74LCX16652MTD_Q データシートの表示（PDF） - Fairchild Semiconductor

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74LCX16652MTD_Q

Low Voltage Transceiver/Register with 5V Tolerant Inputs and Outputs

Fairchild Semiconductor 

Connection Diagram

Truth Table

(Note 2)

Inputs

OEAB OEBA1 CPAB1 CPBA1 SAB1 SBA1

Inputs/Outputs

A0 thru A7

B0 thru B7

Operating Mode

L

L

X

H

L

L

H

H

H

H

X

L

H or L H or L

 H or L

  H or L

X

X

X

X

X

X

X

Input

Input

Isolation

X

Store A and B Data

X

Input

Not Specified Store A, Hold B

X

Input

Output

Store A in Both Registers

X

Not Specified

Input

Hold A, Store B

X

Output

Input

Store B in Both Registers

L

L

X

X

X

L

Output

Input

Real-Time B Data to A Bus

L

L

X H or L X

H

Store B Data to A Bus

H

H

X

X

L

X

Input

Output

Real-Time A Data to B Bus

H

H H or L X

H

X

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 2: 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. This also applies to data I/O (A and B: 8–15) and #2 control pins.

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