
TL/F/9794
9
June 1989
9338/DM9338 8-Bit Multiple Port Register
General Description
The DM9338 is an 8-bit multiple port register designed for
high speed random access memory applications where the
ability to simultaneously read and write is desirable. A com-
mon use would be as a register bank in a three address
computer. Data can be written into any one of the eight bits
and read from any two of the eight bits simultaneously.
Connection Diagrams
Dual-In-Line Package
TL/F/9794–1
Order Number 9338DMQB, 9338FMQB or DM9338N
See NS Package Number J16A, N16E or W16A
Pin Names
Description
A0–A2
D
A
B0–B2
C0–C2
CP
SLE
Z
B
Z
C
Write Address Inputs
Data Input
B Read Address Inputs
C Read Address Inputs
Clock Pulse Input (Active Rising Edge)
Slave Enable Input (Active LOW)
B Output
C Output
FAST
é
and TRI-STATE
é
are registered trademarks of National Semiconductor Corporation.
C
1995 National Semiconductor Corporation
RRD-B30M115/Printed in U. S. A.