MM54C89 - National

MM54C89 64-Bit TRI-STATE Random Access Read/Write Memory

The MM54C89 MM74C89 is a 16-word by 4-bit random access read write memory Inputs to the memory consist of four address lines four data input lines a write enable line and a memory enable line The four binary address inputs are decoded internally to select each of the 16 possible word locations An internal address register latches the address information on t.

Features

Y Y Y Y Y Y Y Wide supply voltage range 3 0V to 15V Guaranteed noise margin 1 0V High noise immunity 0 45 VCC (typ ) Low power fan out of 2 TTL compatibility driving 74L Low power consumption 100 nW package (typ ) Fast access time 130 ns (typ ) at VCC e 10V TRI-STATE output Write Operation Information present at the data inputs is written into the memory at the selected address by bringing write enable and memory enable low Logic and Connection Diagrams Dual-In-Line Package Top View TL F 5888
  – 2 Order Number MM54C89 or MM74C89 TL F 5888
  – 1 TRI-STATE is a registered trademark of Nat.