onsemi MC74HC00ANG Quad 2-Input NAND Gate: Datasheet, Pinout, and Application Circuits

The MC74HC00ANG from onsemi is a member of the 74HC high-speed CMOS logic family, integrating four independent 2-input NAND gates in a single package. This IC is renowned for its wide operating voltage range (2V to 6V), low power consumption, and high noise immunity, making it a fundamental building block in countless digital circuits. It is supplied in a 14-pin PDIP (Plastic Dual In-line Package), which is ideal for prototyping and breadboarding.

Datasheet Overview

Key parameters from the datasheet define the IC's performance and operating limits:

Logic Family: HC (High-Speed CMOS)

Supply Voltage Range (VCC): 2.0 to 6.0 Volts DC

High-Level Input Voltage (VIH): Min. 3.15V @ 4.5V VCC

Low-Level Input Voltage (VIL): Max. 1.35V @ 4.5V VCC

Propagation Delay: Typical 9 ns @ 4.5V VCC

Operating Temperature Range: -55°C to +125°C

Output Current: ±4 mA @ 4.5V VCC

These specifications highlight its compatibility with both CMOS and TTL logic levels and its suitability for high-speed operation while consuming very little power.

Pinout Configuration

Understanding the pinout is crucial for correct circuit design. The MC74HC00ANG in a 14-pin DIP package has the following configuration:

Pins 1, 4, 9, 12: Inputs for the four NAND gates (A1, A2, A3, A4).

Pins 2, 5, 8, 13: Second inputs for the four NAND gates (B1, B2, B3, B4).

Pins 3, 6, 11, 10: Outputs for the four NAND gates (Y1, Y2, Y3, Y4).

Pin 7: Ground (GND).

Pin 14: Positive Supply Voltage (VCC).

This symmetrical layout simplifies board design and troubleshooting.

Application Circuits

The NAND gate is a universal gate, meaning any other logic function (AND, OR, NOT, NOR, XOR) can be constructed from it alone. This versatility is key to its widespread use.

1. Basic NAND Gate Operation:

The fundamental function is `Y = NOT (A AND B)`. The output is LOW only when both inputs are HIGH; for all other input combinations, the output is HIGH.

2. Configuring as an Inverter (NOT Gate):

By connecting both inputs together, a NAND gate functions as an inverter. The single input (A) is applied to both pins, so the output becomes `Y = NOT (A AND A) = NOT A`.

3. Creating an SR Latch (Bistable Multivibrator):

Two cross-coupled NAND gates form a simple Set-Reset (SR) Latch, a basic memory element. This circuit can store a single bit of data. The state of the output (Q) is controlled by the Set (S) and Reset (R) inputs (both active LOW in this configuration).

4. Building Other Gates:

AND Gate: Created by connecting a NAND gate's output to the input of an inverter (which can be another NAND gate configured as NOT).

OR Gate: Constructed using three NAND gates by applying De Morgan's Theorem.

These applications demonstrate how the MC74HC00ANG can serve as the core component for creating oscillators, clock circuits, debounce switches, and complex state machines.

ICGOODFIND: The onsemi MC74HC00ANG remains an essential and versatile component in digital electronics. Its robust design, exceptional compatibility, and status as a universal gate make it indispensable for both educational purposes and complex industrial designs. Whether used for basic logic operations or synthesized into more advanced functions, it provides a reliable and cost-effective solution for a vast array of circuit needs.

Keywords: MC74HC00ANG, NAND Gate, CMOS Logic, Universal Gate, Pinout