SN54ACT1284, SN74ACT1284

7BIT BUS INTERFACES

WITH 3STATE OUTPUTS

SCAS459D − NOVEMBER 1994 − REVISED OCTOBER 2003

1

POST OFFICE BOX 655303

Layout

Minimize High-Speed Switching Noise

− 2000-V Human-Body Model (A114-A)

− 200-V Machine Model (A115-A)

and IEEE 1284-II (Level-2 Type) Electrical

Specifications

description/ordering information

The

’ACT1284

devices

are

designed

for

asynchronous two-way communication between

data buses. The control function minimizes

external timing requirements.

The devices allow data transmission in either the

A-to-B or the B-to-A direction for bits 1, 2, 3, and

4,

depending

on

the

logic

level

at

the

direction-control (DIR) input. Bits 5, 6, and 7,

however, always transmit in the A-to-B direction.

The output drive for each mode is determined by the high-drive (HD) control pin. When HD is high, the high drive

is delivered by the totem-pole configuration, and when HD is low, the outputs are open drain. This meets the

drive requirements as specified in the IEEE 1284-I (level-1 type) and the IEEE 1284-II (level-2 type) parallel

peripheral-interface specification.

ORDERING INFORMATION

TA

PACKAGE†

ORDERABLE

PART NUMBER

TOP-SIDE

MARKING

SOIC − DW

Tube

SN74ACT1284DW

ACT1284

SOIC − DW

Tape and reel

SN74ACT1284DWR

ACT1284

0

°C to 70°C

SOP − NS

Tape and reel

SN74ACT1284NSR

ACT1284

0

°C to 70°C

SSOP − DB

Tape and reel

SN74ACT1284DBR

AU284

TSSOP − PW

Tube

SN74ACT1284PW

AU284

TSSOP − PW

Tape and reel

SN74ACT1284PWR

AU284

CDIP − J

Tube

SNJ54ACT1284J

SNJ54ACT1284J

−55

°C to 125°C

CFP − W

Tube

SNJ54ACT1284W

SNJ54ACT1284W

−55 C to 125 C

LCCC − FK

Tube

SNJ54ACT1284FK

SNJ54ACT1284FK

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

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

Copyright

 2003, Texas Instruments Incorporated

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.

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

A1

A2

A3

A4

GND

GND

A5

A6

A7

DIR

B1

B2

B3

B4

B5

B6

B7

HD

SN54ACT1284 ...J OR W PACKAGE

SN74ACT1284 . . . DB, DW, NS, OR PW PACKAGE

(TOP VIEW)

32

1 20 19

9 10 11 12 13

4

5

6

7

8

18

17

16

15

14

B3

B4

B5

A4

GND

GND

A5

A6

SN54ACT1284 . . . FK PACKAGE

(TOP VIEW)