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2022-09-24 23:33:15
FM811-Microprocessor reset circuit
The FM811/FM812 is a low-cost microprocessor supervisory circuit that asserts if the power supply falls below a reset-specified threshold or the manual reset pin is pulled low. Several different reset thresholds are available to accommodate systems operating at 3V, 3.3V or 5V. The FM811 has an active-low reset output, while the FM812 provides an active-high reset output. The reset output is guaranteed to continue to assert for a minimum of 140ms after VCC has risen above the specified reset threshold. The FM811/FM812 are in a 4-pin SOT-143.
Features • Functions • Precision 3V, 3.3V or 5V supply voltage monitor • 6µA supply current • 140ms minimum reset pulse width • Reset validity remains low with VCC 1.4V • Active low manual reset input • No external components • 4 leads pin SOT-143 package
Applications • Critical microprocessor power monitoring • Portable devices • Smart meters • Computers and printers • Controllers