The MAX803/NCP803 is a cost−effective system supervisor circuit designed to monitor VCC in digital systems and provide a reset signal to the host processor when necessary. No external components are required.

The MAX803/NCP803 is optimized to reject fast transient glitches on the VCC line. Low supply current of 0.5 μA (VCC = 3.2 V) make these devices suitable for battery powered applications.

Features

• Precision VCC Monitor for 1.5 V, 1.8 V, 2.5 V, 3.0 V, 3.3 V, and 5.0 V Supplies

• Precision Monitoring Voltages from 1.2 V to 4.9 V Available in 100 mV Steps

• Four Guaranteed Minimum Power−On Reset Pulse Width Available (1 ms, 20 ms, 100 ms, and 140 ms)

• RESET Output Guaranteed to VCC = 1.0 V

• Low Supply Current

• VCC Transient Immunity

• No External Components

• Wide Operating Temperature: −40°C to 105°C

• Pb−Free Packages are Available

Typical Applications

• Computers

• Embedded Systems

• Battery Powered Equipment

• Critical Microprocessor Power Supply Monitoring