STM1812MWX7F
ActiveSUPERVISORY CIRCUITS 4.37VRST ACTIVE HIGH PUSH-PULL RESET
STM1812MWX7F
ActiveSUPERVISORY CIRCUITS 4.37VRST ACTIVE HIGH PUSH-PULL RESET
Technical Specifications
Parameters and characteristics for this part
| Specification | STM1812MWX7F |
|---|---|
| Mounting Type | Surface Mount |
| Number of Voltages Monitored | 1 |
| Operating Temperature [Max] | 105 °C |
| Operating Temperature [Min] | -40 °C |
| Output | Push-Pull, Totem Pole |
| Package / Case | SOT-23-3, TO-236-3, SC-59 |
| Reset | Active High |
| Reset Timeout | 100 ms |
| Supplier Device Package | SOT-23-3 |
| Type | Simple Reset/Power-On Reset |
| Voltage - Threshold | 4.37 V |
| Part | Supplier Device Package | Number of Voltages Monitored | Operating Temperature [Min] | Operating Temperature [Max] | Reset | Voltage - Threshold | Output | Type | Package / Case | Reset Timeout | Mounting Type |
|---|---|---|---|---|---|---|---|---|---|---|---|
STMicroelectronics | SOT-23-3 | 1 | -40 °C | 105 °C | Active High | 4.37 V | Push-Pull Totem Pole | Simple Reset/Power-On Reset | SC-59 SOT-23-3 TO-236-3 | 100 ms | Surface Mount |
 STMicroelectronics | SOT-23-3 | 1 | -40 °C | 105 °C | Active High | 4.62 V | Push-Pull Totem Pole | Simple Reset/Power-On Reset | SC-59 SOT-23-3 TO-236-3 | 100 ms | Surface Mount |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
Description
General part information
STM1812 Series
STM181x devices are low power reset devices used to monitor power supplies for microcontrollers. They perform a single function: asserting a reset signal whenever VCCsupply voltage drops below a preset value and keeping it asserted until VCChas 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.
A precision voltage reference and comparator monitors the VCCinput for an out-of-tolerance condition. When an invalid VCCcondition occurs, the reset output (RST) is forced low (or high in the case of RST) and remains asserted for trecafter VCCrises above the reset threshold. The STM1813/1818 also keep reset asserted for trecafter the output is momentarily pulled to ground by an external push-button switch.
The STM1812 and STM1817 have an active-high, push-pull output. The STM1810 and STM1815 (push-pull) and STM1811, STM1813, STM1816, and STM1818 (open-drain) have an active-lowRSToutput. The open-drain devices (STM1811 / STM1813 / STM1816 / STM1818) also have an internal pull-up resistor to VCC. The STM1813 and STM1818 feature a debounced manual reset feature that asserts a reset if theRSTpin is pulled low for more than 1.5 μs. When used to initiate manual reset,RSTdebounces signals from devices such as mechanical switches. For devices with this feature, the release of the external switch triggers the reset period.
Documents
Technical documentation and resources