74HCT03N

Introduction

The 74HCT03N is a quad 2-input NAND gate chip which is widely used in digital applications such as microcontrollers, counters, timers and memory address decoding, etc.

Features

• Supply Voltage Range: 4.5V to 5.5V
• Schmitt-trigger input circuitry for protection against slow input rise and fall times
• Low power consumption
• High noise immunity
• Broad operating temperature range: -40°C to +125°C
• Available in DIP and SOIC packages

Pinout

The pinout diagram of 74HCT03N is as follows:

       +---+--+---+
   A1  |1  +--+ 14| Vcc
   B1  |2       13| A2
   Y1  |3       12| B2
  GND  |4       11| Y2
   A3  |5       10| B3
   B3  |6        9| Y3
   Y3  |7        8| GND
       +----------+

Truth Table

The truth table of 74HCT03N is as follows:

| A | B | Y | |---|---|---| | 0 | 0 | 1 | | 0 | 1 | 1 | | 1 | 0 | 1 | | 1 | 1 | 0 |

Usage Example

Here is an example of how to use 74HCT03N in a simple digital circuit to control an LED:

#define LED_PIN 5  // Define LED pin
#define NAND_A 2   // Define input A pin
#define NAND_B 3   // Define input B pin
#define NAND_Y 4   // Define output Y pin

void setup() {
  pinMode(LED_PIN, OUTPUT);  // Set LED pin as OUTPUT
  pinMode(NAND_A, INPUT);    // Set input A pin as INPUT
  pinMode(NAND_B, INPUT);    // Set input B pin as INPUT
  pinMode(NAND_Y, OUTPUT);   // Set output Y pin as OUTPUT
}

void loop() {
  digitalWrite(NAND_A, digitalRead(LED_PIN));   // Set input A as state of LED pin
  digitalWrite(NAND_B, HIGH);                  // Set input B as HIGH
  digitalWrite(LED_PIN, !digitalRead(NAND_Y));  // Set LED state as inverted output Y
  delay(500);                                  // Wait for 0.5 seconds
}

Conclusion

The 74HCT03N is a versatile and reliable digital IC that can be used in a wide range of applications. Its low power consumption, high noise immunity, and robustness make it an ideal choice for digital circuit designers. Its affordable price and easy availability have made it widely used in the electronics industry.