Overview
The STM1818RWX7F is a low power reset circuit produced by STMicroelectronics. It is designed to monitor power supplies for microcontrollers, ensuring that the system operates reliably by asserting a reset signal whenever the supply voltage drops below a preset threshold. This device is part of the STM181x family, which offers various output configurations and features to cater to different application needs.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Temperature Min | -40.0 | °C |
| Operating Temperature Max | 105.0 | °C |
| ECCN US | EAR99 | |
| ECCN EU | NEC | |
| Packing Type | Tape And Reel | |
| RoHs compliant | Ecopack3 | |
| Grade | Industrial | |
| Package Name | SOT23 | |
| Reset Pulse Width | 100 ms (min.) | |
| Supply Current | 4 µA (typ.) | |
| Reset Thresholds | 2.55 V, 2.88 V, 3.06 V, 4.37 V, 4.62 V (typ.) | |
| Reset Threshold Accuracy | ± 2.5% (-40 °C to 105 °C) |
Key Features
- Precision monitoring of 3 V, 3.3 V, and 5 V supply voltages
- Four output configurations: push-pull active-high, push-pull active-low, open-drain active-low, and open-drain active-low with push-button detect
- Low supply current of 4 µA (typ.)
- Guaranteed assertion down to VCC = 1.0 V (0 °C to 105 °C)
- Factory-trimmed reset thresholds between 2.55 V and 4.62 V
- Power supply transient immunity
- Push-button/manual reset detect feature (for STM1813 and STM1818)
- Available in the SOT23-3 package
- Operating temperature range: –40 °C to 105 °C
Applications
The STM1818RWX7F is ideal for use in various applications where reliable power supply monitoring is crucial, such as:
- Portable electronic devices
- Microcontroller-based systems
- Embedded systems requiring power supply monitoring
- Industrial control systems
- Automotive electronics
Q & A
- What is the primary function of the STM1818RWX7F?
The primary function is to monitor the power supply voltage and assert a reset signal if the voltage drops below a preset threshold.
- What are the different output configurations available in the STM181x family?
The output configurations include push-pull active-high, push-pull active-low, open-drain active-low, and open-drain active-low with push-button detect.
- What is the typical supply current of the STM1818RWX7F?
The typical supply current is 4 µA.
- What is the operating temperature range of the STM1818RWX7F?
The operating temperature range is –40 °C to 105 °C.
- Does the STM1818RWX7F have a push-button/manual reset detect feature?
- What is the package type of the STM1818RWX7F?
The package type is SOT23.
- What are the available reset thresholds for the STM1818RWX7F?
The reset thresholds are available between 2.55 V and 4.62 V.
- Is the STM1818RWX7F RoHS compliant?
- What is the minimum reset pulse width of the STM1818RWX7F?
The minimum reset pulse width is 100 ms.
- Does the STM1818RWX7F provide power supply transient immunity?
