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SN54LVC646A . . . JT OR W PACKAGE

SN74LVC646A . . . DB, DW, NS, OR PW PACKAGE

(TOP VIEW)

CLKAB

SAB

DIR

A1

A2

A3

A4

A5

A6

A7

A8

GND

VCC

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

5

6

7

8

9

10

11

25

24

23

22

21

20

19

4

3

2 1 28

12 13 14 15 16

OE

B1

B2

NC

B3

B4

B5

A1

A2

A3

NC

A4

A5

A6

SN54LVC646A . . . FK PACKAGE

(TOP VIEW)

17 18

27 26

NC - No internal connection

DESCRIPTION/ORDERING INFORMATION

SN54LVC646A, SN74LVC646A

OCTAL BUS TRANSCEIVERS AND REGISTERS

WITH 3-STATE OUTPUTS

SCAS302J – JANUARY 1993 – REVISED AUGUST 2005

•

Operate From 1.65 V to 3.6 V

•

I

off Supports Partial-Power-Down Mode

Operation

•

Inputs Accept Voltages to 5.5 V

•

Latch-Up Performance Exceeds 250 mA Per

•

Max t

pd of 7.4 ns at 3.3 V

JESD 17

•

Typical V

OLP (Output Ground Bounce)

•

ESD Protection Exceeds JESD 22

<0.8 at V

CC = 3.3 V, TA = 25°C

– 2000-V Human-Body Model (A114-A)

•

Typical V

OHV (Output VOH Undershoot)

>2 V at V

CC = 3.3 V, TA = 25°C

– 200-V Machine Model (A115-A)

•

Support Mixed-Mode Signal Operation on All

– 1000-V Charged-Device Model (C101)

Ports (5-V Input/Output Voltage With

xxxx

3.3-V V

CC)

The SN54LVC646A octal bus transceiver and register is designed for 2.7-V to 3.6-V VCC operation, and the

SN74LVC646A octal bus transceiver and register is designed for 1.65-V to 3.6-V VCC operation.

ORDERING INFORMATION

TA

PACKAGE(1)

ORDERABLE PART NUMBER

TOP-SIDE MARKING

Tube of 25

SN74LVC646ADW

SOIC – DW

LVC646A

Reel of 2000

SN74LVC646ADWR

SOP – NS

Reel of 2000

SN74LVC646ANSR

LVC646A

–40

°C to 85°C

SSOP – DB

Reel of 2000

SN74LVC646ADBR

LC646A

Tube of 60

SN74LVC646APW

TSSOP – PW

Reel of 2000

SN74LVC646APWR

LC646A

Reel of 250

SN74LVC646APWT

CDIP – JT

Tube of 15

SNJ54LVC646AJT

SNJ54LVC646AJT

–55

°C to 125°C

CFP – W

Tube of 85

SNJ54LVC646AW

SNJ54LVC646AW

LCCC – FK

Tube of 42

SNJ54LVC646AFK

SNJ54LVC646AFK

(1)

Package drawings, standard packing quantities, thermal data, symboliztion, and PCB design guidelines are available at

www.ti.com/sc/package.

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.

PRODUCTION DATA information is current as of publication date.

Copyright © 1993–2005, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

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

Instruments standard warranty. Production processing does not

tested unless otherwise noted. On all other products, production

necessarily include testing of all parameters.

processing does not necessarily include testing of all parameters.