Overview
The STM708TM6F is a microprocessor supervisor IC produced by STMicroelectronics. It is part of the STM70x family, designed to provide essential supervisory functions for microprocessors. The device includes a precision voltage reference and comparator that monitors the VCC input for out-of-tolerance conditions, triggering a reset output if such a condition occurs. Additionally, it features a power-fail comparator and manual reset input, ensuring robust system monitoring and control.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| RST Threshold (typ.) | 3.08 | V |
| Reset Timeout (typ.) | 200 ms | - |
| Supply Current (typ.) | 40 μA | - |
| Operating Temperature | -40 °C to 85 °C | - |
| Package | SO-8 | - |
| RoHS Compliance | Ecopack3 | - |
Key Features
- Precision VCC monitor
- RST and RST outputs (active-low and active-high)
- Manual reset input (MR)
- Power-fail comparator (PFI/PFO)
- Low supply current of 40 μA (typ.)
- Guaranteed RST assertion down to VCC = 1.0 V
- Operating temperature range: -40 °C to 85 °C (industrial grade)
- RoHS compliance with lead-free components
Applications
The STM708TM6F is suitable for a variety of applications where microprocessor supervision is critical, including:
- Embedded systems requiring robust power monitoring and reset functions
- Industrial control systems where reliable operation is essential
- Automotive and aerospace systems needing precise voltage monitoring
- Medical devices requiring high reliability and safety features
Q & A
- What is the primary function of the STM708TM6F?
The primary function of the STM708TM6F is to provide microprocessor supervisory functions, including monitoring the VCC input for out-of-tolerance conditions and triggering a reset output if necessary.
- What is the typical reset timeout period for the STM708TM6F?
The typical reset timeout period for the STM708TM6F is 200 ms.
- What is the supply current of the STM708TM6F?
The supply current of the STM708TM6F is typically 40 μA.
- What is the operating temperature range of the STM708TM6F?
The operating temperature range of the STM708TM6F is -40 °C to 85 °C (industrial grade).
- Is the STM708TM6F RoHS compliant?
Yes, the STM708TM6F is RoHS compliant with lead-free components.
- What package options are available for the STM708TM6F?
The STM708TM6F is available in an 8-pin SO-8 package.
- How does the power-fail comparator work in the STM708TM6F?
The power-fail comparator monitors the PFI input against an internal reference voltage. If PFI falls below the power-fail threshold, the PFO output goes low, indicating a failing power supply.
- Can the watchdog timer be disabled on the STM708TM6F?
No, the STM708TM6F does not have a watchdog timer feature. This feature is available on other models like the STM706T/S/R.
- How does the manual reset input work?
A logic low on the MR input asserts the reset output. The reset remains asserted as long as MR is low and for the reset timeout period after MR returns high.
- What happens if VCC falls below 1 V?
If VCC falls below 1 V, the state of the RST output can no longer be guaranteed and becomes essentially an open circuit.
