SN54BCT25245, SN74BCT25245

25 Ω OCTAL BUS TRANSCEIVERS

WITH 3STATE OUTPUTS

SCBS053B − MAY 1990 − REVISED APRIL 1994

Copyright

2−1

POST OFFICE BOX 655303

POST OFFICE BOX 1443

MIL-STD-883C, Method 3015; Exceeds

200 V Using Machine Model (C = 200 pF,

R = 0)

Switching for Line Impedances of 25

Ω

or Greater

Noise Generated by the Simultaneous

Switching of Outputs

Small-Outline (DW) Packages, Ceramic

Chip Carriers (FK) and Flatpacks (W), and

Standard Plastic and Ceramic 300-mil DIPs

(JT, NT)

description

The

′BCT25245 is a 25-Ω octal bus transceiver

designed

for

asynchronous

communication

between data buses. It improves both the

performance and density of 3-state memory

address drivers, clock drivers, and bus-oriented

transceivers.

The device allows data transmission 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 can disable the device so that both

buses are effectively isolated.

These transceivers are capable of sinking 188-mA

and GND pins minimize switching noise for more

reliable system operation.

The SN54BCT25245 is characterized for opera-

tion over the full military temperature range of

−55

°C to 125°C. The SN74BCT25245 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

1

2

3

4

5

6

7

8

9

10

11

12

24

23

22

21

20

19

18

17

16

15

14

13

A1

GND

A2

A3

GND

A4

A5

GND

A6

A7

GND

A8

DIR

B1

B2

B3

B4

B5

B6

B7

B8

OE

SN54BCT25245 . . . JT OR W PACKAGE

SN74BCT25245 . . . DW OR NT PACKAGE

(TOP VIEW)

32 1 28 27

12 13

5

6

7

8

9

10

11

25

24

23

22

21

20

19

OE

A8

GND

NC

A7

A6

GND

B3

B2

NC

B1

DIR

A1

426

14 15 16 17 18

SN54BCT25245 . . . FK PACKAGE

(TOP VIEW)

NC − No internal connection

UNLESS OTHERWISE NOTED this document contains PRODUCTION

DATA information 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.