
93L38
8-Bit Multiple Port Register
General Description
The 93L38 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 common 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. The circuit
uses TTL technology and is compatible with all TTL families.
Features
n
Master/slave operation permitting simultaneous
write/read without race problems
n
Simultaneously read two bits and write one bit in any
one of eight bit positions
n
Readily expandable to allow for larger word sizes
Connection Diagram
Logic Symbol
Pin
Names
A0–A2
DA
B0–B2
C0–C2
CP
SLE
ZB
ZC
Description
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
Dual-In-Line Package
DS010202-1
Order Number 93L38DMQB or 93L38FMQB
See Package Number J16A or W16A
DS010202-2
V
= Pin 16
GND = Pin 8
March 1998
9
1998 Fairchild Semiconductor Corporation
DS010202
www.fairchildsemi.com