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SN74LVC8T245QPWRQ1;中文规格书,Datasheet资料

SN74LVC8T245-Q1

https://www.wendangku.net/doc/ca3467440.html, SCES815–SEPTEMBER2010

8-BIT DUAL-SUPPLY BUS TRANSCEIVER

WITH CONFIGURABLE VOLTAGE TRANSLATION AND3-STATE OUTPUTS

Check for Samples:SN74LVC8T245-Q1

FEATURES DESCRIPTION

?Qualified for Automotive Applications This8-bit non-inverting bus transceiver uses two

separate configurable power-supply rails.The ?Control Inputs V IH/V IL Levels Are Referenced to

SN74LVC8T245-Q1is optimized to operate with V CCA V CCA Voltage

and V CCB set at 1.65V to 5.5V.The A port is ?V CC Isolation Feature–If Either V CC Input Is at

designed to track V CCA.V CCA accepts any supply GND,All Are in the High-Impedance State voltage from1.65V to5.5V.The B port is designed

?Fully Configurable Dual-Rail Design Allows to track V

CCB .V CCB accepts any supply voltage from

Each Port to Operate Over the Full1.65-V to 1.65V to5.5V.This allows for universal low-voltage

bidirectional translation between any of the 1.8-V,

5.5-V Power-Supply Range

2.5-V,

3.3-V,and5.5-V voltage nodes.

PW PACKAGE

The SN74LVC8T245-Q1is designed for

asynchronous communication between two data

buses.The logic levels of the direction-control(DIR)

input and the output-enable(OE)input activate either

the B-port outputs or the A-port outputs or place both

output ports into the high-impedance mode.The

device transmits data from the A bus to the B bus

when the B-port outputs are activated,and from the B

bus to the A bus when the A-port outputs are

activated.The input circuitry on both A and B ports is

always active and must have a logic HIGH or LOW

level applied to prevent excess I CC and I CCZ.

The SN74LVC8T245-Q1is designed so that the

control pins(DIR and OE)are supplied by V CCA.

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.

The V CC isolation feature ensures that if either V CC

input is at GND,all outputs are in the high-impedance

state.

To ensure the high-impedance state during power up

or power down,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.

ORDERING INFORMATION(1)

T A PACKAGE(2)ORDERABLE PART NUMBER TOP-SIDE MARKING

–40°C to125°C TSSOP–PW Reel of2000SN74LVC8T245QPWRQ1NH245Q

(1)For the most current package and ordering information,see the Package Option Addendum at the end of this document,or see the TI

website at https://www.wendangku.net/doc/ca3467440.html,.

(2)Package drawings,thermal data,and symbolization are available at https://www.wendangku.net/doc/ca3467440.html,//packaging.

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.

PRODUCTION DATA information is current as of publication date.Copyright?2010,Texas Instruments Incorporated Products conform to specifications per the terms of the Texas

Instruments standard warranty.Production processing does not

necessarily include testing of all parameters.

DIR

SN74LVC8T245-Q1

SCES815–SEPTEMBER 2010

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FUNCTION TABLE (1)(EACH 8-BIT SECTION)

CONTROL INPUTS OUTPUT CIRCUITS OPERATION OE DIR A PORT B PORT L L Enabled Hi-Z B data to A bus L H Hi-Z Enabled A data to B bus

H X

Hi-Z

Isolation

(1)

Input circuits of the data I/Os are always active.

LOGIC DIAGRAM (POSITIVE LOGIC)

ABSOLUTE MAXIMUM RATINGS (1)

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

MIN

MAX UNIT V CCA Supply voltage range

–0.5 6.5V

V CCB I/O ports (A port)

–0.5 6.5V I

Input voltage range (2)

I/O ports (B port)–0.5 6.5V

Control inputs –0.5 6.5A port –0.5 6.5Voltage range applied to any output

V O V in the high-impedance or power-off state (2)

B port –0.5

6.5

A port –0.5V CCA +0.5V O Voltage range applied to any output in the high or low state (2)(3)

V B port –0.5V CCB +0.5

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 each V CCA ,V CCB ,and GND

±100

mA q JA Package thermal impedance (4)

PW package

88°C/W T stg Storage temperature range

–65

150

°C

(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 output positive-voltage rating may be exceeded up to 6.5V maximum if the output current rating is observed.(4)

The package thermal impedance is calculated in accordance with JESD 51-7.

