your complete choice for i2c-bus peripherals · 12/13/2007 · pca9532 16-bit led dimmer pca9533...

Our invention, your solution to everyday design challenges

Your complete choice for I2C-bus peripherals

2 I2C-bus logic selection guide

Broad-based solutions from the inventor of the technology

NXPSemiconductorsistheworld’sleadingsupplierofI2C-busproducts.Weinventedthetechnologymorethan20yearsagoandneverlookedback.Sincethen,we’vetakenperformancetonewlevels,introducedawidevarietyofvitalfunctions,andcontinuetoofferthemostflexibleoptionsforthemostimportantapplications.

Weoffertheindustry’sbroadestportfolioofI2C-buslogic,providingessentialcomponentslikeGPIO,LEDblinkers/dimmers,HotSwapbusbuffers,busexpanders,bushubs/repeaters,DIPswitches,muxesandswitches,EEPROMs,dataconverters,LCDsegmentdrives,andmore.

Tomeettheneedsoftoday’shigh-performancesystems,ourFast-modePlus(Fm+)devicesoperateatupto1MHzanddriveupto30mA,sotheyworkwithlongbusesandsupportapplicationsofupto1,500pF.TheyalsousetheFast-modesoftwareprotocol(400kHz),soyoucanupgradespeedwithouthavingtochangeyourdesignsoftware.

Toovercomethelimitsofinterfacingahostbustoitsperipheral,we’veintroducedanewseriesofbridgeICsthatmanagetheconnectionbetweentheI2C-busandotherprotocols.ThebridgesmakeitpossibleforlegacyI2C-busstructurestoconnecttonewsystems,too,soyoucanretainyouroriginaldesigninvestmentwhileextendingthelifespanofolderI2C-bussystems.

Benefi ts of the I2C-bus}Defactoworldstandard}Fasttime-to-market}Proven,robustperformance}Verywiderangeoffunctions}Easytodesignin}Simpletodebug}Fasttotestandassemble}Reducesoverallcost

SDA

µControllerI

µControllerII

GPIO A/DD/A

LCDDrivers

RTC

SCL

I2C-bus structure

3I2C-bus logic selection guide

Broad-based solutions from the inventor of the technology

µC

GPIO LEDblinkers DIP switch Data

converter

EEPROM LCDsegment

RTC & calendar

8

Temp sensor

Bus expander, hub or

repeater

port or port emulation

µCParallel-to-

PCA9541 demux

Mux & switch

VCC0

VCC2

VCC1

VCC3

VCC4

SPIUART

VCC5

I²C-bus slave

I²C-bus hardware

I²C-busbridge

I²C-bus bridge

GTLP

2500

655

400

35

10

10 0 10 100 1000

1

0.1

BTLETL

General-purpose logic

1394.a

RS-232

RS-422

RS-423

LVDS=RS-644ECL/PECL/LVPECL

RS-485

I2C

I2C-bus slave data can be transmittedlonger distances using bus

buffers like the P82B96

New Fast-mode Plus devices operate at

1 MHz with higher drive

Backplane length (meters) Cable length (meters)

Dat

a tr

ansm

issi

on ra

te (M

bps)

CML

3.4 MHz

100 kHz

400 kHz

Online support for the I2C-bus I2C-bushomepage :www.nxp.com/i2cI2C-buslogichomepage :www.nxp.com/i2clogicBoardsandsamples :[email protected]

By supporting a range of performance levels, our I2C-bus devices deliver

maximum design fl exibility

We offer the widest range I2C-bus logic

Performance, simplicity, and ease of use

ThereareplentyofreasonswhytheI2C-bushasenduredformorethantwodecades.First,there’sperformance.Thetechnologyhascontinuedtoevolveandtodaysupportsseveralspeedgrades.Buscapacitancehasalsoincreased,withhubs,busrepeaters,bidirectionalswitches,andmultiplexersthatsupportmoredevicesoverlongerdistances–offthecard,outofthecabinet,orevenacrosstheroom.

Beyondperformance,though,there’seaseofuse.AllittakesittwosimplelinestoconnecteveryICinthesystem.AnyI2C-busdevicecanbeattachedtoacommonI2C-bus,andanymasterdevicecanexchangeinformationwithanyslavedevice.Thesoftware-controlledaddressingschemeeliminatesaddress-decodinghardware,andthere’snoneedtodesign

anddebugexternalcontrollogicbecauseit’salreadyprovidedbytheI2C-busprotocol.Thatmeansyoucanmovequicklyfromblockdiagramtofinalhardware,simplyclippingnewdevicesandfunctionstoanexistingbus.

TheI2C-busalsosavesspaceandlowersoverallcost.Thetwo-linestructuremeansfewertracelines,sothePCBcanbethatmuchsmaller.Havingfewertracelinessimplifiesdebugandtest,too,sincetherearefewerlinestocheckandfewerinformationsourcestoverify.What’smore,asthesystemevolvesoverseveralgenerations,newI2C-busdevicescanbeaddedorremovedeasily,withoutimpactingtherestofthesystem.


