The Kynix Components

CD4543, a very convenient and easy-to-use 7-segment latch/decoder/driver chip. Where is the CD4543 chip generally used? Maybe you can see the incandescent lamp overhead by looking up. Yes, in our daily life, CD4543 is often used to drive various light-emitting or display items, such as Light-Emitting Diodes (LED), incandescent, gas-discharge, and fluorescent displays. If you are interested in this kind of tiny chip that can bring convenience to our vision, then this blog can give you a better understanding of it.CatalogCD4543 PinoutCD4543 Truth TableCD4543 AdvantagesCD4543 FeaturesCD4543 ApplicationsCD4543 CAD CAE SymbolsCD4543 PackageCD4543 Logic Circuit DiagramCD4543 ParametersCD4543 ManufacturerComponent DatasheetOrdering & QuantityCD4543 Pinout CD4543 Truth Table It can be seen from the truth table that A, B, C, and D are four-digit BCD code input pins. And a, b, c, d, e, f, g are the position codes of the seven segments displayed by seven-segment characters. When BI (Blanking) is 1 (high level), the output is no display state.When BI is 1, LD is 0, the display will not change.When BI is 1, LD is 1, the seven-segment code display output changes according to the BCD code input. At this time, if the DCBA is a code input of 0-9, the output will display 0-9 respectively. If the DCBA is a code input of 10-15, the output will not display. Pin 9 (VDD) and Pin 8 (Vss) are power + and power ground.CD4543 AdvantagesCD4543B differs from the CD4056B in that it has a display blanking capability instead of a level-shifting function and requires only one power supply. When the CD4056B is used in the level shifting mode, two power supplies are required. When the CD4543B is used for LCD applications, a square wave must be applied to the PHASE input and the backplane of the LCD device. For LED applications a logic 1 is required at the PHASE input for common-cathode devices; a logic 0 is required for common-anode devices (see truth table). The CD4543B is supplied in 16-lead dual-in-line plastic packages (E suffix), 16-lead small-outline packages (M, M96, MT, and NSR suffixes), and 16-lead thin shrink small-outline packages (PW and PWR suffixes).CD4543 FeaturesDisplay blanking of all illegal input combinationsLatch storage of codeCapability of driving two low power TTL loads, two HTL loads, or one low power Schottky load over the full rated-temperature rangePin-for-pin replacement for the CD4056B (with pin 7 tied to VSS)Direct LED driving capability100% tested for quiescent current at 20 VMaximum input current of 1 µA at 18 V over full package-temperature range; 100 nA at 18 V and 25°CNoise margin (full package-temperature range) = 1 V at VDD = 5 V 2 V at VDD = 10 V 2.5 V at VDD = 15 V 5-V, 10-V, and 15-V parametric ratings Meets all requirements of JEDEC Tentative Standard No. 13B, "Standard Specifications for Description of ’B’ Series CMOS Devices"CD4543 ApplicationsInstrument display driverDashboard display driverComputer/calculator display driverTiming device driver (clocks, watches, timers)CD4543 CAD CAE SymbolsPackagePinsDownloadPDIP (N)16View optionsSO (NS)16View optionsSOIC (D)16View optionsTSSOP (PW)16View optionsCD4543 PackagePDIP (N)16181 mm²19.3 x 9.4SOIC (D)1659 mm²9.9 x 6SOP (NS)1680 mm²10.2 x 7.8TSSOP (PW)1622 mm²4.4 x 5CD4543 Logic Circuit DiagramCD4543 ParametersBits (#)7Channels (#)4Configuration4:7Digital input leakage (Max) (uA)5ESD CDM (kV)0.75ESD HBM (kV)2F @ nom voltage (Max) (MHz)8FunctionDecoder, DemultiplexerICC @ nom voltage (Max) (mA)0.3IOH (Max) (mA)-1.5IOL (Max) (mA)1.5Operating temperature range (C)-55 to 125Product typeStandardRatingCatalogTechnology FamilyCD4000tpd @ nom Voltage (Max) (ns)400VCC (Max) (V)18VCC (Min) (V)3Voltage (Nom) (V)5, 10, 15CD4543 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.Component DatasheetCD4543 Datasheet

This blog will introduce a chip with good electrical performance and low design cost: the LM5117 chip.  The LM5117 is a step-down dc-dc controller. The device is typically used to convert a higher dc-dc voltage to alower dc voltage. The Controller features adjustable 750 kHz switching frequency which results in a typical inductor size of 11.3 uH. And what about its pacakge? You can find that LM5117 is available in 2 package option(s): WQFN-24 and HTSSOP-20.CatalogLM5117 Documents And MediaLM5117 Pinout and FunctionsLM5117 Basic ParametersLM5117 FeaturesLM5117 ApplicationsLM5117 AdvantagesLM5117 Typical ApplicationLM5117 CAD CAE SymbolsLM5117 ManufacturerComponent DatasheetOrdering & Quantity LM5117 Documents and MediaUser GuidesAN-2103 LM5117 Evaluation Board (Rev. B)Featured ProductLM5117 Synchronous Buck ControllerDesign ResourcesLM5117 Design with WEBENCH® Power DesignerLM5117 Pinout and Functions　　Pin NumberPin FunctionsPin 1UVLO is the under-voltage lockout pin. The voltage regulator is shut down below 