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HomeProductsIntegrated Circuits (ICs)PMIC - SupervisorsSTM706RDS6F
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STM706RDS6F - STMicroelectronics

Manufacturer Part Number
STM706RDS6F
Manufacturer
STMicroelectronics
Allelco Part Number
32D-STM706RDS6F
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
12,740 pcs available, New & Original
Parts Description
IC SUPERVISOR 1 CHANNEL 8TSSOP
Package
8-TSSOP
Data sheet
-
RoHs Status
ROHS3 Compliant
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Specifications

STM706RDS6F Tech Specifications
STMicroelectronics - STM706RDS6F technical specifications, attributes, parameters and parts with similar specifications to STMicroelectronics - STM706RDS6F

Product Attribute Attribute Value
Manufacturer STMicroelectronics
Voltage - Threshold 2.63V
Type Simple Reset/Power-On Reset
Supplier Device Package 8-TSSOP
Series -
Reset Timeout 140ms Minimum
Reset Active Low
Product Attribute Attribute Value
Package / Case 8-TSSOP, 8-MSOP (0.118', 3.00mm Width)
Package Tape & Reel (TR)
Output Push-Pull, Totem Pole
Operating Temperature -40°C ~ 85°C (TA)
Number of Voltages Monitored 1
Mounting Type Surface Mount
Base Product Number STM706

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status ROHS3 Compliant
Moisture Sensitivity Level (MSL) 1 (Unlimited)
REACH Status REACH Unaffected
ECCN EAR99
HTSUS 8542.39.0001

Parts Introduction

STM706RDS6F Image
STM706RDS6F (1)

Manufacturer Part Number

STM706RDS6F

Manufacturer

stmicroelectronics

Introduction

The STM706RDS6F is a simple reset/power-on reset (POR) supervisor IC from STMicroelectronics. It continuously monitors a single supply voltage and generates an active-low reset signal when the voltage falls below a precise threshold. This device is designed to ensure proper system initialization and operation by providing a reliable reset signal to the microcontroller or other critical components.

Product Features and Performance

Monitors a single supply voltage

Precise voltage threshold of 2.63V

Push-pull, totem-pole reset output

Active-low reset signal

Minimum reset timeout of 140ms

Wide operating temperature range of -40°C to +85°C

Product Advantages

Reliable voltage monitoring and reset functionality

Precise and stable voltage threshold

Compact surface-mount package

Wide operating temperature range for diverse applications

Key Reasons to Choose This Product

Ensures proper system initialization and operation

Robust voltage monitoring and reset capabilities

Compact and space-saving design

Suitable for a wide range of operating conditions

Quality and Safety Features

Rigorous quality control and testing procedures

Compliance with industry safety standards

Robust and reliable performance

Compatibility

The STM706RDS6F is compatible with a variety of microcontrollers, processors, and other electronic devices that require a reliable reset signal based on a single supply voltage.

Application Areas

Embedded systems

Industrial automation

Consumer electronics

Automotive electronics

Product Lifecycle

The STM706RDS6F is an obsolete product, meaning it is no longer in active production. However, there may be equivalent or alternative models available from STMicroelectronics or other manufacturers. Customers are advised to contact our website's sales team for more information on current product options and availability.

Frequently Asked Questions(FAQ)

