SN54ABT2952A, SN74ABT2952A

OCTAL BUS TRANSCEIVERS AND REGISTERS

WITH 3-STATE OUTPUTS

SCBS203D – AUGUST 1992 – REVISED JANUARY 1998

1

POST OFFICE BOX 655303

Significantly Reduces Power Dissipation

Data Flowing in Both Directions

JESD 17

MIL-STD-883, Method 3015; Exceeds 200 V

Using Machine Model (C = 200 pF, R = 0)

Small-Outline (DW), Shrink Small-Outline

(DB), and Thin Shrink Small-Outline (PW)

Packages, Ceramic Chip Carriers (FK),

Ceramic Flat (W) Package, and Plastic (NT)

and Ceramic (JT) DIPs

description

The ’ABT2952A transceivers consist of two 8-bit

back-to-back registers that store data flowing in

both directions between two bidirectional buses.

Data on the A or B bus is stored in the registers on

the low-to-high transition of the clock (CLKAB or

CLKBA) input provided that the clock-enable

(CLKENAB or CLKENBA) input is low. Taking the

output-enable (OEAB or OEBA) input low

accesses the data on either port.

To ensure the high-impedance state during power

through a pullup resistor; the minimum value of

the resistor is determined by the current-sinking

capability of the driver.

The

SN54ABT2952A

is

characterized

for

operation over the full military temperature range

of –55

°C to 125°C. The SN74ABT2952A is

characterized for operation from –40

°C to 85°C.

Copyright

© 1998, Texas Instruments Incorporated

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.

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.

EPIC is a trademark of Texas Instruments Incorporated.

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2

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5

6

7

8

9

10

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12

24

23

22

21

20

19

18

17

16

15

14

13

B8

B7

B6

B5

B4

B3

B2

B1

OEAB

CLKAB

CLKENAB

GND

A8

A7

A6

A5

A4

A3

A2

A1

OEBA

CLKBA

CLKENBA

SN54ABT2952A . . . JT OR W PACKAGE

SN74ABT2952A . . . DB, DW, PW, OR NT PACKAGE

(TOP VIEW)

32 1 28 27

12 13 14 15 16 17 18

5

6

7

8

9

10

11

25

24

23

22

21

20

19

A6

A5

A4

NC

A3

A2

A1

B5

B4

B3

NC

B2

B1

OEAB

426

SN54ABT2952A . . . FK PACKAGE

(TOP VIEW)

NC – No internal connection

On products compliant to MIL-PRF-38535, all parameters are tested

unless otherwise noted. On all other products, production

processing does not necessarily include testing of all parameters.