SN74F2245

25-

Ω OCTAL BUS TRANSCEIVER

WITH 3-STATE OUTPUTS

SDFS099 – MAY 1995

1

POST OFFICE BOX 655303

Memory Address Registers

Small-Outline (DB) Packages and Plastic

300-mil DIPs (N)

description

The SN74F2245 is designed for asynchronous

communication between data buses. The devices

transmit data from the A bus to the B bus or from

the B bus to the A bus depending upon the logic

level at the direction-control (DIR) input. The

output-enable (OE) input disables the device so

the buses are effectively isolated.

Both A and B outputs can sink up to 12 mA; 25-

Ω resistors are included in the lower output circuit to reduce

overshoot and undershoot.

The SN74F2245 is characterized for operation from 0

°C to 70°C.

FUNCTION TABLE

INPUTS

OPERATION

OE

DIR

OPERATION

L

L

B data to A bus

L

H

A data to B bus

H

X

Isolation

logic diagram (positive logic)

A5

6

A6

7

A7

8

A8

9

A2

3

A3

4

A4

5

OE

A1

2

G3

19

3EN2[AB]

B5

14

B6

13

B7

12

B8

11

B1

18

B2

17

B3

16

B4

15

3EN1[BA]

1

DIR

DIR

OE

A1

B1

1

2

18

19

To Seven Other Channels

1

2

† This symbol is in accordance with ANSI/IEEE Std 91-1984 and

IEC Publication 617-12.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

1

2

3

4

5

6

7

8

9

10

20

19

18

17

16

15

14

13

12

11

DIR

A1

A2

A3

A4

A5

A6

A7

A8

GND

OE

B1

B2

B3

B4

B5

B6

B7

B8

DB OR N PACKAGE

(TOP VIEW)

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

Copyright

© 1995, Texas Instruments Incorporated