Overview
The STM811SW16F is a low-power supervisory device from STMicroelectronics, designed to monitor power supplies and ensure reliable operation of microprocessors. It belongs to the STM809/810/811/812 family of MICROPROCESSOR RESET Circuits. These devices are crucial for maintaining system integrity by asserting a reset signal when the supply voltage drops below a preset threshold and keeping it asserted until the voltage rises above the threshold for a minimum recovery time.
Key Specifications
| Parameter | Value |
|---|---|
| Package | SOT-143 4 |
| Operating Temperature | 40 °C to 85 °C (industrial grade) |
| Supply Voltage Monitoring | 3 V, 3.3 V, and 5 V |
| Reset Pulse Width | 140 ms (min) |
| Output Configuration | Push-pull RST output |
| Supply Current | 6 µA (typ) |
| RST Assertion | Down to VCC = 1.0 V |
| RoHS Compliance | Ecopack3 |
Key Features
- Lead-free, small SOT23 and SOT143 package
- Precision monitoring of 3 V, 3.3 V, and 5 V supply voltages
- 140 ms reset pulse width (min)
- Push-pull RST output configuration
- Guaranteed RST assertion down to VCC = 1.0 V
- Low supply current - 6 µA (typ)
- Push-button reset input (MR) available on STM811/812 models
Applications
The STM811SW16F is suitable for various applications, including:
- Communications equipment
- Computers and peripherals
- Industrial control systems
Q & A
- What is the primary function of the STM811SW16F?
The primary function is to monitor power supplies and assert a reset signal when the supply voltage drops below a preset threshold. - What are the supported supply voltages for the STM811SW16F?
The device supports precision monitoring of 3 V, 3.3 V, and 5 V supply voltages. - What is the minimum reset pulse width of the STM811SW16F?
The minimum reset pulse width is 140 ms. - What is the typical supply current of the STM811SW16F?
The typical supply current is 6 µA. - What is the operating temperature range of the STM811SW16F?
The operating temperature range is from 40 °C to 85 °C (industrial grade). - Does the STM811SW16F have a push-button reset input?
Yes, the STM811/812 models include a push-button reset input (MR). - What is the package type of the STM811SW16F?
The package type is SOT-143 4. - Is the STM811SW16F RoHS compliant?
Yes, it is RoHS compliant with an Ecopack3 rating. - What are some typical applications for the STM811SW16F?
Typical applications include communications equipment, computers and peripherals, and industrial control systems. - How does the STM811SW16F ensure reliable system operation?
It ensures reliable system operation by asserting a reset signal when the supply voltage drops below a preset threshold and keeping it asserted until the voltage rises above the threshold for a minimum recovery time.
