CH340 is connected you will see a COM Port in the Tools > Serial Port menu, the COM number for your device may vary depending on your system. What programmer should I use for Arduino Nano? The Arduino Nano can be programmed using the free Arduino software (download). Select "Arduino Diecimila, Duemilanove, or Nano w/ ATmega168" or "Arduino Duemilanove or Nano w/ ATmega328" from the Tools > Board menu.