Taking I2C-bus to the next level

Our I2C Demonstration Board 2005-1 makes it easy to demo I2C-bus devicesand learn about the I2C-bus


Taking I2C-bus to the next level

Old design New design needs more control lines

I2C-bus solves the problem

Simple LCD with backlight

Aux keypad

LED array

Aux keypad

LED array

microcontroller microcontroller

I2C-bus LED blinker

I2C-bus

microcontroller

Connectors

SCL

SDA

Transceivers

I2C-bus master or slave devices

Hot Swap Bus Buffer

S-Video 4:2:2/4:4:4

16 bit/24 bit YCcCr/RGB

4:2:2/4:4:4

16 bit/24 bit YCcCr/RGB

CVBS1

CVBS2

RF

Video decoder

Video decoder

Tuner

Display chip LCDpanel

Audio

Powersupply

100/133 MHz

SDRAM

50 MHz MCU

DIP switch

Mode Select Data ROM

EEPROM

DDC

Relay

Keypad

Expander or switchGPIO

100/400kHz

LEDblinker

LED control

Buscontrol

Digital RGB

Hsync, Vsync

Main

PIP

I2C-bus

PCA9517

Processor

or

PCA9665

12-V DC

P82B96

PCA9698

PCA9698

PCA9698

Motor controller

I/O expander

LCD display driver

LCD display

PCA9633

P82B96

I2C-bus

I2C-bus

I2C-bus

I2C-busI2C-bus

8-bit I/O

Distribution hub

• Four-wire distribution cables• SCL and 12-V lines on one wire pair, SDA and GND on the other• Easily scalable (only distribution hub to be modified)• Fast-mode Plus PCA96xx devices have 10x the normal I²C-bus drive and don't require a bus buffer to operate on buses up to 4,000 pF.

Portable device applications LCD TV

Modular and medical applications and gamingHot Swap applications including cPCI, VME, and advanced TCA

� I2C-bus logic selection guide

PORSupply

SDA

OSC

SCL

A2

A1

A0

Internal / externaloscillator

Dataregisters

Analogreference

I2C-businterface

Sub addressdecoder

Chip enable

Operationcontrol

Control

SDA

SCL

Bus buffer Microcontrollerdata

I 2C-bus interface

Write strobe Read strobe ResetAddress inputs Interrupt request

/8

SDA SDA

SCL SCL

Enable

I2C-bus analog-to-digital converters

} Convertsignalsfromdigitaltoanalog,analogtodigital

} Internaloscillator

} PowerOnReset(POR)

Parallel-bus-to-I2C-bus controllers

} Interfacemost8-bitparallel-busmicrocontrollersandmicroprocessorstoI²C-bus

} ParallelbussystemcommunicatesbidirectionallywithI²C-bus

} Providesmasterandslavefunctions

} I²C-buscommunicationscarriedoutonbyte-wisebasis,usinginterrupt

orpolledhandshakes

} Multi-mastercapable

}68-bytebuffer(PCA9665)

} Seepage10forSPIorUARTtoI2C-busbridges

} BidirectionalI²C-busdriversisolate

I²C-buscapacitance,accommodating

moreI²C-busdevicesandlonger

buslength

} Upto400-pFloadoneachsegment,

4000-pFforP82Bdevices

andPCA9600

PCA9691 Fm+1-MHz4-channel8-bitA/DandD/Aconverter

PCF8591 100-kHz4-channel8-bitA/DandD/Aconverter

TDA8444 8-channel6-bitD/Aconverter

P82B715 I²C-busextender

P82B96 DualbidirectionalI²C-busbuffer

P82B485 DifferentaildualbidirectionalI2C-busbuffer

P82B486 DifferentialtriplebidirectionalI2C-busbuffer

PCA9507 I2C-busrepeaterwithrisetimeaccellerator

PCA9508 LeveltranslatingI2C-busrepeaterforcableapplications

PCA9509 Low-voltageI²C-busrepeater

PCA9510A/11A/12A/13A/14A I²C-busHotSwapbusbuffers

PCA9515/15A I²C-busrepeater

PCA9516/16A 5-channelI²C-bushub

PCA9517/17A Low-voltageI²C-busrepeater

PCA9518A Expandable5-channelI²C-bushub

PCA9519 4-channellow-voltageI²C-busrepeater

PCA9600 Fm+dualbidirectionalI2C-busbuffer

PCA9564 400-kHz2.3-to-3.6-VI²C-buscontroller

PCA9665 Fm+2.3-to-3.6-VI²Cbuscontroller

PCF8584 100-kHz4.5-to-5.5-VI²C-buscontroller

I2C-bus product families

} Differentvoltages(3.3or5V)oneach

segment

} Devicestransparenttobusarbitration

andcontentionprotocolsin

multi-masterenvironment

} Twisted-pairdifferentialtransmission

oropto-electricalisolationofI²C-bus

(P82B96orPCA9600)

I2C-bus repeaters, hubs, and extenders

�I2C-bus logic selection guide

Mux select

SDA

SCL

Mux

EEPRO

M

Output

Default

Supply

Reset POR

I2C-businterface

Latches Input/outputstages

Sub-addressdecoder

Oscillator

SDA

SCL

A2

A1

A0

I2C-bus general-purpose I/O (GPIO) expanders

Supply Interrupt

Reset POR

I2C-businterface

Latches Input/outputstages

Sub-addressdecoder

Interrupt

SDA

SCL

A2

A1

A0

I2C-bus EEPROM-based DIP switches

} ReplacejumpersandDIPswitches}Hands-freemanipulationviaintegrated,I²C-bus-controlled

EEPROMandmultiplexer} ProgramandstoresettingsinI²C-bus-controlledEEPROMregister}Multiplexbetweendefaultvaluesandstoredsettings}Non-volatilememoryretainsregistervalues,evenonpower-down

} ConnectparallelI/OtoserialI2C-busor

SMBusandprovideI/Oexpansion

} Quasioutput:uppertransistorison

forhalfaclockcycleandthenheldup

byaweakcurrentsource(25-mAsink)

