54165 DM74165 8-Bit Parallel-to-Serial Converter
August 1989
54165 DM74165
8-Bit Parallel-to-Serial Converter
General Description
The ’165 is an 8-bit parallel load or serial-in register with
complementary outputs available from the last stage Paral-
lel inputting occurs asynchronously when the Parallel Load
(PL) input is LOW With PL HIGH serial shifting occurs on
the rising edge of the clock new data enters via the Serial
Data (D
S
) input The 2-input OR clock can be used to com-
bine two independent clock sources or one input can act as
an active LOW clock enable
Connection Diagram
Dual-In-Line-Package
Logic Symbol
TL F 9782 – 2
V
CC
e
Pin 16
GND
e
Pin 8
TL F 9782 – 1
Order Number 54165DMQB 54165FMQB or DM74165N
See NS Package Number J16A N16E or W16A
Pin Names
CP1 CP2
D
S
PL
P0–P7
Q7
Q7
Description
Clock Pulse Inputs (Active Rising Edge)
Serial Data Input
Asynchronous Parallel Load Input
(Active LOW)
Parallel Data Inputs
Serial Output from Last Stage
Complementary Output
C
1995 National Semiconductor Corporation
TL F 9782
RRD-B30M115 Printed in U S A
NSC [ NATIONAL SEMICONDUCTOR ]