0.4V, and the voltage regulator is in standby mode when it is greater than 0.4V and less than 1.25V. The voltage regulator above 1.25V works normally and stably.Pin 2DEMB is a diode emulation mode pin, which can be floated if not needed.Pin 3RES restarts the timer pin and can configure hiccup current-limiting mode.Pin 4SS can set the internal reference slope of the internal error amplifier.Pin 5RT sets the clock frequency and the maximum frequency can be configured to 750kHz, just connect a resistor between ground, and connect a capacitor to synchronize to the external frequency.Pin 6GroundPin 7VCCDIS is an optional input pin for disabling the regulator.Pin 8FB feedback pin is used to stabilize the set output, and the reference base is 0.8V.Pin 9COMP is the output of the internal error amplifierPin 10CM is the output of the current monitor, which can detect the average current value for programming.Pin 11feet RAMP is the PWM ramp signal.Pin 12CS is the current detection input pin.Pin 13GroundPin 14GroundPin 15Pin 15 is the bottom MOS output drive pin.Pin 16Pin 16 is the VCC power bias pinPin 17SW is the switch node of the buck regulator and provides a bootstrap loop.Pin 18HO is high bridge MOS drive outputPin 19HB is Gaoqiao bootstrap power inputPin 20VIN is the power supply voltage input source of VCC regulatorLM5117 Basic ParametersApprox. price1ku | 1.85 US$Iout (Max)20 AIq (Typ)4.8 mANumber of Phases1Operating temperature range-40℃ to 125℃RatingCatalogRegulated outputs1Switching frequency (Max)750 kHzSwitching frequency (Min)50 kHzVin (Max)65 VVin (Min)5.5 VVout (Max)62 VVout (Min)0.8 VLM5117 FeaturesEmulated Peak Current Mode ControlWide Operating Range from 5.5 V to 65 VRobust 3.3-A Peak Gate DrivesAdaptive Dead-Time Output Driver ControlFree-Run or Synchronizable Clock up to 750 kHzOptional Diode Emulation ModeProgrammable Output from 0.8 VPrecision 1.5% Voltage ReferenceAnalog Current MonitorProgrammable Current LimitHiccup Mode Overcurrent ProtectionProgrammable Soft-Start and TrackingProgrammable Line Undervoltage LockoutProgrammable Switchover to External Bias SupplyThermal ShutdownLM5117 ApplicationsAutomotive InfotainmentIndustrial DC-DC Motor DriversAutomotive USB PowerTelecom ServerLM5117 AdvantagesThe LM5117 is a synchronous buck controller intended for step-down regulator applications from a high voltage or widely varying input supply. The control method is based upon current mode control utilizing an emulated current ramp. Current mode control provides inherent line feed-forward, cycle-by-cycle current limiting and ease of loop compensation. The use of an emulated control ramp reduces noise sensitivity of the pulse-width modulation circuit, allowing reliable control of very small duty cycles necessary in high input voltage applications. The operating frequency is programmable from 50kHz to 750 kHz. The LM5117 drives external high-side and low-side NMOS power switches with adaptive dead-time control. A user-selectable diodeemulation mode enables discontinuous mode operation for improved efficiency at light load conditions. A high voltage bias regulator that allows external bias supply further improves efficiency. The LM5117’s unique analog telemetry feature providesaverage output current information. Additional features include thermal shutdown, frequency synchronization, hiccup mode current limit, and adjustable line undervoltage lockout.LM5117 Typical ApplicationLM5117 CAD CAE SymbolsPackagePinsDownloadHTSSOP (PWP)20View optionsWQFN (RTW)24View optionsLM5117  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.Component DatasheetLM5117 Datasheet

Most people call ESP8266 as a WIFI module, but it is actually a microcontroller. ESP8266 is the name of the microcontroller developed by Espressif Systems which is a company based out of shanghai. This microcontroller has the ability to perform WIFI related activities hence it is widely used as a WIFI module. CatalogESP8266 Pin Configuration and FunctionsESP8266 CAD ModelsESP8266 Functional Block DiagramESP8266 FeaturesESP8266 SpecificationsESP8266 ApplicationsOther Development BoardsESP8266 PackageHow to Program NodeMCU ESP8266ESP8266 Popularity by RegionESP8266 Market Price AnalysisESP8266 ManufacturerComponent DatasheetFAQESP8266 Pin Configuration and FunctionsESP8266 NodeMCU pin functions:ESP8266 CAD ModelsPart SymbolFootprint3D ModelESP8266 Functional Block DiagramESP8266 Functional Block DiagramESP8266 Features802.11 b/g/n support802.11 n support (2.4 GHz), up to 72.2 MbpsDefragmentation2 x virtual Wi-Fi interfaceAutomatic beacon monitoring (hardware TSF)Support Infrastructure BSS Station mode/SoftAP mode/Promiscuous modeESP8266 SpecificationsESP8266 ApplicationsHome appliancesHome automationSmart plugs and lightsIndustrial wireless controlBaby monitorsIP camerasSensor networksWearable electronicsWi-Fi location-aware