m54hc257k1 STMicroelectronics, m54hc257k1 Datasheet - Page 2

• Manufacturer Part Number: m54hc257k1
• Description: Hc258quad 2channel Multiplexer 3-state, Inverting Hc257 Quad 2 Channel Multiplexer 3-state
• Manufacturer: STMicroelectronics

M54HC257
IEC LOGIC SYMBOLS
INPUT AND OUTPUT EQUIVALENT CIRCUIT
TRUTH TABLE
X : Don’t Care
Z : High Impedance
2/10
OE
H
L
L
L
L
SELECT
H
H
X
L
L
INPUTS
A
X
H
X
X
L
PIN DESCRIPTION
3, 6, 13, 10
2, 5, 14, 11
4, 7, 12, 9
PIN N°
15
16
1
8
SYMBOL
SELECT
1A to 4A
1B to 4B
1Y to 4Y
GND
V
B
X
X
X
H
OE
L
CC
Common Data Select
Input
Data Input From Source A
Data Input From Source B
3 State Multiplexer
Outputs
3 State Output Enable
Inputs (Active Low)
Ground (0V)
Positive Supply Voltage
NAME AND FUNCTION
OUTPUT
Y
H
H
Z
L
L