Overview
The STM1810MWX7F is a low-power reset device manufactured by STMicroelectronics. It is designed to monitor power supplies for microcontrollers and assert a reset signal whenever the VCC supply voltage drops below a preset threshold. This device ensures that the microcontroller starts in a known state, preventing code-execution errors during power-up, power-down, and brownout conditions.
Key Specifications
| Parameter | Description | Value | Unit |
|---|---|---|---|
| Operating Voltage (VCC) | Range | 1.0 to 5.5 | V |
| Supply Current (ICC) | Typical at VCC = 3.6 V, no load | 4 | µA |
| Reset Threshold (VRST) | Typical at 25 °C for STM1810L/M | 4.62 / 4.37 | V |
| Reset Pulse Width (trec) | Minimum | 100 ms | - |
| Output Configuration | Active-low, push-pull | - | - |
| Operating Temperature | Range | –40 to 105 | °C |
| Package | SOT23-3 | - | - |
Key Features
- Precision monitoring of 3 V, 3.3 V, and 5 V supply voltages
- Four output configurations: push-pull active-low, push-pull active-high, open-drain active-low, and open-drain active-low with push-button/manual reset detect
- Low supply current of 4 µA (typical)
- Guaranteed assertion down to VCC = 1.0 V (0 °C to 105 °C)
- Factory-trimmed reset thresholds with ± 2.5% accuracy
- Power supply transient immunity
- Push-button/manual reset detect (for STM1813/1818)
- Available in SOT23-3 package
- Fully compatible with DS181x and MXD181x products
Applications
The STM1810MWX7F is suitable for various applications requiring reliable power supply monitoring, including:
- Microcontroller-based systems
- Embedded systems
- Industrial control systems
- Consumer electronics
- Automotive systems
Q & A
- What is the primary function of the STM1810MWX7F?
The primary function is to monitor the power supply voltage and assert a reset signal to the microcontroller if the voltage drops below a preset threshold.
- What are the different output configurations available for the STM181x series?
The output configurations include push-pull active-low, push-pull active-high, open-drain active-low, and open-drain active-low with push-button/manual reset detect.
- What is the typical supply current of the STM1810MWX7F?
The typical supply current is 4 µA.
- What is the operating temperature range of the STM1810MWX7F?
The operating temperature range is –40 °C to 105 °C.
- What package type is the STM1810MWX7F available in?
The device is available in the SOT23-3 package.
- Does the STM1810MWX7F have push-button/manual reset detect capability?
No, this specific model does not have push-button/manual reset detect. However, other models in the series (STM1813/1818) do have this feature.
- What is the reset pulse width of the STM1810MWX7F?
The reset pulse width is a minimum of 100 ms.
- Is the STM1810MWX7F compatible with other reset devices?
Yes, it is fully compatible with DS181x and MXD181x products.
- What are the reset thresholds for the STM1810MWX7F?
The reset thresholds are factory-trimmed and typically 4.62 V or 4.37 V depending on the model variant.
- Does the STM1810MWX7F have power supply transient immunity?
Yes, it has power supply transient immunity.