} ExtendGPIOfromI²C-busorSMBus

} TrueOutput:configurableasinputor

outputwithpolarityinversion

(push/pullwith25-mAsinkand

10-mAsource)

I2C-bus LED dimmers/blinkers

} General-purposeI/OandLEDcontrol

} Noexternalcomponentsrequired:

internaloscillatorprovidestwo

(256-step,user-definable)

frequencyanddutycycles

} Twoprogrammableblinkrates

} On/off/blinkordimLED

} LEDbrightnesscontrolledbysetting

frequencyto152Hzandchangingduty

cycletovaryLED’saveragecurrent

} Extrapinscanbeusedasinputs

oroutputs

} Hardwareresetpinforstatemachine

} Open-drainoutputscapableof

25-mAsink

PCA8550 4-bitmultiplexed/1-bitlatched5-bitI²C-busEEPROM

PCA9559 5-bitmultiplexed/1-bitlatched6-bitI²C-busEEPROM

PCA9560 Dual5-bitmultiplexed/1-bitlatchedI²C-busEEPROM

PCA9561 Quad6-bitmultiplexedI²C-busEEPROM

Quasi output (weak current source)

PCA8574/74A 8-bitwithinterrupt

PCA8575 16-bitwithinterrupt

PCA9500 8-bitwith2-kbitEEPROM

PCA9501 8-bitwith2-kbitEEPROM,interrupt

PCA9558 8-bitw/5-bitDIP,2-kbitEEPROM

PCA9670 Fm+8-bitwithreset

PCA9671 Fm+16-bitwithreset

PCA9672 Fm+8-bitwithinterrupt,reset

PCA9673 Fm+16-bitwithinterrupt,reset

PCA9674/74A Fm+8-bitwithinterrupt

PCA9675 Fm+16-bitwithinterrupt

PCF8574/74A 8-bitwithinterrupt

PCF8575/75C 16-bitwithinterrupt

LED dimmers (Freq. range: 152 Hz to 1.69 sec.)

PCA9530 2-bitLEDdimmer




PCA9632/33 Fm+4-bit5-PWMLEDcontroller

PCA9634 Fm+8-bit9-PWMLEDcontroller

PCA9635 Fm+16-bit17-PWMLEDcontroller

PCA9685 Fm+16-bit4KstepLEDcontroller

LED blinkers (Freq. range: 152 Hz to 1.69 sec.)

PCA9550 2-bitLEDblinker




PCA9625 Fm+LEDcontroller(24V,100mA)

SAA1064 4x7I2C-busLEDdriverwithdecimal

True output (configur able push/pull)

PCA9502 8-bitSPI/I2Cwithinterrupt,reset

PCA9505/06 40-bitwithinterrupt,reset,OE

PCA9534/54/54A 8-bitwithinterrupt

PCA9535/35C/55 16-bitwithinterrupt

PCA9536 4-bit

PCA9537 4-bitwithinterrupt,reset



PCA9557 8-bitwithreset

PCA9698 Fm+40-bitwithinterrupt,

reset,OE

� I2C-bus logic selection guide

SCLSDA

I2C-buscontroller

I2C-bus 0

I2C-bus 1

Interrupt 0

OFF

Interrupt 1

Interrupt

Reset

Supply

32 kHz

SDA

SCL

A0

Counters:year, month, day,

hour, minute, second

(240-byte RAM 8583)

Alarm and timer registers

I2C-businterface

Interrupt

Oscillator/prescaler

POR

Sub-addressDecoder

Interrupt

SDA

SCLControl logic

RAM Sequencer

Segment(column)

driver

Bias voltagegenerator

Backplane(row)driver

Power supplies

I2C-bus multiplexers and switches

} FansI²C-busouttomultiple

I²C-buses

} BusesselectedviaI²C-buscommands

frommaster

} Multiplexersandswitchesselectone

downstreamI²C-busatatime

} Switchescan,inbroadcastmode,

turnonallchannelssimultaneously

} Interruptsarecollectedandsent

tomaster

} Resetpindeselectsallchannels,

somastercanregaincontrolifbus

hangsup

} Designedforaddressconflict

resolution,I²C-bussub-branch

isolation,I²C-buslevelshifting,etc.

I2C-bus real-time clocks

} 32.768-kHzquartzoscillator

} Year,month,day,hour,minute,second(1/100-secresolution)

} Alarmandtimerfunctions

} Wideoperatingsupplyvoltagerange(1.0to5.5V)

} Opendraininterruptpin

} Lowback-upcurrent(0.25µAat3V)

