The Kynix Components

SN74HC595N Product OverviewThe SN74HC595N is a simple 8-bit shift register IC. Simply put, this shift register is a device that allows additional inputs or outputs to be added to a microcontroller by converting data between parallel and serial formats. Your chosen microprocessor is able to communicate with the The SN74HC595N using serial information then gathers or outputs information in a parallel (multi-pin) format. Essentially it takes 8 bits from the serial input and then outputs them to 8 pins.This small DIP packaged IC contains an 8-bit, serial-in parallel-out shift register that feeds an 8-bit D-type storage register with parallel 3-state outputs.Note: This is a drop-in replacement for the 74HC595 shift register IC and should function just fine in any application the previous version could.  How 74HC595 works?  CatalogSN74HC595N Product Overview74HC595N Pinout Diagram74HC595N CAD ModelTechnical Specifications74HC595N FeaturesApplicationsAlternatives Shift Registers74HC595 Shift Register Working PrincipleHow to use 74HC595 Shift Register?Using WarningsComponent DatasheetFAQ74HC595N Pinout DiagramIf you look for 595 series shift registers, it has many variants and models available in the market. But all work the same way. They have the same pin configuration, electrical features, pinout diagram, and working principle. But this tutorial will be more focused on SN74HC595N by texas instruments.Now, look at the pinout diagram. The tilt sign ~ shows that these pins operate on active low signals or on negative logic. We will look into the details of negative logic later on in this tutorial.Related to output pins, because it is an 8-bit shift register. SN74HC595N  has eight output pins from Q0-Q7.74HC595 Pinout Diagram  74HC595N CAD Model74HC595 CAD Model Technical SpecificationsCase/PackageDIPMountThrough HoleNumber of Pins16Technical Frequency100 MHzLogic FunctionShift RegisterMax Operating Temperature125 °CMax Supply Voltage6 VMin Operating Temperature-40 °CMin Supply Voltage2 VNumber of Bits8Number of Circuits8Number of Elements1Number of Gates1Operating Supply Voltage5 VOutput Voltage6 VPower Dissipation750 mWPropagation Delay265 nsCompliance Lead FreeLead FreeRadiation HardeningNoREACH SVHCNo SVHCRoHSCompliant 74HC595N FeaturesIt is a shift register with 8-bit serial input and 8-bit serial or 3-state parallel outputs.The operating voltage of this IC is from 2V to 6V.The output voltage is equal to the operating voltage of this IC .It is based on CMOS logic and therefore consumes a very low power of 80uA.The output source/sink current is 35mA.It has a characteristic of high noise immunity.It can be easily cascaded through pin 9 with more IC to get more outputs.The maximum clock frequency is 25Mhz @4.5V.Schmitt trigger action is provided on all inputs. ApplicationsApplicationNetwork SwitchesPower InfrastructureLED DisplaysServersAlternatives Shift RegistersS.No:NameType140354-Bit Parallel in Parallel out Shift Register274LS379Quad Parallel Shift Register340144 Bit static shift register474LS1668 Bit Shift Register574LS3238 Bit Shift/Storage Register674LS164S/P Shift Register74015Dual 4 Bit Static Register874LS2998 Bit Shift/Storage Register 74HC595 Shift Register Working PrincipleAs mentioned earlier, the internally 74HC595 shift register consists of two registers such as shift register and storage register. Both are 8-bit wide.  The first one is responsible to accept data input on every positive edge of the clock and it keeps receiving data. But data from the shift register transfer to the storage register only when we apply an active high signal to latch input pin.Shift Register Working Principle How to use 74HC595 Shift Register? It has eight outputs and 3 input pins which include a data pin, storage resistor clock pin, and shift register clock pin. Connect pin8 to ground and pin16 to +5V voltage supply.The output enable pin (~OE) should be grounded to enable the output pins of the shift register. The master reset pin will clear the memory of a shift register if it is applied with a low signal. That’s why it should be kept high.When the positive edge transition occurs on pin 11, the shift register will accept the inputs applied on the data line.The outputs of the storage register are connected to the input pins of the D-latch/storage resistor.These inputs are updated on the latch output when a positive edge transition occurs at pin 12.Most importantly, If you need to cascade multiple IC’s together then pin 9 is connected to the data pin of another shift register IC. Using WarningsNote: Please check their parameters and pin configuration before replacing them in your circuit. Component Datasheet74HC595 Datasheet FAQ1. How does a 8 bit shift register work?The SN74HC595N is a simple 8-bit shift register IC. Simply put, this shift register is a device that allows additional inputs or outputs to be added to a microcontroller by converting data between parallel and serial formats. ... Essentially it takes 8 bits from the serial input and then outputs them to 8 pins. 2. What can I do with a 74HC595?74HC595 is a shift register which works on Serial IN Parallel OUT protocol. It receives data serially from the microcontroller and then sends out this data through parallel pins. We can increase our output pins by 8 using the single chip. We can also connect more than 1 shift register in parallel. 