74LVCH2245AQ [IDT]

QSOP-20, Tube;


型号：	74LVCH2245AQ
厂家：	INTEGRATED DEVICE TECHNOLOGY
描述：	QSOP-20, Tube PC 光电二极管逻辑集成电路
文件：	总7页 (文件大小：73K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

IDT74LVCH2245A

3.3VCMOSOCTALBUSTRANSCEIVERWITH3-STATEOUTPUTS

INDUSTRIALTEMPERATURERANGE

3.3V CMOS OCTAL BUS

TRANSCEIVER WITH 3-STATE

IDT74LVCH2245A

OUTPUTS, 5 VOLT TOLERANT I/O,

AND BUS-HOLD

FEATURES:

DESCRIPTION:

• 0.5 MICRON CMOS Technology

This bus transceiveris builtusingadvanceddualmetalCMOStechnol-

ogy. The LVCH2245Adevice is designedforasynchronous communica-

tionbetweendata buses.The device transmits data fromthe Abus tothe

B bus or from the B bus to the A bus, depending on the logic level at the

direction-control(DIR)input.Theoutput-enable(OE)inputcanbeusedto

disable the device sothe buses are effectivelyisolated.

• ESD > 2000V per MIL-STD-883, Method 3015; > 200V using

machine model (C = 200pF, R = 0)

• VCC = 3.3V ± 0.3V, Normal Range

• VCC = 2.7V to 3.6V, Extended Range

• CMOS power levels (0.4μ W typ. static)

• Rail-to-rail output swing for increased noise margin

• All inputs, outputs, and I/O are 5V tolerant

• Supports hot insertion

Inputs canbe drivenfromeither3.3Vor5Vdevices.This feature allows

the use of this device as a translator in a mixed 3.3V/5V environment.

The LVCH2245A has series resistors in the output structure of the “B”

port,whichwillsignificantlyreducelinenoisewhenusedwithlightloads. The

driver has been designed to drive ±12mA at the designated threshold

levels. The "A" port has a ±24mA driver.

The LVCH2245A has “bus-hold” which retains the inputs' last state

whenevertheinputgoestoahigh-impedance.Thispreventsfloatinginputs

andeliminates the needforpull-up/downresistors.

• Available in SOIC and QSOP packages

DRIVE FEATURES:

• Balanced Output Drivers: ±12mA (B Port)

• High Output Drivers: ±24mA (A Port)

APPLICATIONS:

• 5V and 3.3V mixed voltage systems

• Data communication and telecommunication systems

FUNCTIONALBLOCKDIAGRAM

DIR

TO SEVEN OTHER CHANNELS

TheIDTlogoisaregisteredtrademarkofIntegratedDeviceTechnology,Inc.

INDUSTRIAL TEMPERATURE RANGE

JANUARY 2004

DSC-4937/4

IDT74LVCH2245A

3.3VCMOSOCTALBUSTRANSCEIVERWITH3-STATEOUTPUTS

INDUSTRIALTEMPERATURERANGE

ABSOLUTEMAXIMUMRATINGS⁽¹⁾

PINCONFIGURATION

Symbol

VTERM

TSTG

Description

Terminal Voltage with Respect to GND

Storage Temperature

Max

Unit

–0.5 to +6.5

–65 to +150

–50 to +50

–50

° C

VCC

DIR

A²

IOUT

DC Output Current

IIK

IOK

Continuous Clamp Current,

VI < 0 or VO < 0

ICC

ISS

Continuous Current through each

VCC or GND

±100

NOTE:

1. Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause

permanent damage to the device. This is a stress rating only and functional operation

of the device at these or any other conditions above those indicated in the operational

sections of this specification is not implied. Exposure to absolute maximum rating

conditions for extended periods may affect reliability.

A⁴

A⁷

CAPACITANCE (TA = +25°C, F = 1.0MHz)

Parameter⁽¹⁾

Conditions

VIN = 0V

VOUT = 0V

VIN = 0V

Typ.

Max. Unit

Symbol

CIN

Input Capacitance

Output Capacitance

I/O Port Capacitance

4.5

GND

COUT

CI/O

5.5

6.5

NOTE:

SOIC/ QSOP

TOP VIEW

1. As applicable to the device type.

PINDESCRIPTION

Pin Names

Description

DIR

Output Enable Input (Active LOW)

Direction Control Output

Side A Inputs or 3-State Outputs⁽¹⁾

Side B Inputs or 3-State Outputs⁽¹⁾

NOTE:

1. These pins have "Bus-Hold". All other pins are standard inputs, outputs, or I/Os.

FUNCTIONTABLE⁽¹⁾

Inputs

DIR

Outputs

B Data to A Bus

A Data to B Bus

Isolation

NOTE:

1. H = HIGH Voltage Level

X = Don’t Care

L = LOW Voltage Level

IDT74LVCH2245A

3.3VCMOSOCTALBUSTRANSCEIVERWITH3-STATEOUTPUTS

INDUSTRIALTEMPERATURERANGE

DCELECTRICALCHARACTERISTICSOVEROPERATINGRANGE

FollowingConditionsApplyUnlessOtherwiseSpecified:

OperatingCondition:TA = –40°C to +85°C

Symbol

Parameter

Test Conditions

Min.

1.7

Typ.⁽¹⁾

—

Max.

—

Unit

VIH

Input HIGH Voltage Level

VCC = 2.3V to 2.7V

VCC = 2.7V to 3.6V

—

VIL

Input LOW Voltage Level

Input Leakage Current

VCC = 2.3V to 2.7V

VCC = 2.7V to 3.6V

—

0.7

0.8

IIH

IIL

VCC = 3.6V

VI = 0 to 5.5V

—

µA

µ A

IOZH

IOZL

High Impedance Output Current

(3-State Output pins)

VCC = 3.6V

VO = 0 to 5.5V

—

IOFF

VIK

Input/Output Power Off Leakage

Clamp Diode Voltage

VCC = 0V, VIN or VO ≤ 5.5V

—

µ A

VCC = 2.3V, IIN = –18mA

–0.7

–1.2

Input Hysteresis

VCC = 3.3V

VCC = 3.6V

—

100

—

µA

ICCL

ICCH

ICCZ

Quiescent Power Supply Current

VIN = GND or VCC

(2)

3.6 ≤ VIN ≤ 5.5V

—

ΔICC

Quiescent Power Supply Current

Variation

One input at VCC - 0.6V, other inputs at VCC or GND

500

µ A

NOTES:

1. Typical values are at VCC = 3.3V, +25°C ambient.

2. This applies in the disabled state only.

BUS-HOLDCHARACTERISTICS

Symbol

IBHH

Parameter⁽¹⁾

Test Conditions

VI = 2V

Min.

–75

Typ.⁽²⁾

—

Max.

—

Unit

Bus-HoldInputSustainCurrent

VCC = 3V

µ A

IBHL

VI = 0.8V

—

IBHH

Bus-HoldInputSustainCurrent

Bus-HoldInputOverdrive Current

VCC = 2.3V

VCC = 3.6V

VI = 1.7V

—

µ A

IBHL

VI = 0.7V

—

IBHHO

VI = 0 to 3.6V

—

±500

IBHLO

NOTES:

1. Pins with Bus-Hold are identified in the pin description.

2. Typical values are at VCC = 3.3V, +25°C ambient.

IDT74LVCH2245A

3.3VCMOSOCTALBUSTRANSCEIVERWITH3-STATEOUTPUTS

INDUSTRIALTEMPERATURERANGE

OUTPUTDRIVECHARACTERISTICS(APORT)

Symbol

Parameter

TestConditions⁽¹⁾

Min.

VCC – 0.2

Max.