} Low-voltagedetection

} Temperaturecompensation,integratedquartz

I2C-bus LCD drivers

} Lowpower

} On-chipbias

} Temperaturecompensation

} Blinking

} Noexternalpartsrequired

PCA8565 High-temperature(125°C)I²C-busreal-timeclock

PCF8563 Low-powerI²C-busreal-timeclock

PCF8583 I²Creal-timeclockwith240-byteRAM

PCF8593 I²Creal-timeclockwith1/100-secondresolution

PCF2128 RTCwithintegratedtemperaturecompensatedquartzoscillator

PCF2113/2116/2119 I²C-busLCDcharacterdisplay

PCF8531/8535/8811 I²C-busLCDgraphicdrivers

PCF8533 80-to-320segmentI2C-busLCDsegmentdriver

PCF8534A 60-to-240segmentI2C-busLCDsegmentdriver

PCF8562 32-to-128segmentI²C-busLCDsegmentdriver

PCF8566 24-to-96segmentI²C-busLCDsegmentdriver

PCF8576D 40-to-160segmentI²C-busLCDsegmentdriver

PCF8577C 32-to-64segmentI²C-busLCDsegmentdriver

PCF8578/79 >384segmentI²C-busLCDsegment/dotdriver

PCA9540B 1-to-2multiplexer

PCA9541 2-to-1masterselectw/int,reset

PCA9542A 1-to-2multiplexerwithinterrupt

PCA9543A/B/C

1-to-2switchw/interrupt,reset

PCA9544A 1-to-4multiplexerw/interrupt

PCA9545A/B/C

1-to-4switchw/interrupt,reset

PCA9546A 1-to-8switchwithreset

PCA9547 1-to-8multiplexerwithreset

PCA9548A 1-to-8switchwithreset

PCA9549 8-bitbusswitchwithreset

I2C-bus product families


Addresspointer

256-byteEEPROM

PORSupply

SDA

SCL

A2

A1

A0

I2C-businterface

Sub-addressdecoder

LM75A

SupplyPOR

I2C-businterface

Sub-addressdecoder

Interrupt

Thresholdhysteresis

ADC

INT

SDA

SCL

A2

A1

A0

1.8 V

1.5 V

5 V

200 K

356

356

1.2 V

1.0 V

VCORE VCC

CPU I/O

GND

SREF

S1

S2Chipset I/O

GREF

DREF

D1

D2

GTL2002

I2C-bus Serial EEPROMs

} Widevoltagerangeminimizes

EEPROMinventory

} I²C-busreads/writesinformation

to/frommemory

} Widevoltagerange(2.5to5.5V)

} 1,000,000read/writecycles

} 10-yeardataretention

I2C-bus temperature and voltage sensors

} HardwaremonitorsuseI²C-bustoreporttemperatureand/orvoltage

} Remotesensorismoreaccuratethanpackage-mountedsensors

(analoginputpinsletexternaltransistorsanddiodes–inaprocessor,

forexample–performveryprecisetemperaturesensing)

} SE97/98perJEDECspecificationforRDIMMandSO-DIMMapplications

I2C-bus voltage-level translators

} Voltagetranslationbetweenanyvoltagefrom1.0to5.0V

} Opendrainonbothsideswithnodrive

} Bidirectionalvoltagetranslationwithnodirectionpin

} Referencevoltageclampsinputvoltagewithlowpropagationdelay

} Supportsbidirectionaltranslationofnormal3.3-and/or5.0-VI²C-bussignals

tolow-voltageI²C-busprocessorports

} BiCMOSprocessforexcellentESDperformance(exceptPCA9306)

LM75A/B ±2°ClocalI2C-bustemperaturesensorandthermalwatchdog™

NE1617A ±2°Clocal/remoteI2C-bustemperaturemonitor

NE1619 ±2°Clocal/remoteI2C-bustemperatureandvoltagemonitor

SA56004 ±1°Clocal/remotedigitaltempsensorwithover-tempalarms

SE95 ±1°ChighaccuracylocalI2C-bustemperaturesensorandthermalWatchdog

SE97 ±1°ClocalI2C-bustemperaturesensorwith2-KbitEEPROMSPD

SE98 ±1°ClocalI2C-bustemperaturesensor

GTL2000 22-bitbidirectionalI2C-busvoltage-leveltranslator




PCA9306 BidirectionalI2C-busandSMBusvoltage-leveltranslator

PCA24S08 1024x8-bit(8-kbit)I2C-busserialEEPROMwithsecurityfeatures

PCF8570 256x8-bit(2-kbit)I2C-busstaticlow-voltageRAM

PCF8581(C) 128x8-bit(1-kbit)I2C-busserialEEPROM

PCF8582C-2 256x8-bit(2-kbit)I2C-busserialEEPROM




PCF85103C-2 256x8-bit(2-kbit)I2C-busserialEEPROMwithalternateI2Caddress

PCF85116-3 2048x8-bit(16-kbit)I2C-busserialEEPROM


I2C-bus product familiesHigh-speed I2C-bus / SPI-slave bridge to UART / IrDA / GPIO

} CommunicationbetweenSPI/

I²C-busslaveandhigh-speedUART

} Lowpower,lowvoltage

} Minimalhostconnection

} BroadbandUART(5Mbps)

} Enablecommunicationbetween

I²C-busorSPIandRS232orRS485

} IrDAinterfaceforwirelesslinks

} ConfigurableGPIO

} SPIspeed:4to15Mbps

} I²C-busspeed:400kbps

} Highdatathroughputandintegrity

SPI-slave bridge to I2C-bus master / GPIO

System

Hostprocessor

I2C/SPImaster

I2C-bus/SPI I2C/SPIslave

GPIO

Transceiver(optional)

RS232/485Remote systems

Modem

Handheld cradle

Remote control PDA

Cell phone

Fan control Keypad

Leds

SC161S752/762bridge

UART/lrDA

UART/lrDA

SC16is7 xx usage scenarios

CPU 1

SPImaster

CPU 2

SPIslave

I2C-busmaster

I2C-bus

I2Cmaster

I2C-bus slave devices

I2C-bus EEPROM(PCF85116)

I2C-bus LED dimmer(PCA9531)

I2C-bus GPIO(PCA9554A)

5GPIO

Peripherals

LEDs, switches

SPIbus

SC18IS600

UART bridge to I2C-bus master with GPIO

} ControlconnectionbetweenUARThostandI²C-bus


} Fast-mode400kHzI²C-busdeviceinterface

} ProgrammableGPIOandbaudrate

} EnablesUARTconnectivitytotheI2C-bus


} Multimastercapable

} Controlconnectionbetween

SPIhostandI²C-bus


} Full-duplexhigh-speedSPIinterface

} SPIspeed:1to3Mbps

} FastI²C-busdeviceinterface

} Enablescommunicationbetween

SPIandI²C-bus

} ProgrammableGPIO


SC16IS750 I²C-bus/SPI-slavebridgetosingleUARTwith64-byteFIFOs,115.2-kbpsIrDASIR,8GPIO

