Overview
The STM706TM6F is a self-contained supervisory circuit manufactured by STMicroelectronics. It is designed to provide microprocessor supervisory functions, ensuring the reliable operation of microcontrollers and other digital systems. The device features a precision voltage reference and comparator that monitor the VCC input for out-of-tolerance conditions, thereby protecting the system from voltage anomalies.
Key Specifications
| Parameter | Description |
|---|---|
| Reset Threshold Voltage (VRST) | Typically around the specified threshold (e.g., 2.63 V for STM706T) |
| Reset Timeout Period (trec) | 200 ms (typ.) |
| Watchdog Timer | 1.6 s (typ.) |
| Manual Reset Input (MR) | Active-low input with internal pull-up |
| Power-Fail Comparator | Power-fail input (PFI) and output (PFO) |
| Supply Current | 40 µA (typ.) |
| Package Options | 8-pin SOIC or 8-pin TSSOP |
| Operating Temperature Range | -40°C to +85°C |
| VCC Range | 1.0 V to 5.5 V |
Key Features
- Precision Voltage Reference and Comparator: Monitors the VCC input for out-of-tolerance conditions, ensuring the system's stability.
- Reset Outputs: Active-low (RST) and active-high (RST) reset outputs available, depending on the device variant.
- Watchdog Timer: Detects if the MCU is out of control by monitoring the watchdog input (WDI); timer can be disabled by floating WDI.
- Manual Reset Input: Allows for manual reset via an active-low input (MR) with an internal pull-up.
- Power-Fail Comparator: Provides an undervoltage detection feature through the power-fail input (PFI) and output (PFO).
Applications
The STM706TM6F is suitable for a variety of applications where reliable microprocessor supervision is critical, including:
- Embedded systems requiring robust voltage monitoring and reset functions.
- Industrial control systems where system reliability is paramount.
- Automotive electronics that demand high reliability and fault tolerance.
- Medical devices and other safety-critical systems.
Q & A
- What is the primary function of the STM706TM6F?
The primary function is to provide microprocessor supervisory functions, including voltage monitoring and reset capabilities. - What types of reset outputs are available on the STM706TM6F?
The device offers both active-low (RST) and active-high (RST) reset outputs, depending on the variant. - How does the watchdog timer function in the STM706TM6F?
The watchdog timer detects if the MCU is out of control by monitoring the watchdog input (WDI); it can be disabled by floating WDI. - What is the purpose of the manual reset input (MR)?
The manual reset input allows for manual reset via an active-low input with an internal pull-up. - How does the power-fail comparator work?
The power-fail comparator provides an undervoltage detection feature through the power-fail input (PFI) and output (PFO), signaling a failing power supply. - What are the typical operating temperature and VCC ranges for the STM706TM6F?
The operating temperature range is -40°C to +85°C, and the VCC range is 1.0 V to 5.5 V. - What package options are available for the STM706TM6F?
The device is available in 8-pin SOIC and 8-pin TSSOP packages. - How does the reset timeout period work?
The reset output stays low for at least the reset timeout period (typically 200 ms) after VCC returns above the reset threshold. - Can the watchdog function be disabled?
Yes, the watchdog function can be disabled by allowing the WDI pin to float or by tri-stating the driver connected to WDI. - What happens when VCC falls below 1 V?
When VCC falls below 1 V, the state of the RST output can no longer be guaranteed and becomes essentially an open circuit.
