74HC_HCT257_15 Datasheet, PDF (4/18 Pages) NXP Semiconductors – Quad 2-input multiplexer; 3-state

NXP Semiconductors
74HC257; 74HCT257
Quad 2-input multiplexer; 3-state
5. Pinning information
5.1 Pinning
+&
+&7
6
, 
, 
< 
, 
, 
< 
*1' 
 9_&&
 2(
 ,
 ,
 <
 ,
 ,
 <
DDG
Fig 5. Pin configuration DIP16, SO16, SSOP16 and TSSOP16
5.2 Pin description
Table 2. Pin description
Symbol
Pin
S
1
1I0 to 4I0
2, 5, 11, 14
1I1 to 4I1
3, 6, 10, 13
1Y to 4Y
4, 7, 9, 12
GND
8
OE
15
V_CC
16
Description
common data select input
data input from source 0
data input from source 1
3-state multiplexer output
ground (0 V)
3-state output enable input (active LOW)
supply voltage
6. Functional description
6.1 Function table
Table 3.
Control
OE
H
L
L
L
L
Function table^[1]
S
X
H
H
L
L
Input
nl0
nl1
X
X
X
L
X
H
L
X
H
X
[1] H = HIGH voltage level; L = LOW voltage level; X = don’t care; Z = high-impedance OFF-state.
Output
nY
Z
L
H
L
H
74HC_HCT257
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 6 — 26 January 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
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