HD74HC442 Datasheet, PDF (2/8 Pages) Hitachi Semiconductor – Quad. Tridirectional Bus Transceiver(with noninverted/inverted 3-state outputs)

HD74HC442, HD74HC443, HD74HC444
Function Table
Inputs
CS
S1
S0
GA
GB
GC
H
X
X
X
X
X
X
H
H
X
X
X
X
X
X
H
H
H
X
L
L
X
H
H
X
L
H
H
X
H
X
H
L
H
H
X
L
L
L
X
L
L
L
L
H
L
X
L
L
H
L
L
L
X
L
L
L
X
L
H
L
L
H
H
X
L
L
H
L
L
H
X
L
L
L
X
H
L
L
L
H
L
X
H
L
H
L
H
L
X
H : high level
L : low level
X : irrelevant
Pin Arrangement
Transfers Between Buses
HD74HC442
HD74HC443
HD74HC444
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
A → B, A → C
A → B, A → C
A → B, A → C
B → C, B → A
B → C, B → A
B → C, B → A
C → A, C → B
C → A, C → B
C → A, C → B
A→B
A→B
A→B
B→C
B→C
B→C
C→A
C→A
C→A
A→C
A→C
A→C
B→A
B→A
B→A
C→B
C→B
C→B
CS 1
B1 2
C1 3
C2 4
B2 5
B3 6
C3 7
C4 8
B4 9
GND 10
(Top view)
20 VCC
19 GC
18 GB
17 GA
16 A1
15 A2
14 A3
13 A4
12 S1
11 S0
Rev.2.00 Mar 30, 2006 page 2 of 7