74ABT2245DB 查看數據表（PDF） - Philips Electronics

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74ABT2245DB

Octal transceiver with direction pin with 30Ω series termination resistors (3-State)

Philips Electronics 

Philips Semiconductors

Octal transceiver with direction pin

and 30Ω series termination resistors (3-State)

Product specification

74ABT2245

LOGIC SYMBOL

1

DIR

2

A0

3

A1

4

A2

5

A3

6

A4

7

A5

8

A6

9

A7

19

OE

18

B0

17

B1

16

B2

15

B3

14

B4

13

B5

12

B6

11

B7

SA00122

LOGIC SYMBOL IEEE/IEC

19

G3

3 EN1 (BA)

1

3 EN2 (AB)

1

2

2

18

3

17

4

16

5

15

6

14

7

13

8

12

9

11

SA00313

FUNCTION TABLE

INPUTS

OE

DIR

L

L

L

H

H

X

INPUTS/OUTPUTS

An

Bn

An = Bn

Inputs

Inputs

Bn = An

Z

Z

H = High voltage level

L = Low voltage level

X = Don’t care

Z = High impedance ”off” state

SCHEMATIC OF EACH OUTPUT

VCC

OUTPUT

SA00237

1998 Jan 16

3

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