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RECOMMENDED OPERATING CONDITIONS(1)(2)(3)(4)

V CCI V CCO MIN MAX UNIT V CCA 1.65 5.5 Supply voltage V

V CCB 1.65 5.5

1.65V to1.95V V CCI×0.65

2.3V to2.7V 1.7

High-level

V IH Data inputs(5)V input voltage3V to3.6V2

4.5V to

5.5V V CCI×0.7

1.65V to1.95V V CCI×0.35

2.3V to2.7V0.7

Low-level

V IL Data inputs(5)V input voltage3V to3.6V0.8

4.5V to

5.5V V CCI×0.3

1.65V to1.95V V CCA×

0.65

High-level Control inputs 2.3V to2.7V 1.7

V IH V input voltage(referenced to V CCA)(6)

3V to3.6V2

4.5V to

5.5V V CCA×0.7

1.65V to1.95V V CCA×

0.35

Low-level Control inputs 2.3V to2.7V0.7

V IL V input voltage(referenced to V CCA)(6)

3V to3.6V0.8

4.5V to

5.5V V CCA×0.3

V I Input voltage Control inputs0 5.5V Active state0V CCO V Input/output

V I/O

voltage3-State0 5.5V

1.65V to1.95V–4

2.3V to2.7V–8

I OH High-level output current mA

3V to3.6V–24

4.5V to

5.5V–32

1.65V to1.95V4

2.3V to2.7V8

I OL Low-level output current mA

3V to3.6V24

4.5V to

5.5V32

1.65V to1.95V20

2.3V to2.7V20

Input transition

Δt/Δv Data inputs ns/V rise or fall rate3V to3.6V10

4.5V to

5.5V5

T A Operating free-air temperature–40125°C

(1)V CCI is the V CC associated with the data input port.

(2)V CCO is the V CC associated with the output port.

(3)All unused or driven(floating)data inputs(I/Os)of the device must be held at logic HIGH or LOW(preferably V CCI or GND)to ensure

proper device operation and minimize power.Refer to the TI application report,Implications of Slow or Floating CMOS Inputs,literature number SCBA004.

(4)All unused control inputs must be held at V CCA or GND to ensure proper device operation and minimize power comsumption.

(5)For V CCI values not specified in the data sheet,V IH min=V CCI×0.7V,V IL max=V CCI×0.3V.

(6)For V CCA values not specified in the data sheet,V IH min=V CCA×0.7V,V IL max=V CCA×0.3V.

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ELECTRICAL CHARACTERISTICS(1)(2)(3)

