MC74AC646DWR2G Ver la hoja de datos (PDF) - ON Semiconductor

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MC74AC646DWR2G

Octal Transceiver/Register with 3-State Outputs (Non-inverting)

ON Semiconductor 

MC74AC646, MC74ACT646

FUNCTION TABLE

Inputs

G

DIR CAB CBA SAB SBA

Data I/O*

A0−A7

B0−B7

Operation or Function

H

X

H or L H or L

X

X

H

X

X

X

Input

Input

Isolation

Store A and B Data

L

L

L

X

X

X

L

L

X

X

X

H

Output

Input

Real Time B Data to A Bus

Stored B Data to A Bus

L

H

X

X

L

X

L

H

H or L

X

H

X

Input

Output

Real Time A Data to B Bus

Stored A Data to B Bus

*The data output functions may be enabled or disabled by various signals at the G and DIR inputs. Data input functions are always enabled;

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

NOTE: H = HIGH Voltage Level; L = LOW Voltage Level; X = Immaterial; = LOW−to−HIGH Transition

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