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STMicroelectronics STM707M6F
- Part No.:
- STM707M6F
- Manufacturer:
- STMicroelectronics
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
STM707M6F.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,459
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Product details
Overview
STM707M6F from STMicroelectronics is a 5 V precision voltage supervisor IC with dual reset outputs (active-low RST and active-high RST), power-fail comparator (PFI/PFO), manual reset input (MR), and no watchdog timer. It asserts reset down to VCC = 1.0 V, features 4.50–4.75 V reset threshold, 200 ms typical reset timeout (trec), and operates from –40 °C to +85 °C in industrial applications such as microcontroller-based power management systems.
For engineers reviewing the STM707M6F datasheet, STM707M6F pinout, STM707M6F application, or STM707M6F equivalent, key selection criteria include guaranteed reset assertion at low VCC, dual-polarity reset signaling, PFI threshold of 1.25 V (typ), TSSOP8 package compatibility, and absence of watchdog functionality compared to STM705/706.
Technical Context
The STM707M6F implements a dual-comparator architecture: one for VCC monitoring (VRST = 4.50–4.75 V) and another for independent power-fail detection (VPFI = 1.25 V). It uses internal timing circuitry to guarantee ≥200 ms reset pulse width after VCC recovery or MR release.
Its dual reset outputs (RST and RST) enable direct interfacing with microprocessors requiring either active-low or active-high reset assertion, while the push-pull PFO output provides noise-immune early warning of supply droop without external pull-ups.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Operating Range | 4.5 V to 5.5 V - supports standard 5 V rail with ±10% tolerance. |
| Reset Threshold (VRST) | 4.50 V to 4.75 V - precise VCC monitoring ensures reliable MCU reset before brownout. |
| Reset Timeout (trec) | 200 ms (typ) - guarantees sufficient reset hold time for full microprocessor initialization. |
| Power-Fail Threshold (VPFI) | 1.25 V (typ) - enables early detection of failing supplies via external resistor divider. |
| Supply Current | 40 µA (typ) - ultra-low quiescent current minimizes impact on standby power budget. |
| Operating Temperature | –40 °C to +85 °C - qualified for industrial-grade embedded systems with thermal cycling. |
| Reset Assertion Down to VCC | 1.0 V - ensures deterministic reset behavior even during deep undervoltage conditions. |
Pinout & Package
STM707M6F is housed in an 8-pin TSSOP package (3 mm × 3 mm body, 0.65 mm pitch), optimized for space-constrained PCB layouts while maintaining thermal and electrical performance comparable to SO8.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - PFO | Power-fail output | Push-pull active-low signal indicating PFI < VPFI; drives MR or interrupt line directly. |
| 2 - PFI | Power-fail input | Analog input referenced to 1.25 V; connects to voltage divider for pre-brownout detection. |
| 3 - NC | No connect | Unbonded pin; must remain unconnected per datasheet to avoid parametric shift. |
| 4 - RST | Active-low reset output | Push-pull output asserted low during VCC fault or MR activation; compatible with standard MCU reset inputs. |
| 5 - VCC | Supply voltage input | Primary 5 V power connection; powers internal comparators, timers, and output drivers. |
| 6 - MR | Manual reset input | Active-low input with internal 40 kΩ pull-up; debounced by trec timer, requires no external RC. |
| 7 - RST | Active-high reset output | Push-pull output asserted high during valid VCC; interfaces directly with processors needing active-high reset. |
| 8 - VSS | Ground reference | Return path for all internal circuits; must be low-impedance connection to system ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-polarity reset outputs | RST (active-low) and RST (active-high) eliminate need for external inverters in mixed-signaling systems. |
| Guaranteed reset down to VCC = 1.0 V | Ensures deterministic reset state during severe brownout, preventing MCU latch-up or undefined operation. |
| Independent power-fail comparator | VPFI = 1.25 V threshold enables early warning of supply collapse before VCC drops below VRST. |
| Internal 200 ms reset timeout timer | Eliminates external RC timing components and associated drift or temperature sensitivity. |
| Low 40 µA supply current | Reduces standby power draw in battery-backed or energy-sensitive applications without sacrificing supervision accuracy. |
Applications
| Industrial PLC Controller | Automotive Body Control Module |
|---|---|
Use Scenario: Supervises 5 V microcontroller power rail in programmable logic controllers exposed to wide ambient temperature swings and EMI. IC Role / Device Role / Timing Role: Monitors VCC for brownout, asserts dual reset signals to ensure clean boot, and triggers PFO before main supply fails. Use Value: Prevents firmware corruption during grid instability by guaranteeing reset assertion down to 1.0 V and enabling early power-fail response via PFI. |
Use Scenario: Manages reset sequencing for 5 V MCUs in door module ECUs where supply ripple and cold-cranking events occur. IC Role / Device Role / Timing Role: Provides robust reset hold time (200 ms) and dual-output flexibility to match legacy and new MCU reset polarity requirements. Use Value: Eliminates need for discrete level-shifting or inverter logic, reducing BOM count and board area in space-constrained automotive modules. |
| Medical Infusion Pump | Smart Energy Meter |
Use Scenario: Ensures fail-safe restart of safety-critical MCU after AC/DC converter output sag during transient load steps. IC Role / Device Role / Timing Role: Uses PFI to monitor unregulated DC bus, generating PFO alert before regulated 5 V rail collapses, allowing graceful shutdown. Use Value: Enables deterministic power-loss response within 200 ms window, meeting IEC 62304 Class C software safety requirements. |