—

Unit

VOH

OutputHIGHVoltage

VCC = 2.3V to 3.6V

IOH = – 0.1mA

IOH = – 6mA

IOH = – 12mA

VCC = 2.3V

VCC = 2.7V

VCC = 3V

—

1.7

—

2.2

—

2.4

—

VCC = 3V

IOH = – 24mA

IOL = 0.1mA

IOL = 6mA

—

VOL

OutputLOWVoltage

VCC = 2.3V to 3.6V

VCC = 2.3V

—

0.2

0.4

0.7

0.4

0.55

—

IOL = 12mA

IOL = 24mA

—

VCC = 2.7V

VCC = 3V

—

NOTE:

1. VIH and VIL must be within the min. or max. range shown in the DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE table for the appropriate VCC range.

TA = – 40°C to + 85°C.

OUTPUTDRIVECHARACTERISTICS(BPORT)

Symbol

Parameter

TestConditions⁽¹⁾

Min.

VCC – 0.2

1.9

1.7

2.2

Max.

—

Unit

VOH

OutputHIGHVoltage

VCC = 2.3V to 3.6V

IOH = – 0.1mA

IOH = – 4mA

IOH = – 6mA

IOH = – 4mA

IOH = – 8mA

IOH = – 6mA

IOH = – 12mA

IOL = 0.1mA

IOL = 4mA

VCC = 2.3V

VCC = 2.7V

VCC = 3V

—

2.4

—

VOL

OutputLOWVoltage

VCC = 2.3V to 3.6V

VCC = 2.3V

—

0.2

0.4

0.55

0.4

0.6

0.55

0.8

—

IOL = 6mA

—

VCC = 2.7V

VCC = 3V

IOL = 4mA

—

IOL = 8mA

—

IOL = 6mA

—

IOL = 12mA

—

NOTE:

1. VIH and VIL must be within the min. or max. range shown in the DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE table for the appropriate VCC range.

TA = – 40°C to + 85°C.

IDT74LVCH2245A

3.3VCMOSOCTALBUSTRANSCEIVERWITH3-STATEOUTPUTS

INDUSTRIALTEMPERATURERANGE

OPERATING CHARACTERISTICS, VCC = 3.3V ± 0.3V, TA = 25°C

Symbol

Parameter

Test Conditions

Typical

Unit

CPD

PowerDissipationCapacitanceperTransceiverOutputsenabled

PowerDissipationCapacitanceperTransceiverOutputsdisabled

CL = 0pF, f = 10Mhz

CPD

SWITCHINGCHARACTERISTICS(APORT)⁽¹⁾

VCC = 2.7V

Max.

VCC = 3.3V ± 0.3V

Symbol

Parameter

Min.

Max.

Unit

tPLH

tPHL

PropagationDelay

Bx to Ax

—

7.3

9.5

8.5

—

1.5

6.3

tPZH

tPZL

OutputEnableTime

OE to Ax

—

1.5

1.7

—

8.5

7.5

500

tPHZ

tPLZ

OutputDisableTime

OE to Ax

(2)

tSK(o)

OutputSkew

NOTES:

1. See TEST CIRCUITS AND WAVEFORMS. TA = – 40°C to + 85°C.

2. Skew between any two outputs of the same package and switching in the same direction.

SWITCHINGCHARACTERISTICS(BPORT)⁽¹⁾

VCC = 2.7V

Max.

VCC = 3.3V ± 0.3V

Symbol

tPLH

Parameter

Min.

Max.

