74HC02 LOGIC GATE IC (INTEGRATED CIRCUIT) – KSH 150 at HIMASTORES Mombasa – best electronics in Kenya
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74HC02 LOGIC GATE IC (INTEGRATED CIRCUIT)

SKU: HMJ1076 Category: Intergrated circuits
KSH 150.00
In Stock

Product Description

74HC02 Quad 2-Input NOR Logic Gate IC

High-Speed CMOS NOR Gate for Digital Logic and Control Applications

The 74HC02 is a highspeed CMOS logic IC featuring four independent 2input NOR gates. The NOR gate produces a HIGH output only when ALL inputs are LOW, and a LOW output when any input is HIGH. This fundamental logic function is essential for active-low enable circuits, logic inversion, signal gating, and combinational logic implementations.

Operating voltage range: 2.0V to 6.0V
Propagation delay: 8ns typical at 5V
Output drive capability: ±5.2mA at 6V
Do not exceed 7.0V supply voltage - permanent damage may occur
Unused inputs must be tied to VCC or GND - floating inputs can cause excessive power consumption and oscillation

Technical Specifications

ParameterValue
Supply Voltage (VCC)2.0V to 6.0V
Input Voltage0V to VCC
Output Current (High/Low)±5.2mA (at 6V)
Propagation Delay8ns typical at 5V
Quiescent Current2µA typical (at 6V)
Operating Temperature-40°C to +125°C
Package TypesDIP14, SOIC14, TSSOP-14
Number of Gates4 (2-input each)

= Pin Configuration (DIP14/SOIC14/TSSOP-14) =

PinNameFunction
11YGate 1 Output
21AGate 1 Input A
31BGate 1 Input B
42YGate 2 Output
52AGate 2 Input A
62BGate 2 Input B
7GNDGround (0V)
83YGate 3 Output
93AGate 3 Input A
103BGate 3 Input B
114YGate 4 Output
124AGate 4 Input A
134BGate 4 Input B
14VCCSupply Voltage (2V to 6V)

= Truth Table (Per Gate) =

Input AInput BOutput Y
LOWLOWHIGH
LOWHIGHLOW
HIGHLOWLOW
HIGHHIGHLOW

> NOR gate output is HIGH ONLY when ALL inputs are LOW - otherwise output is LOW

Key Features

Four Independent NOR Gates Provides multiple NOR functions in a single 14pin package

Wide Supply Range - Operates from 2V to 6V for flexible system integration

Low Power Consumption 2µA quiescent current ideal for battery-powered designs

High Noise Immunity - VIH/VIL specifications ensure reliable operation

Compatible Inputs - Accepts both CMOS and TTL drive levels

Schmitt Trigger Action - Clean switching even with slow input edges

= Applications =

  • Active-low enable and disable circuits
  • Signal inversion and gating
  • Logic decision and control systems
  • Alarm and monitoring circuits
  • Address decoding in memory systems
  • Reset and shutdown control
  • Industrial automation logic
  • Consumer electronics controls
  • Boolean equation implementation
  • Latch and flip-flop circuits
Versatile NOR Function - Universal gate can implement any logic function
Four Gates in One IC - Saves board space and reduces component count

√ Industry-standard 74HC02 pinout for easy replacement

√ Low power consumption - 2µA typical quiescent current

√ Fully tested and guaranteed functional

Package Includes

  1. 1x 74HC02 Logic IC (Package: DIP14, SOIC14, or TSSOP-14 per variant)
  2. Anti-static packaging for safe delivery
Use NOR gate as an inverter by tying both inputs together
Use NOR gate as active-low AND by applying inverted inputs
This IC is also available as 74HCT02 for TTL-compatible input levels
NOR gate with one input tied LOW acts as a noninverting buffer (passthrough)
NOR gate with one input tied HIGH produces constant LOW output
NOR gate is a universal gate - can be used to build AND, OR, NOT, and NAND functions
Multiple NOR gates can be cascaded for wide-input NOR functions
Never leave inputs floating use pullup or pull-down resistors
ESD sensitive device - use proper handling procedures
Ensure decoupling capacitor (0.1µF) is placed near VCC pin