SC16IS752 I²C-bus/SPI-slavebridgetodualUARTswith64-byteFIFOs,115.2-kbpsIrDASIR,8GPIO

SC16IS760 I²C-bus/SPI-slavebridgetosingleUARTwith64-byteFIFOs,1.152-MbpsIrDASIR,8GPIO

SC16IS762 I²C-bus/SPI-slavebridgetodualUARTswith64-byteFIFOs,1.152-MbpsIrDASIR,8GPIO

SC16IS740 I2C-bus/SPI-slavebridgetosingleUARTwith64-byteFIFOs,115.2-kbpsIrDASIR

SC16IS850 I2C-bus/SPI-slavebridgetosingleUARTwith128-byteFIFOs,115.2-kbpsIrDASIR

SC16IS852 I2C-bus/SPI-slavebridgetodualUARTwith64-byteFIFOs,115.2-kbpsIrDASIR

SC18IM700 UARTbridgetoI²C-busmasterwithGPIO

SC18IS600 SPI-slavebridgetoI²CmasterwithGPIO,internalclock

SC18IS601 SPI-slavebridgetoI2CmasterwithGPIO,externalclock

SC18IS602 I2C-bus-slavebridgetoSPImasterwithGPIO,externalclock

SC16is7xx usage scenarios

Hostprocessor

UART UART I2C-busmaster

I2CBUS

I2C-BUS slave devices

I2C-bus EEPROM(PCF85116) AE

I2C-bus LED dimmer(PCA9531) CE

I2C-bus GPIO(PCA9554A)

6GPIO

Peripherals

LEDs, switches

RS232

SC18IM700bus

Development kits for bridge ICs

I²C-bus/SPItoUART(SC16IS7xx)

EasyinterfacebetweenanI²C-bus/SPIhostandIrDA,RS232/RS485,andGPIOdevices.Thebusinterfaceisselectablefor

I²C-busorSPI.Kitincludessamplecodewithdeviceinitialization(UART,RS485)andIrDAcommunications,plususermanual.

UARTtoI²C-bus(SC18IM700)

EasyinterfacebetweenaUARThostandvariousI²C-busandGPIOdevices.KitincludessamplecodewithSC18IM700UART

messagesandcommandsforNXPI²C-busslavedevices,plususermanual.

SPItoI²C-bus(SC18IS60x)

EasyinterfacebetweenanSPIhostandvariousI²C-busandGPIOdevices.TheboardalsoincludesanI²C-busEEPROMandanLEDdimmer.KitincludessamplecodewithSC18IS80xSPImessagesandcommandsforNXPI2C-busslave,plususermanual.


Problem Solution Suggested parts

Puttingtoomanyofthesamedevicesonthebuscausesanaddressconflict.

Useamultiplexertobreakaddressspaceintosub-branches.Masterselectswhichsub-branchtoaddressunderI²C-BUScontrol.Twotoeightsub-branchesareavailablepermultiplexer.

PCA9540B,41,42A,43A/B/C,44A,45A/B/C,46A,47,48A,49

Ineedmoredevicesthanthe400-pFleadallows.

Useamultiplexertobreakupthecapacitancebysub-branch.Sub-branchesareaddressedindividually.

Usearepeaterorhubtoaddressalldevicesatthesametime(becarefulofaddressconflicts).

UseFast-modePlusdevices.

PCA9540B,41,42A,43A/B/C,44A,45A/B/C,46A,47,48A,49

PCA9507,08,09,15,15A,16,16A,17,17A18A,19

PCA9632,33,34,35,70,71,72,73,74,74A,75,98,withPCA9600frommasterorPCA9665

IhavetosendI2C-bussignalsthroughareallylongcable.

UseanI²C-busextendertoaddhighdrivetoanyI²C-bus.Guidelines(80pFpermeter)for400kHzareatleast20mandfor30kHzareatleast1000m.

P82B715,P82B96,andPCA9600with30-mAdrivePCA9507,08,17,17Awith6-mAdrive

Ihaveamixed-voltageenvironmentthatcausesconflictsontheopen-drainI2C-bus.

Useaswitchtodynamicallysplitthebusbypullingdownstreamchannelstodifferentvoltages.

PCA9543A/B/C,45A/B/C,46A,48AGTL2002,2010,2000,PCA9306PCA9507,08,09,12A,17,17A,19

Ihaveslow(100-kHz)andfast(400-kHz)partsonthesamebus.HowcanIisolatethemtogetthemostperformancefromthe400-kHzdevices?

Useabusrepeaterandhavethemasterdisablethe100-kHzsegmentduring400-kHzcommunication.

PCA9508,15,15A,16,16A,17,17A,18A

PCA9540B,42A,43A/B/C

Ihavetwomastersinmyfault-tolerantsystem,oneactiveatatime.HowdoIselectonemasterovertheother?

UseanI²C-busmasterselectortoswitchfromafailingmastertoitsbackup.Theselectoralsoprovidesisolation.

PCA9541

IsupportHotSwapinmyfault-tolerantsystem.HowcanIkeepI²C-bustrafficundisturbedduringaswap?

UseanI²C-busHotSwapbusbuffertodetectbus-idlecondition,isolatecapacitance,andpreventbusglitches.

