IMP812

`Improved Maxim MAX811/MAX812 replacement
- Specified to 105°C
- New 4.0V threshold option
`6µA supply current
`Monitor 5V, 3.3V and 3V supplies
`Manual reset input
`140ms min. reset pulse width
`Guaranteed over temperature
`Active-LOW reset valid with 1.1V supply (IMP811)
`Small 4-pin SOT-143 package
`No external components
`Power-supply transient-immune design

The IMP811/IMP812 are low-power supervisors designed to monitor voltage levels of 3.0V, 3.3V and 5.0V power supplies in low-power microprocessor (µP), microcontroller (µC) and digital systems. Each features a debounced manual reset input. The IMP811/812 are improved drop-in replacements for the Maxim MAX811/812 with extended temperature specifications to 105°C.

A reset signal is issued if the power supply voltage drops below a preset threshold and is asserted for at least 140ms after the supply has risen above the reset threshold. The IMP811 has an active-low output RESET that is guaranteed to be in the correct state for VCC down to 1.1V. The IMP812 has an active-high output RESET. The reset comparator is designed to ignore fast transients on VCC .

Low power consumption makes the IMP811/IMP812 ideal for use in portable and battery-operated equipment. Available in a compact 4-pin SOT143 package, the devices use minimal board space.