Datasheet

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SN54AHC244, SN74AHC244

OCTAL BUFFERS/DRIVERS

WITH 3-STATE OUTPUTS

SCLS226J − OCTOBER 1995 − REVISED JULY 2003

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

D Operating Range 2-V to 5.5-V V

D 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 ’AHC244 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 SN74AHC244N SN74AHC244N

SOIC DW

Tube SN74AHC244DW

AHC244

SOIC − DW

Tape and reel SN74AHC244DWR

AHC244

40°Cto85°C

SOP − NS Tape and reel SN74AHC244NSR AHC244

−40°C to 85°C

SSOP − DB Tape and reel SN74AHC244DBR HA244

TSSOP PW

Tube SN74AHC244PW

HA244

TSSOP − PW

Tape and reel SN74AHC244PWR

HA244

TVSOP − DGV Tape and reel SN74AHC244DGVR HA244

CDIP − J Tube SNJ54AHC244J SNJ54AHC244J

−55°C to 125°C

CFP − W Tube SNJ54AHC244W SNJ54AHC244W

55 C

125 C

LCCC − FK Tube SNJ54AHC244FK SNJ54AHC244FK

†

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

SN54AHC244 ...J OR W PACKAGE

SN74AHC244 . . . DB, DGV, DW, N, NS, OR PW PACKAGE

(TOP VIEW)

3 2 1 20 19

910111213

1Y1

2A4

1Y2

2A3

1Y3

1A2

2Y3

1A3

2Y2

1A4

SN54AHC244 . . . 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 (24 pages)

PAGE 1
SN54AHC244, SN74AHC244 OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS SCLS226J − OCTOBER 1995 − REVISED JULY 2003 D Operating Range 2-V to 5.5-V VCC D Latch-Up Performance Exceeds 250 mA Per SN54AHC244 . . . J OR W PACKAGE SN74AHC244 . . .
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SN54AHC244, SN74AHC244 OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS SCLS226J − 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
SN54AHC244, SN74AHC244 OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS SCLS226J − OCTOBER 1995 − REVISED JULY 2003 recommended operating conditions (see Note 3) SN54AHC244 VCC Supply voltage VCC = 2 V VIH MAX 2 5.5 1.5 VCC = 3 V High-level High level input voltage MIN VCC = 5.5 V Input voltage VO Output voltage High-level High level output current IOL Low-level Low level output current Δt/Δv Input transition rise or fall rate TA Operating free-air temperature 5.5 2.1 0.5 0.5 0.9 0.9 1.
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SN54AHC244, SN74AHC244 OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS SCLS226J − OCTOBER 1995 − REVISED JULY 2003 switching characteristics over recommended operating free-air temperature range, VCC = 3.3 V ± 0.
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SN54AHC244, SN74AHC244 OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS SCLS226J − OCTOBER 1995 − REVISED JULY 2003 noise characteristics, VCC = 5 V, CL = 50 pF, TA = 25°C (see Note 4) SN74AHC244 PARAMETER MIN TYP MAX UNIT VOL(P) Quiet output, maximum dynamic VOL 0.5 V VOL(V) Quiet output, minimum dynamic VOL −0.2 V VOH(V) Quiet output, minimum dynamic VOH 4.8 V VIH(D) High-level dynamic input voltage VIL(D) Low-level dynamic input voltage 3.5 V 1.5 V TYP UNIT 8.
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SN54AHC244, SN74AHC244 OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS SCLS226J − OCTOBER 1995 − REVISED JULY 2003 PARAMETER MEASUREMENT INFORMATION VCC From Output Under Test RL = 1 kΩ From Output Under Test Test Point S1 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 VCC 50% VCC Timing Input tw tsu VCC 50% VCC 50% VCC Input 0V th VCC 50% VCC Dat
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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 Orderable Device 18-Oct-2013 Status (1) SNJ54AHC244W ACTIVE Package Type Package Pins Package Drawing Qty CFP W 20 1 Eco Plan Lead/Ball Finish MSL Peak Temp (2) (6) (3) TBD Call TI N / A for Pkg Type Op Temp (°C) Device Marking (4/5) -55 to 125 5962-9678201QS A SNJ54AHC244W (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs.
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PACKAGE OPTION ADDENDUM www.ti.
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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) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant 7.5 2.5 12.0 16.0 Q1 SN74AHC244DBR SSOP DB 20 2000 330.0 16.4 SN74AHC244DGVR TVSOP DGV 20 2000 330.0 12.4 6.9 5.6 1.6 8.0 12.0 Q1 SN74AHC244DWR SOIC DW 20 2000 330.0 24.4 10.8 13.3 2.7 12.0 24.
PAGE 12
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) SN74AHC244DBR SSOP DB 20 2000 367.0 367.0 38.0 SN74AHC244DGVR TVSOP DGV 20 2000 367.0 367.0 35.0 SN74AHC244DWR SOIC DW 20 2000 367.0 367.0 45.0 SN74AHC244NSR SO NS 20 2000 367.0 367.0 45.0 SN74AHC244PWR TSSOP PW 20 2000 364.0 364.0 27.0 SN74AHC244PWR TSSOP PW 20 2000 367.0 367.0 38.
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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.
PAGE 24
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.