Overview
The STM811MW16F is a low-power supervisory device manufactured by STMicroelectronics. It is part of the STM809/810/811/812 series of microprocessor reset circuits designed to monitor power supplies and ensure reliable operation of microprocessors. These devices assert a reset signal whenever the supply voltage drops below a preset threshold and keep it asserted until the voltage rises above the threshold for a minimum recovery time.
Key Specifications
| Specification | Value |
|---|---|
| Package | SOT-143 4 |
| Operating Temperature | -40°C to 85°C |
| Supply Voltage Monitoring | 3 V, 3.3 V, 5 V |
| Reset Pulse Width | 140 ms (min) |
| Supply Current | 6 µA (typ), 15 µA (max) |
| Max Supply Voltage | 5.5 V |
| Reset Threshold Voltage | 4.31 V (min) |
| RST Output Configuration | Push-pull RST output |
Key Features
- Lead-free and available in small SOT23 and SOT143 packages
- Precision monitoring of 3 V, 3.3 V, and 5 V supply voltages
- Guaranteed RST/RST assertion down to VCC = 1.0 V
- Low supply current: 6 µA (typical)
- Push-button reset input (MR) available on STM811/812 models
- Industrial grade with operating temperature range of -40°C to 85°C
Applications
The STM811MW16F is suitable for various applications, including communications equipment, computers, and peripherals, as well as industrial control systems. Its reliability and precision make it a valuable component in ensuring the stable operation of microprocessors in diverse environments.
Q & A
- What is the primary function of the STM811MW16F?
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 STM811MW16F?
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 STM811MW16F?
The minimum reset pulse width is 140 ms. - What is the typical supply current of the STM811MW16F?
The typical supply current is 6 µA. - What is the maximum operating temperature of the STM811MW16F?
The maximum operating temperature is 85°C. - Does the STM811MW16F have a push-button reset feature?
Yes, the STM811/812 models include a push-button reset input (MR). - What package types are available for the STM811MW16F?
The device is available in SOT-143 4 packages. - Is the STM811MW16F RoHS compliant?
Yes, it is RoHS compliant with an Ecopack3 grade. - What are some typical applications of the STM811MW16F?
Typical applications include communications equipment, computers, peripherals, and industrial control systems. - What is the minimum reset threshold voltage for the STM811MW16F?
The minimum reset threshold voltage is 4.31 V.
