DESCRIPTION

The 74F189A is a high speed, 64-bit RAM organized as a 16-word by 4-bit array. Address inputs are buffered to minimize loading and are fully decoded on chip. The outputs are in high impedance state whenever the chip enable (CE) is high. The outputs are active only in the READ mode (WE= high) and the output data is the

complement of the stored data.

FEATURES

•High speed performance

•Replaces 74F189

•Address access time: 8ns max vs 28ns for 74F189

•Power dissipation: 4.3mW/bit

•Schottky clamp TTL

•One chip enable

•Inverting outputs (for non-inverting outputs see 74F219A)

•3-State outputs

•74F189A in 150 mil wide SO is preferred options for new designs