devicesSecurity ID tagsWi-Fi position system beaconsOther Development BoardsArduino, Raspberry Pi, PIC Development Board, AVR Development Board, MSP430 Launchpad, Intel Edison, Beagle BoneESP8266 PackageHow to Program NodeMCU ESP8266RequirementsAn ESP8266 module.Arduino UNO, UARTbee or any UART to the USB device.Jumper wires.Arduino IDE version 1.6.6 or higher.Get StartedFirst, we’ll need to identify the pinout of ESP8266.ESP8266-01 To set the ESP8266 in programming mode you need to connect its wires like this: ESP8266UARTbeeArduino UNORXDTXDRXGPIO0GNDGNDGPIO2——-——-GNDGNDGNDVCC3.33.3VRST——–———–CH_PD3.3V3.3VTXDRXDTXNOTE: If you are using an Arduino UNO you will need to set Arduino RST to GND. Please be careful with the VCC of the ESP8266, it works only with a 3.3V supply.Setup the Arduino IDE1. Download Arduino IDE.2. Open your IDE and click on File -> Preferences".3. In “Aditional Boards Manager URLs” add this line and click on “OK”:http://arduino.esp8266.com/stable/package_esp8266com_index.json4. Go to “Tools -> Board -> Boards Manager”, type “ESP8266” and install it.5. Go again to “Tools -> Board” and select “Generic ESP8266 Module”.Flash your codeNow you’re ready to use your ESP8266 as a stand-alone module without needing an external micro-controller. ESP8266 Popularity by RegionESP8266 Market Price AnalysisESP8266 ManufacturerEspressif Systems is a public multinational, fabless semiconductor company, headquartered in Shanghai and offices China, India, Brazil, Singapore and Czechia. As a complete-solution provider, we specialize in producing highly-integrated, low-power, Wi-Fi-and-Bluetooth SoCs. Among our most popular IoT solutions are the ESP8266 and ESP32 series of chips, modules and development boards. Component DatasheetNodeMCU ESP8266 DatasheetFAQWhat is esp8266 used for?The ESP8266 WiFi Module is a self contained SOC with integrated TCP/IP protocol stack that can give any microcontroller access to your WiFi network. The ESP8266 is capable of either hosting an application or offloading all WiFi networking functions from another application processor.What is the differences between NodeMCU and esp8266?ESP8266 is a microcontroller with WiFi capability. it requires external flash memory and some antenna to work.The NodeMcu firmware is a Lua language interpreter and has nothing to do with Arduino, but the NodeMcu development board can be used as any other esp8266 development board.What is the range of  esp8266?You may get 300m line-of-sight outdoors. External antennas will give more range if they're oriented in the 'best' direction (usually parallel to each other).What is PWM IC?The TL494 fixed frequency PWM Controller can be used for DC to DC conversion regardless of buck or boost topology. ... This IC feature an output control circuit, a flip flop, a dead time comparator, two different error amplifiers, a 5V reference voltage, an oscillator, and a PWM comparator.What is better esp32 vs esp8266?The ESP32 is much more powerful than the ESP8266, comes with more GPIOs with multiple functions, faster Wi-Fi, and also supports Bluetooth. Many people think that the ESP32 is more difficult to deal with than the ESP8266 because it is more complex.How Can I increase my esp8266 range?A simple way of extending range is to use a HomePlug wireless access point. This plugs into a mains socket where you need to extend your wireless network to. You need a second, normal HomePlug adaptor connected to your router via Ethernet.Does esp8266 support Bluetooth?As well as all the features of the ESP8266, it includes faster Wi-Fi, a CPU core, more GPIOs, and supports Bluetooth. It also features touch sensitive pins, a built-in hall effect sensor and a temperature sensor.How does esp8266 WiFi module work?The ESP8266 can be controlled from your local Wi-Fi network or from the internet (after port forwarding). The ESP-01 module has GPIO pins that can be programmed to turn an LED or a relay ON/OFF through the internet. The module can be programmed using an Arduino/USB-to-TTL converter through the serial pins (RX,TX).How do I know if esp8266 is working?Open the Serial Monitor window from the Arduino IDE and change the following settings at the bottom of the Serial Monitor window: Both NL & CR – send both a newline and carriage return character at the end of a command. 115200 baud – baud rate of communication set to 115200.Why esp8266 is not connected to WiFi?4 Answers. Maybe you have a space in your WIFI SSID so you should check this in your router. Also maybe your WIFI is on 5Ghz and the ESP can't see it because it is only for 2.4 Ghz. Also if your WIFI AP is on a channel from 13 - 14 it also couldn't be seen by the ESP.How many sensors can be connected to esp8266?With the 4051 you can connect up to 8 analog devices to the single analog pin on your ESP8266 (It also uses 3 digital pins, which I'll cover in a moment). 

