Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsLogic ICsLogic IC - Buffer, driver PDIP 20

SN54ACT244, SN74ACT244

OCTAL BUFFERS/DRIVERS

WITH 3-STATE OUTPUTS

SCAS517C − JUNE 1995 − REVISED OCTOBER 2002

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

D 4.5-V to 5.5-V V

Operation

D Inputs Accept Voltages to 5.5 V

D Max t

of 9.5 ns at 5 V

D Inputs Are TTL Compatible

SN54ACT244 ...J OR W PACKAGE

SN74ACT244 . . . DB, DW, N, NS, OR PW PACKAGE

(TOP VIEW)

3 2 1 20 19

9 10 11 12 13

1Y1

2A4

1Y2

2A3

1Y3

1A2

2Y3

1A3

2Y2

1A4

SN54ACT244...FK PACKAGE

(TOP VIEW)

2Y4

1A1

1OE

1Y4

2A2 2OE

2Y1

GND

2A1

1OE

1A1

2Y4

1A2

2Y3

1A3

2Y2

1A4

2Y1

GND

2OE

1Y1

2A4

1Y2

2A3

1Y3

2A2

1Y4

2A1

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 ’ACT244 devices are organized as two 4-bit buffers/drivers with separate output-enable (OE

) inputs. When

is low, the device passes noninverted 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 SN74ACT244N SN74ACT244N

SOIC DW

Tube SN74ACT244DW

ACT244

40°Cto85°C

SOIC − DW

Tape and reel SN74ACT244DWR

ACT244

−40°C to 85°C

SOP − NS Tape and reel SN74ACT244NSR ACT244

SSOP − DB Tape and reel SN74ACT244DBR AD244

TSSOP − PW Tape and reel SN74ACT244PWR AD244

CDIP − J Tube SNJ54ACT244J SNJ54ACT244J

−55°C to 125°C

CFP − W Tube SNJ54ACT244W SNJ54ACT244W

LCCC − FK Tube SNJ54ACT24FK SNJ54ACT244FK

†

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.

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
SN54ACT244, SN74ACT244 OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS SCAS517C − JUNE 1995 − REVISED OCTOBER 2002 D 4.5-V to 5.5-V VCC Operation D Inputs Accept Voltages to 5.5 V D Max tpd of 9.5 ns at 5 V D Inputs Are TTL Compatible SN54ACT244 . . . J OR W PACKAGE SN74ACT244 . . .
PAGE 2
SN54ACT244, SN74ACT244 OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS SCAS517C − JUNE 1995 − REVISED OCTOBER 2002 FUNCTION TABLE (each buffer) 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
SN54ACT244, SN74ACT244 OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS SCAS517C − JUNE 1995 − REVISED OCTOBER 2002 recommended operating conditions (see Note 3) SN54ACT244 SN74ACT244 MIN MAX MIN MAX 4.5 5.5 4.5 5.5 UNIT VCC Supply voltage VIH High-level input voltage VIL Low-level input voltage 0.
PAGE 4
SN54ACT244, SN74ACT244 OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS SCAS517C − JUNE 1995 − REVISED OCTOBER 2002 switching characteristics over recommended operating VCC = 5 V ± 0.5 V (unless otherwise noted) (see Figure 1) PARAMETER tPLH tPHL tPZH tPZL tPHZ tPLZ FROM (INPUT) TO (OUTPUT) A Y OE Y OE Y free-air TA = 25°C temperature SN54ACT244 range, SN74ACT244 MIN TYP MAX MIN MAX MIN MAX 2 6.5 9 1 10 1.5 10 2 7 9 1 10 1.5 10 1.5 7 8.5 1 9.5 1 9.5 2 7 9.5 1 11 1.
PAGE 5
PACKAGE OPTION ADDENDUM www.ti.
PAGE 6
PACKAGE OPTION ADDENDUM www.ti.
PAGE 7
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 8
PACKAGE OPTION ADDENDUM www.ti.
PAGE 9
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) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant SN74ACT244DBR SSOP DB 20 2000 330.0 16.4 8.2 7.5 2.5 12.0 16.0 Q1 SN74ACT244DWR SOIC DW 20 2000 330.0 24.4 10.8 13.3 2.7 12.0 24.0 Q1 SN74ACT244NSR 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 5-Jul-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) SN74ACT244DBR SN74ACT244DWR SSOP DB 20 2000 367.0 367.0 38.0 SOIC DW 20 2000 367.0 367.0 45.0 SN74ACT244NSR SO NS 20 2000 367.0 367.0 45.0 SN74ACT244PWR TSSOP PW 20 2000 364.0 364.0 27.
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.