PCA9510A,11A,12A,13A,14APCA9508

IneedtoaddanewI²C-busporttoahost. UseabuscontrollertocreateanewI²C-busport.Youmaynotneedanewport.Amultiplexeroraswitchmaygiveyouthefeaturesyouneed.

PCA9564,PCF8584,PCA9665PCA954x

TheI²C-busis“multi-drop”andanydevicecanhangthebus.HowcanImakethisbusmorefault-tolerant?

Breakthebusintodifferentbranchestocreatea“star”configuration.Multi-castisallowed.ThemastersetstheconfigurationviaI²C-bus.

PCA9543A/B/C,45A/B/C,46A,48ASimplediscretecircuitrywithanybuffercandetectandisolatefailedsections.

I2C-bus FAQs


I2C-bus product summary

Type of function in device Features

Vcc range (V) Freq (kHz) Temp(°C) Packages

I/O

exp

and

er(b

its)

LED

blin

ker

(bit

s)

MU

X/l

atch

/EE

PRO

M(b

its-

lahe

db

its-

reg

iste

r)

MU

X/s

wit

ch(in

/out

cha

nnel

s)

Rep

eate

rhu

b(in

/out

seg

men

t)

Bus

co

ntro

ller

Tem

per

atur

ese

nso

r

Volt

age

mea

sum

ent

RA

M/E

EPR

OM

(kb

its)

Rea

ltim

ecl

ock

/cal

end

er

Ana

log

/dig

ital

co

nver

ter

LCD

dri

ver

Num

ber

ofa

dd

ress

es

Inte

rrup

t(I/

O)

Har

dw

are

rese

t

Cur

rent

(per

bit

/to

tal

mA

)

1.0

1.8

2.5

3.3

5 5-V

to

lera

nt

100

400

100

0

0to

70

-40

to8

5

-55

to1

25

Pin

coun

t

DIP

SO(n

arro

w)

SO(

wid

e)

