DESCRIPTION

The DS1818 EconoReset uses a precision temperature-compensated reference and comparator circuit to

monitor the status of the power supply (VCC). When an out-of-tolerance condition is detected, an internal power-fail signal is generated which forces reset to the active state. When VCC returns to an in-tolerance condition, the reset signal is kept in the active state for approximately 150 ms to allow the power supply and processor to stabilize.

FEATURES

● Automatically restarts a microprocessor after power failure

● Monitors pushbutton for external override

● Maintains reset for 150 ms after VCC returns to an in-tolerance condition

● Reduces need for discrete components

● Precision temperature-compensated voltage reference and voltage sensor

● Accurate 5%, 10% or 20% power monitoring

● Low-cost TO-92 or space saving surface mount SOT-23 packages available

● Efficient open-drain output with internal 5.5 kΩ=pull-up resistor

● Operating temperature -40°C to +85°C