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

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Компоненты Описание

Список матч

HD74AC670

4 × 4 Register File with 3-State Output

Hitachi -> Renesas Electronics 

HD74AC670

Logic Symbol

12 15 1 2 3

WE D1 D2 D3 D4

14

WA0

13

WA1

5

RA0

4

RA0

OE O1 O2 O3 O4

11 10 9 7 6

VCC=Pin 16

GND=Pin 8

Pin Names

D1 to D4

WA0, WA1

WE

RA0, RA1

OE

O1 to O4

Data Inputs

Write Address Inputs

Write Enable Input (Active Low)

Read Address Inputs

3-State Output Enable Input (Active Low)

Data Outputs

Write Function Table

Write Inputs

WE

WA1

L

L

L

L

L

H

L

H

H

X

H : High Voltage Level

L : Low Voltage Level

X : Immaterial

WA0

L

H

L

H

X

D Inputs to

Word 0

Word 1

Word 2

Word 3

None (hold)

2

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