74F641 データシートの表示（PDF） - Philips Electronics

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74F641

Transceivers

Philips Electronics 

Philips Semiconductors

Transceivers

Product specification

74F641/74F642*

LOGIC DIAGRAM – 74F641

T/R 1

OE 19

A0 2

A1 3

A2 4

A3 5

A4 6

A5 7

A6 8

A7 9

VCC = Pin 20

GND = Pin 10

18 B0

17 B1

16

B2

15 B3

14 B4

13

B5

12 B6

11 B7

SF01149

FUNCTION TABLE – 74F641

INPUTS

INPUTS/OUTPUTS

OE

T/R

An

Bn

L

L

A=B

INPUTS

H

H

INPUTS

B=A

H

X

OFF

OFF

H = High voltage level

L = Low voltage level

X = Don’t care

OFF= High if pull-up resistor is connected to open collector output

LOGIC DIAGRAM – 74F642

T/R 1

OE 19

A0 2

A1 3

A2 4

A3 5

A4 6

A5 7

A6 8

A7 9

VCC = Pin 20

GND = Pin 10

18 B0

17 B1

16

B2

15 B3

14 B4

13

B5

12 B6

11 B7

SF01150

FUNCTION TABLE – 74F642

INPUTS

INPUTS/OUTPUTS

OE

T/R

An

Bn

L

L

A=B

INPUTS

H

H

INPUTS

B=A

H

X

OFF

OFF

H = High voltage level

L = Low voltage level

X = Don’t care

OFF= High if pull-up resistor is connected to open collector output

* Discontinued part. Please see the Discontinued Products List.

1999 Jan 08

4

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