SN54HCT240, SN74HCT240

OCTAL BUFFERS AND LINE DRIVERS

WITH 3STATE OUTPUTS

SCLS174E − MARCH 1984 − REVISED AUGUST 2003

1

POST OFFICE BOX 655303

LSTTL Loads

Memory Address Registers

description/ordering information

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.

ORDERING INFORMATION

TA

PACKAGE†

ORDERABLE

PART NUMBER

TOP-SIDE

MARKING

PDIP − N

Tube of 20

SN74HCT240N

SN74HCT240N

SOIC − DW

Tube of 25

SN74HCT240DW

HCT240

SOIC − DW

Reel of 2000

SN74HCT240DWR

HCT240

−40

°C to 85°C

SOP − NS

Reel of 2000

SN74HCT240NSR

HCT240

−40 C to 85 C

Tube of 70

SN74HCT240PW

TSSOP − PW

Reel of 2000

SN74HCT240PWR

HT240

TSSOP − PW

Reel of 250

SN74HCT240PWT

HT240

CDIP − J

Tube of 20

SNJ54HCT240J

SNJ54HCT240J

−55

°C to 125°C

CFP − W

Tube of 85

SNJ54HCT240W

SNJ54HCT240W

−55 C to 125 C

LCCC − FK

Tube of 55

SNJ54HCT240FK

SNJ54HCT240FK

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

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

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, NS, 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

 2003, Texas Instruments Incorporated

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.

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 MILPRF38535, all parameters are tested

unless otherwise noted. On all other products, production

processing does not necessarily include testing of all parameters.