CD74HC670 datasheet(2/17 Pages) TAOS

部件名	CD74HC670

功能描述	High-Speed CMOS Logic 4x4 Register File

PDF	17 Pages

Scroll/Zoom	100%

制造商	TAOS [TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS]

网页	http://www.taosinc.com

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2 / 17 page

Functional Diagram

514

RA1

RA0

WA0

WA1

WRITE MODE SELECT TABLE

OPERATING

MODE

INPUTS

INTERNAL

LATCHES

(NOTE 1)

Write Data

Data Latched

No Change

NOTE:

1. The Write Address (WA0 and WA1) to the “internal latches” must

be stable while WE is LOW for conventional operation.

READ MODE SELECT TABLE

OPERATING

MODE

INPUTS

OUTPUT

INTERNAL

LATCHES

(NOTE 2)

Read

Disabled

(Z)

NOTE:

2. The selection of the “internal latches” by Read Address (RA0 and

RA1) are not constrained by WE or RE operation.

H = High Voltage Level

L = Low Voltage Level

X= Don’t Care

Z = High Impedance “Off” State

CD54HC670, CD74HC670, CD74HCT670

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