LTC4316 - Single I2C/SMBus Address Translator

1 LTC 431614316faFor more information APPLICATIONFEATURESDESCRIPTIONS ingle I2C/SMBus Address Translator The LT C 4316 enables the hardwired Address of one or more I2C or smbus slave devices to be translated to a different Address . This allows slaves with the same hard-wired Address to coexist on the same bus. Only discrete resistors are needed to select the new Address and no software programming is required. Up to 127 different Address translations are LTC4316 incorporates a pass-through mode which disables the Address translation and allows general call addressing by the master. The LTC4316 is designed to automatically recover from abnormal bus conditions like bus stuck low or premature STOP NUMBERNUMBER OF INPUT CHANNELSNUMBER OF OUTPUT CHANNELSLTC431611 LTC431712 LTC431822 APPLICATIONSn Allows Multiple Slaves with the Same Address to Coexist on the Same Busn Resistor Configurable Address Translationn No Software Programming Requiredn Compatible with smbus , I2C and I2C Fast Moden Pass-Through Mode Allows General Call Addressingn 4kV HBM ESD Ruggednessn Level Translation for.

2 And 5V Busesn Stuck Bus Timeoutn Prevents SDA and SCL Corruption During Live Board Insertion and Removaln Support Bus Hot Swapn 10-Lead MSOP and DFN 3mm 3mm Packagesn I2C, smbus Address Expansionn Address Translationn Serversn TelecomL, LT, LT C, LT M, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by Patents, including 6356140, 6650174, 7032051, 7478286. Patent 0x34 SCLSDA5 VSLAVERECEIVESADDRESS 0x36 TRANSLATES BY 0x02 GNDXORHXORLLTC4316 VCC4316 TA01bTRANSLATIONBYTESDAOUTSCLINSDAINADDR ESS BITSSTARTBITa6a5a4a3a2a1a00110100= 0x340000010= 0x020000110110= 0x36R/WBITACKBITLTC 431624316faFor more information MAXIMUM RATINGSI nput Supply Voltage VCC.

3 To 6 VInput VoltagesENABLE .. to 6 VXORL, XORH .. to VCC + VoltageREADY .. to 6 VOutput CurrentsREADY, SDAOUT ..50mA(Notes 1, 2)ORDER INFORMATIONLEAD FREE FINISHTAPE AND REELPART MARKING*PACKAGE DESCRIPTIONTEMPERATURE RANGELTC4316 CDD#PBFLTC4316 CDD#TRPBFLGSW10-Lead (3mm 3mm) Plastic DFN0 C to 70 CLTC4316 IDD#PBFLTC4316 IDD#TRPBFLGSW10-Lead (3mm 3mm) Plastic DFN 40 C to 85 CLTC4316 CMS#PBFLTC4316 CMS#TRPBFLTGSV10-Lead Plastic MSOP0 C to 70 CLTC4316 IMS#PBFLTC4316 IMS#TRPBFLTGSV10-Lead Plastic MSOP 40 C to 85 CConsult LT C Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping more information on lead free part marking, go to: For more information on tape and reel specifications, go to: Some Packages are available in 500 unit reels through designated sales channels with #TRMPBF VoltagesSCLIN, SCLOUT, SDAIN, SDAOUT.

4 To 6 VOperating Temper atur e Range LTC4316C ..0 C to 70 C LTC4316I .. 40 C to 85 CStorage Temper atur e Range .. 65 C to 150 CTOP VIEWDD PACKAGE10-LEAD (3mm 3mm) PLASTIC DFN1011 GND967845321 SCLINSCLOUTSDAOUTSDAINREADYGNDXORHXORLVC CENABLE TJMAX = 150 C, JA = 43 C/W EXPOSED PAD (PIN 11) IS GND, PCB CONNECTION OPTIONAL12345 GNDXORHXORLVCCENABLE109876 SCLINSCLOUTSDAOUTSDAINREADYTOP VIEWMS PACKAGE10-LEAD PLASTIC MSOP TJMAX = 150 C, JA = 160 C/WPIN CONFIGURATIONLTC 431634316faFor more information CHARACTERISTICSNote 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime.

5 The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25 C. VCC = , unless otherwise Supply Supply CurrentENABLE = , SCLIN = SDAIN = = 0V, SCLIN = SDAIN = 0Vl350800 AVCC(UVLO)VCC Supply Undervoltage LockoutVCC (HYST)VCC Supply Undervoltage Lockout Hysteresis100mVENABLE and READYVENABLE(TH)ENABLE Threshold VoltageENABLE (HYST)ENABLE Hysteresis50mVIENABLE(LEAK)ENABLE Input Currentl 1 AVREADY(OL)READY Output Low VoltageI = (OH)READY Off Leakage CurrentVCC = VREADY = 5 ASCLIN, SDAIN, SCLOUT, SDAOUTVSCL,SDA(TH)Threshold VoltageSDA, SCL Pins ,SDA(HYST)Hysteresis50mVISCL,SDA(LEAK)Le akage CurrentSDA, SCL Pins = , 0V, VCC = , 0Vl 10 AISCL,SDA(LEAK-INOUT)

