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CAT824MTDI-G Datasheet(PDF) 1 Page - Catalyst Semiconductor |
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CAT824MTDI-G Datasheet(HTML) 1 Page - Catalyst Semiconductor |
1 / 14 page CAT823, CAT824, CAT825 © Catalyst Semiconductor, Inc. 1 Doc. No. MD-3027, Rev. B Characteristics subject to change without notice System Supervisory Voltage Reset with Watchdog and Manual Reset FEATURES Automatically restarts microprocessor after Power failure Monitors pushbutton for external override Accurate under voltage system monitoring Brownout detection system reset for use with 3.0, 3.3, and 5.0 volt systems Pin and function compatible with the MAX823/24/25 products Operating Range from -40°C to +85°C Available in TSOT-23 5-lead and SC-70 packages For Ordering Information details, see page 13. APPLICATIONS Microprocessor and Microcontroller based systems Intelligent Instruments Control Systems Critical µP Monitors Portable Equipment DESCRIPTION The CAT823, CAT824, and CAT825 provide basic 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, after a minimum timer of 140ms; to allow the systems power supply to stabilize. The CAT823 and CAT824 also 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 CAT823 and CAT825 also provide a manual reset input which can be used to initiate reset if pulled low. This input can be directly attached to a push- button or a processor signal. PIN CONFIGURATION TSOT-23 5-Lead SC-70 5-Lead PIN FUNCTIONS Pin Name Function RESET ¯¯¯¯¯¯ CMOS Push-Pull Active Low Reset Output GND Ground MR ¯¯¯ Manual Reset input – Pulled high Internally by a 52kΩ resistor designed to be driven low by a mechanical pushbutton, open drain output or CMOS output. RESET CMOS Push-Pull Active High Reset Output WDI Watchdog Timer Input – Designed to be driven by a processor output or can be disabled by tri-stating or leaving open. VCC Power Supply VCC CAT823 MR 2 3 1 WDI 5 4 RESET GND RESET MR VCC CAT824 RESET 2 3 1 WDI 5 4 RESET GND VCC CAT825 RESET 2 3 15 4 GND |
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Similar Description - CAT824MTDI-G |
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