74LS165 8-bit Serial Shift Register, Parallel Load

The 74LS series of integrated circuits (ICs) was one of the most popular logic families of transistor-transistor logic (TTL) logic chips. 74LS series is a bipolar, low-power Schottky IC.The 74LS165A is an 8-bit serial shift register that shifts the data in the direction of Q_A toward Q_H when clocked. Parallel-in access to each stage is made available by eight individual, direct data inputs that are enabled by a low level at the shift/load (SH/LD\) input.

74LS165 Features

• 8-Bit Shift Register which Shifts Data from Qa to Qh when Clocked
• Complementary Outputs
• Gated Clock Inputs
• Clock Frequency up to 35MHz
• Standard TTL Switching Voltages

74LS165 Specifications

Supply Voltage	4.75 – 5.25Vdc
Maximum Clock Frequency	40Mhz
Power Dissipation	2mW/gate @100kHz
Minimum Output Current	8mA
Propagation Delay	10nS
Fan Out (TTL Loads)	20

74LS165 Pinout Diagram

74LS165 Pin Description

Pin No	Pin Name	Description
1	PL’	Asynchronous Parallel Load (Active LOW)Input
2	CP1	Clock (LOW-to-HIGH Going Edge) Input
3	P4	Parallel Data Input
4	P5	Parallel Data Input
5	P6	Parallel Data Input
6	P7	Parallel Data Input
7	Q7′	Complementary Output
8	GND	Ground
9	Q7	Serial Output from Last State
10	DS	Serial Data Input
11	P0	Parallel Data Input
12	P1	Parallel Data Input
13	P2	Parallel Data Input
14	P3	Parallel Data Input
15	CP2	Clock (LOW-to-HIGH Going Edge) Input
16	VCC	Positive Supply

Applications

• The shift registers are used for temporary data storage.
• The shift registers are also used for data transfer and data manipulation.
• The serial-in serial-out and parallel-in parallel-out shift registers are used to produce time delay to digital circuits.

74LS165 Alternative Equivalent

74LS166

Download 74LS165 8-bit Serial Shift Register, Parallel Load Datasheet from the link given below.