LTC4310-1/LTC4310-2 Hot-Swappable 2 I C Isolators Fea T Descrip T 2 2 n Bidirectional I C Communication Between Two The LTC 4310 provides bidirectional I C communications 2 Isolated Buses between two I C buses whose grounds are isolated from 2 n Full Isolation with Inexpensive Ethernet one another. Each LTC4310 encodes I C bus logic states Transformers or Capacitors into signals that are transmitted across an isolation barrier n Low Voltage Level Shifting to another LTC4310. The receiving LTC4310 decodes the 2 2 n I C Maximum Operating Frequency: transmission and drives its l C bus to the appropriate logic 100kHz for LTC4310-1 state. The isolation barrier can be bridged by an inexpensive 400kHz for LTC4310-2 Ethernet, or other transformer, to achieve communications 2 n I C Specification Compliant V , V across voltage differences reaching thousands of volts, or OL IL n 5kV Human Body Model ESD Protection it can be bridged by capacitors for lower voltage isolation. 2 n Rise Time Accelerators The LTC4310-1 is intended for use in 100kHz I C systems. 2 n SDA, SCL Hot-Swapping The LTC4310-2 is intended for 400kHz I C systems. n Very Low Shutdown Current Rise time accelerators provide strong pull-up currents on n Stuck Bus Disconnect and Recovery SCL and SDA rising edges to meet rise time specifications n Thermal Shutdown for heavily loaded systems. Data and clock Hot Swap n 10-Lead MSOP and 3mm 3mm DFN Packages circuitry prevent data corruption when a card is inserted into or removed from a live bus. When a bus is stuck low a T for 37ms, the LTC4310 turns off its pull-down devices 2 n Isolated I C, SMBus and PMBus Interfaces and generates up to sixteen clocks and a STOP bit in an n Isolated Power Supplies attempt to free the bus. Driving EN low sets the LTC4310 n Positive-to-Negative Rail Communications in a very low current shutdown mode to conserve power. n Power-over-Ethernet L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. Hot Swap is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. Typical a T 2 1500V Isolated I C System LTC4310 Operating Through 20kV/s Common Mode Transient 10/100Base-TX ISOLATED 3.3V ETHERNET TRANSFORMER 5V 0.01F 0.01F V TXP RXP V CC CC SCL 0V 2V/DIV 3.3k 3.3k 3.3k 3.3k 0.01F SDA LTC4310-1 LTC4310-1 SDA1 SDA TXN RXN SDA SDA2 500V/ SCL1 SCL2 DIV SCL RXP TXP SCL 20kV/s 0V EN EN 431012 TA01b READY 0.01F READY 2s/DIV GND RXN TXN GND 431012 TA01a EPF8119S 431012fa 1 ion pplica ions pplica ion uresLTC4310-1/LTC4310-2 a Te Maxi Mu M r a T (Notes 1, 4) Input Supply Voltage (V ) .......................... 0.3V to 6V Operating Ambient Temperature Range CC Input and Bidirectional Pin Voltages LTC4310C ................................................ 0C to 70C SCL, SDA, EN, RXP, RXN .......................... 0.3V to 6V LTC4310I.............................................. 40C to 85C Output Voltages Storage Temperature Range READY ..................................................... 0.3V to 6V DD ..................................................... 65C to 125C TXP, TXN ...................... 0.3V to V + 0.3V (6V Max) MS ..................................................... 65C to 150C CC Maximum Sink Current (SDA, SCL, READY) ..........30mA Lead Temperature (Soldering, 10 sec) MS Package ...................................................... 300C p in c F T TOP VIEW TOP VIEW EN 1 10 RXN EN 1 10 RXN SDA 2 9 RXP 11 SDA 2 9 RXP SCL 3 8 V CC GND SCL 3 8 V CC READY 4 7 TXP READY 4 7 TXP GND 5 6 TXN GND 5 6 TXN MS PACKAGE 10-LEAD PLASTIC MSOP DD PACKAGE 10-LEAD (3mm 3mm) PLASTIC DFN T = 150C, = 120C/W JMAX JA T = 125C, = 43C/W JMAX JA EXPOSED PAD (PIN 11) PCB CONNECTION TO GROUND IS OPTIONAL Der in F Ma T LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC4310CDD-1 PBF LTC4310CDD-1 TRPBF LFCH 10-Lead (3mm 3mm) Plastic DFN 0C to 70C LTC4310IDD-1 PBF LTC4310IDD-1 TRPBF LFCH 10-Lead (3mm 3mm) Plastic DFN 40C to 85C LTC4310CMS-1 PBF LTC4310CMS-1 TRPBF LTFCG 10-Lead Plastic MSOP 0C to 70C LTC4310IMS-1 PBF LTC4310IMS-1 TRPBF LTFCG 10-Lead Plastic MSOP 40C to 85C LTC4310CDD-2 PBF LTC4310CDD-2 TRPBF LFCK 10-Lead (3mm 3mm) Plastic DFN 0C to 70C LTC4310IDD-2 PBF LTC4310IDD-2 TRPBF LFCK 10-Lead (3mm 3mm) Plastic DFN 40C to 85C LTC4310CMS-2 PBF LTC4310CMS-2 TRPBF LTFCJ 10-Lead Plastic MSOP 0C to 70C LTC4310IMS-2 PBF LTC4310IMS-2 TRPBF LTFCJ 10-Lead Plastic MSOP 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: