Overview
The STM706RM6F is a microprocessor supervisor IC produced by STMicroelectronics. It is part of the STM70x family, which provides comprehensive supervisory functions for microprocessors. These devices include a precision voltage reference and comparator to monitor the VCC input for out-of-tolerance conditions. When an invalid VCC condition occurs, the reset output (RST) is forced low or high, depending on the specific device variant. The STM706RM6F also features a watchdog timer and a power-fail comparator to provide early warnings of impending power failure.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Reset Threshold Voltage (VRST) | 2.63 | V |
| Reset Timeout Period (trec) | 200 ms (typ.) | ms |
| Watchdog Timer Period | 1.6 s (typ.) | s |
| Supply Current | 40 μA (typ.) | μA |
| Operating Temperature Range | -40 °C to 85 °C | °C |
| Package Type | SO-8 | - |
| RoHS Compliance | Ecopack3 | - |
Key Features
- Precision VCC monitor
- Reset output (RST) with active-low or active-high options
- Watchdog timer (1.6 s typ.)
- Manual reset input (MR)
- Power-fail comparator (PFI/PFO)
- Low supply current (40 μA typ.)
- Guaranteed RST assertion down to VCC = 1.0 V
- Operating temperature range: -40 °C to 85 °C
- RoHS compliance with lead-free components
Applications
The STM706RM6F is suitable for various applications requiring robust microprocessor supervision, including:
- Industrial control systems
- Personal electronics
- Automotive systems
- Medical devices
- Any system requiring reliable power monitoring and reset functions
Q & A
- What is the primary function of the STM706RM6F?
The primary function of the STM706RM6F is to provide microprocessor supervisory functions, including monitoring the VCC input for out-of-tolerance conditions and asserting a reset signal when necessary.
- What are the different reset threshold voltages available for the STM70x family?
The reset threshold voltages vary by device variant: T (3.00 V ≤ VRST ≤ 3.15 V), S (2.88 V ≤ VRST ≤ 3.00 V), and R (2.59 V ≤ VRST ≤ 2.70 V).
- How does the watchdog timer function in the STM706RM6F?
The watchdog timer triggers a reset if the watchdog input (WDI) does not see a rising or falling edge within 1.6 seconds. The timer can be cleared by a reset pulse or by toggling WDI.
- What is the purpose of the power-fail comparator?
The power-fail comparator provides an early warning of impending power failure by comparing the power-fail input (PFI) to an internal reference voltage and asserting the power-fail output (PFO) if PFI falls below the threshold.
- What package types are available for the STM706RM6F?
The STM706RM6F is available in standard 8-pin SOIC and space-saving 8-pin TSSOP packages.
- Is the STM706RM6F RoHS compliant?
- What is the operating temperature range of the STM706RM6F?
The operating temperature range is -40 °C to 85 °C.
- How does the manual reset input (MR) function?
A logic low on the MR input asserts the reset output, which remains asserted as long as MR is low and for the reset timeout period (trec) after MR returns high.
- Can the watchdog function be disabled?
- What is the typical supply current of the STM706RM6F?
The typical supply current is 40 μA.