3. How do you program a 74HC595?First, connect the Serial Input Pin of 74HC595 Shift Register to Pin 4 of Arduino. Then connect the clock and latch pins i.e. pins 11 and 12 of 74HC595 to pins 6 and 5 of Arduino respectively. Now, connect 8 LEDs with individual current limiting 1KΩ Resistors to the 8 outpu    

Introduction The LM386 is a power amplifier designed for use in low voltage consumer applications. The gain is internally set to 20 to keep the external part count low, but the addition of an external resistor and capacitor between pins 1 and 8 will increase the gain to any value from 20 to 200. The inputs are ground referenced while the output automatically biases to one-half the supply voltage. The quiescent power drain is only 24 mW when operating from a 6 V supply, making the LM386 ideal for battery operation.CatalogIntroductionCatalogI How does LM386 Internal Circuit Work？1.1 Input stage1.2 Voltage Amplifier stage1.3 Output stage1.4 Feedback NetworkII LM386 Application Circuit2.1 Circuit of Infrared alarm2.2 Circuit of Automobile Voice Horn2.3 Circuit of Microcomputer Stereo Power AmplifierFAQOrdering & QuantityI How does LM386 Internal Circuit Work？The principle of the LM386 internal circuit is shown in the figure. The internal circuit is based on a typical audio power amplifier configuration, often referred to as Lin topology. LM386 internal circuit is divided into input stage, voltage amplifier stage  (VAS), output stage (OPS), and feedback network.Figure 1. LM386 Internal Circuit1.1 Input stageThe first module is the PNP emitter follower amplifier  (Q1, Q3). It sets the input impedance and defines the DC operating point to raise the input voltage from the ground, so the circuit will accept the negative input signal to - 0.4V. Both 50K input resistors  (R 1, R 3) have established paths to the base current ground, and the inputs need to be coupled to avoid interfering with the internal bias. So the input impedance is determined by these resistors and is set to 50K.Analysis of voltage gain: The gain of the long-tail pair (Q2, Q4) of the differential amplifier is regulated by two gain setting resistors 1.35k +150 Ω (R5 + R5). External pins 1 and 8 can adjust the gain from 20 (minimum) to 200 (maximum).The voltage gain can be calculated under static conditions (without input signal applied) as follows:Figure 2. Analysis of LM386 voltage gainThe voltage (vdiff) at both ends of R4 and R5 is only the differential input voltage  (VIN) because the base-emitter voltage drop of PNP transistors (Q1, Q2, Q3, and Q4) on both sides of LTP is the same. The current mirror formed by Q5 and Q6 produces equal current on both sides of the LTP. The current is marked as "I".Due to the current mirror, the current intensity through R8 is equal to 2I, while ignoring the current (i7) through the two 15K resistors (R6, R7). these two resistors have a larger impedance compared to the rest of the circuit, thereby:In the figure above, it is easy to see that if i7 = 0, then:∴The formula can also be rewritten in a more general way:Z 1-5 and Z 1-8 are the impedance between the corresponding pins.Without any external components, the gain is GV = 2x15k / (150 + 1350) = 20 (26 dB).Use a capacitor (or shortcut) between pin 1 and 8, then its gain of GV = 2x15k / 150 = 200 (46db).1.2 Voltage Amplifier stageThe common emitter amplifier (Q7) amplifies the low amplitude input signal to the appropriate level directly coupled to the output stage.1.3 Output stageIt is a class AB power amplifier, that is, push-pull configuration. Each transistor amplifies its corresponding half-wave. Because the gain difference between Q9 and Q10 of PNP transistors is in a compound PNP transistor configuration, β TOTAL =β Q9 X β Q10.Divider compensation: Diodes D 1 and D 2 are used to compensate for cross distortion.In fact, in a push-pull topology, the transistor does not start conducting until the input signal begins to exceed its forward voltage (Vbe). The forward voltage (VBE) is the voltage at the base emitter junction (usually about ±0.6 V).In order