Description STM181x devices are low power reset devices used to monitor power supplies for microcontrollers. They perform a single function: asserting a reset signal whenever VCC supply voltage drops below a preset value and keeping it asserted until VCC has risen above the preset threshold for a minimum period of time (trec). They provide excellent circuit reliability without additional external components when used with +3.0 V / +3.3 V (STM1815–STM1818), and +5 V (STM1810–STM1813) power supply systems. Features ● Precision monitoring of 3 V , 3.3 V, and 5 V supply voltages ● Four output configurations: – Push-Pull, Active-High (STM1812,1817) – Push-Pull, Active-Low (STM1810,1815) – Open Drain, Active-Low (STM1811,1816) – Open Drain, Active-Low with PushButton Detect (STM1813,1818) ● Reset pulse width - 100 ms (min) ● Low supply current - 4 µA (typ) ● Guaranteed assertion down to VCC = 1.0 V (0 °C to 105 °C) ● Factory-trimmed reset thresholds of 2.55 V, 2.88 V, 3.06 V, 4.37 V, and 4.62 V (typ) ● Power supply transient immunity ● Push-button/manual reset detect (STM1813/1818) ● Operating temperature: –40 °C to 105 °C ● ± 2.5 % reset threshold accuracy: (–40 °C to 105 °C) ● Available in the SOT23-3 package ● Fully compatible with DS181x and MXD181x products.
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