PI74LPT16L245AVX [PERICOM]

Bus Transceiver, LPT Series, 2-Func, 8-Bit, True Output, CMOS, PDSO48, 0.300 INCH, PLASTIC, SSOP-48;


型号：	PI74LPT16L245AVX
厂家：	PERICOM SEMICONDUCTOR CORPORATION
描述：	Bus Transceiver, LPT Series, 2-Func, 8-Bit, True Output, CMOS, PDSO48, 0.300 INCH, PLASTIC, SSOP-48 光电二极管逻辑集成电路
文件：	总6页 (文件大小：80K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

PI74LPT16L245

Fast CMOS 3.3V 16-Bit

Bidirectional Transceiver

Product Features

Product Description

•

CompatiblewithLCX™andLVT™familiesofproducts

Pericom Semiconductor’s PI74LPT series of logic circuits are pro-

ducedusingtheCompany’sadvanced0.6micronCMOStechnology,

achieving industry leading speed grades.

•

Supports 5V Tolerant Mixed Signal Mode Operation

– Input can be 3V or 5V

– Output can be 3V or connected to 5V bus

ThePI74LPT16L245isalownoise16-bitbidirectionaltransceiver

designed for asynchronous two-way communication between data

buses.Thedirectioncontrolinputpin(xDIR)determinesthedirection

ofdataflowthroughthebidirectionaltransceiver. TheDirectionand

Output Enable controls are designed to operate this device as either

two independent 8-bit transceivers or one 16-bit transceiver. The

output enable (OE) input, when HIGH, disables both A and B ports

by placing them in HIGH Z condition.

•

Advanced Low Power CMOS Operation

Excellent output drive capability:

Balanced drives (6 mA sink and source)

•

Pin compatible with industry standard double-density

pinouts

•

Low Noise, overshoot/undershoot, ±1V Max.

Low ground bounce outputs

ThePI74LPT16L245canbedrivenfromeither3.3Vor5.0Vdevices

allowing this device to be used as a translator in a mixed

3.3/5.0V system.

Hysteresis on all inputs

Industrial operating temperature range: –40°C to +85°C

Multiple center pins and distributed Vcc/GND pins minimize

switching noise

•

Packagesavailable:

–48-pin240milwidethinplasticTSSOP(A)

–48-pin300milwideplasticSSOP(V)

Logic Block Diagram

1DIR

2DIR

1OE

2OE

1A0

1A1

1A2

1A3

1A4

1A5

1A6

1A7

2A0

2B0

2A1

2B1

2A2

2B2

2A3

2B3

2A4

2B4

2A5

2B5

2A6

2B6

2A7

2B7

1B0

1B1

1B2

1B3

1B4

1B5

1B6

1B7

PS8607

03/12/02

PI74LPT16L245

3.3V16-BitBiDirectionalTransceiver

Product Pin Description

Truth Table

Inputs⁽¹⁾

Pin Name

xOE

Description

XOE

xDIR

Outputs⁽¹⁾

Bus B Data to Bus A

Bus A Data to Bus B

3-State Output Enable Inputs (Active LOW)

Direction Control Input

Side A Inputs or 3-State Inputs

Side B Outputs or 3-State Outputs

Ground

xDIR

xAx

xBx

GND

VCC

Note:

1. H = High Voltage Level, X = Don't Care,

L = Low Voltage Level, Z = High Impedance

Power

Product Pin Configuration

DIR

GND

45 GND

GND 10

39 GND

48-Pin

V48

A48

GND 15

34 GND

GND 21

28 GND

DIR 24

Capacitance (TA = 25°C, f = 1 MHz)

Parameters⁽¹⁾

Description

Test Conditions

Typ

Max.

Units

CIN

Input Capacitance

Output Capacitance

VIN = 0 V

4.5

5.5

C^OUT

VOUT = 0 V

Note:

1. This parameter is determined by device characterization but is not production tested.

PS8607

03/12/02

PI74LPT16L245

3.3V16-BitBiDirectionalTransceiver

Maximum Ratings

(Above which the useful life may be impaired. For user guidelines, not tested.)