There have been many articles about LM317, today we will talk about LM317T separately. This blog will cover not only its pinout , features, applications but also its CAD models, functional equivalents and some useful circuits, the datasheet is at the bottom of the page as always. The LM317T belongs to a sort of an adjustable three terminal positive voltage regulator, designed to supply more than 1.5A of load current with an output voltage adjustable over a 1.2V to 3.7V range. The nominal output voltage is selected by means of a resistive divider, making the device exceptionally easy to use and eliminating the stocking of many constant regulators. Apart from using it as a variable voltage regulator, LM317T IC can also be used as a constant voltage regulator, current limiter, Battery charger, AC voltage regulator and even as an adjustable current regulator. Down below is a video about how LM317T functions in a circuit. Adjustable Voltage Regulator LM317T functional demoCatalogLM317T PinoutLM317T FeaturesLM317T Schematic CircuitLM317T SpecificationsLM317T CAD ModelsLM317T ApplicationsLM317T PackageLM317T CircuitLM317T Functional EquivalentsLM317T Popularity by RegionLM317T Market Price AnalysisLM317T ManufacturerComponent DatasheetLM317T PinoutPin NumberPin NameDescriptionPin1AdjustThis pin adjusts the output voltagePin2Output Voltage (Vout)The regulated output voltage set by the adjust pin can be obtained from this pinPin3Input Voltage (Vin)The input voltage which has to be regulated is given to this pinLM317T FeaturesAccording to LM317T datasheet, it features:Output voltage range: 1.2 to 37 V Output current in excess of 1.5 A0.1% line and load regulation Current Limit Constant with Temperature100% Electrical Burn–In Eliminates the Need to Stock Many Voltages80dB Ripple RejectionLM317T Schematic CircuitCircuit schematic can help us to understand better about how a component or chip is used and worked in circuits. It’s a reference to make them work in an actual circuit. The following LM317T circuit schematic is a sample for reference.LM317T SpecificationsProduct AttributeAttribute ValueManufacturer:STMicroelectronicsProduct Category:Linear Voltage RegulatorsMounting Style:Through HolePackage / Case:TO-220-3Number of Outputs:1 OutputPolarity:PositiveOutput Voltage:1.2 V to 37 VOutput Current:1.5 AOutput Type:AdjustableInput Voltage MAX:40 VInput Voltage MIN:4.2 VMinimum Operating Temperature:0 CMaximum Operating Temperature:+ 125 CLoad Regulation:0.5 %Line Regulation:0.04 %/VSeries:LM317Packaging:TubeHeight:9.15 mmLength:10.4 mmOperating Temperature Range:0 C to + 125 CWidth:4.6 mmBrand:STMicroelectronicsPSRR / Ripple Rejection - Typ:80 dBProduct Type:Linear Voltage RegulatorsFactory Pack Quantity:1000Subcategory:PMIC - Power Management ICsUnit Weight:0.081130 ozLM317T CAD ModelsPart SymbolFootprint3D ModelLM317T ApplicationsLM317T voltage regulator is used in a wide range in circuits, the most common applications:Used for Positive voltage regulationsUsed in motor control circuitsCommonly used in Desktop PC, DVD and other consumer productsVariable power supplyCurrent limiting circuitsReverse polarity circuitsLM317T PackageLM317T CircuitThis is how a LM317T regulator would look when connected to a circuit so that it supplies a constant DC voltage output.In this circuit, we add a DC voltage supply to the VIN pin of the regulator. This is the pin which, again, receives incoming voltage which the chip will then regulate down. The voltage which enters this pin must be larger than the voltage it is feeding out. Remember, voltage regulators are just devices that regulate voltage down to a certain level. They do not and cannot create voltage on their own. Therefore, in order to a get a voltage, VOUT, VIN must be greater than VOUT. In this circuit, we want a regulated 5VDC as output. Therefore, VIN must be greater than 5 volts. Generally, with regulators, unless they are low drop out regulators, you want the input voltage to be about 2 volts higher. So therefore, since we want 5 volts as output, we will feed into this regulator 7 volts. Now that we've dealt with the input pin, we must now deal with the adjustable pin (Adj). This is the pin which allows us to adjust the voltage to the level we want. Since we want 5 volts to be output, we must calculate which value of R2 will yield an output of 5 volts. Using the formula for the output voltage, VOUT= 