74HC139-74139 (Dual 2 to 4 Line Decoder)

74HC139-74139 (Dual 2 to 4 Line Decoder) is a high-quality electronic component designed for Arduino, prototyping, and educational electronics. 74HC139 IS A dual 2 to 4 line decoder/demultiplexer IC

Specification

Propagation Delay Time: 145 ns at 2V / 25 ns at 6V
Power Dissipation: 320 mW
Output Current: 5.2 mA at  6 V
No. of Inputs: 3X 3
No. of Pins: 16
Operating Temperature Range : -40°C to +125°C
Supply Voltage Range: 2V to 6V
Package: DIP-16

Logic Diagram
 

Symbol
Pin
Description

1E, 2E
1, 15
enable input (active LOW)

1A0, 1A1
2,3
address input

1Y0, 1Y1, 1Y2, 1Y3
4,5,6,7
output (active LOW)

GND
8
ground (0 V)

2Y0, 2Y1, 2Y2, 2Y3
12,11,10,9
output (active LOW)

2A0, 2A1
14,13
address input

VCC
16
positive supply voltage

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