74AHC257 Просмотр технического описания (PDF) - Philips Electronics
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74AHC257 Datasheet PDF : 20 Pages
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Philips Semiconductors
Quad 2-input multiplexer; 3-state
Product specification
74AHC257;
74AHCT257
FUNCTION TABLE
See note 1.
OE
S
H
X
L
H
L
H
L
L
L
L
Note
1. H = HIGH voltage level;
L = LOW voltage level;
X = don’t care;
Z = high impedance OFF-state.
INPUT
nI0
X
X
X
L
H
OUTPUT
nI1
nY
X
Z
L
L
H
H
X
L
X
H
ORDERING INFORMATION
TYPE NUMBER
74AHC257D
74AHC257PW
74AHCT257D
74AHCT257PW
TEMPERATURE
RANGE
−40 to +125 °C
PINS
16
16
16
16
PACKAGES
PACKAGE
SO
TSSOP
SO
TSSOP
MATERIAL
plastic
plastic
plastic
plastic
CODE
SOT109-1
SOT403-1
SOT109-1
SOT403-1
PINNING
PIN
1
2, 5, 11 and 14
3, 6, 10 and 13
4, 7, 9 and 12
8
15
16
SYMBOL
S
1I0 to 4I0
1I1 to 4I1
1Y to 4Y
GND
OE
VCC
DESCRIPTION
common data select input
data inputs from source 0
data inputs from source 1
multiplexer outputs
ground (0 V)
output enable input (active LOW)
DC supply voltage
2000 Apr 03
3
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