SN54LS165 Datasheet, PDF (1/6 Pages) Motorola, Inc – 8-BIT PARALLEL-TO-SERIAL SHIFT REGISTER

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,
serial shifting occurs on the rising edge of the clock; new data enters via the
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
enable.
CONNECTION DIAGRAM DIP (TOP VIEW)
VCC CP2 P3 P2 P1 P0 DS Q7
16 15 14 13 12 11 10 9
NOTE:
The Flatpak version
has the same pinouts
(Connection Diagram) as
the Dual In-Line Package.
1
2
3
PL CP1 P4
4
5
6
P5 P6 P7
78
Q7 GND
PIN NAMES
LOADING (Note a)
HIGH
LOW
CP1, CP2
DS
PL
P0 – P7
Q7
Q7
Clock (LOW-to-HIGH Going Edge) Inputs
Serial Data Input
Asynchronous Parallel Load (Active LOW)
Input
Parallel Data Inputs
Serial Output from Last State (Note b)
Complementary Output (Note b)
0.5 U.L.
0.5 U.L.
1.5 U.L.
0.25 U.L.
0.25 U.L.
0.75 U.L.
0.5 U.L. 0.25 U.L.
10 U.L. 5 (2.5) U.L.
10 U.L. 5 (2.5) U.L.
NOTES:
a) 1 TTL Unit Load (U.L.) = 40 µA HIGH/1.6 mA LOW.
b) The Output LOW drive factor is 2.5 U.L. for Military (54) and 5 U.L. for Commercial (74)
Temperature Ranges.
CP
PL
1 2 Q0 Q1
L X X P0 P1
HL
DS Q0
HH
Q0 Q1
H
L DS Q0
H
H Q0 Q1
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
TRUTH TABLE
CONTENTS
Q2 Q3 Q4 Q5
P2 P3 P4 P5
Q1 Q2 Q3 Q4
Q2 Q3 Q4 Q5
Q1 Q2 Q3 Q4
Q2 Q3 Q4 Q5
Q6 Q7
P6 P7
Q5 Q6
Q6 Q7
Q5 Q6
Q6 Q7
RESPONSE
Parallel Entry
Right Shift
No Change
Right Shift
No Change
SN54/74LS165
8-BIT PARALLEL-TO-SERIAL
SHIFT REGISTER
LOW POWER SCHOTTKY
16
1
J SUFFIX
CERAMIC
CASE 620-09
16
1
N SUFFIX
PLASTIC
CASE 648-08
16
1
D SUFFIX
SOIC
CASE 751B-03
ORDERING INFORMATION
SN54LSXXXJ Ceramic
SN74LSXXXN Plastic
SN74LSXXXD SOIC
LOGIC SYMBOL
1 11 12 13 14 3 4 5 6
10
PL
DS
P0 P1
P2
P3 P4
P5 P6
P7
Q7
9
2
15
CP
Q7
7
VCC = PIN 16
GND = PIN 8
FAST AND LS TTL DATA
5-290