SSO

P

QSO

P

TSSO

P

HV

QFN

GTL2000 NA • • • • • • • • • • 48 DL DGG

GTL2002 NA • • • • • • • • • • 8 DP DC/GM

GTL2010 NA • • • • • • • • • • 24 D PW BS

LM75A/B 2°C 8 0/1 2.8 • • • • • • 8 D DP

NE1617A 2°C 9 0/1 • • • • 0to125 16 DS

NE1619 2°C • 2 • • • • • 0to125 16 DS

P82B485 1-1 • • • • • • • 10 DP

P82B486 1-1 • • • • • • • 14/16 D PW

P82B715 1-1 NA • • • • • 8 PN TD

P82B96 1-1 NA • • • • • • -40to125 8 PN TD DP

PCA24S08 8 1 • • • • • 8 D DP

PCA8550 4-1-1 1 • • • • • 16 D DB PW

PCA8565 • 1 0/1 • • • • • • • • -40to125 8 DP

PCA8574 8 8 0/1 25-200 • • • • • • • • 16 D TS PW

PCA8575 16 8 0/1 25-400 • • • • • • • • 24 D DB DK PW BS/BQ

PCA8581/81C 1 8 • • • • • -25to85 8 PN TD

PCA9306 NA • • • • • • • • • • 8 D DP DC/GM

PCA9500 8 2 2-8 25-100 • • • • • 16 D PW BS

PCA9501 8 2 2-64 0/1 25-100 • • • • • 20 D PW BS

PCA9502 8 8 0/1 • 10-80 • • • • • 16 BS

PCA9505/06 40 8 0/1 • 15-600 • • • • • • • 56 DGG BS

PCA9507 1-1 • • • • • • • 8 D DP

PCA9508 1-1 NA • • • • • • • • • 8 D DP

PCA9509 1-1 NA • • • • • • • • • 8 D DP

PCA9510A,11A,12A,13A,14A 1-1 NA • • • • 8 D DP

PCA9515/15A 1-1 NA • • • • • • 8 D DP

PCA9516/16A 1-4 NA • • • • • • 16 D DP

PCA9517/17A 1-1 NA • • • • • • • 8 D DP

PCA9518A 1-4 NA • • • • • • 20 D PW

PCA9519 4-4 NA • • • • • • • • • 20/24 PW BS

PCA9530 2 2 • 25-50 • • • • • • • 8 D DP

PCA9531 8 8 • 25-100 • • • • • • • 16 D PW BS/BS3

PCA9532 16 8 • 25-200 • • • • • • • 24 D PW BS

PCA9533 4 2 25-100 • • • • • • • 8 D DP

PCA9534 8 8 0/1 25-100 • • • • • • • 16 D PW BS/BS3

PCA9535/35C 16 8 0/1 25-200 • • • • • • • 24 D PW BS

PCA9536 4 1 25-50 • • • • • • • 8 D DP

PCA9537 4 1 0/1 • 25-50 • • • • • • • 10 DP

PCA9538 8 4 0/1 • 25-100 • • • • • • • 16 D PW BS

PCA9539 16 4 0/1 • 25-200 • • • • • • • 24 D PW BS

PCA9540B 1-2 1 • • • • • • • 8 D DP

PCA9541 2-1 16 1/2 • • • • • • • • 16 D PW BS

PCA9542A 1-2 8 2/1 • • • • • • • 14 D PW

PCA9543A/B/C 1-2 4 2/1 • • • • • • • • 14 D PW

PCA9544A 1-4 8 4/1 • • • • • • • 20 D PW BS

PCA9545A/B/C 1-4 4 4/1 • • • • • • • • 20 D PW BS

PCA9546A 1-4 8 • • • • • • • • 16 D PW BS

PCA9547/48A/49 1-8 8 • • • • • • • • 24 D PW BS

PCA9550 2 2 • 25-50 • • • • • • • 8 D DP

PCA9551 8 8 • 25-100 • • • • • • • 16 D PW BS/BS3

PCA9552 16 8 • 25-200 • • • • • • • 24 D PW BS

PCA9553 4 2 25-100 • • • • • • • 8 D DP TK

PCA9554/54A 8 8 0/1 25-100 • • • • • • • 16 N D TS PW BS/BS3

PCA9555 16 8 0/1 25-200 • • • • • • • 24 N D DB PW BS

PCA9557 8 8 • 25-100 • • • • • • • 16 D PW BS

PCA9558 8 5-1-1 2 2 25-100 • • • • • 28 PW

PCA9559 5-1-1 4 20-80 • • • • • 20 PW

PCA9560 5-1-2 4 25-100 • • • • • 20 D PW

PCA9561 6-0-4 4 25-100 • • • • • 20 D PW

PCA9564 • 128 0/1 • • • • • • • 20 N D PW BS


Type of function in device Features

Vcc range (V) Freq (kHz) Temp(°C) Packages

I/O

exp

and

er(b

its)

LED

blin

ker

(bit

s)

MU

X/l

atch

/EE

PRO

M(b

its-

lahe

db

its-

reg

iste

r)

MU

X/s

wit

ch(in

/out

cha

nnel

s)

Rep

eate

rhu

b(in

/out

seg

men

t)

Bus

co

ntro

ller

Tem

per

atur

ese

nso

r

Volt

age

mea

sum

ent

RA

M/E

EPR

OM

(kb

its)

Rea

ltim

ecl

ock

/cal

end

er

Ana

log

/dig

ital

co

nver

ter

LCD

dri

ver

Num

ber

ofa

dd

ress

es

Inte

rrup

t(I/

O)

Har

dw

are

rese

t

Cur

rent

(per

bit

/to

tal

mA

)

1.0

1.8

2.5

3.3

5 5-V

to

lera

nt

100

400

100

0

0to

70

-40

to8

5

-55

to1

25

Pin

coun

t

DIP

SO(n

arro

w)

SO(

wid

e)

