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The MAX812LEUS-T is a low-power microprocessor supervisory circuit designed by Maxim Integrated to monitor power supplies in digital systems. It provides a reliable reset signal when the VCC supply voltage falls below a preset threshold, maintaining the reset for at least 140ms after VCC has risen above the threshold. This device features an active-high RESET output and is ideal for critical μP and μC power monitoring applications.
Key electrical characteristics include a typical supply current of 6μA and a minimum power-on reset pulse width of 140ms. It offers precision monitoring for 3V, 3.3V, and 5V power-supply voltages, with available reset threshold voltages including 4.63V (suffix L), 4.38V (suffix M), 3.08V (suffix T), 2.93V (suffix S), and 2.63V (suffix R). The reset comparator is designed to ignore fast transients on VCC.
Packaged in a compact 4-pin SOT-143 surface-mount package, the MAX812LEUS-T is suitable for space-constrained designs. It operates over a temperature range of -40°C to +85°C. This component is designed to increase system robustness and simplify power-supply requirements in portable and battery-powered equipment.
The reset threshold voltage is 4.63V, corresponding to the L suffix.
The typical supply current is 6μA.
The minimum power-on reset pulse width is 140ms.
The operating temperature range is -40°C to +85°C.
It comes in an SOT-143-4 surface-mount package.
It provides an active-high RESET output.