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Analog Devices Inc./Maxim Integrated DS1706SEUA+
- Part No.:
- DS1706SEUA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
DS1706SEUA+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:115
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Product details
Overview
DS1706SEUA+ from Maxim Integrated is a 3.3V ±10% microprocessor supervisory circuit with active-low reset output, non-maskable interrupt (NMI), watchdog timer, and pushbutton reset control in an 8-pin µSOP package. It monitors VCC, detects power transients, generates early-warning NMI at 1.25V sense threshold, and delivers guaranteed 130ms reset pulse width for reliable microcontroller startup and recovery in industrial embedded systems.
For engineers reviewing the DS1706SEUA+ datasheet, DS1706SEUA+ pinout, DS1706SEUA+ application, or DS1706SEUA+ equivalent, key selection considerations include its 3.3V supply monitoring tolerance, 130ms minimum reset timeout, 1.25V precision IN-sense reference, watchdog timeout of 1.0–2.2s, and compatibility with 3.0V system operation via 20% tolerance variants.
Technical Context
The DS1706SEUA+ integrates three independent monitoring functions: (1) VCC supply monitoring with 4.25–4.50V trip point and 130ms reset hold time; (2) high-impedance IN pin sensing at 1.20–1.30V with hysteresis for early power-fail warning via NMI; and (3) watchdog timer triggered by ST strobe input with 1.0–2.2s timeout and WDS status output. All functions operate across –40°C to +85°C.
Its internal bandgap reference enables accurate voltage detection independent of VCC variation, while PBRST debouncing and ST input pull-up (180kΩ typical) eliminate external RC components. The device asserts RST low on VCC dropout and holds it active for ≥130ms after VCC recovery, ensuring processor stabilization before execution resumes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Trip Point | 4.25V (min) to 4.50V (max); precise threshold for 3.3V systems with ±10% tolerance ensures reset activation before microprocessor brownout. |
| Reset Pulse Width | 130ms (min); guarantees sufficient time for power supply and CPU stabilization during power-up or recovery. |
| IN Sense Threshold | 1.20–1.30V; enables user-configurable early-warning NMI using external resistor divider for upstream voltage monitoring. |
| Watchdog Timeout | 1.0–2.2s; provides configurable software execution supervision with ST input requiring high-to-low transition within interval. |
| Operating Current | 50µA (typ) at VCC < 3.6V; ultra-low quiescent current supports battery-backed or energy-sensitive applications. |
| Temperature Range | –40°C to +85°C; validated industrial-grade operation suitable for harsh environments without derating. |
| Package | 8-pin µSOP (118-mil); compact surface-mount footprint compatible with high-density PCB layouts. |
Pinout & Package
DS1706SEUA+ is housed in an 8-pin µSOP (118-mil) package with gull-wing leads, RoHS-compliant and lead(Pb)-free per ordering suffix '+'. Pin assignments are identical across DIP, SOIC, and µSOP packages per Maxim's pin-compatible family design.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PBRST | Pushbutton Reset Input | Active-low, internally pulled up (40kΩ typ); debounced to generate ≥130ms RST pulse upon button release. |
| VCC | Power Supply Input | Primary supply rail (1.2–5.5V); powers all internal circuits and sets reference for VCC monitoring and I/O levels. |
| GND | Ground Reference | System ground return path; required for stable operation of comparators, reference, and digital logic. |
| IN | Voltage Sense Input | High-impedance (≤1µA leakage) analog input for external voltage divider; triggers NMI when voltage drops below 1.25V. |
| NMI | Non-Maskable Interrupt Output | Open-drain, active-low signal pulsed ≥200µs for early power-fail warning; immune to noise <2µs. |
| ST | Strobe Input | Active-high watchdog trigger; internal 180kΩ pull-up ensures timeout if not toggled within 1.0–2.2s. |
| RST | Active-Low Reset Output | Open-drain, active-low reset signal asserted during VCC fault or PBRST event; held ≥130ms post-recovery. |
| WDS | Watchdog Status Output | Open-drain, active-low flag indicating watchdog timeout; remains low ≥130ms after ST timeout. |
Key Features
| Feature | Design Value |
|---|---|
| Triple-function supervision | Simultaneous VCC monitoring, pushbutton reset control, and watchdog timer eliminate need for discrete supervisors or timers. |
| Configurable voltage sensing | IN pin with 1.25V internal reference allows custom trip points for upstream power rails via external resistor divider. |
| Guaranteed reset timing | 130ms minimum RST assertion ensures robust microprocessor initialization regardless of VCC slew rate or load conditions. |
| No external components required | Internal pull-ups (40kΩ on PBRST, 180kΩ on ST), precision reference, and hysteresis remove need for external RC networks or comparators. |
| Industrial temperature support | Full functionality verified from –40°C to +85°C enables deployment in automotive under-hood, industrial PLC, and outdoor equipment. |
Applications
| Industrial PLC Control | Medical Diagnostic Equipment |
|---|---|
|
Use Scenario: Microcontroller-based programmable logic controllers operating in factory-floor environments with fluctuating 3.3V supplies and EMI exposure. IC Role / Device Role / Timing Role: Supervisory IC providing VCC monitoring, NMI-triggered safe shutdown, and watchdog-enforced firmware recovery. Use Value: Prevents erratic behavior during line sags by asserting RST before brownout and enabling graceful state save via NMI interrupt. |
Use Scenario: Portable ultrasound or patient monitor units powered by Li-ion batteries with regulated 3.3V rails subject to load transients. IC Role / Device Role / Timing Role: System-level supervisor ensuring deterministic boot sequence and detecting firmware hangs during image acquisition. Use Value: Guarantees 130ms reset hold time for full SoC initialization and uses WDS to flag watchdog timeout for diagnostic logging. |
| Telecom Edge Router | Smart Energy Meter |
|
