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SN74LVC244AZQNR中文资料

https://www.wendangku.net/doc/df16801467.html, FEATURES

DESCRIPTION/ORDERING INFORMATION

1OE

1A1

2Y4

1A2

2Y3

1A3

2Y2

1A4

2Y1

GND

V CC

2OE

1Y1

2A4

1Y2

2A3

1Y3

2A2

1Y4

2A1

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

(TOP VIEW)

RGY PACKAGE

(TOP VIEW)

120

1011

2OE

1Y1

2A4

1Y2

2A3

1Y3

2A2

1Y4

1A1

2Y4

1A2

2Y3

1A3

2Y2

1A4

2Y1

SN74LVC244A

OCTAL BUFFER/DRIVER

WITH3-STATE OUTPUTS SCAS414X–NOVEMBER1992–REVISED MARCH2005

?Operates From1.65V to3.6V

?Inputs Accept Voltages to5.5V

?Specified From–40°C to85°C and–40°C to

125°C

?Max t pd of5.9ns at3.3V

?Typical V OLP(Output Ground Bounce)<0.8V

at V CC=3.3V,T A=25°C

?Typical V OHV(Output V OH Undershoot)>2V

at V CC=3.3V,T A=25°C

?Supports Mixed-Mode Signal Operation on All

Ports(5-V Input/Output Voltage With

3.3-V V CC)

?I off Supports Partial-Power-Down Mode

Operation

?Latch-Up Performance Exceeds250mA Per

JESD17

?ESD Protection Exceeds JESD22

–2000-V Human-Body Model(A114-A)

–200-V Machine Model(A115-A)

–1000-V Charged-Device Model(C101)

This octal buffer/line driver is operational at1.5-V to

3.6-V V CC,but is designed specifically for1.65-V to

3.6-V V CC operation.

ORDERING INFORMATION

T A PACKAGE(1)ORDERABLE PART NUMBER TOP-SIDE MARKING QFN–RGY Reel of1000SN74LVC244ARGYR LC244A

–40°C to85°C VFBGA–GQN SN74LVC244AGQNR

Reel of1000LC244A

VFBGA–ZQN(Pb-Free)SN74LVC244AZQNR

PDIP–N Tube of20SN74LVC244AN SN74LVC244AN

Tube of25SN74LVC244ADW

SOIC–DW LVC244A

Reel of2000SN74LVC244ADWR

SOP–NS Reel of2000SN74LVC244ANSR LVC244A

–40°C to125°C SSOP–DB Reel of2000SN74LVC244ADBR LC244A

Tube of70SN74LVC244APW

TSSOP–PW Reel of2000SN74LVC244APWR LC244A

Reel of250SN74LVC244APWT

TVSOP–DGV Reel of2000SN74LVC244ADGVR LC244A

(1)Package drawings,standard packing quantities,thermal data,symbolization,and PCB design guidelines are available at

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DESCRIPTION/ORDERING INFORMATION (CONTINUED)

GQN OR ZQN PACKAGE

(TOP VIEW)

A B C D E

SN74LVC244A

OCTAL BUFFER/DRIVER WITH 3-STATE OUTPUTS

SCAS414X–NOVEMBER 1992–REVISED MARCH 2005

The SN74LVC244A is organized as two 4-bit 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.

Inputs can be driven from either 3.3-V or 5-V devices.This feature allows the use of this device as a translator in a mixed 3.3-V/5-V system environment.

To ensure the high-impedance state during power up or power down,OE should be tied to V CC through a pullup resistor;the minimum value of the resistor is determined by the current-sinking capability of the driver.

This device is fully specified for partial-power-down applications using I off .The I off circuitry disables the outputs,preventing damaging current backflow through the device when it is powered down.

TERMINAL ASSIGNMENTS

234A 1A11OE V CC 2OE B 1A22A42Y41Y1C 1A32Y32A31Y2D 1A42A22Y21Y3E

GND

2Y1

2A1

1Y4

FUNCTION TABLE (EACH BUFFER)

INPUTS OUTPUT

OE A L H H L L L H

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1Y11OE

1A1

1Y21A2

1Y31A3

1Y41A4

2Y1

2OE

2A1

2Y2

2A2

2Y3

2A3

2Y4

2A4

Pin numbers shown are for the DB, DGV, DW, N, NS, PW, and RGY packages.

