Texas Instruments SN74ACT240DW Bedienungsanleitung

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SN54ACT240, SN74ACT240

OCTAL BUFFERS/DRIVERS

WITH 3-STATE OUTPUTS

SCAS515C − JUNE 1995 − REVISED OCTOBER 2002

1

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

D4.5-V to 5.5-V VCC Operation

DInputs Accept Voltages to 5.5 V

DMax tpd of 8.5 ns at 5 V

DInputs Are TTL Compatible

SN54ACT240 . . . J OR W PACKAGE

SN74ACT240 . . .DB, DW, N, NS, OR PW PACKAGE

(TOP VIEW)

3 2 12019

91012 1311

4

5

6

7

8

18

17

16

15

14

1Y1

2A4

1Y2

2A3

1Y3

1A2

2Y3

1A3

2Y2

1A4

SN54ACT240 . . . FK PACKAGE

(TOP VIEW)

2Y4

1A1

1OE

1Y4

2A2 2OE

2Y1

GND

2A1 VCC

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

VCC

2OE

1Y1

2A4

1Y2

2A3

1Y3

2A2

1Y4

2A1

description/ordering information

These octal buffers and line 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 ’ACT240 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.

To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup

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

ORDERING INFORMATION

TAPACKAGE†ORDERABLE

PART NUMBER

TOP-SIDE

MARKING

PDIP − NTubeSN74ACT240NSN74ACT240N

SOIC DW

Tube SN74ACT240DW

ACT240

40°C t85°C

SOIC − DWTape and reelSN74ACT240DWRACT240

−40° °C to 85CSOP − NSTape and reelSN74ACT240NSRACT240

SSOP − DBTape and reelSN74ACT240DBRAD240

TSSOP − PWTape and reelSN74ACT240PWRAD240

CDIP − JTubeSNJ54ACT240JSNJ54ACT240J

−55° °C to 125CCFP − WTubeSNJ54ACT240WSNJ54ACT240W

LCCC − FKTubeSNJ54ACT240FKSNJ54ACT240FK

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

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

Copyright © 2002, 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.

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.

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