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

T A=25°C T A=-40°C to

125°C

PARAMETER TEST CONDITIONS V CCA V CCB UNIT

MIN TYP MAX MIN MAX

I OH=–100m A,V I=V IH 1.65V to4.5V 1.65V to4.5V V CCO–0.1

I OH=–4mA,V I=V IH 1.65V 1.65V 1.2

V OH I OH=–8mA,V I=V IH 2.3V 2.3V 1.9V

I OH=–24mA,V I=V IH3V3V 2.4

I OH=–32mA,V I=V IH 4.5V 4.5V 3.8

I OL=100m A,V I=V IL 1.65V to4.5V 1.65V to4.5V0.1

I OL=4mA,V I=V IL 1.65V 1.65V0.45

V OL I OL=8mA,V I=V IL 2.3V 2.3V0.3V

I OL=24mA,V I=V IL3V3V0.55

I OL=32mA,V I=V IL 4.5V 4.5V0.55

I I DIR V I=V CCA or GND 1.65V to5.5V 1.65V to5.5V±1±2m A

0V0to5.5V±2±11

A or B

I off V I or V O=0to5.5V m A

port0to5.5V0V±2±11

A or

B V O=V CCO or GND,

I OZ 1.65V to5.5V 1.65V to5.5V±1±6m A

port OE=V IH

1.65V to5.5V 1.65V to5.5V20

I CCA V I=V CCI or GND,I O=05V0V20m A

0V5V–10

1.65V to5.5V 1.65V to5.5V20

I CCB V I=V CCI or GND,I O=05V0V–10m A

0V5V20

I CCA+I CCB V I=V CCI or GND,I O=0 1.65V to5.5V 1.65V to5.5V40m A

One A port at V CCA–0.6V,

A port50

DIR at V CCA,B port=open

ΔI CCA3V to5.5V3V to5.5V m A DIR at V CCA–0.6V,

DIR B port=open,50

A port at V CCA or GND

One B port at V CCB–0.6V,

ΔI CCB B port3V to5.5V3V to5.5V50m A DIR at GND,A port=open

Control

C i V I=V CCA or GN

D 3.3V 3.3V45pF

inputs

A or B

C io V O=V CCA/B or GN

D 3.3V 3.3V8.510pF

port

(1)V CCO is the V CC associated with the output port.

(2)V CCI is the V CC associated with the input port.

(3)All unused control inputs must be held at V CCA or GND to ensure proper device operation and minimize power comsumption.

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SWITCHING CHARACTERISTICS

over recommended operating free-air temperature range,V CCA=1.8V±0.15V(unless otherwise noted)(see Figure1)

V CCB=1.8V V CCB=2.5V V CCB=3.3V V CCB=5V

FROM TO±0.15V±0.2V±0.3V±0.5V PARAMETER UNIT (INPUT)(OUTPUT)

MIN MAX MIN MAX MIN MAX MIN MAX

t PLH

A B 1.725.9 1.313.2111.40.811.1ns

t PHL

t PLH

B A0.928.80.827.60.727.40.727.4ns

t PHL

t PHZ

OE A 1.533.6 1.533.4 1.533.3 1.433.2ns t PLZ

t PHZ

OE B 2.436.2 1.917.1 1.716 1.314.3ns t PLZ

t PZH

OE A0.4280.427.80.427.70.427.7ns t PZL

t PZH

OE B 1.840 1.520 1.216.60.914.8ns t PZL

SWITCHING CHARACTERISTICS

over recommended operating free-air temperature range,V CCA=2.5V±0.2V(unless otherwise noted)(see Figure1)

V CCB=1.8V V CCB=2.5V V CCB=3.3V V CCB=5V

FROM TO±0.15V±0.2V±0.3V±0.5V PARAMETER UNIT (INPUT)(OUTPUT)

MIN MAX MIN MAX MIN MAX MIN MAX

t PLH

A B 1.525.4 1.2130.810.20.68.8ns

t PHL

t PLH

B A 1.213.3113.1112.90.912.8ns

t PHL

t PHZ

OE A 1.413 1.413 1.413 1.413ns t PLZ

t PHZ

OE B 2.333.6 1.815 1.714.30.910.9ns t PLZ

t PZH

OE A117.2117.3117.2117.3ns t PZL

t PZH

OE B 1.732.2 1.518.1 1.214.1111.2ns t PZL

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SWITCHING CHARACTERISTICS

over recommended operating free-air temperature range,V CCA=3.3V±0.3V(unless otherwise noted)(see Figure1)

V CCB=1.8V V CCB=2.5V V CCB=3.3V V CCB=5V

FROM TO±0.15V±0.2V±0.3V±0.5V PARAMETER UNIT (INPUT)(OUTPUT)

MIN MAX MIN MAX MIN MAX MIN MAX

t PLH

A B 1.525.2 1.112.80.810.30.510.4ns

t PHL

t PLH

B A0.811.20.810.20.710.10.610ns

t PHL

t PHZ

OE A 1.612.2 1.612.2 1.612.2 1.612.2ns t PLZ

t PHZ

OE B 2.133 1.714.3 1.512.60.810.3ns t PLZ

t PZH

OE A0.814.10.813.60.813.20.813.6ns t PZL

t PZH

OE B 1.831.7 1.418.4 1.112.90.910.9ns t PZL

SWITCHING CHARACTERISTICS

over recommended operating free-air temperature range,V CCA=5V±0.5V(unless otherwise noted)(see Figure1)

