SN54HCT240, SN74HCT240

OCTAL BUFFERS AND LINE DRIVERS

WITH 3-STATE OUTPUTS

SCLS174C – MARCH 1984 – REVISED FEBRUARY 2000

1

POST OFFICE BOX 655303

Memory Address Registers

Loads

Small-Outline (DW), Thin Shrink

Small-Outline (PW), and Ceramic Flat (W)

Packages, Ceramic Chip Carriers (FK), and

Standard Plastic (N) and Ceramic (J) DIPs

description

These octal buffers and line drivers are designed

specifically to improve both the performance and

density of 3-state memory address drivers, clock

drivers,

and

bus-oriented

receivers

and

transmitters. The ’HCT240 devices are organized

as

two

4-bit

buffers/drivers

with

separate

output-enable (OE) inputs. When OE is low, the

device passes inverted data from the A inputs to

the Y outputs. When OE is high, the outputs are

in the high-impedance state.

The SN54HCT240 is characterized for operation

over the full military temperature range of –55

°C

to 125

°C. The SN74HCT240 is characterized for

operation from –40

°C to 85°C.

FUNCTION TABLE

(each buffer/driver)

INPUTS

OUTPUT

OE

A

Y

L

H

L

L

LH

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

1OE

1A1

2Y4

1A2

2Y3

1A3

2Y2

1A4

2Y1

GND

2OE

1Y1

2A4

1Y2

2A3

1Y3

2A2

1Y4

2A1

SN54HCT240 ...J OR W PACKAGE

SN74HCT240 ...DW, N, OR PW PACKAGE

(TOP VIEW)

32

1 20 19

910 11 12 13

4

5

6

7

8

18

17

16

15

14

1Y1

2A4

1Y2

2A3

1Y3

1A2

2Y3

1A3

2Y2

1A4

SN54HCT240 . . . FK PACKAGE

(TOP VIEW)

Copyright

© 2000, 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.