to offset the minimum conduction limit (Vbe) of the transistors, they need to be biased so that their idling voltage will never be lower than the forward voltage (Vbe). A certain amount of current (called a bias current) will continuously feed into the base of the transistor to ensure that they maintain the sacrificial efficiency of conduction.It is proved that using diodes is one of the best solutions. It provides a temperature-dependent pressure drop. And by matching the thermal coefficient to the transistor, the bias current can be kept fairly stable. If accurate heat tracing is required, install the diodes on the same heat sink as the power transistor. Since one diode is usually not enough, amplifiers usually use multiple diode junctions1.4 Feedback NetworkNegative feedback is applied from the output to the emitter Q4 via the resistor R8. The function of the DC feedback is to stabilize the output DC bias voltage to half of the supply voltage.The functions of DC feedback are as follows: If for some reason VO increases, the corresponding current increment will flow through R8 and into the emitter of Q4. Therefore, the increase of collector current of Q4 leads to the positive increase of base voltage of Q7. This leads to an increase in the collector current of Q7, which reduces the base voltage of Q7, thus reducing Vo.II LM386 Application Circuit 2.1 Circuit of Infrared alarmFigure 3. Circuit of Infrared alarmFigure 3 shows the circuit of the infrared alarm. The circuit is composed of an AND gate circuit, a monostable delay circuit, a four-way infrared transmitting and receiving circuit, a trigger and a two-color light-emitting circuit, and an audio alarm circuit. Four pairs of warning lines for transmission and reception are composed of HF1～HF4 (infrared light-emitting diodes) and BG1～BG4 (infrared receiving pairing tubes). If someone crosses the warning line and the infrared beam is blocked, the corresponding matching tube will be cut off. And the input of the corresponding NAND gate is high level. It makes the trigger terminal pin2 of IC3 (555) obtain a negative differential pulse, that is, the output terminal of the AND gate composed of D1～D4. Therefore, the 555 is set, and the high level is output from pin 3 which makes BG5 saturated and turned on. The chip IC4 (KD-9562) is powered on and an alarm sound is given. The delay width of the IC3 monostable circuit td=1.1Rw1R3 determines the sound time. The delay alarm time corresponding to the parameters in the figure is about 100 seconds. At the same time, the corresponding time can be changed by changing the value of W and C according to the specific situation. The voltage stabilizing tube DW adopts 2cw7 or 2cw10, and the voltage range is about 3V to protect the music integration KD-9562, so as to prevent it from burning due to over-voltage (high voltage). The chip KD-9562 is an eight analog sound integrated circuit, which can select the corresponding music according to the use situation and purpose. LM386 is a single power audio power amplifier integrated circuit, which is used to expand the range of alarm sound. F1-1～F1-6, F2-1～F2-6 use six inverter CD4069. Two-color light-emitting diodes LED1～LED4 adopt 2EF303. Under normal conditions, they emit green light, and when someone crosses the warning line, they send out a red warning light.2.2 Circuit of Automobile Voice Horn Figure 4. Circuit of Automobile Voice HornThe left side of the dotted line in Figure 4 is the original circuit diagram of the vehicle's electric horn. SL is the electric horn button switch on the steering wheel. S2 is a newly added SPDT Switch, which is used for switching between the electric horn and voice horn of the original vehicle. When the switch S2 is set to "2", press the switch Sl, the capacitor Cl is charged, the transistors VTl, VT2 turn on, the relay Jl pulls in. J1-1 is closed and held for 15 seconds to supply power to the circuit. ICl is a dedicated voice integrated circuit HL-169A. Since its working time is 2.8 seconds, the self-excited multivibrator is composed of transistors VT3 and VT4. Every 3 seconds, a high level is output as a trigger signal, so that ICl outputs a voice signal every 3 seconds, and sends it to IC2 for audio power amplification, and the speaker BL emits voice.2.3 Circuit of Microcomputer Stereo Power Amplifier Because the audio signal amplitude of the "line output" of the sound card is too large, the LM386 can be driven to push the speaker. In addition, due to the interference of video signal when playing VCD, it is not good to connect the VCD according to the typical circuit, so it is necessary to add some components and debug the component values. The schematic diagram is shown in Figure 5.Figure 