SN54HCT540, SN74HCT540

OCTAL BUFFERS AND LINE DRIVERS

WITH 3-STATE OUTPUTS

SCLS008C – MARCH 1984 – REVISED MARCH 2003

1

POST OFFICE BOX 655303

Directly With System Bus or Can Drive Up

To 15 LSTTL Loads

Opposite Side From Outputs)

description/ordering information

These octal buffers and line drivers are designed to have the performance of the ’HCT240 devices and a pinout

with inputs and outputs on opposite sides of the package. This arrangement greatly facilitates printed circuit

board layout.

The 3-state control gate is a 2-input NOR. If either output-enable (OE1 or OE2) input is high, all eight outputs

are in the high-impedance state. The ’HCT540 devices provide inverted data at the outputs.

resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.

ORDERING INFORMATION

TA

PACKAGE†

ORDERABLE

PART NUMBER

TOP-SIDE

MARKING

PDIP – N

Tube

SN74HCT540N

SN74HCT540N

–40

°C to 85°C

SOIC

DW

Tube

SN74HCT540DW

HCT540

SOIC – DW

Tape and reel

SN74HCT540DWR

HCT540

–55

°C to 125°C

CDIP – J

Tube

SNJ54HCT540J

SNJ54HCT540J

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

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

FUNCTION TABLE

(each buffer/driver)

INPUTS

OUTPUT

OE1

OE2

A

Y

L

L

L

H

L

LH

L

H

XX

Z

X

H

X

Z

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

OE1

A1

A2

A3

A4

A5

A6

A7

A8

GND

OE2

Y1

Y2

Y3

Y4

Y5

Y6

Y7

Y8

SN54HCT540 ...J PACKAGE

SN74HCT540 . . . DW OR N PACKAGE

(TOP VIEW)

Copyright

 2003, 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.

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.