1.25V (1 + R2/R1). Being that R1=240Ω, our equation is now 5V= 1.25V (1 + R2/240Ω), so R2=720Ω. So with R2 being a value of 720Ω, the LM317 will output 5V if fed an input voltage greater than 5 volts. If you need to calculate output voltages or which resistor R2 value you would need for a circuit, see LM317 Calculator online. This can help you find the exact resistor value needed for a circuit. The last pin of the LM317 is the output pin. This is where the regulated voltage (in this case, 5 volts) will come out. To feed a circuit the regulated 5 volts, we just connect it to the output pin.LM317T Functional EquivalentsPart NumberDescriptionManufacturerLM317T#PBFPOWER CIRCUITSIC VREG 1.2 V-37 V ADJUSTABLE POSITIVE REGULATOR, PSFM3, PLASTIC, TO-220, 3 PIN, Adjustable Positive Single Output Standard RegulatorLinear TechnologyLM317T2POWER CIRCUITS1.2 V-37V ADJUSTABLE POSITIVE REGULATOR, PSFM3, PLASTIC, TO-220, 3 PINMotorola Mobility LLCLM317KCSPOWER CIRCUITS1.5-A, 40-V, adjustable linear voltage regulator 3-TO-220 0 to 125Texas InstrumentsLM317T/NOPBPOWER CIRCUITSIC VREG 1.2 V-37 V ADJUSTABLE POSITIVE REGULATOR, PSFM3, ROHS COMPLIANT, PLASTIC, TO-220, 3 PIN, Adjustable Positive Single Output Standard RegulatorNational Semiconductor CorporationLM317KCPOWER CIRCUITS3/4 Pin 1.5A Adjustable Positive Voltage Regulator 3-TO-220 0 to 125Texas InstrumentsLM317PPOWER CIRCUITS1.2 V to 37 V adjustable voltage regulatorsSTMicroelectronicsLM317BT4POWER CIRCUITS1.2 V-37V ADJUSTABLE POSITIVE REGULATOR, PSFM3, PLASTIC, TO-220, 3 PINMotorola Mobility LLCLM317BTPOWER CIRCUITS1.2 V-37V ADJUSTABLE POSITIVE REGULATOR, PSFM3, PLASTIC, TO-220, 3 PINON SemiconductorLM317BTGPOWER CIRCUITSLinear Voltage Regulator, 1.5 A, High PSRR, Adjustable, Positive TJ = -40° to +125°C, TO-220, SINGLE GAUGE, 3-LEAD, 50-TUBEON SemiconductorLM317KCE3POWER CIRCUITS3/4 Pin 1.5A Adjustable Positive Voltage Regulator 3-TO-220 0 to 125Texas InstrumentsLM317T Popularity by RegionLM317T Market Price AnalysisLM317T ManufacturerSTMicroelectronics (SGS-THOMSON, ST) group was established in 1987 by the merger of SGS Microelectronics in Italy and Thomson Semiconductor in France. In May 1998, SGS-THOMSON Microelectronics changed its company name to STMicroelectronics Co., Ltd. STMicroelectronics is one of the world’s largest semiconductor companies. It aims to be the market leader in multimedia application integration and power solutions. STMicroelectronics has the world’s most powerful product lineup, including dedicated products with high intellectual property rights. Products, there are also innovative products in many fields, such as discrete devices, high-performance microcontrollers, security smart card chips, and micro-electromechanical systems (MEMS) devices.Component DatasheetLM317T Datasheet 

L7805CV is a three terminal linear voltage regulator IC with a fixed output voltage of 5V which is useful in a wide range of applications. They are available in several IC Packages like TO-220, SOT-223, TO-263 and TO-3. Out of these, the TO-220 Package is the most commonly used one.This blog covers the pinout, features, parameter, circuits, equivalents and other information about L7805CV.This is a tutorial video on how to use L7805CV linear voltage regulator(11V-5V)CatalogL7805CV ParametersL7805CV Pin ConfigurationL7805CV CAD Models InformationL7805CV FeaturesL7805CV Electrical ChracteristicsL7805CV Schematic DiagramL7805CV Block DiagramL7805CV Application CircuitL7805CV Functional EquivalentsL7805CV Popularity by RegionL7805CV Market Price AnalysisL7805CV Design ConsiderationL7805CV ManufacturerComponent DatasheetFAQOrdering & QuantityL7805CV ParametersFixed Output Voltage Nom.5VAdjustable Output Voltage Min-Adjustable Output Voltage Max-Input Voltage Min10VInput Voltage Max35VProduct Range7805 Voltage RegulatorsOutput Current1.5AOutput TypeFixedLinear Regulator Case StyleTO-220No. of Pins3 PinsOperating Temperature Min0°C  Operating Temperature Max125°CAutomotive Qualification Standard-MSL MSL 1 - UnlimitedL7805CV Pin ConfigurationL7805CV CAD Models InformationPart Symbol   Footprint3D ModelL7805CV FeaturesOutput current in excess of 1.5AOutput voltage of 5V ·Internal thermal overload protectionOutput transition Safe-Area compensationThermal overload protectionShort circuit protectionL7805CV Electrical CharacteristicsTj=25℃ (Vi=10V, Io=0.5A, Ci=0.33μF, Co= 0.1μF unless otherwise