Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsLogic ICsLogic IC - Buffer, driver PDIP 20

SN54ALS240A, SN54AS240A, SN74ALS240A, SN74AS240A

OCTAL BUFFERS/DRIVERS

WITH 3-STATE OUTPUTS

SDAS214E – DECEMBER 1982 – REVISED AUGUST 2002

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

3-State Outputs Drive Bus Lines or Buffer

Memory Address Registers

pnp Inputs Reduce dc Loading

description/ordering information

These octal buffers/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. When these devices are used with

the ’ALS241, ’AS241A, ’ALS244, and ’AS244A

devices, the circuit designer has a choice of

selected combinations of inverting and

noninverting outputs, symmetrical active-low

output-enable (OE

) inputs, and complementary

OE and OE

inputs. These devices feature high

fan-out and improved fan-in.

The -1 version of SN74ALS240A is identical to the

standard version, except that the recommended

maximum I

for the -1 version is 48 mA. There is

no -1 version of the SN54ALS240A.

ORDERING INFORMATION

PACKAGE

†

ORDERABLE

PART NUMBER

TOP-SIDE

MARKING

SN74ALS240AN SN74ALS240AN

PDIP – N Tube

SN74ALS240A-1N SN74ALS240A-1N

SN74AS240AN SN74AS240AN

Tube SN74ALS240ADW

ALS240A

Tape and reel SN74ALS240ADWR

ALS240A

SOIC DW

Tube SN74ALS240A-1DW

ALS240A 1

0°C to 70°C

SOIC

–

Tape and reel SN74ALS240A-1DWR

ALS240A

Tube SN74AS240ADW

AS240A

Tape and reel SN74AS240ADWR

AS240A

SOP NS

e and reel

SN74ALS240ANSR ALS240A

SOP

–

Tape

and

reel

SN74ALS240A-1NSR ALS240A-1

SSOP DB

e and reel

SN74ALS240ADBR G240A

SSOP

–

Tape

and

reel

SN74ALS240A-1DBR G240A-1

†

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

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

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.

1OE

1A1

2Y4

1A2

2Y3

1A3

2Y2

1A4

2Y1

GND

2OE

1Y1

2A4

1Y2

2A3

1Y3

2A2

1Y4

2A1

SN54ALS240A, SN54AS240A ...J OR W PACKAGE

SN74ALS240A . . . DB, DW, N, OR NS PACKAGE

SN74AS240A . . . DW OR N PACKAGE

(TOP VIEW)

3 2 1 20 19

910111213

1Y1

2A4

1Y2

2A3

1Y3

1A2

2Y3

1A3

2Y2

1A4

SN54ALS240A, SN54AS240A . . . FK PACKAGE

(TOP VIEW)

2Y4

1A1

1OE

1Y4

2A2 2OE

2Y1

GND

2A1

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.

Summary of content (21 pages)