Use Scenario: Supervises 5 V supply in revenue-grade meters operating continuously under variable grid conditions and temperature extremes. IC Role / Device Role / Timing Role: Delivers stable reset timing across –40 °C to +85 °C and maintains reset assertion integrity down to 1.0 V VCC. Use Value: Guarantees accurate metering continuity during brief mains dips by avoiding spurious resets caused by marginal VCC transitions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM706M6F | Includes watchdog timer (1.6 s timeout); identical VRST, trec, and PFI/PFO specs. | Required where MCU watchdog supervision is needed; not drop-in due to WDI/WDO pin presence. | Select when system-level fault recovery mandates periodic watchdog servicing. |
| MAX809SEUR+T | Single active-low reset output only; no PFI/PFO, no MR, VRST = 4.63 V ±1.5%, trec = 240 ms. | Suitable for basic reset-only functions; lacks dual-reset and power-fail warning capability. | Choose only if design omits manual reset and early power-fail detection, prioritizing cost over feature set. |
Compared with STM707M6F, STM706M6F adds watchdog supervision at the cost of two extra pins and higher complexity, while MAX809SEUR+T reduces functionality to minimal reset assertion-making STM707M6F optimal for designs requiring dual-reset polarity and PFI-triggered alerts without watchdog overhead.
Availability
STM707M6F is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, medical infusion pumps, and smart energy meters requiring stable component supply with guaranteed long-term availability.
Supply support for STM707M6F includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
STMicroelectronics is a global semiconductor leader specializing in power management, microcontrollers, and analog ICs, with manufacturing and R&D operations across Europe, Asia, and the Americas.
The STM70x series was designed specifically for robust, low-power microprocessor supervision in industrial and automotive environments-emphasizing guaranteed reset behavior, dual-output flexibility, and early power-fail detection.
FAQ
What is the function of the NC pin on STM707M6F?
Pin 3 is marked NC (No Connect) and is internally unbonded. It must remain unconnected on the PCB to prevent parasitic coupling or parametric shifts. Unlike floating inputs, NC pins have no internal circuitry and serve only mechanical alignment or package compatibility purposes.
Can STM707M6F replace STM706M6F in an existing design?
No-STM707M6F lacks the watchdog timer and associated WDI/WDO pins present on STM706M6F. Replacing it would remove watchdog supervision capability and require PCB layout changes due to different pin assignments. The devices share RST/RST/MR/PFI/PFO/VCC/VSS but differ in functional scope and pin count mapping.
How does the PFI input interface with a 12 V unregulated supply?
PFI accepts up to VCC (5.5 V max), so a resistor divider (e.g., 100 kΩ + 12.4 kΩ) scales 12 V to ~1.25 V at PFI. This allows detection of supply droop ~10–15 ms before VCC falls below 4.50 V, enabling preemptive system response without loading the main regulator.
Is STM707M6F RoHS compliant and lead-free?
Yes-STM707M6F is RoHS-compliant and lead-free per Directive 2011/65/EU. Its TSSOP8 package uses matte tin (Sn) termination, and the device meets JEDEC J-STD-020 moisture sensitivity level MSL3, supporting standard reflow profiles.
STM707M6F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.63V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High/Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
STM707M6F FAQ
1.How can I place an order for STM707M6F through Aetrix?
Please submit a Request for Quotation (RFQ) for STM707M6F on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for STM707M6F reliable?
The price and inventory of STM707M6F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM707M6F is usually 5 days.
3.What payment methods are accepted for STM707M6F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM707M6F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM707M6F?
STM707M6F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM707M6F order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for STM707M6F?
For technical support, including STM707M6F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM707M6F requirements.
6.How does Aetrix verify that STM707M6F is sourced from the original manufacturer or authorized distributors?
All STM707M6F products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that STM707M6F meets industry standards.
7.What is the process for return or replacement of STM707M6F?
All STM707M6F units undergo pre-shipment inspection (PSI). If there is an issue with STM707M6F, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The STM707M6F part is unused and in its original packaging.
Return procedure for STM707M6F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STM707M6F Tags
-
MIC826SYMT-TR
Microchip Technology
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APX803S-31SA-7
Diodes Incorporated
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APX803L20-29SA-7
Diodes Incorporated
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V6340RSP3B+
EM Microelectronic
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EM6325CXSP5B-2.9+
EM Microelectronic
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MCP120T-300I/TT
Microchip Technology
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MCP130T-315I/TT
Microchip Technology
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MCP120T-475I/TT
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