Datasheet

74AHC_AHCT157_2 © NXP B.V. 2007. All rights reserved.
Product data sheet Rev. 02 — 9 November 2007 4 of 16
NXP Semiconductors
74AHC157; 74AHCT157
Quad 2-input multiplexer
5.2 Pin description
6. Functional description
[1] H = HIGH voltage level;
L = LOW voltage level;
X = don’t care.
Table 2. Pin description
Symbol Pin Description
S 1 common data select input
1I0 to 4I0 2, 5, 11, 14 data inputs from source 0
1I1 to 4I1 3, 6, 10, 13 data inputs from source 1
1Y to 4Y 4, 7, 9, 12 multiplexer outputs
GND 8 ground (0 V)
E 15 enable input (active LOW)
V
CC
16 supply voltage
Table 3. Function table
[1]
Input Output
E S nI0 nI1 nY
HXXXL
LLLXL
LLHXH
LHXLL
LHXHH