Storage Temperature............................................................. –55°C to +125°C

Ambient Temperature with Power Applied............................ –40°C to +85°C

Supply Voltage to Ground Potential (Inputs & Vcc Only)......–0.5V to +7.0V

Supply Voltage to Ground Potential (Outputs & D/O Only) ..–0.5V to +7.0V

DC Input Voltage ....................................................................–0.5V to +7.0V

DC Output Current .............................................................................. 120 mA

Power Dissipation .................................................................................... 1.0W

Note:

Stresses greater than those listed under MAXIMUM

RATINGS may cause permanent damage to the de-

vice. This is a stress rating only and functional opera-

tion 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.

DC Electrical Characteristics (Over the Operating Range, TA = –40°C to +85°C, VCC = 2.7V to 3.6V)

Parameters

Description

TestConditions⁽¹⁾

Min.

Typ⁽²⁾

Max.

Units

VIH

Input HIGH Voltage (Input pins)

InputHIGHVoltage(I/Opins)

Input LOW Voltage

GuaranteedLogicHIGHLevel

2.2

2.0

–0.5

—

5.5

0.8

V^IL

IIH

IIL

GuaranteedLogicLOWLevel

(Input and I/O pins)

Input HIGH Current (Input pins)

InputHIGHCurrent(I/Opins)

Input LOW Current (Input pins)

Input LOW Current (I/O pins)

High Impedance Output Current

(3-State Output pins)

ClampDiodeVoltage

OutputHIGHCurrent

Output LOW Current

OutputHIGHVoltage

VCC=Max.

VIN=5.5V

—

–15

—

±1

µA

VCC=Max.

VIN =VCC

VCC=Max.

VCC =Max.

VIN =GND

VOUT =5.5V

VOUT =GND

IOZH

IOZL

VIK

IODH

IODL

VOH

—

±1

VCC =Min., IIN =–18 mA

VCC =3.3V,VIN =VIH orVIL,VO =1.5V⁽³⁾

–0.7

–28

–1.2

–60

VCC = Min. ,VIN = VIH or VIL IOH = –0.1 mA Vcc-0.2

VCC =3.0V,

VIN =VIH orVIL

VCC =Min.

VIN =VIH orVIL

IOH = –6 mA

IOH = –12 mA

IOL = 0.1 mA

IOL = 6 mA

2.4⁽⁵⁾

2.0

—

–30

—

2.6

—

0.3

–56

—

0.2

VOL

Output LOW Voltage

µA

0.5

IOS

IOFF

V^H

Short Circuit Current⁽⁴⁾

PowerDownDisable

Input Hysteresis

VCC =Max.⁽³⁾,VOUT =GND

VCC =0V,VIN orVOUT ≤4.5V

–120

±100

—

150

Notes:

1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device type.

2. Typical values are at Vcc = 3.3V, +25°C ambient and maximum loading.

3. Not more than one output should be shorted at one time. Duration of the test should not exceed one second.

4. This parameter is guaranteed but not tested.

5. V^OH= VCC – 0.6V at rated current.

PS8607

03/12/02

PI74LPT16L245

3.3V16-BitBiDirectionalTransceiver

Power Supply Characteristics

Parameters Description

Test Conditions⁽¹⁾

VCC = Max.

Min. Typ⁽²⁾Max. Units

ICC

Quiescent Power Supply Current

VIN = GND or VCC

VIN = VCC – 0.6V⁽³⁾

0.1

2.0

µA

∆I^CC

Quiescent Power Supply Current

TTL Inputs HIGH

VCC = Max.

I^CCD

Dynamic Power Supply⁽⁴⁾

VCC = Max.,

VIN = VCC

µA/

Outputs Open

VIN = GND

MHz

XOE = xDIR = GND

One Bit Toggling

50% Duty Cycle

Total Power Supply

Current⁽⁶⁾

VCC = Max.,

Outputs Open

fI = 10 MHZ

VIN = VCC – 0.6V

VIN = GND

0.5

0.8

50% Duty Cycle

XOE = xDIR = GND

One Bit Toggling

VCC = Max.,

Outputs Open

VIN = VCC – 0.6V

VIN = GND

2.0

3.3⁽⁵⁾

fI = 2.5 MHZ

50% Duty Cycle

XOE = xDIR = GND

16 Bits Toggling

Notes:

1. For Max. or Min. condition, use appropriate value specified under Electrical Characteristics for the applicable device.

