CAT823: Voltage Supervisor with Manual Reset and Watchdog

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 140 ms; 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.

Features
  • Automatically Restarts Microprocessor after Power Failure
  • Monitors Pushbutton for Eexternal 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
  • These Devices are Pb-Free, Halogen Free/BFR Free and are RoHS Compliant
Applications
  • Microprocessor and Microcontroller Based Systems
  • Intelligent Instruments
  • Control Systems
  • Critical μP Monitors
  • Portable Equipment
Data Sheets (1)
Document TitleDocument ID/SizeRevisionRevision Date
System Supervisory Voltage Reset with Watchdog and Manual ResetCAT823/D (135.0kB)8
Package Drawings (2)
Document TitleDocument ID/SizeRevision
SC-88A (SC-70 5 Lead), 1.25x2419AC (59.6kB)A
TSOT-23. 5 Lead419AE (54.4kB)revo
Order Information
ProductStatusCompliancePackageMSL*ContainerBudgetary Price/Unit
CAT823LSDI-GT3Last ShipmentsPb-free Halide freeSC-88A-5 / SC-70-5419AC1Tape and Reel3000
CAT823LTDI-GT3Last ShipmentsPb-free Halide freeTSOT-23-5419AE1Tape and Reel3000
CAT823MSDI-GT3Last ShipmentsPb-free Halide freeSC-88A-5 / SC-70-5419AC1Tape and Reel3000
CAT823MTDI-GT3Last ShipmentsPb-free Halide freeTSOT-23-5419AE1Tape and Reel3000
CAT823RSDI-GT3Last ShipmentsPb-free Halide freeSC-88A-5 / SC-70-5419AC1Tape and Reel3000
CAT823RTDI-GT3ActivePb-free Halide freeTSOT-23-5419AE1Tape and Reel3000$0.2933
CAT823SSDI-GT3Last ShipmentsPb-free Halide freeSC-88A-5 / SC-70-5419AC1Tape and Reel3000
CAT823STDI-GT3ActivePb-free Halide freeTSOT-23-5419AE1Tape and Reel3000$0.2933
CAT823TSDI-GT3Last ShipmentsPb-free Halide freeSC-88A-5 / SC-70-5419AC1Tape and Reel3000
CAT823TTDI-GT3ActivePb-free Halide freeTSOT-23-5419AE1Tape and Reel3000$0.2933
CAT823YSDI-GT3Last ShipmentsPb-free Halide freeSC-88A-5 / SC-70-5419AC1Tape and Reel3000
CAT823YTDI-GT3ActivePb-free Halide freeTSOT-23-5419AE1Tape and Reel3000$0.2933
CAT823ZSDI-GT3Last ShipmentsPb-free Halide freeSC-88A-5 / SC-70-5419AC1Tape and Reel3000
CAT823ZTDI-GT3ActivePb-free Halide freeTSOT-23-5419AE1Tape and Reel3000$0.2933
Specifications
ProductVoltages MonitoredVCC Max (V)V(TO) Typ (V)IQ Typ (µA)Reset Active StateReset TimerManual ResetWatchdog Timer
CAT823RTDI-GT315.52.636LowYesYesYes
CAT823STDI-GT315.52.936LowYesYesYes
CAT823TTDI-GT315.53.086LowYesYesYes
CAT823YTDI-GT315.52.196LowYesYesYes
CAT823ZTDI-GT315.52.326LowYesYesYes
System Supervisory Voltage Reset with Watchdog and Manual Reset (135.0kB) CAT823
SC-88A (SC-70 5 Lead), 1.25x2 CAT824
TSOT-23. 5 Lead CAT24C16