Denon AVR-S510BT Service Manual page 94

TC74VHC157FT (DIGITAL : IC745-747)
Pin Assignment
SELECT 1
1A 2
1B 3
1Y 4
2A 5
2B 6
2Y 7
GND
8
Truth Table
ST SELECT
H X
L L
L L
L H
Package Markings
EN5339
L H
EN5339
X: Don't care
Information:
http://www.enpirion.com/resource-center-packing-and-marking-information.htm
EN5339QI (DIGITAL : IC751-753)
Figure 3: Pin Out Diagram (Top View)
16 V
A S G 15 ST
B A 14 4A
Y B 13 4B
A Y
12 4Y
B A 11 3A
Y Y B 10 3B
9 3Y
(top view)
Inputs
Output
A B
X X
L X
H X
X L
Temp Rating (° C)
-40 to +85 24-pin (4mm x 6mm x 1.1mm) QFN T&R
X H
QFN Evaluation Board
IEC Logic Symbol
ST
CC
SELECT
1A
1B
2A
2B
3A
3B
4A
4B
L
EN5339QI
L
H
L
Package Description
H
94
2
TC74VHC157F/FN/FT/FK
(15)
EN
(1)
G1
(2)
1 MUX
(3)
1
(5)
(6)
(11)
(10)
(14)
(13)
(4)
1Y
(7)
2Y
(9)
3Y
(12)
4Y
2007-10-01