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

3. Per TTL driven input; all other inputs at Vcc or GND.

4. This parameter is not directly testable, but is derived for use in Total Power Supply Calculations.

5. Values for these conditions are examples of the Icc formula. These limits are guaranteed but not tested.

6. I^C=IQUIESCENT + IINPUTS + IDYNAMIC

IC = ICC + ∆ICC DHNT + ICCD (fCP/2 + fINI)

ICC = Quiescent Current (ICCL, ICCH and ICCZ)

∆ICC = Power Supply Current for a TTL High Input

DH = Duty Cycle for TTL Inputs High

NT = Number of TTL Inputs at DH

ICCD = Dynamic Current Caused by an Input Transition Pair (HLH or LHL)

fCP = Clock Frequency for Register Devices (Zero for Non-Register Devices)

NCP = Number of Clock Inputs at fCP

fI = Input Frequency

NI = Number of Inputs at fI

All currents are in milliamps and all frequencies are in megahertz.

PS8607

03/12/02

PI74LPT16L245

3.3V16-BitBiDirectionalTransceiver

Switching Characteristics over Operating Range⁽¹⁾

LPT16L245

Com.

Min.⁽³⁾

LPT16L245A

Com.

LPT16L245C

Com.

Parameters Description

t^PLHPropagation Delay

t^PHL

t^PZH

t^PZL

t^PHZ

t^PLZ

Conditions⁽²⁾

Max.

Min.⁽³⁾

Max.

Min.⁽³⁾

Max.

Units

CL = 50 pF

RL =500Ω

1.5

5.2

1.5

4.6

1.5

5.5⁽⁶⁾

A to B, B to A

OutputEnableTime

xOE to A or B

Output Disable Time⁽⁴⁾

xOE to A or B

7.2

0.5

1.5

6.2

5.0

6.2

5.0

0.5

1.5

5.8

4.8

5.8

4.8

0.5

t^PZH

tPZL

OutputEnableTime

xDIR to A or B

tPHZ

tPLZ

OutputDisableTime

xDIR to A or B⁽⁴⁾

tSK(o)

Output Skew⁽⁵⁾

Notes:

1. Propagation Delays and Enable/Disable times are with Vcc = 3.3V ±0.3V, normal range. For Vcc = 2.7V, extended range, all

Propagation Delays and Enable/Disable times should be degraded by 20%.

2. See test circuit and wave forms.

3. Minimum limits are guaranteed but not tested on Propagation Delays.

4. This parameter is guaranteed but not production tested.

5. Skew between any two outputs, of the same package, switching in the same direction. This parameter is guaranteed by design.

6. All bits switching with 80pF C .

Noise Characteristics

Parameters

Description

Overshoot

Conditions

LPT16L245

+1V Max.

1V Max.

Units

C = 20pF

Undershoot

PS8607

03/12/02

PI74LPT16L245

3.3V16-BitBiDirectionalTransceiver

PackagingMechanical:48-pinTSSOP (A)

.236

.244

6.0

6.2

.488 12.4

.496 12.6

.047

SEATING PLANE

1.20 Max

0.09

0.20

.004

.008

0.45 .018

0.75 .030

.002

.006

0.05

0.15

.007

.010

.0197

BSC

.319

BSC

X.XX

DENOTES DIMENSIONS

IN MILLIMETERS

0.50

0.17

0.27

8.1

PackagingMechanical:48-pinSSOP (V)

.395

.420

10.03

10.67

.291

.299

7.39

7.59

Gauge Plane

.010

0.25

.02

.04

0.51

1.01

.620

.630

15.75

16.00

0.381

0.635

.015

.025

x 45˚

.008

0.20

Nom.

.110 2.79 Max

.008 0.20

.0135 0.34

.025 BSC

0.635

.008 0.20

.016 0.40

0-8˚

X.XX

DENOTES DIMENSIONS

IN MILLIMETERS

Pericom Semiconductor Corporation

2380 Bering Drive • San Jose, CA 95131 • 1-800-435-2336 • Fax (408) 435-1100 • http://www.pericom.com

PS8607

03/12/02

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