Absolute Maximum Ratings (1)

SN74LVC244A

OCTAL BUFFER/DRIVER WITH 3-STATE OUTPUTS

SCAS414X–NOVEMBER 1992–REVISED MARCH 2005

LOGIC DIAGRAM (POSITIVE LOGIC)

over operating free-air temperature range (unless otherwise noted)

MIN

MAX UNIT V CC Supply voltage range –0.5 6.5V V I Input voltage range (2)

–0.5 6.5V V O Voltage range applied to any output in the high-impedance or power-off state (2)–0.5 6.5V V O Voltage range applied to any output in the high or low state (2)(3)–0.5

V CC +0.5

V I IK Input clamp current V I <0–50mA I OK Output clamp current V O <0

–50mA I O

Continuous output current

±50mA Continuous current through V CC or GND

±100mA

DB package (4)70DGV package (4)92DW package (4)

58GQN/ZQN package (4)78θJA

Package thermal impedance

°C/W N package (4)69NS package (4)60PW package (4)83RGY package (5)

37T stg Storage temperature range –65

150°C P tot Power dissipation

T A =–40°C to 125°C (6)(7)

500

mW (1)Stresses beyond those listed under "absolute maximum ratings"may cause permanent damage to the device.These are stress ratings only,and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions"is not implied.Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.(2)The input and output negative-voltage ratings may be exceeded if the input and output current ratings are observed.(3)The value of V CC is provided in the recommended operating conditions table.(4)The package thermal impedance is calculated in accordance with JESD 51-7.(5)The package thermal impedance is calculated in accordance with JESD 51-5.(6)For the DW package:above 70°C the value of P tot derates linearly with 8mW/K.

(7)

For the DB,DGV,N,NS,and PW packages:above 60°C the value of P tot derates linearly with 5.5mW/K.

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Recommended Operating Conditions (1)

SN74LVC244A

OCTAL BUFFER/DRIVER WITH 3-STATE OUTPUTS

SCAS414X–NOVEMBER 1992–REVISED MARCH 2005

T A =25°C –40TO 85°C –40TO 125°C UNIT MIN

MAX MIN MAX MIN MAX Operating

1.65 3.6

V CC Supply voltage

Data retention only 1.5

1.5

V CC =1.65V to 1.95V 0.65×V CC

0.65×V CC

High-level V IH

V CC =2.3V to 2.7V 1.7 1.7 1.7V

input voltage

V CC =2.7V to 3.6V

V CC =1.65V to 1.95V 0.35×V CC

0.35×V CC

Low-level V IL V CC =2.3V to 2.7V 0.70.70.7V input voltage V CC =2.7V to 3.6V

0.80.80.8V I Input voltage 0 5.50 5.50 5.5V V O

Output voltage

0V CC 0

V CC 0

V CC V V CC =1.65V

–4–4–4V CC =2.3V –8–8–8High-level I OH

mA output current

V CC =2.7V –12–12–12V CC =3V –24–24–24V CC =1.65V

444V CC =2.3V 888Low-level I OL

mA output current

V CC =2.7V 121212V CC =3V

(1)

All unused inputs of the device must be held at V CC or GND to ensure proper device operation.Refer to the TI application report,Implications of Slow or Floating CMOS Inputs ,literature number SCBA004.