6 Input to Output Leakage CurrentSDAIN, SCLIN Pins = , VCC = , SDAOUT, SCLOUT Pins = 10 ACSCL,SDAPin CapacitanceNote 3l10pFVSCL,SDA(PRE)Precharge (OL)SDAOUT Output Low VoltageI = (ON)Pass Switch On ResistanceVCC = , SCLIN = SDAIN = VCC = , SCLIN = SDAIN = VCC = 5V, SCLIN = SDAIN = l l3 8 6 XORH, XORLIXORH/XORLXORH and XORL Input Currentl 100nAI2C Interface TimingfSCL(MAX)Maximum SCLIN Clock FrequencyNote 3l400kHztPDHL(SDAOUT)SDAOUT Fall DelayC = 100pF, RPULLUP = 10kl170300nstf(SDAOUT)SDAOUT Fall TimeC = 100pF, RPULLUP = 10kl2060300nstTIMEOUTS tuck Bus TimeoutSCLIN Held Low or Highl253035mstIDLEBus Idle Timel80120160 stGLITCHSCLIN and SDAIN Glitch Filterl50100nsNote 2: All currents into pins are positive and all voltages are referenced to GND unless otherwise 3.

7 Guaranteed by design and not 431644316faFor more information PERFORMANCE CHARACTERISTICSTIMING DIAGRAMPass Switch On Resistance vs TemperatureREADY Output Low Voltage vs CurrentSDAOUT Fall Delay vs TemperatureSupply Current vs TemperatureStandby Supply Current vs TemperaturePass Switch On Resistance vs VCCTA = 25 C, VCC = unless otherwise ECSDAOUTSDAIN50%tPDHL(SDAOUT)tf(SDAOUT)7 0%50%30%TEMPERATURE ( C) 50 ICC (mA) 2525754316 G01100 ENABLE = VCCVCC = = 5 VVCC = ( C) 50 ICC ( A)8007005003006004002001000050 2525754316 G02100 ENABLE = 0 VVCC (V) (ON) ( ) = 40 CTA = 85 CTA = 25 CSDAIN = SCLIN = ( C) 50 RDS(ON) ( )6531420050 2525754316 G04100 VCC = 5 VVCC = = = SCLIN = (mA)0 VREADY(OL) (mV)10080406020026484316 G0510TA = 40 CTA = 85 CVCC = = 25 CTEMPERATURE ( C) 50tPDHL(SDAOUT) (ns)240220200180160120140100050 2525754316 G06100 VCC = = 100pFLTC 431654316faFor more information PERFORMANCE CHARACTERISTICSSDAOUT Fall Delay vs Bus CapacitanceSDAOUT Fall Time vs TemperatureSDAOUT Fall Time vs Bus CapacitanceTA = 25 C, VCC = unless otherwise FUNCTIONSXORL: Translator XOR Lower Nibble Configuration Input.

8 The DC voltage at this pin configures the lower 4-bit nibble of the Address translation byte. Tie the pin to an external resistive divider connected between VCC and GND to set the desired DC : Translator XOR Upper Nibble Configuration Input. The DC voltage at this pin configures the upper 3-bit nibble of the Address translation byte. Tie the pin to an external resistive divider connected between VCC and GND to set the desired DC voltage. Connect this pin to VCC to activate pass-through mode. See Application Information section for more : Enable Input. If ENABLE pin is low, the Address translation is disabled, SDAIN is disconnected from SD-AOUT, and SCLIN is disconnected from SCLOUT.

9 A low to high transition on ENABLE restarts the configuration of the Address translation byte and also enables the Address translation. Connect to VCC if Pad (DFN Package Only): Exposed pad may be left open or connected to device : Device : Ready Status Output. This is an open drain output to indicate that the device is ready for Address translation. The pin releases high when the LTC4316 has completed configuration of the Address translation byte, SDAIN is connected to SDAOUT and SCLIN is connected to SCLOUT. Connect a pull-up resistor, typically 10k, from this pin to the bus pull-up supply. Leave open or tie to GND if : Input Bus Clock Input and Output.

10 Connect this pin to the SCL line on the master side. An external pull-up resistor or current source is : Output Bus Clock Input and Output. Connect this pin to the SCL line on the slave side. An external pull-up resistor or current source is : Input Bus Data Input and Output. Connect this pin to the SDA line on the master side. An external pull-up resistor or current source is : Output Bus Data Input and Output. Connect this pin to the SDA line on the slave side. An external pull-up resistor or current source is : Power Supply Input ( to ). If the supply voltages for the input and output buses are different, con-nect this pin to the lower supply. If the input and output supplies have the same nominal value and with tolerance less than or equal to 10%, connect VCC to either supply.