specified)SymbolParameterConditionsMinMaxUnitVoOutput VoltageVin=20V; Io=500mA4.85.2V△VvLine Regulation7.5V≤Vin≤20V; Io=0.5A-50mV△ViLoad Regulation5.0mA≤Io≤1.5A;Vin=10V-100mVIqQuiescent CurrentVin=10V; Io=1.5A-6.0mA△q1Quiescent Current Change5.0mA≤Io≤1.0A;Vin=10V-0.5mA△q2Quiescent Current Change7V≤Vin≤25V; Io=500mA-1.3mAL7805CV Schematic DiagramThe internal circuit of L7805 three-terminal voltage regulator IC has the functions of overvoltage protection, overcurrent protection and overheat protection, which makes its performance very stable. Therefore, it can achieve more than 1A output current.The device also has a good temperature coefficient, so the product has a wide range of applications. Local regulation can be used to eliminate the influence of noise and solve the dispersion problem related to single-point regulation. The output voltage error accuracy is ±3% and ±5%.L7805CV Block Diagram L7805CV Application CircuitL7805CV Functional EquivalentsPart NumberDescriptionManufacturerLM7805A-220MR1POWER CIRCUITS5V FIXED POSITIVE REGULATOR, PSFM3, METAL, TO-220, 3 PINTT Electronics Power and Hybrid / Semelab LimitedLM7805A-220MPOWER CIRCUITSFixed Positive Standard Regulator, 5VPSFM3, METAL, TO-220, 3 PINTT Electronics ResistorsLM340T-5POWER CIRCUITSFixed Positive Standard Regulator, 5VBIPolar, PSFM3, PLASTIC, SFM-3Motorola Semiconductor ProductsUA7805CKCSPOWER CIRCUITS5V FIXED POSITIVE REGULATOR, PSFM3, ROHS COMPLIANT, PLASTIC, TO-220, 3 PINRochester Electronics LLCMC7805AECTPOWER CIRCUITSFixed Positive Standard Regulator, 5VBIPolar, TO-220, 3 PINFairchild Semiconductor CorporationMC7805ECTPOWER CIRCUITSFixed Positive Standard Regulator, 5VBIPolar, TO-220, 3 PINFairchild Semiconductor CorporationMC7805ACTBUPOWER CIRCUITSFixed Positive Standard Regulator, 5VBIPolar, PSFM3, TO-220, 3 PINFairchild Semiconductor CorporationMC7805CT-BP-HFPOWER CIRCUITSFixed Positive Standard Regulator,Micro Commercial ComponentsUPC7805AHF-AZPOWER CIRCUITSFixed Positive Standard Regulator, 5VBIPolar, PSFM3, ISOLATED, PLASTIC, TO-220, SIP-3NEC Electronics America IncKA7805TSTUPOWER CIRCUITSFixed Positive Standard Regulator, 5VPSFM3, TO-220, 3 PINFairchild Semiconductor Corporation L7805CV Popularity by RegionL7805CV Market Price AnalysisL7805CV Design ConsiderationThe L78 series of fixed voltage regulators are designed with thermal overload protection that shuts down the circuit when subjected to an excessive power overload condition, internal short-circuit protection that limits the maximum current the circuit will pass, and output transistor safe-area compensation that reduces the output shortcircuit current as the voltage across the pass transistor is increased. In many low current applications, compensation capacitors are not required. However, it is recommended that the regulator input be bypassed with a capacitor if the regulator is connected to the power supply filter with long lengths, or if the output load capacitance is large. An input bypass capacitor should be selected to provide good high-frequency characteristics to ensure stable operation under all load conditions. A 0.33 µF or larger tantalum, mylar or other capacitor having low internal impedance at high frequencies should be chosen. The bypass capacitor should be mounted with the shortest possible leads directly across the regulator's input terminals. Normally good construction techniques should be used to minimize ground loops and lead resistance drops since the regulator has no external sense lead.The addition of an operational amplifier allows adjustment to higher or intermediate values while retaining regulation characteristics. The minimum voltage obtained with the arrangement is 2V greater than the regulator voltage. The circuit of  a high current voltage regulator (the figure is shown below) can be modified to provide supply protection against short circuit by adding a short circuit sense resistor, RSC, and an additional PNP transistor. The current sensing PNP must be able to handle the short circuit current of the three terminal regulator. Therefore a four ampere plastic power transistor is specified.L7805CV ManufacturerSTmicroelectronics (ST) group was established in June 1988 as a result of the merger of SGS Microelectronics of Italy and Thomson Of France. In May 1998 SGS-Thomson Microelectronics changed its name to STmicroelectronics Limited.It is the world's largest manufacturer of dedicated analog chips and power conversion chips, the world's largest supplier of industrial semiconductors and set-top box chips, and a world leader in discrete components, mobile phone camera modules, and automotive integrated circuits.Component DatasheetL7805CV DatasheetFAQWhat is l7805cv?STMicroelectronics L7805CV | 3-Pin Linear Regulator Linear Regulators.What is the working principle of IC 7805?A voltage regulator IC maintains the output voltage at a constant value. 