5. Circuit of Microcomputer Stereo Power AmplifierLM386 has two input terminals, 3 pin in-phase input and 2 pin inverting input. The input signal can be input from any end and the other input terminal can be grounded. The input end is connected with capacitor C4 in order to filter out the video interference when playing VCD. The value can be increased appropriately, but it can be used with or without C4 when playing the CD. The pin1 and pin 8 are gain control terminals, which are composed of C2 and W2. The smaller the resistance, the higher the gain. It is more appropriate to adjust the gain of W2 to about 150Ω. If the gain is too high, it will easily cause self-excitation. Pin 7 is connected to a 10μ capacitor. The high frequency component attenuation circuit is composed of R2 and C6 to eliminate the crash sound from the loudspeaker. The capacity of C6 can be adjusted according to the actual effect. Pin 6 is connected to the ground with a 0.1μ capacitor, which acts as a filter to eliminate the static hum of the amplifier. Pin 5 is connected to the coupling capacitor C3. If only one cone speaker is connected to one channel, C3 capacity should not exceed 470 μ, otherwise, the loudspeaker will be blocked when playing low music. If high-frequency and low-frequency crossover technology is adopted, the capacity of C3 can be increased to make the bass fully reflected. W1 is used to adjust the output volume, which is particularly convenient when playing games or listening to CDs.FAQHow much gain is the LM386 internally set to?20What is the LM386 internal circuit often referred to as?Lin topologyWhat are the two input terminals of LM386?3 pin in-phase input and 2 pin inverting inputHow does an LM386 work?The Lm386 integrated chip is a low power audio frequency amplifier, which uses low level power supply like batteries in electronic circuits. It is designed as 8 pin mini DIP package. This provides voltage amplification of 20. By using external parts voltage gain can be raised up to 200.Is lm386 an op amp?The LM386 is a type of operational amplifier (Op-Amp). In an amplifier circuit, the LM386 takes an audio input signal and increases its potential anywhere from 20 to 200 times. That amplification is what's known as the voltage gain.What is lm386 IC?The LM386 is an integrated circuit containing a low voltage audio power amplifier. It is suitable for battery-powered devices such as radios, guitar amplifiers, and hobby electronics projects.How do you calculate lm386 gain?Voltage Gain Analysis:Without any external components, it has a gain of Gv = 2x15K/(150+1350) = 20 (26 dB).With a capacitor (or shortcutting) between pins 1 and 8 , it has a gain of Gv = 2x15K/150 =200 (46dB).Which IC is used in audio amplifier?The IC LM386 is a low-power audio amplifier, and it utilizes low power supply like batteries in electrical and electronic circuits. This IC is available in the package of mini 8-pin DIP.What are some projects that use the LM386 audio amplifier circuit?LM 386 is an integrated class AB amp and is good for beginners small audio amplifier applications…for example in a RF receiver,small Stereo system,cheap low voltage amplifier etc…drawbacks is that it cannot handle much power and hence creates distortion when you crank up the volume too much.. So other ICs are used in practical.How to make an LM386 audio amplifier circuit?

The ADXL345 is a small, low power, full 3-axis MEMS accelerometer module with both I2C and SPI interfaces. The ADXL345 board features a 3.3V onboard voltage regulator and a level shifter, making it easy to interface with 5V microcontrollers such as Arduino. In today's blog, we will walk you in the detailed introduction of the ADXL345 accelerometer module.This is a video introducing how to wire ADXL345 with Arduino.CatalogADXL345 Module IntroductionADXL345 Module Pin ConfigurationADXL345 Module FeaturesADXL345 Module AlternativesHow to use ADXL345 ModuleADXL345 Module ApplicationsComponent DatasheetFAQADXL345 Module IntroductionThe ADXL345 Accelerometer Module consists of the ADXL345 Accelerometer IC, Voltage Regulator IC, Level Shifter IC, resistors and capacitors in the integrated circuit. Different manufacturers use a different voltage regulator IC.ADXL345 IC from Analog Devices is the core component of this module. The ADXL345 is a small, thin, low power, complete 3-axis accelerometer with signal conditioned voltage outputs. The product measures acceleration with a minimum full-scale range of ±16g.ADXL345 Module Pin ConfigurationADXL345 Accelerometer Module Pin NamePin ConfigurationGNDGround PinVCCPower Supply pin (3V to 6V)CSChip Select PinINT1Interrupt 1 OutputINT2Interrupt 2 OutputSDOSerial Data OutputSDASerial Data Input & OutputSCLSerial