ADUM1251

Data Sheet Hot Swappable, Dual I2C Isolators ADuM1250/ADuM1251 FEATURES Bidirectional I2C communication Open-drain interfaces Suitable for hot swap applications 30 mA current sink capability 1000 kHz operation 3.0 V to 5.5 V supply/logic levels 8-lead, RoHS compliant SOIC package High temperature operation: 125°C Qualified for automotive applications Safety and regulatory approvals UL recognition 2500 V rms for 1 minute per UL 1577 CSA Component Acceptance Notice 5A VDE certificate of conformity DIN V VDE V 0884-10 (VDE V 0884-10):2006-12 VIORM = 560 V peak APPLICATIONS Isolated I2C, SMBus, or PMBus interfaces Multilevel I2C interfaces Power supplies Networking Power over Ethernet Hybrid electric vehicle battery management GENERAL DESCRIPTION The ADuM1250/ADuM12511 are hot swappable digital isolators with nonlatching, bidirectional communication channels that are compatible with I2C interfaces. This eliminates the need for splitting I2C signals into separate transmit and receive signals for use with standalone optocouplers. The ADuM1250 provides two bidirectional channels, supporting a complete isolated I2C interface. The ADuM1251 provides one bidirectional channel and one unidirectional channel for applications where a bidirectional clock is not required. 06113-001 FUNCTIONAL BLOCK DIAGRAMS VDD1 1 SDA1 2 SCL1 3 GND1 4 DECODE ENCODE ENCODE DECODE DECODE ENCODE ENCODE DECODE Figure 1. ADuM1250 8 VDD2 7 SDA2 6 SCL2 5 GND2 VDD1 1 SDA1 2 SCL1 3 GND1 4 DECODE ENCO...