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SN54/74LS165
8-BIT PARALLEL-TO-SERIAL
SHIFT REGISTER
The SN54 / 74LS165 is an 8-bit parallel load or serial-in register with
complementary outputs available from the last stage. Parallel inputing occurs
asynchronously when the Parallel Load (PL) input is LOW. With PL HIGH, 8-BIT PARALLEL-TO-SERIAL
serial shifting occurs on the rising edge of the clock; new data enters via the
SHIFT REGISTER
Serial Data (DS) input. The 2-input OR clock can be used to combine two
independent clock sources, or one input can act as an active LOW clock LOW POWER SCHOTTKY
enable.
CONNECTION DIAGRAM DIP (TOP VIEW)
VCC CP2 P3 P2 P1 P0 DS Q7
J SUFFIX
16 15 14 13 12 11 10 9
CERAMIC
CASE 620-09
NOTE:
16
The Flatpak version 1
has the same pinouts
(Connection Diagram) as
the Dual In-Line Package.
1 2 3 4 5 6 7 8 N SUFFIX
PL CP1 P4 P5 P6 P7 Q7 GND PLASTIC
16 CASE 648-08
1
PIN NAMES LOADING (Note a)
HIGH LOW
D SUFFIX
CP1, CP2 Clock (LOW-to-HIGH Going Edge) Inputs 0.5 U.L. 0.25 U.L.
SOIC
DS Serial Data Input 0.5 U.L. 0.25 U.L. 16
1 CASE 751B-03
PL Asynchronous Parallel Load (Active LOW) 1.5 U.L. 0.75 U.L.
Input
P0