PAGE 1
SN54ALS240A, SN54AS240A, SN74ALS240A, SN74AS240A OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS SDAS214E – DECEMBER 1982 – REVISED AUGUST 2002 D SN54ALS240A, SN54AS240A . . . J OR W PACKAGE SN74ALS240A . . . DB, DW, N, OR NS PACKAGE SN74AS240A . . .
PAGE 2
SN54ALS240A, SN54AS240A, SN74ALS240A, SN74AS240A OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS SDAS214E – DECEMBER 1982 – REVISED AUGUST 2002 description/ordering information (continued) ORDERING INFORMATION –55°C 55°C to 125°C ORDERABLE PART NUMBER PACKAGE† TA CDIP – J Tube CFP – W Tube LCCC – FK Tube TOP-SIDE MARKING SNJ54ALS240AJ SNJ54ALS240AJ SNJ54AS240AJ SNJ54AS240AJ SNJ54ALS240AW SNJ54ALS240AW SNJ54AS240AW SNJ54AS240AW SNJ54ALS240AFK SNJ54ALS240AFK SNJ54AS240AFK SNJ54AS240AFK † Pac
PAGE 3
SN54ALS240A, SN54AS240A, SN74ALS240A, SN74AS240A OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS SDAS214E – DECEMBER 1982 – REVISED AUGUST 2002 logic diagram (positive logic) 1OE 1A1 1A2 1A3 1A4 2OE 2A1 2A2 2A3 2A4 1 2 18 4 16 6 14 8 12 1Y1 1Y2 1Y3 1Y4 19 11 9 13 7 15 5 17 3 2Y1 2Y2 2Y3 2Y4 absolute maximum ratings over operating free-air temperature range (unless otherwise noted)† Supply voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PAGE 4
SN54ALS240A, SN54AS240A, SN74ALS240A, SN74AS240A OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS SDAS214E – DECEMBER 1982 – REVISED AUGUST 2002 recommended operating conditions VCC VIH Supply voltage High-level input voltage VIL Low level input voltage Low-level IOH High level output current High-level IOL TA MIN NOM MAX 4.5 5 5.5 2 Low-level output current Operating O erating free-air temperature tem erature UNIT V V SN54ALS240A 0.7 SN74ALS240A, ’AS240A 0.
PAGE 5
SN54ALS240A, SN54AS240A, SN74ALS240A, SN74AS240A OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS SDAS214E – DECEMBER 1982 – REVISED AUGUST 2002 electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER VIK VCC = 4.5 V, VCC = 4 4.5 5 V to 5.5 55V VCC = 4 4.5 5V IOZH IOZL VCC = 5.5 V, VCC = 5.5 V, II IIH VCC = 5.5 V, VCC = 5.5 V, A inputs SN74AS240A TYP† MAX MIN – 1.2 VCC – 2 2.4 IOH = – 3 mA IOH = – 12 mA VCC = 4 4.
PAGE 6
SN54ALS240A, SN54AS240A, SN74ALS240A, SN74AS240A OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS SDAS214E – DECEMBER 1982 – REVISED AUGUST 2002 switching characteristics (see Figure 1) PARAMETER FROM (INPUT) VCC = 4.5 V to 5.5 V, CL = 50 pF, R1 = 500 Ω, R2 = 500 Ω, TA = MIN to MAX† TO (OUTPUT) SN54AS240A tPLH tPHL A Y tPZH tPZL OE Y tPHZ tPLZ OE Y SN74AS240A MIN MAX MIN MAX 1 7 1 6.5 1.2 6.5 1.2 6.5 1 7 1 6.4 1.1 9.5 1.1 9 1.2 5.5 1.2 5 1.5 12.5 1.5 9.
PAGE 7
SN54ALS240A, SN54AS240A, SN74ALS240A, SN74AS240A OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS SDAS214E – DECEMBER 1982 – REVISED AUGUST 2002 PARAMETER MEASUREMENT INFORMATION SERIES 54ALS/74ALS AND 54AS/74AS DEVICES 7V RL = R1 = R2 VCC S1 RL R1 Test Point From Output Under Test CL (see Note A) From Output Under Test RL Test Point From Output Under Test CL (see Note A) CL (see Note A) LOAD CIRCUIT FOR BI-STATE TOTEM-POLE OUTPUTS LOAD CIRCUIT FOR OPEN-COLLECTOR OUTPUTS 3.
PAGE 8
PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 25-Sep-2013 Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties.
PAGE 12
PACKAGE MATERIALS INFORMATION www.ti.com 14-Jul-2012 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant SN74ALS240A-1NSR SO NS 20 2000 330.0 24.4 8.2 13.0 2.5 12.0 24.0 Q1 SN74ALS240ADWR SOIC DW 20 2000 330.0 24.4 10.8 13.0 2.7 12.0 24.0 Q1 SN74ALS240ANSR SO NS 20 2000 330.0 24.4 8.2 13.0 2.5 12.0 24.
PAGE 13
PACKAGE MATERIALS INFORMATION www.ti.com 14-Jul-2012 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) SN74ALS240A-1NSR SO NS 20 2000 367.0 367.0 45.0 SN74ALS240ADWR SOIC DW 20 2000 367.0 367.0 45.0 SN74ALS240ANSR SO NS 20 2000 367.0 367.0 45.0 SN74AS240ADWR SOIC DW 20 2000 367.0 367.0 45.0 SN74AS240ANSR SO NS 20 2000 367.0 367.0 45.
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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.