SN54AHCT240, SN74AHCT240

OCTAL BUFFERS/DRIVERS

WITH 3-STATE OUTPUTS

SCLS252K – OCTOBER 1995 – REVISED JULY 2003

1

POST OFFICE BOX 655303

JESD 17

description/ordering information

These

octal

buffers/drivers

are

designed

specifically to improve the performance and

density of 3-state memory-address drivers, clock

drivers,

and

bus-oriented

receivers

and

transmitters.

The ’AHCT240 devices are organized as two 4-bit

buffers/line drivers with separate output-enable

(OE) inputs. When OE is low, the device passes

data from the A inputs to the Y outputs. When OE

is high, the outputs are in the high-impedance

state.

To ensure the high-impedance state during power

through a pullup 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

SN74AHCT240N

SN74AHCT240N

SOIC – DW

Tube

SN74AHCT240DW

AHCT240

SOIC – DW

Tape and reel

SN74AHCT240DWR

AHCT240

–40

°Cto85°C

SOP – NS

Tape and reel

SN74AHCT240NSR

AHCT240

–40

°C to 85°C

SSOP – DB

Tape and reel

SN74AHCT240DBR

HB240

TSSOP

PW

Tube

SN74AHCT240PW

HB240

TSSOP – PW

Tape and reel

SN74AHCT240PWR

HB240

TVSOP – DGV

Tape and reel

SN74AHCT240DGVR

HB240

CDIP – J

Tube

SNJ54AHCT240J

SNJ54AHCT240J

–55

°C to 125°C

CFP – W

Tube

SNJ54AHCT240W

SNJ54AHCT240W

LCCC – FK

Tube

SNJ54AHCT240FK

SNJ54AHCT240FK

† 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

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.

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

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

SN54AHCT240 ...J OR W PACKAGE

SN74AHCT240 . . . DB, DGV, DW, N, NS, OR PW PACKAGE

(TOP VIEW)

SN54AHCT240 . . . FK PACKAGE

(TOP VIEW)

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.