Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsLogic ICsLogic IC - Buffer, driver PDIP 20

SN54AHCT244, SN74AHCT244

OCTAL BUFFERS/DRIVERS

WITH 3-STATE OUTPUTS

SCLS228L – 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 both the performance and

density of 3-state memory-address drivers, clock

drivers, and bus-oriented receivers and

transmitters.

The ’AHCT244 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 SN74AHCT244N SN74AHCT244N

SOIC DW

Tube SN74AHCT244DW

AHCT244

SOIC

–

Tape and reel SN74AHCT244DWR

AHCT244

40°Cto85°C

SOP – NS Tape and reel SN74AHCT244NSR AHCT244

–

40°C

85°C

SSOP – DB Tape and reel SN74AHCT244DBR HB244

TSSOP PW

Tube SN74AHCT244PW

HB244

TSSOP

–

Tape and reel SN74AHCT244PWR

HB244

TVSOP – DGV Tape and reel SN74AHCT244DGVR HB244

CDIP – J Tube SNJ54AHCT244J SNJ54AHCT244J

–55°C to 125°C

CFP – W Tube SNJ54AHCT244W SNJ54AHCT244W

LCCC – FK Tube SNJ54AHCT244FK SNJ54AHCT244FK

†

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

SN54AHCT244 ...J OR W PACKAGE

SN74AHCT244 . . . DB, DGV, DW, N, NS, OR PW PACKAGE

(TOP VIEW)

3212019

910111213

1Y1

2A4

1Y2

2A3

1Y3

1A2

2Y3

1A3

2Y2

1A4

SN54AHCT244 . . . 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 (23 pages)

PAGE 1
SN54AHCT244, SN74AHCT244 OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS SCLS228L – OCTOBER 1995 – REVISED JULY 2003 SN54AHCT244 . . . J OR W PACKAGE SN74AHCT244 . . .
PAGE 2
SN54AHCT244, SN74AHCT244 OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS SCLS228L – OCTOBER 1995 – REVISED JULY 2003 FUNCTION TABLE (each 4-bit buffer/driver) INPUTS OE A OUTPUT Y L H H L L L 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
SN54AHCT244, SN74AHCT244 OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS SCLS228L – OCTOBER 1995 – REVISED JULY 2003 recommended operating conditions (see Note 3) SN54AHCT244 SN74AHCT244 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
SN54AHCT244, SN74AHCT244 OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS SCLS228L – OCTOBER 1995 – REVISED JULY 2003 switching characteristics over recommended operating free-air temperature range, VCC = 5 V ± 0.
PAGE 5
SN54AHCT244, SN74AHCT244 OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS SCLS228L – 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.
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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 18-Oct-2013 (2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been defined.
PAGE 9
PACKAGE OPTION ADDENDUM www.ti.
PAGE 10
PACKAGE MATERIALS INFORMATION www.ti.com 5-Jul-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) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant 7.5 2.5 12.0 16.0 Q1 SN74AHCT244DBR SSOP DB 20 2000 330.0 16.4 SN74AHCT244DGVR TVSOP DGV 20 2000 330.0 12.4 6.9 5.6 1.6 8.0 12.0 Q1 SN74AHCT244DWR SOIC DW 20 2000 330.0 24.4 10.8 13.3 2.7 12.0 24.
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PACKAGE MATERIALS INFORMATION www.ti.com 5-Jul-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) SN74AHCT244DBR SSOP DB 20 2000 367.0 367.0 38.0 SN74AHCT244DGVR TVSOP DGV 20 2000 367.0 367.0 35.0 SN74AHCT244DWR SOIC DW 20 2000 367.0 367.0 45.0 SN74AHCT244NSR SO NS 20 2000 367.0 367.0 45.0 SN74AHCT244PWR TSSOP PW 20 2000 364.0 364.0 27.
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MECHANICAL DATA MPDS006C – FEBRUARY 1996 – REVISED AUGUST 2000 DGV (R-PDSO-G**) PLASTIC SMALL-OUTLINE 24 PINS SHOWN 0,40 0,23 0,13 24 13 0,07 M 0,16 NOM 4,50 4,30 6,60 6,20 Gage Plane 0,25 0°– 8° 1 0,75 0,50 12 A Seating Plane 0,15 0,05 1,20 MAX PINS ** 0,08 14 16 20 24 38 48 56 A MAX 3,70 3,70 5,10 5,10 7,90 9,80 11,40 A MIN 3,50 3,50 4,90 4,90 7,70 9,60 11,20 DIM 4073251/E 08/00 NOTES: A. B. C. D. All linear dimensions are in millimeters.
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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.
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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.