CAT705 Datasheet | Catalyst Semiconductor

CAT705, CAT706, CAT813 µP Supervisory Circuits Features - Accurate under voltage system monitoring ¯¯¯¯¯¯ guaranteed valid for VCC = 1.0V - RESET - 6µA supply current .. - 200ms DESCRIPTION The CAT705, CAT706, and CAT813 provide reset and monitoring functions for the electronic systems. Each device monitors the system voltage and maintains a reset output until that voltage reaches the device’s specified trip value and then maintains the reset output active condition until the device’s internal timer allows the system power supply to stabilize. The CAT705, CAT706, and CAT813 have a watchdog input which can be used to monitor a system signal and cause a reset to be issued if the signal fails to change state prior to a timeout condition. ¯¯¯¯¯¯ The CAT705 and CAT706 provide a manual RESET input which initiate reset if pulled low. The CAT705, CAT706 and CAT813 provide a RESET output which is low for the CAT705 and CAT706, but high for the CAT813. There is a secondary supply monitor included for power-fail warning (pin PFI). The CAT706 has a threshold voltage 4.40V. The CAT705/ CAT813 have a threshold voltage of 4.65V. For Ordering Information details, see page 13. RESET pulse width - Watchdog timer function 1.6 sec timeout - Brownout detection system reset for use with 3.0, 3.6, and 5.0 volt systems - Pin and function patible with the MAX705/706/813L products - Operating Range from -40°C to +85°C - Available in SOIC 8-lead and MSOP 8-lead packages APPLICATIONS - Microprocessor and microcontroller based systems - Intelligent instruments - Control systems - Critical µP monitors - Portable equipment PIN CONFIGURATION SOIC 8-Lead MR VCC GND 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 Power Supply Ground Power Fail voltage monitor Input. Power Fail Output Watchdog Timer Input CMOS Push-Pull Active Low Reset Output (CAT705 & CAT706) CMOS Push-Pull...