Unit

PropagationDelay

Ax to Bx

—

8.1

1.5

7.1

tPHL

tPZH

OutputEnableTime

OE to Bx

—

1.5

1.7

tPZL

tPHZ

OutputDisableTime

9.2

8.2

tPLZ

OE to Bx

(2)

tSK(o)

OutputSkew

—

500

NOTES:

1. See TEST CIRCUITS AND WAVEFORMS. TA = – 40°C to + 85°C.

2. Skew between any two outputs of the same package and switching in the same direction.

IDT74LVCH2245A

3.3VCMOSOCTALBUSTRANSCEIVERWITH3-STATEOUTPUTS

INDUSTRIALTEMPERATURERANGE

TESTCIRCUITSANDWAVEFORMS

TESTCONDITIONS

VIH

SAME PHASE

INPUT TRANSITION

(1)

(2)

tPHL

Symbol VCC =3.3V±0.3V VCC =2.7V VCC =2.5V±0.2V Unit

tPLH

VOH

VOL

OUTPUT

VLOAD

VIH

2 x Vcc

Vcc

2.7

1.5

300

2.7

1.5

300

Vcc / 2

150

VIH

OPPOSITE PHASE

INPUT TRANSITION

VLZ

VHZ

150

LVC Link

Propagation Delay

VLOAD

Open

GND

VCC

DISABLE

ENABLE

VIH

CONTROL

INPUT

500Ω

tPZL

tPLZ

VIN

VOUT

(1, 2)

Pulse

D.U.T.

VLOAD/2

Generator

OUTPUT

NORMALLY

LOW

SWITCH

VLOAD

V^OL+VLZ

VOL

500Ω

tPHZ

tPZH

VOH

VOH-VHZ

OUTPUT

NORMALLY

HIGH

SWITCH

GND

LVC Link

Test Circuit for All Outputs

LVC Link

DEFINITIONS:

CL = Load capacitance: includes jig and probe capacitance.

RT = Termination resistance: should be equal to ZOUT of the Pulse Generator.

Enable and Disable Times

NOTE:

1. Diagram shown for input Control Enable-LOW and input Control Disable-HIGH.

NOTES:

1. Pulse Generator for All Pulses: Rate ≤ 10MHz; tF ≤ 2.5ns; tR ≤ 2.5ns.

2. Pulse Generator for All Pulses: Rate ≤ 10MHz; tF ≤ 2ns; tR ≤ 2ns.

VIH

DATA

INPUT

SWITCHPOSITION

Test

Switch

V^LOAD

GND

Open

t^SU

VIH

TIMING

INPUT

Open Drain

Disable Low

Enable Low

tREM

VIH

ASYNCHRONOUS

CONTROL

Disable High

Enable High

VIH

SYNCHRONOUS

CONTROL

All Other Tests

tSU

VIH

LVC Link

Set-up, Hold, and Release Times

INPUT

tPLH1

t^PHL1

V^OH

VOL

LOW-HIGH-LOW

OUTPUT 1

PULSE

tSK (x)

VOH

VOL

HIGH-LOW-HIGH

PULSE

OUTPUT 2

LVC Link

tPLH2

tPHL2

Pulse Width

tSK(x) = tPLH2 - tPLH1 or tPHL2 - tPHL1

LVC Link

Output Skew - tSK(X)

NOTES:

1. For tSK(o) OUTPUT1 and OUTPUT2 are any two outputs.

2. For tSK(b) OUTPUT1 and OUTPUT2 are in the same bank.

IDT74LVCH2245A

3.3VCMOSOCTALBUSTRANSCEIVERWITH3-STATEOUTPUTS

INDUSTRIALTEMPERATURERANGE

ORDERINGINFORMATION

IDT

LVC

XXXX

Device Type Package

Temp. Range

Bus-Hold

Small Outline IC (gull wing)

Quarter Size Small Outline Package

2245A

Octal Bus Transceiver with 3-State Outputs, 12mA (B port)

24mA (A port)

Bus-hold

–40°C to +85°C

CORPORATE HEADQUARTERS

6024 Silver Creek Valley Road

San Jose, CA 95138

for SALES:

800-345-7015 or 408-284-8200

fax: 408-284-2775

for Tech Support:

logichelp@idt.com

www.idt.com

74LVCH2245AQ [IDT]

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