74LVC257APWDH 查看數據表（PDF） - Philips Electronics
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74LVC257APWDH
Philips Electronics
74LVC257APWDH Datasheet PDF : 10 Pages
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Philips Semiconductors
Quad 2-input multiplexer with 5 Volt tolerant
inputs/outputs (3-State)
Product specification
74LVC257A
PIN DESCRIPTION
PIN
NUMBER
SYMBOL
FUNCTION
1
S
Common data select input
2, 5, 11, 14
3, 6, 10, 13
4, 7, 9, 12
1l0 to 4l0
1l1 to 4l1
1Y to 4Y
Data inputs from source 0
Data outputs from source 1
3-State multiplexer outputs
8
GND
Ground (0 V)
15
OE
3-State output enable input (active
LOW)
16
VCC
Positive supply voltage
LOGIC SYMBOL (IEEE/IEC)
1
G1
15
EN
2
1 MUX
3
1
5
6
11
10
14
13
4
7
9
12
SV00638
FUNCTIONAL DIAGRAM
2 1I0
3 1I1
5 2I0
6 2I1
11 3I0
10 3I1
14 4I0
13 4I1
SELECTOR
S
1
1Y 4
2Y 7
3–STATE
MULTIPLEXER
OUTPUTS
3Y 9
4Y 12
OE
15
SV00639
FUNCTION TABLE
INPUTS
OE
S
nl0
H
X
X
L
H
X
L
H
X
L
L
L
L
L
H
NOTES:
H = HIGH voltage level
L = LOW voltage level
X = don’t care
Z = high impedance OFF-state
LOGIC DIAGRAM
1I1
1I0
2I1
2I0
3I1
3I0
4I1
4I0
OE
S
OUTPUTS
nl1
nY
X
Z
L
L
H
H
X
L
X
H
1Y
2Y
3Y
4Y
SV00640
1998 Jul 29
3
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