4.25 V to 4.5 V, mP power supply supervisor with battery backup swith 4.25 V to 4.50 V, mP power supply supervisor with battery backup swith 4.5 V to 4.75 V, mP power supply supervisor with battery backup swith UP Power Supply Supervisor With battery Backup Switch 2-CHANNEL POWER SUPPLY management CKT, PDSO8 UP Power Supply Supervisor With battery Backup Switch 2-CHANNEL POWER SUPPLY management CKT, PDIP8