Overview
The STM1816TWX7F is a low-power reset circuit device produced by STMicroelectronics. It is designed to monitor power supplies for microcontrollers and assert a reset signal when the supply voltage drops below a preset threshold. This device is part of the STM181x family, which offers various output configurations and is ideal for use in portable equipment and other applications requiring reliable power supply monitoring.
Key Specifications
| Parameter | Description |
|---|---|
| Output Configuration | Open-drain, active-low with internal 5.5 kΩ pull-up resistor |
| Reset Pulse Width | 100 ms (minimum) |
| Supply Current | 4 μA (typical) |
| Reset Thresholds | Factory-trimmed: 2.55 V, 2.88 V, 3.06 V, 4.37 V, and 4.62 V (typical) |
| Operating Temperature | –40 °C to 105 °C |
| Reset Threshold Accuracy | ± 2.5% (–40 °C to 105 °C) |
| Package | SOT23-3 |
| Power Supply Transient Immunity | Designed to ignore fast transients on VCC |
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 (typical)
- Guaranteed assertion down to VCC = 1.0 V (0 °C to 105 °C)
- Push-button/manual reset detect (for certain models like STM1813/1818)
- Power supply transient immunity
- Available in the space-saving SOT23-3 package
- Fully compatible with DS181x and MXD181x products
Applications
The STM1816TWX7F is suitable for various applications requiring reliable power supply monitoring, including:
- Portable equipment due to its low power consumption and small package size
- Microcontroller systems that need robust reset functionality
- Embedded systems where power supply stability is critical
- Industrial and consumer electronics where reliable operation is essential
Q & A
- What is the primary function of the STM1816TWX7F?
The primary function of the STM1816TWX7F is to monitor the power supply voltage and assert a reset signal when the voltage drops below a preset threshold.
- What are the different output configurations available in the STM181x family?
The STM181x family offers four output configurations: 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 STM1816TWX7F?
The typical supply current of the STM1816TWX7F is 4 μA.
- What are the available reset thresholds for the STM1816TWX7F?
The reset thresholds available are 2.55 V, 2.88 V, 3.06 V, 4.37 V, and 4.62 V (typical).
- What is the operating temperature range of the STM1816TWX7F?
The operating temperature range is –40 °C to 105 °C.
- Does the STM1816TWX7F have power supply transient immunity?
- What package type is the STM1816TWX7F available in?
The STM1816TWX7F is available in the SOT23-3 package.
- Is the STM1816TWX7F compatible with other reset devices?
- What is the minimum reset pulse width of the STM1816TWX7F?
The minimum reset pulse width is 100 ms.
- Does the STM1816TWX7F have a manual reset feature?
No, the STM1816TWX7F does not have a manual reset feature. This feature is available in models like STM1813 and STM1818.
