74HC147 – 74147 ( 10-to-4 Line Priority Encoder )

74HC147-74147 (10-to-4 Line Priority Encoder) is a high-quality electronic component designed for Arduino, prototyping, and educational electronics. CD74HC147E provide the 10-line to 4-line priority encoding function by use of the implied decimal “zero”. The “zero” is encoded when all nine data inputs are HIGH, forcing all four outputs HIGH.

FEATURES

Encodes 10-line decimal to 4-line BCD
Useful for 10-position switch encoding
Used in code converters and generators
Output capability: standard
ICC category: MS

Specification

Propagation Delay Time: 160 ns at 2V / 27 ns at 6V at 25°C
Output Current: 5.2 mA at  6 V
No. of Pins: 16
Operating Temperature Range : -40°C to +125°C
Supply Voltage Range: 2V to 6V
Package: DIP-16

Symbol
PIN
Description

Y0 to Y3
9,7,6,14
enable input (active LOW)

A0 to A8
11,12,13,1,2,3,4,5,10
address input

n.c.
15
output (active LOW)

GND
8
ground (0 V)

VCC
16
positive supply voltage

It’s perfect for DIY makers, students, and anyone building custom electronic circuits or STEM kits.