Communication Clock ADXL345 Module Features3V-6V DC Supply VoltageOn-board LDO Voltage regulatorBuilt-in Voltage level convertor (MOSFET based)It can be interface with 3.3V or 5V Microcontroller.Ultra-Low Power: 40uA in measurement mode, 0.1uA in standby@ 2.5VTap/Double Tap DetectionFree-Fall DetectionSPI and I2C interfacesMeasuring Range: ±16gMeasuring Values (-16g to +16g):X: -235 to +270Y: -240 to +260Z: -240 to +270 ADXL345 Module AlternativesAlternate Sensor Modules: ADXL335 Accelerometer Module, HMC5883L Magnetometer Module, Soil Moisture SensorRelated Components: ADXL345, Resistors, Voltage Regulator IC, Level Shifter ICHow to use ADXL345 ModuleADXL345 Accelerometer module is composed of 8 pins. It is very easy to use the ADXL345 module with a microcontroller. Connect VCC and GND pins to 5V and GND pins of Microcontroller. Also, connect SCL and SDA pins to the SCL and SDA pins of Arduino.The basic structure of the accelerometer is composed of fixed plates and moving plates. When the acceleration is applied to the axis, the capacitance between fixed plates and moving plates is modified. This results in a sensor output voltage amplitude, which is proportional to the acceleration.ADXL345 Module ApplicationsCost-sensitive, low power, motion- and tilt-sensing applicationsMobile devicesGaming systemsDisk drive protectionImage stabilizationSports and health devicesComponent DatasheetADXL345 Accelerometer DatasheetFAQWhat is the ADXL345?MEMS accelerometer module What is the voltage regulator on the ADXL345 board?3.3V How many pins is the ADXL345 Accelerometer module composed of?8 pins What is the basic structure of the accelerometer composed of?Fixed plates and moving plates

 In today's blog, I'll introduce LM431 systematically from pinout, features, to its manufacturer, datasheet, and so on.The LM431 is a 3-terminal adjustable shunt regulator with ensured temperature stability over the entire temperature range of operation. The output voltage may be set at any level greater than 2.5 V (VREF) up to 36 V merely by selecting two external resistors that act as a voltage divided network. Due to the sharp turnon characteristics, this device is an excellent replacement for many Zener diode applications. The LM431 is available in space-saving SOIC-8, SOT-23, and TO-92  packages.LM431 adj precision zener shunt regulator component wired as low 9V battery indicator circuitCatalogLM431 Pin Configuration and FunctionLM431 FeaturesLM431 AlternativesLM431 Functional EquivalentsLM431 Package OutlineLM431 ApplicationsHow to Use LM431LM431 ManufacturerComponent DatasheetFAQOrdering & QuantityLM431 Pin Configuration and FunctionLM431 FeaturesAverage Temperature Coefficient of 50 ppm/°CTemperature Compensated for Operation Over the Full Temperature RangeProgrammable Output VoltageFast Turnon ResponseLow-Output NoiseLow-Dynamic Output ImpedanceAvailable in Space-Saving SOIC-8.  SOT-23, and TO-92  PackagesLM431 AlternativesLM432, NJM2820, NJM2821, NJM2822, ZXRE060LM431 Functional EquivalentsPart NumberDescriptionManufacturerLM431BIZPOWER CIRCUITS1-OUTPUT TWO TERM VOLTAGE REFERENCE, 2.495V, PBCY3, PLASTIC, TO-92, 3 PINTexas InstrumentsLM431AIZXAPOWER CIRCUITSTwo Terminal Voltage Reference, 1 Output, 2.5V, Trim/Adjustable, PBCY3, TO-92, 3 PINRochester Electronics LLCLM431BIZXAPOWER CIRCUITSTwo Terminal Voltage Reference, 1 Output, 2.495V, Trim/Adjustable, PBCY3, TO-92, 3 PINRochester Electronics LLCLM431BCZXAPOWER CIRCUITSAdjustable/2.5 V, 1% Tolerance Shunt Regulator, 3 LD, TO92, MOLDED 0.200 IN LINE SPACING LD FORM, 2000/AMMOFairchild Semiconductor CorporationLM431ACZPOWER CIRCUITSIC 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 2.495 V, PBCY3, PLASTIC, TO-92, 3 PIN, Voltage ReferenceNational Semiconductor CorporationLM431AIZPOWER CIRCUITSAdjustable/2.5 V, 2% Tolerance Shunt Regulator, 3LD, TO92, JEDEC TO-92 COMPLIANT STRAIGHT LEAD CONFIGURATION (OLD TO92AM3), 10000/BULKFairchild Semiconductor CorporationLM431AIZ/NOPBPOWER CIRCUITS2%, 1%, or 0.5% accuracy, adjustable precision Zener shunt regulator 3-TO-92 -40 to 85Texas InstrumentsLM431CCZPOWER CIRCUITSIC 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 2.5 V, PBCY3, PLASTIC, TO-92, 3 PIN, Voltage ReferenceNational Semiconductor CorporationLM431ACZ/NOPBPOWER CIRCUITS2%, 1%, or 0.5% accuracy, adjustable precision Zener shunt regulator 3-TO-92 0 to 70Texas InstrumentsLM431CIZ/LFT1POWER CIRCUITSAdjustable Precision Zener Shunt Regulator 3-TO-92Texas InstrumentsLM431 Package OutlineSOIC-8LM431(SOIC-8 Package)SOT-23LM431(SOT-23 Package)TO-92LM431(TO-92 Package)LM431 ApplicationsAdjustable Voltage or Current Linear and Switching Power SuppliesVoltage MonitoringCurrent Sourse and Sink CircuitsCircuits Requiring Precision ReferencesZener Diode ReplacementsHow to Use LM431?Before going for the application circuit of LM431, let us first understand the internal working of the device and for that consider the functional diagram of the device as shown below.   