CAT705 Datasheet (data sheet) PDF





CAT705 Datasheet, (CATxxx) Supervisory Circuits

CAT705   CAT705  

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CAT705, CAT706, CAT813 µP Supervisory Circuits FEATURES „ Accurate under vol tage system monitoring ¯¯¯¯¯¯ gua ranteed valid for VCC = 1.0V „ RESET 6µA supply current www.DataSheet4U.c om „ 200ms DESCRIPTION The CAT705, CA T706, and CAT813 provide reset and moni toring functions for the electronic sys tems. Each device monitors the system v oltage and maintains a reset output unt il that voltage reaches the device’s specified trip value and then maintains the reset output active condition unti l the device’s internal timer allows the system power supply to stabilize. T he CAT705, CAT706, and CAT813 have a wa tchdog input which can be used to monitor

CAT705 Datasheet, (CATxxx) Supervisory Circuits

CAT705   CAT705  
a system signal and cause a reset to be issued if the signal fails to change s tate prior to a timeout condition. ¯¯ ¯¯¯¯ The CAT705 and CAT706 provide a manual RESET input which initiate res et if pulled low. The CAT705, CAT706 an d CAT813 provide a RESET output which i s low for the CAT705 and CAT706, but hi gh for the CAT813. There is a secondary supply monitor included for power-fail warning (pin PFI). The CAT706 has a th reshold voltage 4.40V. The CAT705/ CAT8 13 have a threshold voltage of 4.65V. F or Ordering Information details, see pa ge 13. RESET pulse width „ Watchdog timer function 1.6 sec timeout „ Brown out detection system reset for use with 3.0, 3.6, and 5.0 volt systems „ Pin and function compatible with the MAX705 /706/813L products „ Operating Range f rom -40°C to +85°C „ Available in SO IC 8-lead and MSOP 8-lead packages APP LICATIONS „ Microprocessor and microco ntroller based systems „ Intelligent i nstruments „ Control systems „ Critic al µP monitors „ Portable equipment PIN CONFIGURATION SOIC 8-Lead MR VCC GN D PFI 1 2 3 4 8 7 6 5 WDO RESET (RESET for CAT813) PIN FUNCTIONS Pin Name ¯ ¯ MR VCC GND PFI ¯¯¯¯ PFO WDI WDI PFO PFI Function Manual Reset input P ower Supply Ground Power Fail voltage m onitor Input. Power Fail Output Watchdog Timer Input CMOS Push-Pull Active Lo








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