CAT872: Dual Input Reset Generator

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.

Features
  • 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
  • Operate on 1.65 V to 5.5 V Power Supplies
  • 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
Benefits
  • Low Power Consumption
  • Low Sensitivity to Noise
  • Flexibility
End Products
  • Mobile Phones
  • PDAs
  • MP3 Players
  • Personal Navigation Devices
Data Sheets (1)
Document TitleDocument ID/SizeRevisionRevision Date
Dual Input Reset GeneratorCAT871/D (219.0kB)0
Package Drawings (1)
Document TitleDocument ID/SizeRevision
ULLGA6 1.45x1.0, 0.50P613AF (41.2kB)A
Order Information
ProductStatusCompliancePackageMSL*ContainerBudgetary Price/Unit
CAT872-05ULGT3ObsoletePb-free Halide freeULLGA-6613AF1Tape and Reel3000
CAT872-10ULGT3ObsoletePb-free Halide freeULLGA-6613AF1Tape and Reel3000
CAT872-15ULGT3ObsoletePb-free Halide freeULLGA-6613AF1Tape and Reel3000
CAT872-20ULGT3ObsoletePb-free Halide freeULLGA-6613AF1Tape and Reel3000
CAT872-25ULGT3ObsoletePb-free Halide freeULLGA-6613AF1Tape and Reel3000
CAT872-30ULGT3ActivePb-free Halide freeULLGA-6613AF1Tape and Reel3000$0.216
CAT872-40ULGT3ObsoletePb-free Halide freeULLGA-6613AF1Tape and Reel3000
CAT872-50ULGT3ActivePb-free Halide freeULLGA-6613AF1Tape and Reel3000$0.216
Specifications
ProductVoltages MonitoredVCC Max (V)V(TO) Typ (V)IQ Typ (µA)Reset Active StateReset TimerManual ResetWatchdog Timer
CAT872-30ULGT305.5-0.05LowYesYesNo
CAT872-50ULGT305.5-0.05LowYesYesNo
Dual Input Reset Generator (219.0kB) CAT872
ULLGA6 1.45x1.0, 0.50P NLAS3157