7805 IC, a member of 78xx series of fixed linear voltage regulators used to maintain such fluctuations, is a popular voltage regulator integrated circuit (IC). The xx in 78xx indicates the output voltage it provides.How do I test a 7805 with a multimeter?Turn on the DC power supply and adjust the output voltage of about 8V or slightly larger. Or alternatively, you can use a battery 9V-12V as voltage source. Look at the voltmeter panel when you set the voltage. Prepare a DC voltmeter reading on voltage range 50V to measure the output voltage of the IC 7805.How does 7805 regulate voltage?For 7805 IC, it is +5V DC regulated power supply. This regulator IC also adds a provision for a heat sink. The input voltage to this voltage regulator can be up to 35V, and this IC can give a constant 5V for any value of input less than or equal to 35V which is the threshold limit. 

The L7812CV is a three-terminal positive voltage regulator. This regulator can provide local on-card regulation, eliminating the distribution problems associated with single point regulation.This blog will cover detailed information about L7812CV including pinout, features, applications, circuits, CAD models and so on.CatalogL7812CV Pinout ConfigurationL7812CV PackageL7812CV CAD ModelsL7812CV FeaturesL7812CV Electrical ChracteristicsL7812CV Schematic DiagramL7812CV ApplicationsL7812CV Typical ApplicationL7812CV Functional EquivalentsL7812CV Design ConsiderationL7812CV Popularity by RegionL7812CV Market Price AnalysisL7812CV ManufacturerComponent DatasheetFAQOrdering & QuantityL7812CV Pinout ConfigurationL7812CV PackageL7812CV CAD ModelsPart SymbolFootprint3D ModelL7812CV FeaturesOutput current up to 1.5 AOutput voltages of 5; 6; 8; 8.5; 9; 12; 15; 18; 24 VThermal overload protectionShort circuit protectionOutput transition SOA protection2 % output voltage tolerance (A version)Guaranteed in extended temperature range (A version)L7812CV Electrical CharacteristicsL7812CV Schematic Diagram L7812CV ApplicationsConstant +12V output regulator to power microcontrollers and sensors in most of the projectsAdjustable Output RegulatorCurrent Limiter for certain applicationsRegulated Dual SupplyOutput Polarity-Reversal-Protection CircuitL7812CV Typical ApplicationL7812CV Functional EquivalentsPart NumberDescriptionManufacturerAN7812POWER CIRCUITSFixed Positive Standard Regulator, 12VBIPolar, PSFM3, TO-220AB, 3 PINPanasonic Electronic ComponentsML7812FAPOWER CIRCUITSFixed Positive Standard Regulator, 12VBIPolar, PSFM3, TO-220F, 3 PINMicro Electronics CorporationIP140AIG-15POWER CIRCUITS15V FIXED POSITIVE REGULATOR, SFM3, TO-257, 3 PINTT Electronics Power and Hybrid / Semelab LimitedSG7815AIGPOWER CIRCUITSFixed Positive Standard Regulator, 15VBIPolar, CSFM3, HERMETIC SEALED, TO-257, 3 PINLinfinity MicroelectronicsSG7812IGPOWER CIRCUITSFixed Positive Standard Regulator, 12VBIPolar, HERMETIC SEALED, TO-257, 3 PINMicrosemi CorporationMC7815AECTBUPOWER CIRCUITS15V FIXED POSITIVE REGULATOR, PSFM3, ROHS COMPLIANT, TO-220, 3 PINRochester Electronics LLCKA7812AEPOWER CIRCUITSFixed Positive Standard Regulator, 12VBIPolar, TO-220, 3 PINFairchild Semiconductor CorporationKA7812ATUPOWER CIRCUITSFixed Positive Standard Regulator, 12VBIPolar, PSFM3, TO-220, 3 PINFairchild Semiconductor CorporationMC7812ACTGPOWER CIRCUITSLinear Voltage Regulator, 1 A, 5 to 24 V, Positive Vout: 12.0 V; TJ = 0°C to +125°C, TO-220, SINGLE GAUGE, 3-LEAD, 50-TUBEON SemiconductorMC7812CTGPOWER CIRCUITSLinear Voltage Regulator, 1 A, 5 to 24 V, Positive Vout: 12.0 V; TJ = 0°C to +125°C, TO-220, SINGLE GAUGE, 3-LEAD, 50-TUBEON SemiconductorL7812CV Design ConsiderationThe L78 series of fixed voltage regulators are designed with thermal overload protection that shuts down the circuit when subjected to an excessive power overload condition, internal short-circuit protection that limits the maximum current the circuit will pass, and output transistor safe-area compensation that reduces the