In the LM431 functional diagram, we have three main devices namely Op-amp, NPN transistor, and +2.5V voltage source. Based on the working of the op-amp, the output voltage Vo/p will be positive only when Vref >+2.5V because the voltage at inverting terminal of the op-amp is +2.5V. Now let us consider a simple application circuit for the device as shown below:Here reference voltage (Vref) is the voltage at the non-inverting terminal of the op-amp and this voltage determines whether the op-amp outputs positive voltage or not. Also, Vref is the voltage at the midpoint voltage divider network formed by the two resistors R2 and R3. Based on the concept of voltage division we have Vref = Vo(R3/R2+R3). By exchanging terms we have Vo = Vref(R2+R3/R3) = Vref(1+R2/R3) = 2.5(1+R2/R3). Based on the equation you can adjust two resistor values in the circuit to get the desired output voltage.Working Principle of the Circuit: The op-amp here keeps comparing the voltage at the non-inverting terminal which is Vref (which is directly related to output voltage) with +2.5V (the voltage connected to inverting terminal by default) and depending on the result the op-amp triggers the transistor to draw current from the source V1. Whenever the output crosses the threshold (threshold is the value determined by R2 and R3 value) the op-amp get feedback via Vref and it drives the transistor ON. When the transistor turns ON the device draws current and because of this current drawing a voltage drop appears across R1 resistor which is in series with voltage source V1.Because of this drop, we have Vo = V1 – (R1) * (Ic). Here Ic is the current drawn by the transistor. Also, the current draw by op-amp and resistor network is neglected for easy explanation.The op-amp turns ON transistor up to a point where it’s current drawing leads to lowering Vo (by R1 voltage drop) from V1 to Vref(1+R2/R3).So in the final result, Vo will always be adjusted to float near the measured value by op-amp setup (or LM431).  In a similar way, we can setup other application circuits.LM431 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 DatasheetLM431 DatasheetFAQWhat is the LM431?3 terminal adjustable shunt regulator. What is the output voltage of the LM431?2.5 V (VREF) up to 36 V What are the derivatives of LM431?TL432, ATL431, KA431, LM431, TS431, 142ЕН19 and others.

The MAX7219 is an IC designed to control 8x8 LED MATRIX. The IC is a serial input common-cathode (Common Negative) display driver that interfaces microprocessors (or microcontrollers) to 7-segment numeric LED displays of up to 8 digits, bar-graph displays, or 64 individual LEDs. This blog is an overview of MAX7219 covering its pinout, features, where and how to use this device, etc.Arduino 7 Segment Display Max7219 TutorialCatalogMAX7219 Pin ConfigurationMAX7219 FeaturesMAX7219 EquivalentWhere to Use MAX7219 ICHow to Use MAX7219 ICMAX7219 ApplicationsMAX7219 DimensionsComponent DatasheetFAQ MAX7219 Pin ConfigurationMAX7219MAX7219 Pinout Pin NumberDescriptionCOMMON CATHODE OF DISPLAY SEGMENTS2DIG0- Common ground for all eight segments of DIGIT011DIG1- Common ground for all eight segments of DIGIT16DIG2- Common ground for all eight segments of DIGIT27DIG3- Common ground for all eight segments of DIGIT33DIG4- Common ground for all eight segments of DIGIT410DIG5- Common ground for all eight segments of DIGIT55DIG6- Common ground for all eight segments of DIGIT68DIG7- Common ground for all eight segments of DIGIT7SHARED TERMINALS4GND19V+- Power SupplySHARED SEGMENT TERMINAL OF ALL EIGHT DIGITS14SEG A – SEGEMTENT A  of all DIGITS16SEG B – SEGEMTENT B  of all DIGITS20SEG C – SEGEMTENT C  of all DIGITS23SEG D – SEGEMTENT D  of all DIGITS21SEG E – SEGEMTENT E  of all DIGITS15SEG F – SEGEMTENT F  of all DIGITS17SEG G – SEGEMTENT G  of all DIGITS22SEG DP – SEGEMTENT DOT of all DIGITSFUNCTION PINS1DIN -  Serial Data Input Pin12LOAD(CS) – Chip Select or Data shift pin13CLK -  Clock Pin24DOUT -  Pin used to Connect Second chip serially18ISET -  current output adjust pin MAX7219 FeaturesOperating voltage range: +4.0 to +5.5VRecommended operating voltage: +5VMaximum supply voltage: 6VMaximum current allowed to draw through each segment pin: 100mAMaximum current allowed to  through each DIGIT ground pin: 500mALow power consumptionData-to-Segment Delay Time: 2.2mSecOperating temperature: 0°C  to +70°CStorage Temperature: -65°C  to +150°CMAX7219 Equivalent74HC595Where to Use MAX7219 IC1.This IC is basically used when you want