Overview
The STM1813LWX7F is a low-power reset circuit device manufactured 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 configurations for different voltage monitoring needs.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Reset Threshold | 2.55 V, 2.88 V, 3.06 V, 4.37 V, 4.62 V (typ.) | V |
| Reset Pulse Width | 100 ms (min.) | ms |
| Supply Current | 4 µA (typ.) at VCC = 3.6 V, no load | µA |
| Operating Temperature | –40 °C to 105 °C | °C |
| Reset Output Configuration | Open-drain, active-low with push-button detect | |
| Package Type | SOT23-3 | |
| Power Supply Transient Immunity | Yes | |
| 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
- Open-drain, active-low output with internal 5.5 kΩ pull-up resistor
- Push-button/manual reset detect feature
- Low supply current of 4 µA (typ.)
- Guaranteed assertion down to VCC = 1.0 V (0 °C to 105 °C)
- Power supply transient immunity
- Available in space-saving SOT23-3 package
- Fully compatible with DS181x and MXD181x products
Applications
The STM1813LWX7F is ideal for use in various applications, including:
- Portable electronic devices
- Microcontroller-based systems
- Embedded systems requiring reliable power monitoring
- Industrial control systems
- Automotive electronics
Q & A
- What is the primary function of the STM1813LWX7F?
The primary function is to monitor the power supply voltage and assert a reset signal when the voltage drops below a preset threshold.
- What are the available reset thresholds for the STM1813LWX7F?
The reset thresholds are available between 2.55 V and 4.62 V.
- What is the typical supply current of the STM1813LWX7F?
The typical supply current is 4 µA at VCC = 3.6 V with no load.
- What is the operating temperature range of the STM1813LWX7F?
The operating temperature range is –40 °C to 105 °C.
- Does the STM1813LWX7F have a push-button/manual reset detect feature?
Yes, it does have a push-button/manual reset detect feature.
- What package type is the STM1813LWX7F available in?
The STM1813LWX7F is available in the SOT23-3 package.
- Is the STM1813LWX7F compatible with other reset devices?
Yes, it is fully compatible with DS181x and MXD181x products.
- How does the STM1813LWX7F handle power supply transients?
The device is designed to ignore fast transients on VCC, providing power supply transient immunity.
- What is the reset pulse width of the STM1813LWX7F?
The reset pulse width is a minimum of 100 ms.
- Can the STM1813LWX7F be used in portable electronic devices?
Yes, it is ideal for use in portable electronic devices due to its low power consumption and small package size.