output shortcircuit current as the voltage across the pass transistor is increased. In many low current applications, compensation capacitors are not required. However, it is recommended that the regulator input be bypassed with capacitor if the regulator is connected to the power supply filter with long lengths, or if the output load capacitance is large. An input bypass capacitor should be selected to provide good high frequency characteristics to insure stable operation under all load conditions. A 0.33 µF or larger tantalum, mylar or other capacitor having low internal impedance at high frequencies should be chosen. The bypass capacitor should be mounted with the shortest possible leads directly across the regulators input terminals. Normally good construction techniques should be used to minimize ground loops and lead resistance drops since the regulator has no external sense lead.The addition of an operational amplifier allows adjustment to higher or intermediate values while retaining regulation characteristics. The minimum voltage obtained with the arrangement is 2V greater than the regulator voltage. The circuit of  a high current voltage regulator (the figure shown below) can be modified to provide supply protection against short circuit by adding a short circuit sense resistor, RSC, and an additional PNP transistor. The current sensing PNP must be able to handle the short circuit current of the three terminal regulator. Therefore a four ampere plastic power transistor is specified.L7812CV Popularity by RegionL7812CV Market Price AnalysisL7812CV ManufacturerSTmicroelectronics (ST) group was established in June 1988 as a result of the merger of SGS Microelectronics of Italy and Thomson Of France. In May 1998 SGS-Thomson Microelectronics changed its name to STmicroelectronics Limited.It is the world's largest manufacturer of dedicated analog chips and power conversion chips, the world's largest supplier of industrial semiconductors and set-top box chips, and a world leader in discrete components, mobile phone camera modules, and automotive integrated circuits.Component DatasheetL7812CV DatasheetFAQWhat is l7812cv?The L7812CV is a three-terminal positive voltage regulator. This regulator can provide local on-card regulation, eliminating the distribution problems associated with single point regulation.Can ka7812 and l7812cv be used in common?KA7812 is a FAIRCHILD product with a maximum output current of 1A, and L7812CV is a ST product with a maximum output current of 1.5A. Therefore, when the output current requirement does not exceed 1A, the two can be used in common. If the output current is between 1A and 1.5A, only L7812CV can be used.How to wire the L7812cv regulator IC？If it is packaged as TO-220, the identification method is to face the side with the words to yourself, and the pins downwards. Count 123 from left to right. Pin 1 is input, pin 2 is ground, and pin 3 is output. 78 Series of voltage regulator chips must be DC input, if the input and output are reversed, the chip will be burnt. In addition, the input DC voltage should not be too high.What is the difference between LM7812CV and LM7812CT? Which output current is higher?LM7812CV and LM7812CT are both +12V three-terminal regulators, and the maximum output current is 1A. The difference is that their manufacturers are different.Can 7812cv and 78m12 be replaced with each other?The maximum output current of 7812 is generally 1A (a few manufacturers is 1.5A), while the maximum output current of 78M12 is 0.5A, so 7812 can replace 78M12, but 78M12 may not be able to replace 7812 (only when the load current does not exceed 0.5A) Can replace each other only under circumstances).What is the output voltage of the integrated three-terminal regulator L7812?12V. The output voltage of the three-terminal regulator integrated circuit is the output voltage. For example, 7805 outputs 5V, 7815 outputs 15V. The maximum output current of 78 series stabilized integrated circuits is generally 1.5A.What is the range of l7812 input current?The highest input voltage of 7812 is 35V. The maximum input current is 1A, but its best working voltage is 15V~17V, especially when the load current is large. Because this is a linear regulator, if the input and output voltage difference and output current are both large at the same time, it will cause excessive power consumption and severe heat generation.