Ind Product ust Brief ry’s Op INTEGRATED CIRCUITS DIVISION tica 2 lly First IC Co Bu s R uple epe d Optically Coupled I C Bus Repeater ate Provides 3750V Galvanic Isolation r CPC5902 2 rms Features: • • • • • • • • Robust: • Immune to External EMI and RFI • High Voltage Isolation - Tested Above 6kVpk for Adverse Environments Low EM and RF Generation - No Internal Clock Bidirectionally Buffers Both I2C Signals Extends and Isolates I2C Interfaces Supports Standard and Fast-mode I2C (400kbps) Supports Direct Static-State Buffering Without Refresh Operates on 2.7V to 5.5V Glitch-Free Operation Translates Voltage Levels Example Applications: • • • • Power Over Ethernet I2C Bus Length Extender Isolated Signal Monitoring and Control Power Supply High-Side Interface Technical Brief, TB-101 “Optically Isolating an I2C Interface,” Available CPC5902 Functional Block Diagram 3750Vrms Optical Isolation VDDA IOA1 VDDB 1 A VDDA GNDA VDDB VDDB B D Q CLR VDDB LED 2 A LED VDDB 8 7 IOB1 6 GNDB B A VDDA IOA2 3 A VDDA VDDA 4 VDDA LED VDDB VDDB B B D Q CLR VDDB 5 LED IOB2 • UL 1577 Certified Component: File E76270 • EN/IEC 60950 Certified Component: TUV Certificate: B 11 10 49410 007 B A CPC5902 Ordering Information Part CPC5902G CPC5902GS CPC5902GSTR Description 8-Pin DIP in Tubes (50 / Tube) 8-Pin Surface Mount in Tubes (50 / Tube) 8-Pin Surface Mount, Tape & Reel (1000 / Reel) IXYS IC Division Product Brief: PB-CPC5902/November 19, 2012 CPC5902 Optically Coupled Bus Repeater: I2C Bus Application Optical Isolation Barrier VDDA VDDA VDDA VDDB VDDB VDDB SCL_A SCL_B CPC5902 SDA_A I2C Master I2C Slave GNDA SDA_B GNDB I2C Master I2C Slave • • • • • • • • • Replaces Multiple Logic Optoisolators 3750Vrms Galvanic Isolation Multiple Masters and Slaves on Same Bus I2C Fast-mode Operation up to 400kbps Bidirectionally Buffers Two I2C Signals Supports I2C Clock Stretching Internal Glitch Suppression Circuitry Supports Bus Level Translation: 2.7V to 5.5V Passes DC Signals - No Refresh Needed CPC5902 Optically Coupled Bus Repeater: Power-over-Ethernet (PoE) Application • • • • • • Provides Communications Interface Between Host Controller and PSE Controller Provides 3750Vrms Galvanic Isolation Between Host Controller and PSE Controller Protects Host Controller During Power Supply Surge Tests Bidirectionally Buffers Clock and Data Signals Between Host Controller and PSE Controller Simplifies Bus Design by Replacing Multiple Logic Optoisolators Provides any Necessary Bus Level Translation Between Host Controller and PSE Controller VDDA VDDA VDDB VDDB CPC5902 Serial Data GNDA I2C Interface Serial Clock B SDA A SCL B A Side A Side B Optical Isolation Barrier (3750Vrms) Serial Data I2C Interface GNDB VDDA Host Controller RJ45 VDDB SDA SCL Serial Clock Power Supply Equipment Controller (PSE) Powered Devices For additional information, contact your IXYS IC Division Representative: http://www.ixysic.com/home/pages.nsf/locate.rep Or visit IXYS IC Division’s web site: http://www.ixysic.com Pb e3 IXYS IC Division Product Brief: PB-CPC5902/November 19, 2012