74ACTQ652 查看數據表（PDF） - Fairchild Semiconductor

零件编号

产品描述 (功能)

比赛名单

74ACTQ652

Quiet Series™ Transceiver/Register

Fairchild Semiconductor 

Function Table

Inputs

OEAB OEBA CPAB CPBA

SAB

SBA

Inputs/Outputs (Note 1)

A0 thru A7

B0 thru B7

Operating Mode

L

H

H or L H or L

X

X

Isolation

L

H 

X

X

Input

Input

Store A and B Data

X

H

 H or L

X

X

Input

Not Specified Store A, Hold B

H

H 

X

X

Input

Output

Store A in Both Registers

L

X

 H or L

X

X

Not Specified

Input

Hold A, Store B

L

L  X

X

Output

Input

Store B in Both Registers

L

L

X

X

X

L

L

L

X

H or L

X

H

Output

Input

Real-Time B Data to A Bus

Store B Data to A Bus

H

H

X

X

L

X

H

H

H or L

X

H

X

Input

Output

Real-Time A Data to B Bus

Stored A Data to B Bus

H

L

H or L H or L

H

H

Output

Output

Stored A Data to B Bus and

Stored B Data to A Bus

H = HIGH Voltage Level

L = LOW Voltage Level

X = Immaterial

= LOW-to-HIGH Clock Transition

Note 1: The data output functions may be enabled or disabled by various signals at OEAB or OEBA inputs. Data input functions are always enabled,

i.e., data at the bus pins will be stored on every LOW-to-HIGH transition on the clock inputs.

Logic Diagram

Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays.

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