54LS256 DM74LS256 Dual 4-Bit Addressable Latch June 1989 54LS256 DM74LS256 Dual 4-Bit Addressable Latch General Description The ’LS256 is a dual 4-bit addressable latch with common control inputs these include two Address inputs (A0 A1) an active LOW enable input (E) and an active LOW Clear input (CL) Each latch has a Data input (D) and four outputs (Q0 – Q3) When the Enable (E) is HIGH and the Clear input (CL) is LOW all outputs (Q0–Q3) are LOW Dual 4-channel demultiplexing occurs when the CL and E are both LOW When CL is HIGH and E is LOW the selected output (Q0 – Q3) determined by the Address inputs follows D When the E goes HIGH the contents of the latch are stored When operating in th...

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