Texas Instruments SN74HC00N-NG

Overview

SN74HC00N-NG from Texas Instruments is a quadruple 2-input NAND gate IC in PDIP-14 package, operating from 2 V to 6 V supply, with –40°C to +85°C temperature range, buffered CMOS inputs, and balanced push-pull outputs. It implements Y = A ● B logic per gate and is used in digital control logic, S-R latches, and tamper-detect circuits.

For engineers reviewing the SN74HC00N-NG datasheet, SN74HC00N-NG pinout, SN74HC00N-NG application, or SN74HC00N-NG equivalent, key selection factors include its 14-pin PDIP mechanical compatibility, guaranteed propagation delay ≤23 ns at 4.5 V, fanout support up to 10 LSTTL loads, and low ICC (≤20 µA) for battery-sensitive designs.

Technical Context

This device integrates four independent, identical 2-input NAND gates using standard CMOS process technology. Each gate features high-impedance inputs with ≤10 pF input capacitance and rail-to-rail push-pull outputs capable of sourcing/sinking ±4 mA at 4.5 V while maintaining VOH ≥3.98 V and VOL ≤0.33 V.

It operates under commercial-grade conditions (–40°C to +85°C), supports fast switching (tpd = 9–23 ns depending on VCC), and includes internal clamp diodes for ESD protection (±2000 V HBM). Unused inputs must be terminated to VCC or GND to prevent floating-induced oscillation or excess power draw.

Key Specifications

Pinout & Package

Packaged in 14-pin Plastic Dual In-line Package (PDIP) with 19.30 mm × 6.40 mm body size and 2.54 mm lead pitch. Through-hole mounting compatible with standard 0.1″ grid PCB layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar NAND gate applications.

Compared with SN74HC00N-NG, SN74HCT00N offers improved input compatibility with TTL-level sources but consumes more quiescent current, while MC74HC00ANG provides identical functional and parametric performance as a qualified second source-both require no PCB or firmware modifications.

Availability

SN74HC00N-NG is available at Aetrix Electronics and suitable for industrial control logic, tamper-detect circuits, S-R latch implementations, and legacy system interface designs requiring stable component supply and long-term manufacturability.

Supply support for SN74HC00N-NG includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor company specializing in analog and embedded processing solutions, with over 90 years of innovation in logic, power management, and signal chain technologies.

The SN74HC00N-NG belongs to TI's 74HC high-speed CMOS logic family, designed for low-power, pin-compatible replacements of legacy TTL devices in industrial, automotive, and consumer applications.

FAQ

What is the maximum propagation delay of SN74HC00N-NG at 5 V operation?

The maximum propagation delay (tpd) for SN74HC00N-NG is 23 ns at VCC = 4.5 V and TA = –40°C to +85°C, as specified in the Switching Characteristics table. At exactly 5 V, interpolation between 4.5 V (23 ns max) and 6 V (20 ns max) confirms tpd remains ≤23 ns - ensuring reliable timing in synchronous logic designs with ≥40 MHz clock domains.

Can SN74HC00N-NG drive an LED directly?

Yes, SN74HC00N-NG can drive an LED directly when configured as a low-side switch (LED anode to VCC, cathode to output). With VOL ≤0.33 V at IOL = 4 mA and VCC = 4.5 V, it safely sinks up to 4 mA - sufficient for indicator LEDs with appropriate series resistance (e.g., 1 kΩ for ~4 mA at 5 V). Do not exceed absolute max IOL = ±25 mA.

Is SN74HC00N-NG pin-compatible with the original 7400 TTL device?

Yes, SN74HC00N-NG uses the industry-standard 14-pin DIP pinout matching the original 7400, including identical assignment of 1A–1Y, 2A–2Y, 3A–3Y, 4A–4Y, GND, and VCC. However, note that SN74HC00N-NG has CMOS input thresholds (VIH ≈ 3.15 V at 4.5 V), unlike TTL's 2 V threshold - verify upstream driver compatibility before replacement.

What decoupling capacitor is recommended for SN74HC00N-NG?

A 0.1 µF ceramic capacitor placed as close as possible between VCC (Pin 14) and GND (Pin 7) is explicitly recommended in the datasheet. This suppresses high-frequency supply noise generated during output transitions. For enhanced stability in noisy environments, TI also suggests paralleling with a 1 µF capacitor - both must be mounted within 5 mm of the pins to minimize inductance.

How should unused inputs on SN74HC00N-NG be handled?

Unused inputs on SN74HC00N-NG must never be left floating. Each unconnected input pin must be tied to either VCC or GND using a direct connection or a pull-up/pull-down resistor (10 kΩ recommended). Floating CMOS inputs cause increased ICC, potential oscillation, and ESD susceptibility - TI mandates termination to ensure stable, low-power operation across the full temperature range.