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Logic IC.

Part number	74LS155 Dual 2-Bit Binary Decoder
Category	Integrated Circuits › Logic Gates
Package	DIP-16
Pins	16
Resolution	2 bit

74LS155 Dual 2-Bit Binary Decoder pinout

Pin	Name	Type
1	Ea1	input
2	Ea2	input
3	A1	input
4	Q3a	output
5	Q2a	output
6	Q1a	output
7	Q0a	output
8	GND	ground
9	Q0b	output
10	Q1b	output
11	Q2b	output
12	Q3b	output
13	A0	input
14	Eb1	input
15	Eb2	input
16	VCC	power

Schematic symbol and footprint

Schematic symbol

Footprint: DIP-16_W7.62mm — to scale, pad 1 in yellow (mm). Check against the datasheet before ordering PCBs.