V CC=1.8V V CC=2.5V V CC=3.3V V CC=5V

FROM TO±0.15V±0.2V±0.3V±0.5V PARAMETER UNIT (INPUT)(OUTPUT)

MIN MAX MIN MAX MIN MAX MIN MAX

t PLH

A B 1.525.4112.80.7100.48.2ns

t PHL

t PLH

B A0.7110.48.80.38.50.38.3ns

t PHL

t PHZ

OE A0.39.40.39.40.39.40.39.4ns t PLZ

t PHZ

OE B232.7 1.613.7 1.4120.79.7ns t PLZ

t PZH

OE A0.710.90.710.90.710.90.710.9ns t PZL

t PZH

OE B 1.531.6 1.318.4113.70.910.7ns t PZL

OPERATING CHARACTERISTICS

T A=25°C

V CCA=V CCA=V CCA=V CCA=

TEST V

CCB =1.8V V CCB=2.5V V CCB=3.3V V CCB=5V

PARAMETER UNIT CONDITIONS

TYP TYP TYP TYP

A-port input,B-port output2223

C pdA(1)C

L =0,

B-port input,A-port output12131316

f=10MHz,pF

A-port input,B-port output13131416

t r=t f=1ns

C pdB(1)

B-port input,A-port output2223

(1)Power dissipation capacitance per transceiver

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V OH V OL

LOAD CIRCUIT × V CCO

Open

Output Control (low-level enabling)

Output Waveform 1S1 at 2 × V CCO (see Note B)Output Waveform 2S1 at GND (see Note B)

0 V

V CCI

0 V

V CCA

V CCO

VOLTAGE WAVEFORMS PROPAGATION DELAY TIMES

VOLTAGE WAVEFORMS PULSE DURATION

VOLTAGE WAVEFORMS ENABLE AND DISABLE TIMES

Input

t pd t PLZ /t PZL t PHZ /t PZH

Open 2 × V CCO 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 v 10 MHz, Z O = 50 ?, dv/dt ≥ 1 V/ns.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.V CCI is the V CC associated with the input port.I.V CCO is the V CC associated with the output port.

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

1.8 V ± 0.15 V

2.5 V ± 0.2 V

3.3 V ± 0.3 V 5 V ± 0.5 V

2 k ?2 k ?2 k ?2 k ?

V CCO R L 0.15 V 0.15 V 0.3 V 0.3 V

V TP C L 15 pF 15 pF 15 pF 15 pF

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PARAMETER MEASUREMENT INFORMATION

Figure 1.Load Circuit and Voltage Waveforms

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PACKAGING INFORMATION

Orderable Device Status (1)Package Type Package

Drawing Pins Package Qty Eco Plan (2)Lead/

Ball Finish

MSL Pea

SN74LVC8T245QPWRQ1ACTIVE TSSOP PW242000Green (RoHS

& no Sb/Br)

CU NIPDAU Level-1-260C

(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 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 http://www.t

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

lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable fo 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, 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 retard 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

provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate inf continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical an TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for releas

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 Cu

OTHER QUALIFIED VERSIONS OF SN74LVC8T245-Q1 :

?Catalog: SN74LVC8T245

?Enhanced Product: SN74LVC8T245-EP

NOTE: Qualified Version Definitions:

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PACKAG Array https://www.wendangku.net/doc/ca3467440.html,

?Catalog - TI's standard catalog product

?Enhanced Product - Supports Defense, Aerospace and Medical Applications

TAPE AND REEL

INFORMATION

*All dimensions

are nominal

Device

Package Type Package Drawing

Pins SPQ

Reel Diameter (mm)Reel Width W1(mm)A0(mm)B0(mm)K0(mm)P1(mm)W (mm)Pin1Quadrant SN74LVC8T245QPWRQ1TSSOP PW

2000

330.0

16.4

6.95

8.3

1.6

8.0

16.0

PACKAGE MATERIALS INFORMATION

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14-Jul-2012

Pack Materials-Page 1

分销商库存信息:

SN74LVC8T245QPWRQ1