PRODUCT DESCRIPTION
California Micro Devices’ SmartOR™ CMPWR025 is a dual input power switch that selects between two different power inputs and delivers it to one output. The device integrates two very low impedance power switches and automatically implements an OR function that selects the higher of the two inputs. A hysteresis is built in (and is user selectable) to prevent switch chatter.

FEATURES
• Automatically selects VCC1 OR VCC2 input source
• Integrated low impedance switches (0.2Ω TYP)
• Operating supply range from 2.8V to 5.5V
• Glitch-free output during supply switching transitions
• Low operating supply current of 20µA (TYP)
• User-selectable hysteresis for supply selection
• 8-pin SOIC Narrow or 8-pin MSOP packages

APPLICATIONS
• PCI cards for Wake-On-LAN/Wake-On-Ring
• Dual power systems
• Systems with standby capabilities
• Battery backup systems
• See Application Note AP211