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Electrical Characteristics Switching Characteristics

SN74LVC244A

OCTAL BUFFER/DRIVER

WITH3-STATE OUTPUTS SCAS414X–NOVEMBER1992–REVISED MARCH2005

over recommended operating free-air temperature range(unless otherwise noted)

T A=25°C–40TO85°C–40TO125°C PARAMETER TEST CONDITIONS V CC UNIT

MIN TYP MAX MIN MAX MIN MAX

V CC–V CC–V CC–

I OH=–100μA 1.65V to3.6V

0.20.20.3

I OH=–4mA 1.65V 1.29 1.2 1.05

I OH=–8mA 2.3V 1.9 1.7 1.55

V OH V

2.7V 2.2 2.2 2.05

I OH=–12mA

3V 2.4 2.4 2.25

I OH=–24mA3V 2.3 2.22

I OL=100μA 1.65V to3.6V0.10.20.3

I OL=4mA 1.65V0.240.450.6

V OL I OL=8mA 2.3V0.30.70.75V

I OL=12mA 2.7V0.40.40.6

I OL=24mA3V0.550.550.8

I I V I=5.5V or GND 3.6V±1±5±20μA

I off V I or V O=5.5V0±1±10±20μA

I OZ V O=0to5.5V 3.6V±1±10±20μA

V I=V CC or GND11040

I CC I O=0 3.6VμA

3.6V≤V I≤5.5V(1)11040

One input at V CC–0.6V,

?I CC 2.7V to3.6V5005005000μA Other inputs at V CC or GND

C i V I=V CC or GN

D 3.3V4pF

C o V O=V CC or GN

D 3.3V 5.5pF

(1)This applies in the disabled state only.

over recommended operating free-air temperature range(unless otherwise noted)(see Figure1)

T A=25°C–40TO85°C–40TO125°C FROM TO

PARAMETER V CC UNIT (INPUT)(OUTPUT)MIN TYP MAX MIN MAX MIN MAX

1.5V1714.4114.9116.4

1.8V±0.15V1 5.910.4110.911

2.4

t pd A Y 2.5V±0.2V1 4.27.417.9110ns

2.7V1 4.2 6.71 6.918.2

3.3V±0.3V 1.5 3.9 5.7 1.5 5.9 1.57.2

1.5V18.317.8118.3119.8

1.8V±0.15V1 6.41

2.1112.6114.1

t en OE Y 2.5V±0.2V1 4.69.119.6111.7ns

2.7V158.418.6110.3

3.3V±0.3V 1.5

4.57.4 1.57.6 1.59.4

1.5V17.215.6116.1117.6

1.8V±0.15V1 5.811.611

2.111

3.6

t dis OE Y 2.5V±0.2V1 3.77.317.819.9ns

2.7V1

3.8 6.61 6.818.6

3.3V±0.3V 1.5 3.8 6.3 1.5 6.5 1.58

t sk(o) 3.3V±0.3V1 1.5ns

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Operating Characteristics

SN74LVC244A

OCTAL BUFFER/DRIVER WITH 3-STATE OUTPUTS

SCAS414X–NOVEMBER 1992–REVISED MARCH 2005

T A =25°C

PARAMETER

TEST CONDITIONS

V CC TYP UNIT

1.8V 43Outputs enabled

f =10MHz

2.5V 43

3.3V 44C pd

Power dissipation capacitance per buffer/driver

pF 1.8V 1Outputs disabled

f =10MHz 2.5V 13.3V

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PARAMETER MEASUREMENT INFORMATION

From Output Under Test

LOAD CIRCUIT

Open Data Input

Timing Input

V I

0 V

V I

0 V

Input

VOLTAGE WAVEFORMS SETUP AND HOLD TIMES

VOLTAGE WAVEFORMS PROPAGATION DELAY TIMES

INVERTING AND NONINVERTING OUTPUTS

VOLTAGE WAVEFORMS PULSE DURATION

V OH

V OL

V I

0 V Input

Output Waveform 1S1 at V LOAD (see Note B)

Output Waveform 2S1 at GND (see Note B)

V OL

V OH V LOAD /2

0 V

≈0 V

V I

VOLTAGE WAVEFORMS ENABLE AND DISABLE TIMES LOW- AND HIGH-LEVEL ENABLING

Output

t PLH /t PHL t PLZ /t PZL t PHZ /t PZH

Open V LOAD GND

TEST S1NOTES: A.C L includes probe and jig capacitance.

B.Waveform 1 is for an output with internal conditions such that the output is low, except when disabled by the output control.

