SN54HC540, SN74HC540

OCTAL BUFFERS AND LINE DRIVERS

WITH 3-STATE OUTPUTS

SCLS007B – MARCH 1984 – REVISED MAY 1997

1

POST OFFICE BOX 655303

Lines Directly or up to 15 LSTTL Loads

Opposite Side From Outputs)

Ceramic Flat (W) Packages, Ceramic Chip

Carriers (FK), and Standard Plastic (N) and

Ceramic (J) 300-mil DIPs

description

These octal buffers and line drivers feature the

performance of the popular ’HC240 series and

offer a pinout with inputs and outputs on opposite

sides of the package. This arrangement greatly

enhances 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

’HC540 provide inverted data at the outputs.

The SN54HC540 is characterized for operation

over the full military temperature range of –55

°C

to 125

°C. The SN74HC540 is characterized for

operation from –40

°C to 85°C.

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

SN54HC540 ...J OR W PACKAGE

SN74HC540 . . . DW OR N PACKAGE

(TOP VIEW)

32 1 20 19

910 11 1213

4

5

6

7

8

18

17

16

15

14

Y1

Y2

Y3

Y4

Y5

A3

A4

A5

A6

A7

SN54HC540 . . . FK PACKAGE

(TOP VIEW)

Copyright

© 1997, 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.