Use Scenario: Carrier-grade edge routers with multi-core processors requiring reliable power sequencing and remote reset capability. IC Role / Device Role / Timing Role: Power integrity guardian monitoring both main 3.3V supply and auxiliary rails via IN pin, with PBRST for field-service reset. Use Value: Enables remote maintenance via NMI-linked PBRST and prevents lockup from corrupted firmware using ST-driven watchdog. |
Use Scenario: ANSI C12.22-compliant electricity meters deployed in unattended outdoor locations with wide ambient temperature swings. IC Role / Device Role / Timing Role: Industrial-grade supervisor ensuring valid reset during cold-start and detecting undervoltage events preceding meter tampering. Use Value: Delivers guaranteed operation down to –40°C and uses 1.25V IN threshold to sense upstream DC-DC converter faults before VCC collapse. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX706TESA+ | Same 3.3V ±5% VCC trip (3.00–3.15V), identical 8-pin SOIC package, but lacks WDS output and has no watchdog timer function. | Suitable only for basic reset-only applications; cannot replace DS1706SEUA+ where watchdog supervision or NMI-driven diagnostics are required. | Select MAX706TESA+ only if system design omits watchdog and NMI features and requires tighter 5% VCC tolerance. |
| TPS3808G12DBVR | TI part with 1.2V fixed reset threshold, 200ms reset timeout, no NMI or watchdog; supports 1.2–6.0V VCC but uses different pinout and logic polarity. | Requires PCB redesign due to non-pin-compatible layout and lacks IN-sense flexibility and dual-reset signaling (RST/*RST). | Choose TPS3808G12DBVR only for cost-sensitive designs needing simple reset without advanced supervision features. |
Compared with MAX706TESA+, DS1706SEUA+ adds watchdog and NMI capabilities critical for safety-critical recovery; versus TPS3808G12DBVR, it offers superior configurability via IN pin, guaranteed 130ms timing, and direct pin compatibility with legacy Maxim designs.
Availability
DS1706SEUA+ is available at Aetrix Electronics and suitable for industrial automation, medical instrumentation, telecom infrastructure, and smart metering applications requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for DS1706SEUA+ 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
Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and power management ICs for industrial, automotive, communications, and computing markets.
The DS1706SEUA+ belongs to Maxim's MicroMonitor™ family-engineered specifically for robust microprocessor supervision in mission-critical embedded systems demanding simultaneous voltage, software, and manual reset monitoring.
FAQ
What is the VCC trip point range for DS1706SEUA+?
The DS1706SEUA+ has a VCC trip point range of 4.25V (minimum) to 4.50V (maximum), optimized for 3.3V systems with ±10% tolerance. This ensures reset activation occurs before the microprocessor enters an undefined state, and the value is confirmed in the DC Electrical Characteristics table of the official Maxim datasheet Rev 4/10.
Does DS1706SEUA+ support watchdog timer functionality?
Yes, DS1706SEUA+ includes a fully integrated watchdog timer with a timeout range of 1.0–2.2 seconds. It monitors the ST input for high-to-low transitions and drives the WDS output low for ≥130ms upon timeout. This feature is explicitly documented in the Watchdog Timer section and AC Electrical Characteristics of the DS1706 datasheet.
Can DS1706SEUA+ be used in 3.0V systems?
Yes, DS1706SEUA+ supports 3.0V systems through its 3.3V ±10% specification, which covers 2.97–3.63V operation. Its 4.25–4.50V VCC trip point ensures reliable reset even when powered from a nominal 3.0V rail with upstream regulation margin, as stated in the Ordering Information and Features sections.
What is the purpose of the IN pin on DS1706SEUA+?
The IN pin on DS1706SEUA+ is a high-impedance voltage sense input referenced to a 1.25V internal comparator threshold. It enables early power-fail detection by monitoring upstream supplies via an external resistor divider, triggering the NMI output before VCC drops out-critical for controlled shutdown sequences.
Is DS1706SEUA+ pin-compatible with other Maxim supervisory ICs?
Yes, DS1706SEUA+ is pin-compatible with the MAX705/MAX706 family in 8-pin DIP, SOIC, and µSOP packages, as confirmed in the Features section and Pin Assignment diagrams. This allows drop-in replacement in existing designs without layout changes, provided the VCC tolerance and feature set match system requirements.
DS1706SEUA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- MicroMonitor™
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.93V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 130ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-uMAX/uSOP
DS1706SEUA+ FAQ
1.How can I place an order for DS1706SEUA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1706SEUA+ 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 DS1706SEUA+ reliable?
The price and inventory of DS1706SEUA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1706SEUA+ is usually 5 days.
3.What payment methods are accepted for DS1706SEUA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1706SEUA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1706SEUA+?
DS1706SEUA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1706SEUA+ 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 DS1706SEUA+?
For technical support, including DS1706SEUA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1706SEUA+ requirements.
6.How does Aetrix verify that DS1706SEUA+ is sourced from the original manufacturer or authorized distributors?
All DS1706SEUA+ 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 DS1706SEUA+ meets industry standards.
7.What is the process for return or replacement of DS1706SEUA+?
All DS1706SEUA+ units undergo pre-shipment inspection (PSI). If there is an issue with DS1706SEUA+, 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 DS1706SEUA+ part is unused and in its original packaging.
Return procedure for DS1706SEUA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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