CAT872 Series

Dual Input Reset Generator

Catalog

Dual Input Reset Generator

Part	Operating Temperature [Max]	Operating Temperature [Min]	Mounting Type	Output	Type	Reset	Reset Timeout	Number of Voltages Monitored	Voltage - Threshold	Package / Case	Supplier Device Package
ON Semiconductor CAT872-50ULGT3	85 °C	-40 °C	Surface Mount	Open Drain or Open Collector	Multi-Voltage Supervisor	Active Low	5 s	2	Adjustable/Selectable	6-XFLGA	6-ULLGA (1.45x1)
ON Semiconductor CAT872-30ULGT3	85 °C	-40 °C	Surface Mount	Open Drain or Open Collector	Multi-Voltage Supervisor	Active Low	3 s	2	Adjustable/Selectable	6-XFLGA	6-ULLGA (1.45x1)

Catalog

Dual Input Reset Generator

Key Features

• Operate on 1.65 V to 5.5 V Power Supplies

• Ultra Low Quiescent Current: 10 nA (typical)

• Schmitt Trigger Inputs

• 8 Factory Preset Delay Times from 0.5 s to 5 s to Choose From

• Small µLLGA-6 Package: 1.45 x 1.0 x 0.4 mm

• These Devices are Pb-Free, Halogen Free/BFR Free and are RoHS Compliant

Description

CAT871, CAT872 are dual input reset generators designed to restart microprocessor and microcontroller based systems when the watchdog timer or other resetting mechanisms have become disabled or failed.CAT871, CAT872 monitor two inputs and output an active low reset pulse after both inputs have been active (logic low) for a factory preset minimum time. The reset pulse width is 2.2 ms for CAT871 and 70 ms for CAT872. Releasing either input from its active state before the minimum timeout period resets the internal timer and both inputs must return to being active before the timer will restart with a fresh count down.CAT871, CAT872's open drain output is capable of sinking up to 3 mA of current and may be wire-OR'd with other open drain devices to drive a common reset input.