Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsLogic ICsLogic IC - Buffer, driver PDIP 20

SN54AHCT240, SN74AHCT240

OCTAL BUFFERS/DRIVERS

WITH 3-STATE OUTPUTS

SCLS252K – OCTOBER 1995 – REVISED JULY 2003

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

Inputs Are TTL-Voltage Compatible

Latch-Up Performance Exceeds 250 mA Per

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

up or power down, OE

should be tied to V

through a pullup resistor; the minimum value of

the resistor is determined by the current-sinking

capability of the driver.

ORDERING INFORMATION

PACKAGE

†

ORDERABLE

PART NUMBER

TOP-SIDE

MARKING

PDIP – N Tube SN74AHCT240N SN74AHCT240N

SOIC – DW

Tube SN74AHCT240DW

AHCT240

SOIC

–

Tape and reel SN74AHCT240DWR

AHCT240

–40

Cto85

SOP – NS Tape and reel SN74AHCT240NSR AHCT240

–

40°C

85°C

SSOP – DB Tape and reel SN74AHCT240DBR HB240

TSSOP PW

Tube SN74AHCT240PW

HB240

TSSOP

–

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.

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

3212019

910111213

1Y1

2A4

1Y2

2A3

1Y3

1A2

2Y3

1A3

2Y2

1A4

2Y4

1A1

1OE

1Y4

2A2 2OE

2Y1

GND

2A1

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.

Summary of content (21 pages)

PAGE 1
SN54AHCT240, SN74AHCT240 OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS SCLS252K – OCTOBER 1995 – REVISED JULY 2003 SN54AHCT240 . . . J OR W PACKAGE SN74AHCT240 . . .
PAGE 2
SN54AHCT240, SN74AHCT240 OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS SCLS252K – OCTOBER 1995 – REVISED JULY 2003 FUNCTION TABLE (each 4-bit buffer/driver) INPUTS OUTPUT Y OE A L H L L L H H X Z logic diagram (positive logic) 1OE 1A1 1A2 1A3 1A4 1 2OE 2 18 4 16 6 14 8 12 1Y1 2A1 1Y2 2A2 1Y3 2A3 1Y4 2A4 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 range, VCC .
PAGE 3
SN54AHCT240, SN74AHCT240 OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS SCLS252K – OCTOBER 1995 – REVISED JULY 2003 recommended operating conditions (see Note 3) SN54AHCT240 SN74AHCT240 MIN MAX MIN MAX 4.5 5.5 4.5 5.5 UNIT VCC VIH Supply voltage VIL VI Low-level input voltage 0.8 V Input voltage 0 5.5 0 5.5 V VO IOH Output voltage 0 0 VCC –8 V High-level output current VCC –8 mA IOL TA Low-level output current 8 8 mA 85 °C High-level input voltage 2 2 0.
PAGE 4
SN54AHCT240, SN74AHCT240 OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS SCLS252K – OCTOBER 1995 – REVISED JULY 2003 switching characteristics over recommended operating free-air temperature range, VCC = 5 V ± 0.
PAGE 5
SN54AHCT240, SN74AHCT240 OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS SCLS252K – OCTOBER 1995 – REVISED JULY 2003 PARAMETER MEASUREMENT INFORMATION From Output Under Test RL = 1 kΩ From Output Under Test Test Point S1 VCC Open TEST GND CL (see Note A) CL (see Note A) S1 tPLH/tPHL tPLZ/tPZL tPHZ/tPZH Open Drain Open VCC GND VCC LOAD CIRCUIT FOR 3-STATE AND OPEN-DRAIN OUTPUTS LOAD CIRCUIT FOR TOTEM-POLE OUTPUTS 3V 1.5 V Timing Input 0V tw 3V 1.5 V Input 1.5 V th tsu 3V 1.
PAGE 6
PACKAGE OPTION ADDENDUM www.ti.
PAGE 7
PACKAGE OPTION ADDENDUM www.ti.
PAGE 8
PACKAGE OPTION ADDENDUM www.ti.com 25-Sep-2013 Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
PAGE 9
PACKAGE MATERIALS INFORMATION www.ti.com 8-Apr-2013 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 SN74AHCT240DBR SSOP DB 20 2000 330.0 16.4 8.2 7.5 2.5 12.0 16.0 Q1 SN74AHCT240DWR SOIC DW 20 2000 330.0 24.4 10.8 13.3 2.7 12.0 24.0 Q1 SN74AHCT240NSR SO NS 20 2000 330.0 24.4 8.2 13.0 2.5 12.0 24.
PAGE 10
PACKAGE MATERIALS INFORMATION www.ti.com 8-Apr-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) SN74AHCT240DBR SSOP DB 20 2000 367.0 367.0 38.0 SN74AHCT240DWR SOIC DW 20 2000 367.0 367.0 45.0 SN74AHCT240NSR SO NS 20 2000 367.0 367.0 45.
PAGE 11
PAGE 12
PAGE 13
PAGE 14
PAGE 15
PAGE 16
PAGE 17
PAGE 18
PAGE 19
PAGE 20
MECHANICAL DATA MSSO002E – JANUARY 1995 – REVISED DECEMBER 2001 DB (R-PDSO-G**) PLASTIC SMALL-OUTLINE 28 PINS SHOWN 0,38 0,22 0,65 28 0,15 M 15 0,25 0,09 8,20 7,40 5,60 5,00 Gage Plane 1 14 0,25 A 0°–ā8° 0,95 0,55 Seating Plane 2,00 MAX 0,10 0,05 MIN PINS ** 14 16 20 24 28 30 38 A MAX 6,50 6,50 7,50 8,50 10,50 10,50 12,90 A MIN 5,90 5,90 6,90 7,90 9,90 9,90 12,30 DIM 4040065 /E 12/01 NOTES: A. B. C. D. All linear dimensions are in millimeters.
PAGE 21
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.