ADuM2251 Datasheet

• 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
• 16-lead SOIC wide body package version (RW-16)
• High temperature operation: 105°C
• 16-lead SOIC wide body enhanced creepage version (RI-16-2)
• Safety and regulatory approvals
• UL recognition: 5000 V rms for 1 minute per UL 1577
• 5000 V rms for 1 minute per UL 1577
• CSA Component Acceptance Notice 5A (RI-16-2 package)

• Isolated I²C, SMbus, or PMBus Interfaces
• Multilevel I²C interfaces
• Power supplies
• Networking
• Power over Ethernet

The ADuM2251 are hot swappable digital isolators with non-latching, bidirectional communication channels and are compatible with I²C interfaces. This eliminates the need for splitting I²C signals into separate transmit and receive signals for use with stand-alone optocouplers.

The ADuM2251 provides one bidirectional channel and one unidirectional channel for those applications where a bidirectional clock is not required.

The ADuM2251 contain hot swap circuitry to prevent data glitches when an unpowered card is inserted onto an active bus.

These isolators are based on iCoupler^® chip scale transformer technology from Analog Devices, Inc. iCoupler is a magnetic isolation technology with functional, performance, size, and power consumption advantages compared to optocouplers. The ADuM2251 integrate iCoupler channels with semiconductor circuitry to enable a complete, isolated I²C interface provided in a small form factor.