74LS195 Universal 4-Bit Shift Register IC

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The SN54/ 74LS195 is a high-speed 4-Bit Universal Shift Register offering typical shift frequencies of 39 MHz. It is useful for a wide variety of registers and counting applications. It utilizes the Schottky diode clamped process to achieve high speeds and is fully compatible with all Motorola TTL products. The 74LS195 IC output always comes in TTL which makes it easy to work with other TTL devices and microcontrollers. The IC 74LS195 is smaller in size and it has a much faster speed which makes it reliable in every kind of device.

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What is a Universal Shift Register?

Universal Shift registers are an integral part of digital memory circuitry usually found in devices such as calculators, computers, and data processing systems. With a universal shift register, data or bits can be entered into the system in a serial or parallel manner. Data entry using 74LS195 is usually done from one direction, and as more data is added, it shifts positions until the data gets to the output end. The two ends are referred to as the left and right end. The movement of data can be from left to right, from right to left, or in both directions to make a bidirectional shift register.

74LS195 Pinout

74LS195 Pin Description

Pin No.	Pin Name	Description
1	MR’	Active Low Master Reset Input
2	J	First stage J Input
3	K’	Active Low First Stage K Input
4	P0	Parallel Data Input P0
5	P1	Parallel Data Input P1
6	P2	Parallel Data Input P2
7	P3	Parallel Data Input P3
8	GND	Ground Pin
9	PE’	Active Low Parallel Enable Input
10	CP	Clock Pulse Input
11	Q3′	Complementary Last Stage Output
12	Q3	Parallel Output Q3
13	Q2	Parallel Output Q2
14	Q1	Parallel Output Q1
15	Q0	Parallel Output Q0
16	Vcc	Chip Supply Voltage