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MAX6866UK23D3S Datasheet(PDF) 8 Page - Maxim Integrated Products |
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MAX6866UK23D3S Datasheet(HTML) 8 Page - Maxim Integrated Products |
8 / 17 page Nanopower µP Supervisory Circuits with Manual Reset and Watchdog Timer 8 _______________________________________________________________________________________ MAX6864/MAX6865/MAX6866 Pin Description PIN MAX6864/ MAX6866 MAX6865 NAME FUNCTION 1— RESET Active-Low Open-Drain or Push-Pull Reset Output. RESET transitions from high to low when VCC drops below the selected reset threshold, MR is pulled low, or the watchdog timer expires. RESET remains low for the reset timeout period after VCC exceeds the device reset threshold, MR deasserts, or after the watchog timer expires. Push-pull RESET outputs are referenced to VCC. Open-drain RESET outputs require an external pullup resistor. 22 GND Ground 33 MR Active-Low Manual Reset Input. Drive MR low to initiate a reset. The reset output remains asserted while MR is held low and for the reset timeout period after MR transitions high. Leave MR unconnected or connect to VCC if unused. MR is internally pulled up to VCC through 10k Ω. 44 WDI Watchdog Input. If WDI remains high or low for longer than the watchdog timeout period, the internal watchdog timer expires, and a reset is triggered for the reset timeout period. The internal watchdog timer clears whenever reset is asserted, the manual reset is asserted, or WDI sees a rising or falling edge. 55 VCC Supply Voltage. Input for VCC reset monitor. For noisy systems, bypass VCC with a 0.1µF capacitor to GND. —1 RESET Active-High Push-Pull Reset Output. RESET transitions from low to high when VCC drops below the selected reset threshold, MR is pulled low, or the watchdog timer expires. RESET remains high for the reset timeout period after VCC exceeds the device reset threshold, MR deasserts, or after the watchdog timer expires. RESET is referenced to VCC. |
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