DESCRIPTION

The DS1832 3.3-Volt MicroMonitor monitors three vital conditions for a microprocessor: power supply, software execution, and external override. First, a precision temperature-compensated reference and comparator circuit monitor the status of VCC. When an out-of-tolerance condition occurs, an internal power-fail signal is generated which forces the resets to an active state. When VCC returns to an in-tolerance condition, the reset signals are kept in the active state for a minimum of 250 ms to allow the power supply and processor to stabilize.

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