4.13 Sleep Mode

The LAN8670/1/2 provides an ultra-low power (typically less than 140 μW) sleep mode based on the OPEN Alliance TC10 specifications. In this mode, it will release the INH pin to allow shutdown of most external power supplies. Only the uninterrupted supply VDDAU remains active to monitor and react to user selectable wake events. After a wake event, INH is asserted and the remaining power supplies are re-enabled. Since the INH pin can control power supplies shared with other devices, this feature allows for an entire node to enter a low power state, and be awakened by external events.