m74hc251 STMicroelectronics, m74hc251 Datasheet - Page 2

• Manufacturer Part Number: m74hc251
• Description: 8-channel Multiplexer 3-state
• Manufacturer: STMicroelectronics

M74HC251
INPUT AND OUTPUT EQUIVALENT CIRCUIT
TRUTH TABLE
X : Don’t Care
Z : High Impedance
2/11
C
H
H
H
H
X
L
L
L
L
B
H
H
H
H
X
L
L
L
L
INPUTS
A
H
H
H
H
X
L
L
L
L
PIN DESCRIPTION
4, 3, 2, 1, 15,
14, 13, 12
STROBE
11, 10, 9
PIN No
16
H
S
5
6
7
8
L
L
L
L
L
L
L
L
SYMBOL
STROBE
D0 to D7
A, B, C
GND
Vcc
W
Y
D0
D1
D2
D3
D4
D5
D6
D7
Y
Z
Multiplexer Inputs
Multiplexer Output
Complementary Multi-
plexer Output
3 State Output Enable
Input
Select Inputs
Ground (0V)
Positive Supply Voltage
NAME AND FUNCTION
OUTPUTS
D0
D1
D2
D3
D4
D5
D6
D7
W
Z