74LVC257A Philips Semiconductors, 74LVC257A Datasheet - Page 3

• Manufacturer Part Number: 74LVC257A
• Description: Quad 2-input multiplexer with 5 Volt tolerant inputs/outputs 3-State
• Manufacturer: Philips Semiconductors

Philips Semiconductors
PIN DESCRIPTION
LOGIC SYMBOL (IEEE/IEC)
FUNCTIONAL DIAGRAM
1998 Jul 29
1
2, 5, 11, 14
3, 6, 10, 13
4, 7, 9, 12
8
15
16
NUMBER
Quad 2-input multiplexer with 5 Volt tolerant
inputs/outputs (3-State)
PIN
11
10
14
13
2
3
5
6
1I
1I
2I
2I
3I
3I
4I
4I
0
1
0
1
0
1
0
1
S
1l
1l
1Y to 4Y
GND
OE
V
SYMBOL
3
1
15
2
5
6
11
10
14
13
CC
0
1
to 4l
to 4l
SELECTOR
0
1
S
1
1
G1
EN
1
Common data select input
Data inputs from source 0
Data outputs from source 1
3-State multiplexer outputs
Ground (0 V)
3-State output enable input (active
LOW)
Positive supply voltage
MUX
MULTIPLEXER
OUTPUTS
3–STATE
FUNCTION
SV00638
OE
15
12
4
7
9
SV00639
1Y
2Y
3Y
4Y
12
4
7
9
3
H =
L =
X =
Z =
FUNCTION TABLE
NOTES:
LOGIC DIAGRAM
OE
H
L
L
L
L
1I0
2I
3I
4I
OE
1I
2I
3I
4I
HIGH voltage level
LOW voltage level
don’t care
high impedance OFF-state
S
0
0
0
1
1
1
1
S
X
H
H
L
L
INPUTS
nl
X
X
X
H
L
0
74LVC257A
nl
X
H
X
X
L
Product specification
1
SV00640
1Y
2Y
3Y
4Y
OUTPUTS
nY
H
H
Z
L
L