LTC4318 2 Dual I C/SMBus Address Translator Fea T Descrip T n Allows Multiple Slaves with the Same Address to The LTC 4318 enables the hardwired address of one or 2 Coexist on the Same Bus more I C or SMBus slave devices to be translated to a n Resistor Configurable Address Translation different address. This allows slaves with the same hard- n No Software Programming Required wired address to coexist on the same bus. Only discrete 2 2 n Compatible with SMBus, I C and I C Fast Mode resistors are needed to select the new address and no n Pass-Through Mode Allows General Call Addressing software programming is required. Up to 127 different n 4kV HBM ESD Ruggedness address translations are available. n Level Translation for 2.5V, 3.3V and 5V Buses The LTC4318 incorporates a pass-through mode which n Stuck Bus Timeout disables the address translations and allows general call n Prevents SDA and SCL Corruption During Live Board addressing by the master. The LTC4318 is designed to Insertion and Removal automatically recover from abnormal bus conditions like n Support Bus Hot Swap bus stuck low or premature STOP bits. n 20-Lead QFN 4mm 4mm Package NUMBER OF INPUT NUMBER OF OUTPUT PART NUMBER CHANNELS CHANNELS LTC4316 1 1 a T LTC4317 1 2 2 n I C, SMBus Address Expansion LTC4318 2 2 n Address Translation L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear n Technology Corporation. All other trademarks are the property of their respective owners. Servers Protected by U.S. Patents, including 6356140, 6650174, 7032051, 7478286. Patent pending. n Telecom Typical a T 3.3V 5V TRANSLATES V CC BY 0x02 SCL SCL SCLIN1 SCLOUT1 MASTER 1 SLAVE 1 R/W ACK START ADDRESS BITS BIT BIT SDA SDA SDAIN1 SDAOUT1 a6 a5 a4 a3 a2 a1 a0 SENDS RECEIVES LTC4318 SCLIN1 ADDRESS 0x34 ADDRESS 0X36 3.3V ENABLE1 READY1 SDAIN1 0 0 1 1 0 1 0 0 = 0x34 ENABLE2 READY2 5V TRANSLATION TRANSLATES 0 0 0 0 0 0 1 0 = 0x02 BYTE BY 0x04 SCL SCL SCLIN2 SCLOUT2 SLAVE 2 MASTER 1 SDAOUT1 0 0 1 1 0 1 1 0 = 0x36 4318 TA01b SDA SDA SDAIN2 SDAOUT2 XORH2 SENDS RECEIVES ADDRESS 0x32 ADDRESS 0X36 GND XORH1 XORL2 XORL1 3.3V 845k 61.9k 93.1k 4318 TA01a 4318fa 1 For more information www.linear.com/LTC4318 ion pplica ions pplica ion uresLTC4318 a Te Maxi Mu M r a T p in c F T (Notes 1, 2) TOP VIEW Input Supply Voltage V ............................. 0.3V to 6V CC Input Voltages ENABLEn ...................................................... 0.3V to 6V 20 19 18 17 16 XORLn, XORHn ................................0.3V to V + 0.3V CC XORH2 SCLIN1 Output Voltages 1 15 SCLOUT1 XORL2 2 14 READYn ....................................................... 0.3V to 6V 21 XORH1 3 13 SDAOUT1 Output Currents GND XORL1 4 12 SDAIN1 READYn, SDAOUTn ................................................50mA V 5 11 SDAIN2 CC Input/Output Voltages 6 7 8 9 10 SCLINn, SCLOUTn, SDAINn, SDAOUTn ........ 0.3V to 6V Operating Temperature Range LTC4318C ................................................ 0C to 70C LTC4318I .............................................40C to 85C UF PACKAGE 20-LEAD (4mm 4mm) PLASTIC QFN Storage Temperature Range .................. 65C to 150C T = 150C, = 37C/W JMAX JA EXPOSED PAD (PIN 21) IS GND, PCB CONNECTION OPTIONAL o r Der i n F Ma T LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC4318CUF PBF LTC4318CUF TRPBF 4318 20-Lead (4mm 4mm) Plastic QFN 0C to 70C LTC4318IUF PBF LTC4318IUF TRPBF 4318 20-Lead (4mm 4mm) Plastic QFN 40C to 85C Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. For more information on lead free part marking, go to: