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STMicroelectronics STM706DS6F
- Part No.:
- STM706DS6F
- Manufacturer:
- STMicroelectronics
- Category:
- Supervisors
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
STM706DS6F.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,147
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Product details
Overview
STM706DS6F from STMicroelectronics is a 5 V precision voltage supervisor IC with active-low and active-high reset outputs, watchdog timer (1.6 s typ), power-fail comparator (VPFI = 1.25 V), and manual reset input - designed for industrial microprocessor systems requiring guaranteed RST assertion down to VCC = 1.0 V and stable reset timing during power-up/down.
For engineers reviewing the STM706DS6F datasheet, STM706DS6F pinout, STM706DS6F application, or STM706DS6F equivalent, this page delivers verified functional identity, exact pin roles, real-world reset timing behavior, watchdog interaction logic, and validated automotive-grade (-40 °C to 125 °C) operation specific to the STM706 variant.
Technical Context
The STM706DS6F integrates a precision voltage reference (VRST = 4.25–4.50 V), dual-reset output architecture (RST low / RST high), and independent power-fail comparator (VPFI = 1.25 V) with push-pull PFO output. Its watchdog timer clears on WDI edge transitions and triggers WDO low after 1.6 s timeout - only functional when WDO is externally connected to MR.
Reset assertion is guaranteed down to VCC = 1.0 V at TA = 0–85 °C (industrial) or –40–125 °C (automotive grade), with 200 ms typical reset timeout (trec) and internal 40 Ω MR pull-up. The device operates exclusively at 5 V nominal supply and supports SO8 and TSSOP8 packages with identical pin mapping.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Operating Voltage | 5 V nominal; device not functional outside 4.5–5.5 V range per absolute ratings. |
| Reset Threshold (VRST) | 4.25–4.50 V; defines VCC undervoltage detection window for RST/RST assertion. |
| Reset Timeout (trec) | 200 ms typical; minimum duration RST remains asserted after VCC recovery or MR release. |
| Watchdog Timeout (tWD) | 1.6 s typical; time window for WDI toggling before WDO goes low; disabled if WDI floats. |
| Power-Fail Threshold (VPFI) | 1.25 V ±1%; independent reference for early warning of supply collapse via PFI/PFO. |
| Supply Current (ICC) | 40 µA typical at 25 °C; enables low-power system monitoring without loading VCC rail. |
| Operating Temperature | –40 °C to 125 °C; automotive-grade rating confirmed for STM706 only (not STM705/707/708). |
Pinout & Package
STM706DS6F is housed in an 8-pin TSSOP package (3 × 3 mm body, DS suffix per ST ordering scheme), pin-compatible with SO8 but offering reduced footprint and thermal resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - PFO | Power-fail output | Push-pull active-low signal indicating PFI < VPFI; can drive MR directly for cascaded reset. |
| 2 - PFI | Power-fail input | Analog input referenced to 1.25 V; typically connected via resistor divider to unregulated supply for early brownout detection. |
| 3 - WDI | Watchdog input | Edge-sensitive input; toggling within 1.6 s prevents WDO timeout; floating disables watchdog. |
| 4 - VCC | Supply voltage | 5 V main power input; powers all internal comparators, timers, and outputs. |
| 5 - MR | Manual reset input | Active-low input with internal 40 Ω pull-up; asserts reset while low and for trec after release. |
| 6 - RST | Active-low reset output | Push-pull output asserted low during VCC fault, MR low, or watchdog timeout (if WDO→MR). |
| 7 - RST | Active-high reset output | Complementary push-pull output asserted high under same conditions as RST. |
| 8 - VSS | Ground | Reference return for all internal circuits and outputs; must be low-impedance connection. |
Key Features
| Feature | Design Value |
|---|---|
| Dual reset polarity outputs | RST (active-low) and RST (active-high) enable direct interface with both legacy and modern MCU reset pins without external inverters. |
| Guaranteed reset down to 1.0 V | Ensures deterministic system halt even during deep brownout, critical for flash write integrity and state machine recovery. |
| Independent power-fail comparator | VPFI = 1.25 V threshold allows early warning of supply collapse before VCC drops below VRST, enabling graceful shutdown. |
| Configurable watchdog timer | 1.6 s timeout with edge-triggered clear enables flexible firmware supervision without fixed polling intervals. |
| Automotive temperature grade | –40 °C to 125 °C operation validated for STM706 only, supporting under-hood and infotainment applications. |
Applications
| Industrial PLC Controller | Automotive Body Control Module |
|---|---|
Use Scenario: Microcontroller-based programmable logic controller operating in factory environments with fluctuating 5 V rails and EMI exposure. IC Role / Device Role / Timing Role: Primary supervisor ensuring reliable boot sequence, detecting brownouts before logic corruption, and enabling watchdog-recovery of stalled control loops. Use Value: 200 ms trec guarantees sufficient hold-off for FPGA configuration and peripheral initialization; dual RST outputs simplify interface to mixed-vendor MCUs. |
Use Scenario: Central body controller managing door locks, lighting, and HVAC in vehicles where ambient temperature exceeds 85 °C. IC Role / Device Role / Timing Role: Automotive-grade voltage monitor asserting reset during cold-crank (VCC dip) and supervising firmware execution via WDI/WDO loop. Use Value: Validated –40 °C to 125 °C operation ensures reliability under hood; PFI/PFO provides early battery sag warning for pre-emptive load shedding. |
| Medical Infusion Pump | Point-of-Sale Terminal |
Use Scenario: Battery-powered infusion pump requiring fail-safe reset during power transitions between AC adapter and Li-ion backup. IC Role / Device Role / Timing Role: Supervisor coordinating safe state retention during switchover, using PFI to monitor battery voltage and trigger controlled shutdown before cutoff. Use Value: 1.25 V VPFI allows precise battery end-of-life detection; guaranteed RST assertion to 1.0 V prevents partial writes to EEPROM calibration data. |
Use Scenario: Retail terminal with 5 V regulated supply subject to transient surges and intermittent AC outages. IC Role / Device Role / Timing Role: Core reset manager asserting RST during line sags, debouncing MR via internal timer, and preventing spurious reboots from noise on long cables. Use Value: Internal 40 Ω MR pull-up eliminates need for external components; 40 µA ICC minimizes standby drain on backup supercapacitors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX692AESA+ | 4.63 V reset threshold, no PFI/PFO, no watchdog, SO8 only | Lacks power-fail warning and firmware supervision capability | Select when only basic reset is needed and space permits SO8 over TSSOP8. |
| TPS3808G33DBVR | 3.3 V supply, 3.08 V reset threshold, adjustable delay, no dual RST outputs | Designed for 3.3 V systems; requires level-shifting for 5 V MCU interfaces | Choose for new 3.3 V designs needing programmable trec and higher accuracy (0.5% VRST). |
Compared with MAX692AESA+ and TPS3808G33DBVR, STM706DS6F uniquely combines 5 V operation, dual-polarity reset, integrated watchdog, and automotive-grade temperature support - making it irreplaceable in legacy 5 V industrial controllers requiring PFI-based predictive shutdown.
Availability
STM706DS6F is available at Aetrix Electronics and suitable for industrial PLCs, automotive body controllers, medical infusion pumps, and point-of-sale terminals requiring stable component supply with automotive qualification and long-term lifecycle assurance.
Supply support for STM706DS6F 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 headquartered in Geneva, specializing in microcontrollers, power management, and analog ICs for industrial, automotive, and consumer markets.
The STM70x series targets robust system-level supervision in harsh environments, delivering precision reset, watchdog safety, and power-fail prediction for mission-critical embedded control applications.
FAQ
What is the function of the WDO pin on STM706DS6F?
The WDO (Watchdog Output) pin goes low after 1.6 s if no edge occurs on WDI, and returns high immediately upon WDI transition or when VCC rises above VRST. It is a push-pull output that must be externally connected to MR to trigger system reset - unlike RST, WDO does not assert automatically on VCC fault alone.
Can STM706DS6F operate with a 3.3 V supply?
No. STM706DS6F is specified only for 5 V nominal operation (4.5–5.5 V range). Attempting 3.3 V supply results in undefined reset behavior, failure to assert RST below VRST, and potential non-functional watchdog or PFI circuitry per absolute maximum ratings and DC characteristics tables.
How does the power-fail comparator differ from the VCC reset comparator?
The power-fail comparator uses a dedicated 1.25 V reference (VPFI) independent of the 4.25–4.50 V VCC reset threshold (VRST), allowing early detection of supply decay before VCC reaches the reset point. PFI is intended for monitoring unregulated rails or battery voltage dividers, while VRST monitors the regulated 5 V domain directly.
Is STM706DS6F pin-compatible with STM705 or STM708?
Yes - all STM70x devices share identical 8-pin TSSOP/SO8 pinouts and terminal functions. However, feature sets differ: STM705 includes watchdog and dual reset like STM706, while STM708 lacks watchdog and has only single RST output; substituting requires verifying required features match the target application.
STM706DS6F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.38V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
STM706DS6F FAQ
1.How can I place an order for STM706DS6F through Aetrix?
Please submit a Request for Quotation (RFQ) for STM706DS6F 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 STM706DS6F reliable?
The price and inventory of STM706DS6F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM706DS6F is usually 5 days.
3.What payment methods are accepted for STM706DS6F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM706DS6F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM706DS6F?
STM706DS6F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM706DS6F 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 STM706DS6F?
For technical support, including STM706DS6F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM706DS6F requirements.
6.How does Aetrix verify that STM706DS6F is sourced from the original manufacturer or authorized distributors?
All STM706DS6F 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 STM706DS6F meets industry standards.
7.What is the process for return or replacement of STM706DS6F?
All STM706DS6F units undergo pre-shipment inspection (PSI). If there is an issue with STM706DS6F, 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 STM706DS6F part is unused and in its original packaging.
Return procedure for STM706DS6F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STM706DS6F Tags
-
MIC826SYMT-TR
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APX803L20-29SA-7
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