Overview
The STM6821MWY6F is a 5-pin supervisor IC produced by STMicroelectronics, designed to provide comprehensive microprocessor supervisory functions. This device integrates a precision voltage reference and comparator to monitor the VCC input for out-of-tolerance conditions, ensuring reliable operation of the microprocessor. It also features a watchdog timer and a push-button reset input, making it a versatile component for various embedded systems.
Key Specifications
| Parameter | Value |
|---|---|
| Package | SOT23-5L |
| Operating Temperature | –40 to +85 °C (industrial grade) |
| VCC Monitoring | 5, 3.3, 3, or 2.5 V power supplies |
| RST Outputs | Active low, push-pull or open drain; Active high, push-pull |
| Reset Pulse Width | 1.4 ms, 200 ms, and 240 ms (typ.) |
| Watchdog Timeout Period | 1.6 s (typ.) |
| Manual Reset Input | Push-button (MR) |
| Supply Current | 3 μA (typ.) |
| RST Assertion Down to VCC | 1.0 V |
| RoHS Compliance | Ecopack3 |
Key Features
- Precision VCC monitoring of 5, 3.3, 3, or 2.5 V power supplies
- RST outputs (active low, push-pull or open drain; active high, push-pull)
- Reset pulse width of 1.4 ms, 200 ms, and 240 ms (typ.)
- Watchdog timeout period of 1.6 s (typ.)
- Manual reset input (MR)
- Low supply current - 3 μA (typ.)
- Guaranteed RST assertion down to VCC = 1.0 V
- Operating temperature: –40 to +85 °C (industrial grade)
- RoHS compliance - Lead-free components compliant with the RoHS directive
Applications
The STM6821MWY6F is suitable for a wide range of applications, including embedded systems, microcontroller-based designs, and any system requiring reliable power-on reset and watchdog functionality. It is particularly useful in industrial, automotive, and consumer electronics where robust supervisory functions are essential.
Q & A
- What is the primary function of the STM6821MWY6F?
The primary function of the STM6821MWY6F is to provide microprocessor supervisory functions, including precision VCC monitoring, watchdog timer, and push-button reset. - What are the available VCC monitoring voltages for the STM6821MWY6F?
The STM6821MWY6F can monitor VCC inputs of 5, 3.3, 3, or 2.5 V. - What is the typical watchdog timeout period of the STM6821MWY6F?
The typical watchdog timeout period is 1.6 seconds. - What is the supply current of the STM6821MWY6F?
The supply current is typically 3 μA. - Is the STM6821MWY6F RoHS compliant?
Yes, the STM6821MWY6F is RoHS compliant with lead-free components. - What is the operating temperature range of the STM6821MWY6F?
The operating temperature range is –40 to +85 °C (industrial grade). - What types of RST outputs does the STM6821MWY6F offer?
The STM6821MWY6F offers RST outputs that are active low (push-pull or open drain) and active high (push-pull). - Does the STM6821MWY6F have a manual reset input?
Yes, the STM6821MWY6F has a manual reset input (MR) via a push-button. - What is the package type of the STM6821MWY6F?
The package type is SOT23-5L. - What are some common applications for the STM6821MWY6F?
Common applications include embedded systems, microcontroller-based designs, industrial, automotive, and consumer electronics.
