74LS670 Datasheet | Fairchild Semiconductor

DM74LS670 3-STATE 4-by-4 Register File August 1986 Revised March 2000 DM74LS670 3-STATE 4-by-4 Register File 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. Four data inputs are available to supply the word to be stored. Location of the word is determined by the write select inputs A and B, in conjunction with a write-enable signal. Data applied at the inputs should be in its true form. That is, if a high level signal is desired from the...