What are the key performance specifications of the STM706RDS6F supervisor IC for power monitoring in low-voltage systems?
The STM706RDS6F is designed for single-channel voltage supervision with a precise 2.63V threshold, making it suitable for systems operating near this critical rail. It provides a push-pull, totem-pole output configuration that allows direct driving of logic inputs without external buffering. With a minimum reset timeout of 140ms, it ensures adequate delay before system initialization begins, which is essential during power-up sequences. Operating over an industrial temperature range from -40°C to +85°C, it maintains reliable functionality in harsh environments. These characteristics make it ideal for applications such as battery-powered devices and embedded controllers requiring deterministic reset behavior.
How does the STM706RDS6F compare to other members of the MAX706 family in terms of pinout and electrical compatibility?
While the STM706RDS6F shares the same base function as the MAX706 series—such as the MAX706RCUA+ or MAX706REUA+—it uses an 8-TSSOP package instead of MSOP. This results in a slightly different footprint, though pin compatibility is generally preserved across variants when considering signal mapping. However, users must verify exact pin functions due to potential differences in enable logic or timeout characteristics between manufacturers. For designs requiring interchangeability, cross-referencing both threshold voltage and timeout duration is recommended before substituting one device for another.
Can the STM706RDS6F be used safely in automotive-grade applications despite not being officially qualified under AEC standards?
Although the STM706RDS6F is not AEC-Q100 certified, its operation within a -40°C to +85°C commercial temperature range suggests reasonable robustness for non-automotive industrial use. Automotive environments often demand stricter reliability criteria, including extended thermal cycling and fault injection testing. If employed in automotive sub-systems outside safety-critical functions—such as infotainment or body control modules—the device may suffice provided additional validation confirms stability under expected operational stresses. However, certification bodies typically require formal qualification for safety-related systems.
What design considerations arise when integrating the STM706RDS6F into a 3.3V microcontroller system with a brown-out detection requirement?
Since the STM706RDS6F monitors at 2.63V, it can effectively trigger a reset if the supply drops below this level during operation. In a 3.3V system, this provides approximately 20% headroom, allowing tolerance for minor supply fluctuations while still protecting against undervoltage conditions. Care must be taken to ensure that the microcontroller’s own brown-out detection (if available) does not conflict with the supervisor’s reset timing. Additionally, the push-pull output must be compatible with the target MCU’s input thresholds; most modern MCUs accept active-low signals directly, but verification against absolute maximum ratings is advised.
How should PCB layout practices be adapted when using the STM706RDS6F in high-noise environments?
Given its role in system integrity, proper placement of the STM706RDS6F near the main power rail minimizes noise coupling through long traces. Decoupling capacitors (typically 0.1µF ceramic) should be placed close to the VCC pin, with short return paths to ground. Avoid routing sensitive feedback traces near the reset line, as glitches could cause unintended resets. Because it operates passively once powered, it draws minimal current—usually under 1µA in standby—so power consumption is less critical than noise immunity. Still, adherence to general analog best practices enhances overall reliability.
What are the implications of selecting the STM706RDS6F over alternative supervisory circuits like those with adjustable thresholds?
The fixed 2.63V threshold of the STM706RDS6F simplifies design by eliminating external resistor networks required for adjustable versions. This reduces component count and improves consistency across production batches. However, it limits flexibility: any change in nominal system voltage necessitates a different supervisor model. For applications where supply margins vary significantly—such as battery-discharge profiles—this rigidity could lead to premature reset triggers or inadequate protection. Thus, the choice depends on whether predictability outweighs adaptability in the specific use case.
Is it feasible to cascade multiple STM706RDS6F devices for multi-rail supervision?
Cascading multiple STM706RDS6F units is technically possible since each has independent monitoring capability, but practical implementation requires careful coordination of reset timing and output logic. Each device’s 140ms timeout must align with system boot sequencing, and OR-ing the reset outputs via diodes or open-collector configurations introduces propagation delays and potential contention. Moreover, cross-talk between rails could cause false resets if not properly isolated. For complex multi-rail systems, dedicated PMICs or programmable supervisors may offer superior integration and diagnostics.
How does moisture sensitivity level (MSL) classification affect handling procedures for the STM706RDS6F during assembly?
Classified as MSL 1 (Unlimited), the STM706RDS6F poses no special storage or handling requirements beyond standard ESD precautions. Manufacturers typically do not mandate baking prior to reflow unless the reel has been exposed to humid conditions exceeding 30 days. This classification reflects confidence in package-level reliability, particularly due to its 8-TSSOP construction with lead-free soldering compatibility. As long as standard IPC guidelines for surface-mount components are followed, risk of moisture-induced defects during wave or reflow soldering is negligible.
What substitution risks exist if replacing the STM706RDS6F with a MAX706 variant in an existing design?
Substituting the STM706RDS6F with alternatives like the MAX706RCUA+ or DS1706REUA+ involves verifying package type, threshold voltage, and reset timeout. While many MAX706 variants share similar electrical characteristics, some include features like manual reset inputs or extended timeout options that may alter system behavior. Additionally, packaging differences (e.g., MSOP vs. TSSOP) affect mechanical footprint and thermal performance. Thorough testing under worst-case operating conditions—including temperature extremes and transient dips—is necessary to confirm functional equivalence before committing to a replacement.
Why might a designer choose the push-pull output topology of the STM706RDS6F instead of an open-drain configuration?
The push-pull, totem-pole output enables faster rise and fall times compared to open-drain solutions, reducing susceptibility to slow transitions caused by capacitive loading or long trace lengths. This speed benefit is crucial in systems where timely assertion of the reset line impacts boot reliability. Furthermore, push-pull drives both high and low states actively, ensuring unambiguous logic levels even in noisy environments. Open-drain would require pull-up resistors, increasing component count and potentially introducing RC time constants that lengthen response latency. Thus, push-pull offers superior signal integrity for most digital reset applications.
How does RoHS compliance influence material selection and environmental reporting for projects incorporating the STM706RDS6F?
As a RoHS3-compliant device, the STM706RDS6F contains restricted substances—including lead, mercury, and cadmium—at permissible levels under EU regulations. This simplifies global market access and reduces regulatory documentation burden. Designers benefit from consistent sourcing without concern for hazardous substance reclassification. Additionally, compliance supports sustainability initiatives and aligns with corporate ESG goals, especially in consumer electronics and medical equipment sectors where environmental responsibility is increasingly scrutinized.
What diagnostic capabilities does the STM706RDS6F provide for system troubleshooting?
The STM706RDS6F offers basic but essential diagnostic functionality through its active-low reset output. By monitoring this line with a logic analyzer or oscilloscope, engineers can verify whether the supervisor correctly detects undervoltage events. However, it lacks advanced features like windowed monitoring, power-good signaling, or status registers. For systems requiring detailed telemetry, pairing the supervisor with debug interfaces or external ADC channels may be necessary. Its simplicity actually aids troubleshooting by minimizing false positives and focusing attention on core supply integrity rather than complex state machines.
Are there any known limitations regarding ESD protection for the STM706RDS6F that impact board-level reliability?
Standard datasheet specifications do not always disclose explicit IEC 61000-4-2 ESD ratings for supervisory ICs like the STM706RDS6F. While internal ESD structures exist, their robustness varies by process node and package. In practice, these devices are generally less tolerant than microcontrollers or power regulators, so exposure during handling or field servicing could lead to latent damage. Implementing board-level protections—such as TVS diodes on power rails and careful grounding—is advisable, especially in industrial settings prone to electrostatic discharge.
How does the 140ms minimum reset timeout benefit real-world embedded system initialization?
The guaranteed 140ms delay ensures that downstream components have sufficient time to stabilize after voltage restoration following a brownout or brown-in event. Many MCUs require several milliseconds to begin executing code, but power supplies may take longer to ramp up fully under load. A shorter timeout could result in premature execution attempts on unstable rails, leading to crashes or corrupted memory. The 140ms margin accommodates typical capacitor charging curves and inductive loads, providing a safe buffer for reliable startup sequences.
Can the STM706RDS6F operate reliably in systems with rapidly fluctuating supply voltages above 2.63V?
Yes, provided the supply remains continuously above 2.63V and does not dip below the threshold for more than the reset timeout period. Transient undershoots shorter than ~200µs are generally ignored by the comparator, assuming adequate bypass capacitance stabilizes the rail. However, frequent or sustained excursions near 2.63V may cause erratic resets, degrading user experience or triggering watchdog timers unnecessarily. Adding bulk capacitance or employing a more sophisticated voltage monitor with hysteresis can mitigate such issues if required by application demands.
What role does the base product number STM706 play in identifying compatible derivatives and legacy replacements?
The STM706 base number indicates shared core architecture across STMicroelectronics’ supervisory family, facilitating cross-referencing with third-party equivalents. Knowing this helps identify related parts with similar pinouts or enhanced features, aiding migration paths when upgrading designs. It also assists distributors and procurement teams in maintaining inventory continuity during lifecycle transitions. However, always validate electrical parameters independently, as minor variations in threshold or timeout among STM706-based devices can impact system behavior.

Parts with Similar Specifications

The three parts on the right have similar specifications to STMicroelectronics STM706RDS6F

Product Attribute STM706PDS6F STM706TDS6F STM706RDS6E STM706SDS6F
Part Number STM706PDS6F STM706TDS6F STM706RDS6E STM706SDS6F
Manufacturer STMicroelectronics STMicroelectronics STMicroelectronics STMicroelectronics
Type - - - -
Series - - - -
Voltage - Threshold - - - -
Reset - - - -
Mounting Type - Surface Mount Through Hole Surface Mount
Base Product Number - DAC34H84 MAX500 ADS62P42
Output - - - -
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Reset Timeout - - - -
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Number of Voltages Monitored - - - -

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Customer Reviews

Evaluation: 10 Articles

  • Arch***ct
    Jul 15, 2026

    Used this device in a communication signal processing board. Stable timing and no unexpected issues during implementation.

  • FPGA***lorer88
    Jul 7, 2026

    The FPGA works properly and all functions operate as expected. Documentation required some additional research, but overall it is a usable device for smaller signal processing projects.

  • Nath***oleman
    Jun 29, 2026

    Used this sensor component in an industrial automation setup. Detection accuracy was consistent and installation was straightforward.

  • Emil***rperTech
    Jun 23, 2026

    Works exactly as described. I used it as a USB-to-SPI bridge in a small MCU development project and communication was stable from the first setup.

  • Liam***terTech
    Jun 15, 2026

    Used this CPLD in a logic control project. Programming was straightforward and signal timing matched the design requirements.

  • Nath***rooks
    Jun 11, 2026

    Installed this power component in a converter board. Output remained stable under different load conditions and thermal performance was better than expected.

  • Dani***alkerTech
    Jun 1, 2026

    Product works, but setup took more effort than expected. Once configured the MCU ran reliably, although documentation support felt older compared with newer platforms. Fine for maintenance projects.

  • Yuki***aka88
    May 26, 2026

    信号通信プロジェクトでこのRS-485トランシーバーを使用しました。設置は簡単で、長距離ケーブルでも通信は安定していました。消費電力も、以前使用していたものより低くなっています。

  • Stev***aker
    May 20, 2026

    Solid diode for power rectification. Works well in switching circuits.

  • Bran***Lewis
    May 11, 2026

    Compact FPGA with good performance. Suitable for basic signal processing tasks.

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STM706RDS6F Image

STM706RDS6F

STMicroelectronics
32D-STM706RDS6F

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