MM54C89J中文资料64-Bit TRI-STATE Random Access Read/Write Memory数据手册TI规格书

描述 Description

General Description
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 the positive to negative transition of the memory enable input. The four TRI-STATE data output lines working in conjunction with the memory enable input provide for easy memory expansion.

特性 Features

■ 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