General Description

These register files are organized as 4 words of 4 bits each, and separate on-chip decoding is provided for addressing the four word locations to either write-in or retrieve data. This permits writing into one location, and reading from another word location, simultaneously.

Features

■ For use as:

Scratch pad memory

Buffer storage between processors

Bit storage in fast multiplication designs

■ Separate read/write addressing permits simultaneous

reading and writing

■ Organized as 4 words of 4 bits

■ Expandable to 512 words of n-bits

■ 3-STATE versions of DM74LS170

■ Fast access times 20 ns typ