The datasheet details the functions and features of the MC74AC256/74ACT256 dual addressable latch, including operating modes, pin definitions, logic symbols, and application circuits.
This document is a technical datasheet for the Motorola MC74AC256 and MC74ACT256, which are dual 4-bit addressable latches. The device features four distinct modes of operation selectable via Clear and Enable inputs, including addressable latch, memory, dual 1-of-4 decoding, and clear modes. It combines a dual demultiplexer with an 8-bit latch and offers serial-to-parallel capability.
| Supply Voltage (Vcc) | -0.5 to +7.0 V |
|---|---|
| Storage Temperature | -65 to +150 °C |
| Operating Ambient Temperature | -40 to +85 °C |
| Input Capacitance | 45 pF |
| Power Dissipation Capacitance | 30.0 pF |
It is selected by controlling the Clear and Enable inputs.
The maximum DC input current per pin is +20 mA.