SP703

® SP703/SP704 Low Power Microprocessor Supervisory with Battery Switch-Over s Precision Voltage Monitor: SP703 at 4.65V SP704 at 4.40V s Reset Time Delay - 200ms s Debounced TTL/CMOS Compatible Manual - Reset Input s Minimum component count s 60µA Maximum Operating Supply Current s 0.6µA Maximum Battery Backup Current s 0.1µA Maximum Battery Standby Current s Power Switching 250mA Output in VCC Mode (0.6Ω) 25mA Output in Battery Mode (5Ω) s Voltage Monitor for Power Fail or Low Battery Warning s Available in 8 pin SO and DIP packages s RESET asserted down to VCC = 1V s Pin Compatible Upgrades to MAX703/MAX704 DESCRIPTION The SP703/704 devices are microprocessor (µP) supervisory circuits that integrate a myriad of components involved in discrete solutions to monitor power-supply and battery-control functions in µP and digital systems. The series will significantly improve system reliability and operational efficiency when compared to discrete solutions. The features of the SP703/704 devices include a manual reset input, a µP reset and backup-battery switchover, and powerfailure warning. The series is ideal for applications in computers, controllers, intelligent instruments and automotive systems. All designs where it is critical to monitor the power supply to the µP and its related digital components will find the series to be an ideal solution. VBATT BATTERY SWITCHOVER CIRCUITRY VOUT VOUT VCC GND PFI 1 2 3 4 8 7 6 5 VBATT RESET MR PFO VCC RESET GENERATOR 1.25V RESET ...