FEATURES
Selectable reset voltage tolerance — CAT1232LP for 5 V supply — CAT1832 for 3.3 V supply Selectable watchdog period: 150 ms, 600 ms or 1.2 s Two reset outputs — Active high, push-pull reset output — Active low, open-drain reset output (CAT1232LP) — Active low, push-pull reset output (CAT1832) Debounced manual push-button reset Compact SOIC and MSOP packages For Ordering Information details, see page 11. APPLICATIONS
Microprocessor Systems Portable Equipment Controllers Single Board Computers Instrumentations Telecommunications FUNCTIONAL DIAGRAM VCC TOL PBRST TD ST VCC 40kΩ Tolerance Selection Reference + – Push Button Debounce Watchdog Timebase Selection Watchdog Transition Detector DESCRIPTION
During power-up or when the power supply falls outside selectable tolerance limits, both the RESET and R¯¯E¯S¯E¯T¯ become active. After the power supply voltage rises above the RESET threshold voltage, the reset signals remain active for a minimum of 250ms, allowing the power supply and system processor to stabilize.
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