Waveform 2 is for an output with internal conditions such that the output is high, except when disabled by the output control.C.All input pulses are supplied by generators having the following characteristics: PRR ≤ 10 MHz, Z O = 50 ?.D.The outputs are measured one at a time, with one transition per measurement.E.t PLZ and t PHZ are the same as t dis .F.t PZL and t PZH are the same as t en .G.t PLH and t PHL are the same as t pd .

H.All parameters and waveforms are not applicable to all devices.

Output Control V I

1.5 V 1.8 V ± 0.15 V

2.5 V ± 0.2 V

2.7 V

3.3 V ± 0.3 V

2 k ?1 k ?500 ?500 ?500 ?

V CC R L 2 × V CC 2 × V CC 2 × V CC 6 V 6 V

V LOAD C L 15 pF 30 pF 30 pF 50 pF 50 pF

0.1 V 0.15 V 0.15 V 0.3 V 0.3 V

V ?V CC V CC V CC 2.7 V 2.7 V

V I V CC /2V CC /2V CC /21.5 V 1.5 V

V M t r /t f ≤2 ns ≤2 ns ≤2 ns ≤2.5 ns ≤2.5 ns

INPUTS SN74LVC244A

OCTAL BUFFER/DRIVER WITH 3-STATE OUTPUTS

SCAS414X–NOVEMBER 1992–REVISED MARCH 2005

Figure 1.Load Circuit and Voltage Waveforms

PACKAGING INFORMATION

Orderable

Device Status (1)Package Type Package Drawing Pins Package Qty Eco Plan (2)

Lead/Ball Finish

MSL Peak Temp (3)SN74LVC244ADBLE OBSOLETE SSOP DB 20TBD

Call TI Call TI

SN74LVC244ADBR ACTIVE SSOP DB 202000Green (RoHS &

no Sb/Br)CU NIPDAU Level-1-260C-UNLIM SN74LVC244ADBRE4ACTIVE SSOP DB 202000Green (RoHS &

no Sb/Br)CU NIPDAU Level-1-260C-UNLIM SN74LVC244ADBRG4ACTIVE SSOP DB 202000Green (RoHS &

no Sb/Br)CU NIPDAU Level-1-260C-UNLIM SN74LVC244ADGVR ACTIVE TVSOP DGV 202000Green (RoHS &

no Sb/Br)CU NIPDAU Level-1-260C-UNLIM SN74LVC244ADGVRE4ACTIVE TVSOP DGV 202000Green (RoHS &

no Sb/Br)CU NIPDAU Level-1-260C-UNLIM SN74LVC244ADW ACTIVE SOIC DW 2025Green (RoHS &no Sb/Br)CU NIPDAU Level-1-260C-UNLIM SN74LVC244ADWE4ACTIVE SOIC DW 2025

Green (RoHS &no Sb/Br)

CU NIPDAU Level-1-260C-UNLIM SN74LVC244ADWR ACTIVE SOIC DW 202000Green (RoHS &

no Sb/Br)CU NIPDAU Level-1-260C-UNLIM SN74LVC244ADWRE4ACTIVE SOIC DW 202000Green (RoHS &

no Sb/Br)CU NIPDAU Level-1-260C-UNLIM SN74LVC244AGQNR

ACTIVE

BGA MI CROSTA R JUNI OR GQN

1000

TBD

SNPB

Level-1-240C-UNLIM

SN74LVC244AN ACTIVE PDIP N 2020Pb-Free (RoHS)CU NIPDAU N /A for Pkg Type SN74LVC244ANE4ACTIVE PDIP N 2020

Pb-Free (RoHS)

CU NIPDAU N /A for Pkg Type SN74LVC244ANSR ACTIVE SO NS 202000Green (RoHS &

no Sb/Br)CU NIPDAU Level-1-260C-UNLIM SN74LVC244ANSRE4ACTIVE SO NS 202000Green (RoHS &

no Sb/Br)CU NIPDAU Level-1-260C-UNLIM SN74LVC244APW ACTIVE TSSOP PW 2070Green (RoHS &no Sb/Br)CU NIPDAU Level-1-260C-UNLIM SN74LVC244APWE4ACTIVE TSSOP PW 2070Green (RoHS &no Sb/Br)CU NIPDAU Level-1-260C-UNLIM SN74LVC244APWG4ACTIVE TSSOP PW 2070

