SN54ABT646A, SN74ABT646A

OCTAL BUS TRANSCEIVERS AND REGISTERS

WITH 3STATE OUTPUTS

SCBS069H − JULY 1991 − REVISED MAY 2004

1

POST OFFICE BOX 655303

Operation

JEDEC Standard JESD-17

− 2000-V Human-Body Model (A114-A)

− 200-V Machine Model (A115-A)

SN54ABT646A ...JT OR W PACKAGE

SN74ABT646A . . . DB, DGV, DW, NS, NT, OR PW PACKAGE

(TOP VIEW)

5

6

7

8

9

10

11

25

24

23

22

21

20

19

43

2 1 28

12 13 14 15 16

OE

B1

B2

NC

B3

B4

B5

A1

A2

A3

NC

A4

A5

A6

SN54ABT646A . . . FK PACKAGE

(TOP VIEW)

17 18

27 26

CLKAB

SAB

DIR

A1

A2

A3

A4

A5

A6

A7

A8

GND

CLKBA

SBA

OE

B1

B2

B3

B4

B5

B6

B7

B8

1

2

3

4

5

6

7

8

9

10

11

12

24

23

22

21

20

19

18

17

16

15

14

13

NC − No internal connection

description/ordering information

These devices consist of bus-transceiver circuits, D-type flip-flops, and control circuitry arranged for multiplexed

transmission of data directly from the input bus or from the internal registers. Data on the A or B bus is clocked

into the registers on the low-to-high transition of the appropriate clock (CLKAB or CLKBA) input. Figure 1

illustrates the four fundamental bus-management functions that can be performed with the ’ABT646A devices.

ORDERING INFORMATION

TA

PACKAGE†

ORDERABLE

PART NUMBER

TOP-SIDE

MARKING

PDIP − NT

Tube

SN74ABT646ANT

SN74ABT646ANT

SOIC − DW

Tube

SN74ABT646ADW

ABT646A

SOIC − DW

Tape and reel

SN74ABT646ADWR

ABT646A

−40

°C to 85°C

SOP − NS

Tape and reel

SN74ABT646ANSR

ABT646A

−40

°C to 85°C

SSOP − DB

Tape and reel

SN74ABT646ADBR

AB646A

TSSOP − PW

Tube

SN74ABT646APW

AB646A

TSSOP − PW

Tape and reel

SN74ABT646APWR

AB646A

TVSOP − DGV

Tape and reel

SN74ABT646ADGVR

AB646A

CDIP − JT

Tube

SNJ54ABT646AJT

SNJ54ABT646AJT

−55

°C to 125°C

CFP − W

Tube

SNJ54ABT646AW

SNJ54ABT646AW

−55 C to 125 C

LCCC − FK

Tube

SNJ54ABT646AFK

SNJ54ABT646AFK

† Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are

available at www.ti.com/sc/package.

Copyright

 2004, 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.

On products compliant to MILPRF38535, all parameters are tested

unless otherwise noted. On all other products, production

processing does not necessarily include testing of all parameters.