Maxim Integrated DS1832S T&R

Description
The DS1832 is a 3.3-volt MicroMonitor chip that monitors three vital conditions for a microprocessor: power supply, software execution, and external override.
Monitors Vcc status using a precision temperature-compensated reference and comparator circuit.
Generates an internal power-fail signal when an out-of-tolerance condition occurs, forcing resets to an active state.
Keeps reset signals active for a minimum of 250ms when Vcc returns to an in-tolerance condition to allow power supply and processor stabilization.

Features
Halts and restarts an out-of-control microprocessor
Holds microprocessor in check during power transients
Automatically restarts microprocessor after power failure
Monitors pushbutton for external override
Accurate 10% or 20% microprocessor power monitoring
Eliminates need for discrete components
20% tolerance for use with 3.0-volt systems
Pin-compatible with the DS1232
Low cost 8-pin DIP, 8-pin SOIC, and space-saving μ-SOP packages available
Industrial temperature range of -40°C to 85°C

Applications
Microprocessor power supply monitoring
Software execution monitoring
External override for microprocessor reset
Power-fail detection and recovery