PHILIPS 74HC HCT21 Data Sheet
Summary
The 74HC/HCT21 are high-speed Si-gate CMOS dual 4-input AND gates, pin-compatible with low-power Schottky TTL (LSTTL) and specified per JEDEC standard no. 7A. These SSI category devices feature standard output capability with typical propagation delays of 10ns (HC) and 12ns (HCT) at 5V supply. The ICs offer low input capacitance and power dissipation, making them suitable for digital logic applications requiring compact AND gate functionality. Designed for electronics engineers and digital circuit designers in consumer and industrial equipment.
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DATA SHEET For a complete data sheet, please also download: The IC06 74HC/HCT/HCU/HCMOS Logic Family Specifications The IC06 74HC/HCT/HCU/HCMOS Logic Package Information The IC06 74HC/HCT/HCU/HCMOS Logic Package Outlines
74HC/HCT21 Dual 4-input AND gate
Product specification December
File under Integrated Circuits, IC06
Page Summary Contents For PHILIPS 74HC HCT21 Data Sheet
Manual Details
| Brand | Philips |
|---|---|
| Pages | 6 |
| File Size | 30.58 KB |
| Published | July 04, 2026 |
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Frequently Asked Questions
What is the propagation delay for the 74HC21?
At 5V and 25°C with a 15pF load, typical propagation delay is 10ns for 74HC.
What is the pinout of the 74HC/HCT21?
Pins 1,2,4,5 are inputs for gate 1 (1A,1B,1C,1D); pin 6 is its output (1Y). Pins 9,10,12,13 are inputs for gate 2; pin 8 is its output (2Y). Pin 7 is GND, pin 14 is Vcc. Pins 3 and 11 are not connected.
How do the 74HC and 74HCT versions differ?
74HCT is TTL compatible (input voltage GND to Vcc-1.5V) and has slightly different propagation delay (12ns typical). 74HC input range is GND to Vcc.
What is the function of the 74HC/HCT21?
It is a dual 4-input AND gate. The output (nY) is HIGH only when all four inputs (nA, nB, nC, nD) are HIGH.