to convert serial data to parallel data.2.The chip is used to reduce the I/O pin use of the controller or processor.3. Used for controlling 64 LEDs using only 3 pins4. Preferred when controller 7 Segment Displays. The chip can control up to 8 DIGIT.5. Can be used to control more display segments by connecting more chips in serial.How to Use MAX7219 ICMAX7219  is used in a similar manner to any shift register. First we send the serial data to the chip bit by bit. Once all the data is sent, we tell the chip to move the serial data to the output by enabling the CS pin. The step-by-step working procedure is as follows.First connect the DIN, CS and CLK pins. These three pins are very important for controlling the chip.Next is selecting the resistance for the ISET pin. As we know, there is no standard market parameter for segment displays. They have different voltage and current settings. To drive the display without error, we will use the following table to select the appropriate resistor. Forward voltageISeg1.5V2.0V2.5V3.0V3.5V40mA12.2kΩ11.8kΩ11.0kΩ10.6kΩ9.69kΩ30mA17.8kΩ17.1kΩ15.8kΩ15.0kΩ14.0kΩ20mA29.8kΩ28.0kΩ25.9kΩ24.5kΩ22.6kΩ10mA66.7kΩ63.7kΩ59.3kΩ55.4kΩ51.2kΩ There are two ways to make use of this chip. One is to follow the instructions in the datasheet to send the data bit by bit. The second way is to use the libraries that have already been written for this chip. Using libraries is the easiest way to get the required result. With libraries, you can simply enter the required data to send without worrying about anything.We'll send the data to the chip through the DIN pin. The data is sent bit by bit by setting the chip clock for each bit. The Chip stores the serial data in its registers until all data is received. After completing the data sent, we will set the CS pin for the chip to transfer all the data stored in the register to the output.Once the data is output by the chip, the corresponding LEDs will be illuminated to display the result.MAX7219 ApplicationsGeneral purpose SHIFT operationMeasuring InstrumentsDigital ElectronicsServersMemory unitsNetworkingDigital systemsMAX7219 DimensionsComponent DatasheetMAX7219 LED Display Driver DatasheetFAQ How many LED MATRIX does the MAX7219 control?8x8 What are alternatives of max7219?74HC595, MAX7221

I IntroductionThis blog mainly discusses the difference between LM324 and LM324A, and whether they can replace each other in the circuit. The difference between LM324 and other models like LM741, LM358, LM324N, etc. are also discussed in this blog.Figure 1. LM324CatalogI IntroductionII LM324AD and LM3242.1 Difference2.2 Parameters2.3 Can the Two Replace Each Other?III Difference Between LM324 and LM741, LM358IV Difference Between LM324 and LM318V Difference Between LM324 and LM324NVI Difference Between LM324 and LM324JFAQOrdering & QuantityII LM324AD and LM324LM324 is a four-operational amplifier, which is a large category. It includes two independent, high-gain, internal frequency-compensated operational amplifiers. LM324 is suitable for a single power supply with a wide range of power supply voltages and is also suitable for dual power supply operating mode. Under the recommended operating conditions, the power supply current is independent of the power supply voltage. According to the suffix of LM324, A seed model (specification) is included.The following will introduce to you the difference between lm324A and lm324, and whether they can be used interchangeably in the circuit.2.1 DifferenceThe accuracy index of LM324A is slightly higher than that of LM324. Take  TI's products as an example:Offset Voltage　　The input offset voltage of the LM324A is 2mV (typical) to 3mV (maximum);　　The input offset voltage of the LM324 is 3mV (typical) to 7mV (maximum).Offset Current　　The input offset current of the LM324A is 2nA (typical) to 30nA (maximum);　　The input offset current of the LM324 is 2nA (typical) to 50nA (maximum).Input Bias Current　　The input bias current of LM324A is -15nA (typical) ~ -100nA (maximum);　　The input bias current of LM324 is -20nA (typical)~-250nA (maximum).　　Figure 2. Parameters2.2 ParametersIn fact, whether it is the N series or the A series of the LM324, they belong to the sub-series of the LM324. Only individual parameters such as input offset voltage and input offset current are slightly different, and the other parameters are the same.　