SSO

P

QSO

P

TSSO

P

HV

QFN

PCA9600 1-1 • • • • • • • 8 D DP

PCA9625 16 126 100-1600 • • • • • • • • 32 D PW

PCA9632/33 4 126 25-100 • • • • • • • • 8/10/16 D DP/PW TK/BS

PCA9634 8 126 25-200 • • • • • • • • 20 D PW BS

PCA9635 16 126 25-400 • • • • • • • • 28 D PW BS

PCA9665 • 128 0/1 • • • • • • • • 20 N D PW BS

PCA9670 8 64 • 25-200 • • • • • • • • 16 D PW BS

PCA9671 16 64 • 25-400 • • • • • • • • 24 D DB DK PW BS/BQ

PCA9672 8 64 0/1 • 25-200 • • • • • • • • 16 D PW BS

PCA9673 16 64 0/1 • 25-400 • • • • • • • • 24 D DB DK PW BS/BQ

PCA9674/74A 8 64 0/1 25-200 • • • • • • • 16/20 D TS PW BS

PCA9675 16 64 0/1 25-400 • • • • • • • 24 D DB DK PW BS/BQ

PCA9685 16 126 24-400 • • • • • • • 28 PW BS

PCA9691 8 64 • • • • • • • • 16 PN TD BS

PCA9698 40 64 0/1 • 25-1000 • • • • • • • 56 DGG BS

PCF2113 24ch 2 • • • • • • • 100 LQFP100

PCF2116 48-ch 2 • • • • • • DIEPCF2119 32ch 2 • • • • • • • DIE

PCF2128 • 2 1 • • • • • • • • 20 TD

PCF85116-3 16 1 • • • • • 8 N D

PCF8531 graphic 8 • • • • • • • • DIE

PCF8533 graphic 8 • • • • • • • • DIE

PCF8534A 320 8 • • • • • • • • LQFP80

PCF8535 240 4 • • • • • • DIE

PCF8562 128 3 • • • • • • 48 LQFP48

PCF8563 • 1 0/1 • • • • • • • • • 8 PN TD DP

PCF8566 96 16 • • • • • • 40 PN VSO40

PCF8570 2 8 • • • • • • 8 PN TD

PCF8574/74A 8 4 0/1 20-100 • • • • • • 16 PN TD TS

PCF8575/75C 16 8 0/1 20-100 • • • • • • • 24 TSDB

PCF8576C/D 160 16 • • • • • • • 56/64 VSO56/LQFP64

PCF8577C 64 16 • • • • • • 40 PN VSO40

PCF8578/79 2 384+ 2 • • • • • • 56/64 VSO56/LQFP64

PCF8582C-2/102C-2/103C-2 2 8 • • • • • • 8 N D

PCF8583 • 2 0/1 • • • • • • • • 8 PN TD

PCF8584 • 128 0/1 • • • • • 20 PN TD

PCF8591 8 8 • • • • • • 16 PN TD

PCF8593 • 1 0/1 • • • • • • • • • 8 N TD

PCF8594C-2 4 4 • • • • • • 8 N D

PCF8598C-2 8 2 • • • • • • 8 N D

PCF8811 G 4 • • • • • • DIE

SA56004 1°C 8 0/2 • • • • -40to125 24 D DP

SAA1064 4x8 4 21-mA • • • • 24 P T

SC16IS750 8 1 • 10-80 • • • • • • • 28/32 PW BS

SC16IS752 8 1 • 10-80 • • • • • • • 24 PW BS

SC16IS760 8 1 • 10-80 • • • • • • • 28/32 PW BS

SC16IS762 8 1 • 10-80 • • • • • • • 24 PW BS

SC18IM700 • 1 0/1 • • • • • • • • 16 PW

SC18IS600 5 1 • 10-50 • • • • • • • 16 PW

SC18IS601 5 • 10-50 • • • • • • • 16 PW

SCIBIS602 5 • 10-50 • • • • • • • • 16 PW

SE95 1°C 8 0/1 2.8 • • • • • 8 D DP

SE97 1°C 2 8 0/1 • • • • • -20to125 8 PW TK/TL

SE98 1°C 8 0/1 • • • -20to125 8 PW TK

TDA8444 6 8 12V • • -20to70 16 P T

Data sheets can be downloaded at www.nxp.com/i2clogic or www.nxp.com/i2c


I2C-bus terminology

AlltheICsalonganI²C-busareeithermastersorslaves.AmasterisanICthatinitiatesadatatransfer,providestheserialclocksignal(SCL)duringthetransfer,andthenterminatesthetransfer.Therecanbemorethanonemasteronthebusatatime–theI²Csoftwareprotocolusesarbitrationandsynchronizationtopreventcollisionsanddataloss.Aslaveisanydeviceaddressedbythemaster.

Whilethemasterorslaveissendingdataovertheserialdataline(SDA),itisreferredtoasatransmitter.WhileacceptingdatafromtheSDAdataline,it’scalledareceiver.AmastertransmittercanputdataontotheSDAdatalineatanytime;aslavetransmittercandosoonlybyrequest.

Device addresses

EachdevicealongtheI²C-bushasaunique,7-bitI²C-busaddress.Thefirstfourbitsintheaddressaretypicallyfixed,indicatingdevicecategory(e.g.1010isassignedtoEEPROMs).Thelastthreebits(A2,A1,A0)aresetbyhardwareaddresspinsontheICpackage.Inthiscase,thereareuptoeightdifferentaddresscombinationsavailableforeachdevice,souptoeightidenticaldevicescanoperateonthesameI²C-bus.Theaddresspinsareheldhigh(1)toVccorheldlow(0)toGND.

R/W

1010100 R/W

1010A2A1A0

VDD

SCL

SDA

EEPROM

How the I2C-bus works

Transmitter Receiver

SDA

SCL

Master Slave

Master Slave

Receiver Transmitter

SDA

SCL

F S Slave address A Data A Data A P FW

Write data

< n data bytes > last data byte

F S Slave address A Data A Data A P FR

Read data

< n data bytes > last data byte

S = Start conditionF = FreeP = Stop condition

A = AcknowledgeR = Read (active high)A = Not AcknowledgeW = Write (active low)

I2C vs. SMBus

DevelopedbyIntelinthemid-1990s,theSystemManagementBus,alsoastheSMBus,isapopularderivativeoftheI²C-busthatis,inmostcases,compatiblewithI²C-bus.Bothbusesuseatwo-wirecommunicationschemeandhaveaddressableslaves.TheSMBusislimitedtoamaximumdatatransferrateofonly100kbps,requiringspecialhandlinginsystemsthatalsousethehighertransferratesavailablewithI²C-bus.Otherdifferencesincludetimeoutandminimumclockspeed,voltagelevels,pull-upresistorvalues,andcurrentlevels.

The data-transfer bitstream

“F”indicatesthebusisFree,oravailableforuse.DuringtheFreestatetheserialdataline(SDA)istransferringnodataandboththeSDAdatalineandtheSCLclocklinearehigh.

Totakecontrolofthebusandinitiateatransaction,themastersendsoutaStart(S)condition.Ifthemasteralreadycontrolsthebusandwantstoinitiateanadditionaltransaction,itsendsoutaRepeatStart(Sr)condition.Forthestartcondition,theSDAdatalinegoesfromhightolowwhiletheSCLclockremainshigh.

TheStartconditionisfollowedbythedesiredslaveaddressandtheinstructiontowrite(W)orread(R)data.TheslaverespondstothemasterbysendinganAcknowledge(A)bitandthetransferbegins.Duringdatatransfer,theSCLclocklineisbroughtandheldlow;theSDAdatalinecanbeeitherhighorlow.TheSDAdatalineonlychangesstatewhentheSCLclocklineislow.

Aftereachbyteissent,thereceiverwillAcknowledge(A)thetransmitter.Whenthemasteristhereceiver,itwillNotAcknowledge(A)thelastbytesoitcanregaincontrolofthebustoterminatethecommunication.Whenthemasterhascompletedthetransmission,itsendstheStop(P)conditiontofreethebus.FortheStopcondition,theSDAdatalinegoesfromlowtohighwhiletheSCLclocklineremainshigh.

Withthedatatransfercomplete,thebusreturnstotheFreestate,withbothlineshigh.


VisittheI²C-bushomepageatwww.nxp.com/i2clogicOrderevaluationkits,gettechnicalinformation,[email protected]

www.nxp.com

© 2007 NXP B.V.

All rights reserved. Reproduction in whole or in part is prohibited without the prior written

consent of the copyright owner. The information presented in this document does not

form part of any quotation or contract, is believed to be accurate and reliable and may be

changed without notice. No liability will be accepted by the publisher for any consequence

of its use. Publication thereof does not convey nor imply any license under patent- or other

industrial or intellectual property rights.

Date of release: December 2007

Document order number: 9397 750 15669

Printed in the Netherlands

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