Datasheet

December 1990 3
Philips Semiconductors Product specification
8-input multiplexer; 3-state 74HC/HCT251
PIN DESCRIPTION
PIN NO. SYMBOL NAME AND FUNCTION
4, 3, 2, 1, 15, 14, 13, 12 I
0
to I
7
multiplexer inputs
5 Y multiplexer output
6
Y complementary multiplexer output
7
OE 3-state output enable input (active LOW)
8 GND ground (0 V)
11, 10, 9 S
0
,S
1
,S
2
select inputs
16 V
CC
positive supply voltage
Fig.1 Pin configuration. Fig.2 Logic symbol. Fig.3 IEC logic symbol.