ParameterLM324ALM324ArchitectureBipolarBipolarCMRR (Typ) (dB)8080FeaturesStandard AmpsStandard AmpsGBW (Typ) (MHz)1.21.2Input bias current (Max) (pA)100000250000Iq per channel (Typ) (mA)0.1750.175Number of channels (#)44Offset drift (Typ) (uV/C)7-Operating temperature range (C)0 to 700 to 70Output current (Typ) (mA)4040Rail-to-railIn to V-In to V-RatingCatalogCatalogSlew rate (Typ) (V/us)0.50.5Total supply voltage (Max) (+5V=5, +/-5V=10)3232Total supply voltage (Min) (+5V=5, +/-5V=10)33Vn at 1 kHz (Typ) (nV/rtHz)3535Vos (offset voltage @ 25 C) (Max) (mV)372.3 Can the Two Replace Each Other?When discussing whether the two chips can be replaced with each other, we generally refer to the following situations:Same Function, Same PackageThe two are interchangeable. For example, as far as the commonly used chips LM741, LM324, LM339  are concerned, there are many manufacturers whose chip specifications are more or less the same, the package is the same, and the pin function is also the same.Same Function, Different PackageBoth can be replaced. However, the size and shape are different, so it can not be installed directly in the original position, such as dual in-line package and four-sided flat package.Different Function, Same PackageThe two cannot be interchanged. Because, the packaging is the product's external specifications. For example, the 74ls373 latch and 74ls374 flip-flop cannot be simply interchanged.Because the LM324 and LM324AD  have the same function, but different packages, they can be replaced. However, this is only limited to the simulation circuit. If it is the actual circuit, due to the different packaging, you originally expected that the soldering position may not reach the size, so you need to replace the circuit.　　　Figure 3. LM324AIII Difference Between LM324 and LM741, LM358These three types of op amps are all general purpose op amps, and their performance indicators are not very high. The specific differences are mainly reflected in the following aspects:Number of Channels　　LM741: single op amp;　　LM358: dual op amp;　　LM324: quad op amp.Working Voltage Range　　LM741: 7V~36V;　　LM358: 3V~32V;　　LM324: 3V~32V.Unity Gain Bandwidth　　LM741: 1MHz　　LM358: 700kHz　　LM324: 1MHzPrecision　　The input offset voltage of these three types of op amps are:　　LM741: 6mV (maximum);　　LM358: 7mV;　　LM324: 7mV.Input ImpedanceThe LM741  and LM358  are lower, and the input bias current is in the μA level, while the LM324 is 90nA, which is dozens of times higher than the previous two.　Figure 4. LM741IV Difference Between LM324 and LM318The LM324 is a general-purpose op amp (quad op amps). Its slew rate is 0.4V/us and the gain-bandwidth product is 1.3MHz, which is suitable for general use.LM318 is a high-speed operational amplifier (single op amp), its slew rate is 50V/us, and the gain-bandwidth product is 15MHz. Therefore, LM318  is suitable for amplifying signals with higher frequencies.　Figure 5. LM318V Difference Between LM324 and LM324NLM324 has the same function as LM324N,  The difference between the two is that the LM324 does not specify the package form, and the LM324N  package is a plastic dual in-line package.　　　Figure 6. LM324NP.S.N suffix refers to the packaging:N is DIPM is SOICMT is TSSOPJ is ceramic DIPVI Difference Between LM324 and LM324JLM324J is a DIP package of LM324 produced by NS, which is itself LM324. Another package form of LM324 produced by NS is LM324M, and the package is SO8. Since different manufacturers have different suffix standards, you need to see the datasheet given by the certain manufacturer.FAQWhat is lm324?LM324 is a Quad op-amp IC integrated with four op-amps powered by a common power supply. The differential input voltage range can be equal to that of power supply voltage. Generally, op-amps can perform mathematical operations.Which is the difference between lm324 and lm339?The LM324 has a complementary output while the LM339 is open collector. In the complementary output, current can flow in either direction as required (either source or sink) while the open collector output can only sink current.What is op amp use for?Operational amplifiers are linear devices that have all the properties required for nearly ideal DC amplification and are therefore used extensively in signal conditioning, filtering or to perform mathematical operations such as add, subtract, integration and differentiation.How does an op amp work?What is lm324 used for?LM324 IC ApplicationsThe applications of IC LM324 include the following. By using this IC, the conventional op-amp applications can be implemented very simply. This IC can be used as oscillators, rectifiers, amplifiers, comparators etc.What is LM324 suitable for? Single power supply with a wide range of power supply voltagesWhat is independent of the power supply voltage under the recommended operating conditions?Power supply currentWhat is the gain-bandwidth product of the LM324?1.3MHzWhat is the package of LM324M produced by NS?SO8Why do you need to see the datasheet given by the certain manufacturer?Different manufacturers have different suffix standards