Green (RoHS &no Sb/Br)

CU NIPDAU Level-1-260C-UNLIM SN74LVC244APWLE OBSOLETE TSSOP PW 20TBD

Call TI Call TI

SN74LVC244APWR ACTIVE TSSOP PW 202000Green (RoHS &

no Sb/Br)CU NIPDAU Level-1-260C-UNLIM SN74LVC244APWRE4ACTIVE TSSOP PW 202000Green (RoHS &

no Sb/Br)CU NIPDAU Level-1-260C-UNLIM SN74LVC244APWRG4ACTIVE TSSOP PW 202000Green (RoHS &

no Sb/Br)CU NIPDAU Level-1-260C-UNLIM SN74LVC244APWT ACTIVE TSSOP PW 20250Green (RoHS &no Sb/Br)CU NIPDAU Level-1-260C-UNLIM SN74LVC244APWTE4ACTIVE TSSOP PW 20250

Green (RoHS &no Sb/Br)

CU NIPDAU Level-1-260C-UNLIM SN74LVC244ARGYR

ACTIVE

QFN

RGY

1000Green (RoHS &

no Sb/Br)

CU NIPDAU

Level-2-260C-1YEAR

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6-Dec-2006

Orderable Device Status (1)Package Type Package Drawing Pins Package Qty Eco Plan (2)

Lead/Ball Finish MSL Peak Temp (3)SN74LVC244ARGYRG4ACTIVE QFN RGY 201000Green (RoHS &

no Sb/Br)CU NIPDAU Level-2-260C-1YEAR SN74LVC244AZQNR

ACTIVE

BGA MI CROSTA R JUNI OR

ZQN

1000Green (RoHS &

no Sb/Br)

SNAGCU

Level-1-260C-UNLIM

(1)

The marketing status values are defined as follows:ACTIVE:Product device recommended for new designs.

LIFEBUY:TI has announced that the device will be discontinued,and a lifetime-buy period is in effect.

NRND:Not recommended for new designs.Device is in production to support existing customers,but TI does not recommend using this part in a new design.

PREVIEW:Device has been announced but is not in production.Samples may or may not be available.OBSOLETE:TI has discontinued the production of the device.

(2)

Eco Plan -The planned eco-friendly classification:Pb-Free (RoHS),Pb-Free (RoHS Exempt),or Green (RoHS &no Sb/Br)-please check https://www.wendangku.net/doc/df16801467.html,/productcontent for the latest availability information and additional product content details.TBD:The Pb-Free/Green conversion plan has not been defined.

Pb-Free (RoHS):TI's terms "Lead-Free"or "Pb-Free"mean semiconductor products that are compatible with the current RoHS requirements for all 6substances,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.

Pb-Free (RoHS Exempt):This component has a RoHS exemption for either 1)lead-based flip-chip solder bumps used between the die and package,or 2)lead-based die adhesive used between the die and leadframe.The component is otherwise considered Pb-Free (RoHS compatible)as defined above.

Green (RoHS &no Sb/Br):TI defines "Green"to mean Pb-Free (RoHS compatible),and free of Bromine (Br)and Antimony (Sb)based flame retardants (Br or Sb do not exceed 0.1%by weight in homogeneous material)

(3)

MSL,Peak Temp.--The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications,and peak solder temperature.

Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided.TI bases its knowledge and belief on information provided by third parties,and makes no representation or warranty as to the accuracy of such information.Efforts are underway to better integrate information from third parties.TI has taken and continues to take reasonable steps to provide

representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals.TI and TI suppliers consider certain information to be proprietary,and thus CAS numbers and other limited information may not be available for release.

In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s)at issue in this document sold by TI to Customer on an annual basis.

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