Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsLogic ICsLogic IC - Buffer, driver SOIC 20

SN54ALS244C, SN54AS244A, SN74ALS244C, SN74AS244A

OCTAL BUFFERS AND LINE DRIVERS

WITH 3-STATE OUTPUTS

SDAS142C – JULY 1987 – REVISED AUGUST 1995

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

• 3-State Outputs Drive Bus Lines or Buffer

Memory Address Registers

• pnp Inputs Reduce dc Loading

• Package Options Include Plastic

Small-Outline (DW) Packages, Ceramic

Chip Carriers (FK), and Standard Plastic (N)

and Ceramic (J) 300-mil DIPs

description

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. With the ′ALS240A, ′ALS241C,

′AS240A, and ′AS241A, these devices provide the

choice of selected combinations of inverting

outputs, symmetrical active-low output-enable

(OE

) inputs, and complementary OE and OE

inputs.

The -1 version of SN74ALS244C 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 SN54ALS244C.

The SN54ALS244C and SN54AS244A are

characterized for operation over the full military

temperature range of –55°C to 125°C. The

SN74ALS244C and SN74AS244A are

characterized for operation from 0°C to 70°C.

FUNCTION TABLE

(each buffer)

INPUTS

OUTPUT

OE A

L H H

L LL

HXZ

1OE

1A1

2Y4

1A2

2Y3

1A3

2Y2

1A4

2Y1

GND

2OE

1Y1

2A4

1Y2

2A3

1Y3

2A2

1Y4

2A1

SN54ALS244C, SN54AS244A ...J PACKAGE

SN74ALS244C, SN74AS244A . . . DW OR N PACKAGE

(TOP VIEW)

3 2 1 20 19

910111213

1Y1

2A4

1Y2

2A3

1Y3

1A2

2Y3

1A3

2Y2

1A4

SN54ALS244C, SN54AS244A . . . FK PACKAGE

(TOP VIEW)

2Y4

1A1

1OE

1Y4

2A2 2OE

2Y1

GND

2A1

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.

Summary of content (22 pages)

PAGE 1
SN54ALS244C, SN54AS244A, SN74ALS244C, SN74AS244A OCTAL BUFFERS AND LINE DRIVERS WITH 3-STATE OUTPUTS SDAS142C – JULY 1987 – REVISED AUGUST 1995 • • SN54ALS244C, SN54AS244A . . . J PACKAGE SN74ALS244C, SN74AS244A . . .
PAGE 2
SN54ALS244C, SN54AS244A, SN74ALS244C, SN74AS244A OCTAL BUFFERS AND LINE DRIVERS WITH 3-STATE OUTPUTS SDAS142C – JULY 1987 – REVISED AUGUST 1995 logic symbol† 1OE 1A1 1A2 1A3 1A4 1 logic diagram (positive logic) 1OE 2 18 4 16 6 14 8 12 1Y1 1A1 2OE 1Y3 1A2 2A2 2A3 2A4 18 4 16 6 14 8 12 1Y1 1Y2 1Y4 1Y3 EN 1A4 2A1 2 1Y2 1A3 19 1 EN 11 9 13 7 15 5 17 3 1Y4 2Y1 2Y2 2Y3 2OE 19 2Y4 † This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
PAGE 3
SN54ALS244C, SN54AS244A, SN74ALS244C, SN74AS244A OCTAL BUFFERS AND LINE DRIVERS WITH 3-STATE OUTPUTS SDAS142C – JULY 1987 – REVISED AUGUST 1995 recommended operating conditions SN54ALS244C VCC VIH Supply voltage High-level input voltage SN74ALS244C MIN NOM MAX MIN NOM MAX 4.5 5 5.5 4.5 5 5.5 2 2 UNIT V V VIL Low level input voltage Low-level 0.8† 0.
PAGE 4
SN54ALS244C, SN54AS244A, SN74ALS244C, SN74AS244A OCTAL BUFFERS AND LINE DRIVERS WITH 3-STATE OUTPUTS SDAS142C – JULY 1987 – REVISED AUGUST 1995 switching characteristics (see Figure 1) PARAMETER FROM (INPUT) VCC = 4.5 V to 5.
PAGE 5
SN54ALS244C, SN54AS244A, SN74ALS244C, SN74AS244A OCTAL BUFFERS AND LINE DRIVERS WITH 3-STATE OUTPUTS SDAS142C – JULY 1987 – REVISED AUGUST 1995 electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER VIK VOH VCC = 4.5 V, VCC = 4.5 V to 5.5 V, II = – 18 mA IOH = – 2 mA VCC = 4.5 V IOH = – 3 mA IOH = – 12 mA VOL VCC = 4 4.5 5V IOZH IOZL VCC = 5.5 V, VCC = 5.5 V, II IIH VCC = 5.5 V, VCC = 5.
PAGE 6
SN54ALS244C, SN54AS244A, SN74ALS244C, SN74AS244A OCTAL BUFFERS AND LINE DRIVERS WITH 3-STATE OUTPUTS SDAS142C – JULY 1987 – REVISED AUGUST 1995 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.
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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.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com (4) 25-Sep-2013 There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device. (5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation of the previous line and the two combined represent the entire Device Marking for that device.
PAGE 12
PACKAGE MATERIALS INFORMATION www.ti.com 14-Jul-2012 TAPE AND REEL INFORMATION *All dimensions are nominal Device SN74ALS244C-1DWR 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 SOIC DW 20 2000 330.0 24.4 10.8 13.0 2.7 12.0 24.0 Q1 SN74ALS244C-1NSR SO NS 20 2000 330.0 24.4 8.2 13.0 2.5 12.0 24.0 Q1 SN74ALS244CDBR SSOP DB 20 2000 330.0 16.4 8.2 7.5 2.5 12.0 16.
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) SN74ALS244C-1DWR SOIC DW 20 2000 367.0 367.0 45.0 SN74ALS244C-1NSR SO NS 20 2000 367.0 367.0 45.0 SN74ALS244CDBR SSOP DB 20 2000 367.0 367.0 38.0 SN74ALS244CDWR SOIC DW 20 2000 367.0 367.0 45.0 SN74ALS244CNSR SO NS 20 2000 367.0 367.0 45.0 SN74AS244ADWR SOIC DW 20 2000 367.0 367.0 45.
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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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