74LS259 8-Bit Addressable Latch

858 views

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. 74LS259 8-bit addressable latch is designed for general-purpose storage applications in digital systems. Specific uses include working registers, serial-holding registers, and active-high decoders or demultiplexers

74LS259 Features

  • 8-bit Parallel Out Storage Register Performs Serial to Parallel Conversion
  • Asynchronous Parallel Clear
  • Active High Decoder
  • Enable/Disable Input Simplifies Expansion
  • Standard TTL Switching Voltages

74LS259 Specifications

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

74LS259 Pinout Diagram

74LS259 Pin Description

Pin NoPin NameDescription
1A0Address input
2A1Address input
3A2Address input
4Q0Parallel Latch Output
5Q1Parallel Latch Output
6Q2Parallel Latch Output
7Q3Parallel Latch Output
8GNDGround
9Q4Parallel Latch Output
10Q5Parallel Latch Output
11Q6Parallel Latch Output
12Q7Parallel Latch Output
13DData Pin
14E’Enable Pin(Active Low)
15C’Clear Pin(Active Low)
16VCCPositive Supply

Applications

  • Working registers
  • Serial-holding registers
  • Active-high decoders or demultiplexers.

74LS259 Alternative Equivalent

Download 74LS259 8-Bit Addressable Latch Datasheet from the link given below.