HD74HC670 Datasheet (Hitachi Semiconductor)

HD74HC670, 4-by-4 Register

The HD74HC670, 16-bit register file is 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 simultaneous writing into one location and reading from another word location.

Four data input

HD74HC670 Features

* High Speed Operation: tpd (Read Select to Q) = 21 ns typ (CL = 50 pF) High Output Current: Fanout of 15 LSTTL Loads Wide Operating Voltage: VCC = 2 to 6 V Low Input Current: 1 µA max Low Quiescent Supply Current: ICC (static) = 4 µA max (Ta = 25°C)