74LS195 4-bit Parallel-Access Shift Register


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 74LS195A is a high-speed 4-Bit Shift Register offering typical shift frequencies of 39 MHz. It is useful for a wide variety of registering and counting applications

74LS195 Features

  • Synchronous Serial or Parallel Data Transfers
  • Asynchronous Master Reset
  • High Speed up to 39MHz
  • Input Clamping Diodes
  • Standard TTL Switching Voltages

74LS195 Specifications

Supply Voltage4.75 – 5.25Vdc
Maximum Clock Frequency40Mhz
Power Dissipation2mW/gate @100kHz
Minimum Output Current8mA
Propagation Delay10nS
Fan Out (TTL Loads)20

74LS195 Pinout Diagram

74LS195 Pin Description

Pin NoPin NameDescription
1MRMaster Reset (Active LOW) Input
2JFirst Stage J (Active HIGH) Input
3KFirst Stage K (Active LOW) Input
4P0Parallel Data Input
5P1Parallel Data Input
6P2Parallel Data Input
7P3Parallel Data Input
9PE’Parallel Enable (Active LOW) Input
10CPClock (Active HIGH Going Edge) Input
11Q3′Complementary Last Stage Output
12Q3Parallel Output
13Q2Parallel Output
14Q1Parallel Output
15Q0Parallel Output
16VCCPositive Supply


  • 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.

74LS195 Alternative Equivalent

Download the 74LS195 4-bit Parallel-Access Shift Register Datasheet from the link given below.