4002 Dual 4 Input NOR Gate CMOS Logic IC
The 4002 is a high-speed CMOS dual 4-input NOR gate implemented in silicon-gate HC logic. Each device contains two independent NOR gates, each with four inputs, allowing compact implementation of multi-input NOR logic in digital systems. Built with CMOS technology, the device combines the switching speed associated with bipolar/LSTTL logic and the low static power consumption of CMOS, making it suitable for battery-sensitive and moderate-speed applications.
Physically available in DIP, SOIC and TSSOP housings, the HC4002 is pin-compatible with standard LS family logic for easy replacement or mixed-family designs. It is designed to drive typical LSTTL loads directly while providing high noise immunity and wide operating temperature performance, so the same part can be used across a variety of environments without re-engineering the gate-level layout.
Engineers often choose the 4002 where simple, compact NOR logic is required for address decoding, control gating, priority logic or combining multiple conditional signals. Its straightforward truth-table behavior and stable CMOS characteristics make it a durable building block in both commercial and more demanding industrial or military systems.
Features:
- Dual 4-input NOR gates in a single 14-pin package.
- Silicon-gate HC CMOS technology: LSTTL-like speed with low power consumption.
- Typical propagation delay ≈ 8 ns (VCC = 5 V, CL = 15 pF, TA = 25 °C).
- Ability to drive 10 LSTTL loads (standard outputs).
- Wide recommended supply range (HC types: 2 V to 6 V).
- High noise immunity (NIL/NIH ≈ 30% of VCC at VCC = 5 V).
- Wide ambient temperature range (–55 °C to +125 °C for specified devices).
Specifications:
| Parameter | Value (from datasheet) |
|---|---|
| Function: | Dual 4-Input NOR Gate. |
| Recommended VCC (HC): | 2.0 V to 6.0 V. |
| Absolute maximum VCC: | –0.5 V to +7.0 V. |
| Typical propagation delay: | 8 ns (VCC = 5 V, CL = 15 pF, TA = 25 °C). |
| Input leakage (II): | typ ±0.1 μA (VI = VCC or GND, at 6 V). |
| Supply current (ICC): | typ 2 μA (at 6 V, 25 °C); up to 40 μA over full temp at 6 V. |
| IO (output source/sink) absolute max per pin: | ±25 mA (absolute-maximum rating). |
| Input threshold levels (VIH / VIL): | VIH ≈ 0.75·VCC (VCC); VIL ≈ 0.25·VCC (see datasheet table). |
| Operating temperature: | –55 °C to +125 °C |
| Package options: | PDIP, SOIC, TSSOP, CDIP |
Applications:
- General-purpose digital logic.
- Interface to LSTTL / mixed-logic systems.
- Address decoding and control gating.
- Industrial / military temperature-range systems.
Package Contents:
- 1x 4002 Dual 4 Input NOR Gate CMOS Logic IC
