Overview
The STM1816RWX7F is a low-power supervisory circuit produced by STMicroelectronics. It is part of the STM181x series, designed to monitor power supplies for microcontrollers and ensure proper system reset during power-up, power-down, and brownout conditions. This device is particularly useful in applications requiring precise voltage monitoring and reliable reset functionality.
Key Specifications
| Parameter | Description | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|---|
| Operating Voltage (VCC) | Operating voltage range | 1.0 | - | 5.5 | V |
| Supply Current (ICC) | Supply current at VCC = 3.6 V, no load | 4 | 10 | - | µA |
| Reset Threshold (VRST) | Reset threshold voltage | 2.55 | - | - | V |
| Reset Pulse Width (trec) | Minimum reset pulse width | 100 | - | - | ms |
| Output Configuration | Output type | Open-drain, active-low | - | - | - |
| Operating Temperature | Operating temperature range | -40 | - | 105 | °C |
| Package | Package type | SOT23-3 | - | - | - |
Key Features
- Precision Voltage Monitoring: The STM1816RWX7F monitors supply voltages with precision, offering reset thresholds between 2.55 V and 4.62 V.
- Low Power Consumption: The device has a low supply current of typically 4 µA at 3.6 V.
- Open-Drain Output: It features an open-drain, active-low reset output with an internal 5.5 kΩ pull-up resistor.
- Reset Pulse Width: The reset pulse width is a minimum of 100 ms.
- Transient Immunity: The device is designed to ignore fast transients on VCC.
- Operating Temperature Range: It operates over a temperature range of –40 °C to 105 °C.
- Compact Package: Available in the space-saving SOT23-3 package.
Applications
The STM1816RWX7F is ideal for use in various applications, including:
- Portable Equipment: Due to its low power consumption and compact package, it is well-suited for battery-powered devices.
- Embedded Systems: It ensures reliable reset functionality in microcontroller-based systems.
- Industrial Automation: Used in systems that require robust voltage monitoring and reset capabilities.
- Consumer Electronics: Suitable for use in a wide range of consumer electronic devices that require precise voltage monitoring.
Q & A
- What is the primary function of the STM1816RWX7F?
The primary function is to monitor the power supply for microcontrollers and assert a reset signal when the voltage drops below a specified threshold.
- What are the available reset thresholds for the STM1816RWX7F?
The reset thresholds are available between 2.55 V and 4.62 V.
- What is the typical supply current of the STM1816RWX7F?
The typical supply current is 4 µA at 3.6 V.
- What type of output does the STM1816RWX7F have?
The output is open-drain, active-low with an internal 5.5 kΩ pull-up resistor.
- What is the minimum reset pulse width of the STM1816RWX7F?
The minimum reset pulse width is 100 ms.
- What is the operating temperature range of the STM1816RWX7F?
The operating temperature range is –40 °C to 105 °C.
- In what package is the STM1816RWX7F available?
The device is available in the SOT23-3 package.
- Is the STM1816RWX7F suitable for portable equipment?
Yes, it is suitable due to its low power consumption and compact package.
- Does the STM1816RWX7F have transient immunity?
Yes, it is designed to ignore fast transients on VCC.
- Can the STM1816RWX7F be used in industrial automation systems?
Yes, it is suitable for use in industrial automation systems that require robust voltage monitoring and reset capabilities.
