Maxim Integrated MAX809SEUR T

Description
The MAX803/MAX809/MAX810 are microprocessor (µP) supervisory circuits that monitor power supplies in µP and digital systems. They provide reliability and cost-effectiveness by eliminating external components and adjustments when used with 5V, 3.3V, 3.0V, or 2.5V powered circuits.
These circuits assert a reset signal when the Vcc supply voltage falls below a preset threshold, keeping it asserted for at least 140ms after Vcc has risen above the reset threshold. Reset thresholds are available for various supply voltages.
The MAX803 has an open-drain output stage, while the MAX809/MAX810 have push-pull outputs. The MAX803's open-drain RESET output requires a pullup resistor that can be connected to a voltage higher than Vcc. The MAX803/MAX809 have an active-low RESET output, while the MAX810 has an active-high RESET output. The reset comparator ignores fast transients on Vcc, and the outputs are guaranteed to be in the correct logic state for Vcc down to 1V.

Features
Precision monitoring of 2.5V, 3V, 3.3V, and 5V power-supply voltages
Fully specified over temperature
Available in three output configurations:
Open-drain RESET output (MAX803)
Push-pull RESET output (MAX809)
Push-pull RESET output (MAX810)
140ms (min) power-on-reset pulse width
12µA supply current
Guaranteed reset valid to Vcc = 1V
Power supply transient immunity
No external components
3-pin SC70 and SOT23 packages

Applications
Computers
Controllers
Intelligent instruments
Critical µP and µC power monitoring
Portable/battery-powered equipment
Automotive