The document introduces the features and characteristics of the IMP811/IMP812 low-power power supply monitors, including the power supply voltage range, monitored power supply voltage, reset signal, reset pulse width, reset input, etc.
The IMP811 and IMP812 are low-power voltage supervisors designed to monitor power supply levels in microprocessor and microcontroller systems. They serve as improved drop-in replacements for the Maxim MAX811/812, featuring extended temperature specifications up to 105°C and a compact 4-pin SOT-143 package.
These devices issue a reset signal if the power supply voltage drops below a preset threshold, asserting the reset for at least 140ms after the supply rises above the threshold. The IMP811 features an active-low output, while the IMP812 has an active-high output. Both include a debounced manual reset input and are immune to fast transients on the supply voltage.
| Operating Temperature Range | -40°C to 105°C |
|---|---|
| Supply Current (Unloaded) | 6 µA (typical) |
| Reset Timeout Period | 140 ms minimum |
| Package Type | 4-Pin SOT-143 |
| Reset Threshold Options | 2.63V to 4.63V |
The reset signal is asserted for at least 140ms after the supply has risen above the reset threshold.
The devices are specified to operate up to 105°C.
Yes, the MR input has an internal pull-up resistor and can be left open if not used.