HD74AC670 Просмотр технического описания (PDF) - Hitachi -> Renesas Electronics

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HD74AC670

4 × 4 Register File with 3-State Output

Hitachi -> Renesas Electronics 

HD74AC670

4 × 4 Register File with 3-State Output

Description

The HD74AC670 contains 16 high speed, low power, transparent D-type latches arranged as four words of

four bits each, to function as a 4 × 4 register file. Separate read and write inputs, both address and enable,

allow simultaneous read and write operation. The 3-state outputs make it possible to connect up to 128

outputs to increase the word capacity up to 512 words. Any number of these devices can be operated in

parallel to generate an n-bit length.

Features

• 3-State Outputs Drive Bus Lines or Buffer Memory Address Registers

• Outputs Source/Sink 24 mA

Pin Arrangement

D2 1

D3 2

D4 3

RA1 4

RA0 5

O4 6

O3 7

GND 8

(Top view)

16 VCC

15 D1

14 WA0

13 WA1

12 WE

11 OE

10 O1

9 O2

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