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Analog Devices Inc./Maxim Integrated DS1706SEPA
- Part No.:
- DS1706SEPA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
DS1706SEPA.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,264
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Product details
Overview
DS1706SEPA from Maxim Integrated is a 3.3V ±10% precision voltage supervisor IC with watchdog timer, non-maskable interrupt (NMI), and pushbutton reset control - designed for microprocessor power monitoring in industrial embedded systems. It delivers active-low reset (RST), watchdog status (WDS), and NMI outputs, features 130 ms minimum reset pulse width, 1 s watchdog timeout, and operates across -40°C to +85°C.
For engineers reviewing the DS1706SEPA datasheet, DS1706SEPA pinout, DS1706SEPA application, or DS1706SEPA equivalent, key selection considerations include VCC trip point accuracy (3.08 V typ), IN-pin programmable voltage sensing, PBRST debounced input timing, and compatibility with 3.3V logic-level microcontrollers requiring fail-safe startup and runtime supervision.
Technical Context
The DS1706SEPA integrates three independent supervision functions: (1) VCC monitoring with 3.08 V typical trip point and 130 ms reset assertion delay; (2) high-impedance IN-pin voltage sensing (1.25 V reference) enabling early power-fail detection upstream of the regulator; (3) watchdog timer triggered by ST strobe input with 1.0–2.2 s timeout and 130 ms WDS active-low pulse on timeout.
It supports dual reset polarity via RST only (no *RST), uses internal pull-ups on PBRST (40 kΩ) and ST (180 kΩ), and provides noise-immune NMI generation with 5 µs response time and 100 µV hysteresis - all within a single 8-pin DIP package operating at 1.2–5.5 V supply range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Trip Point | 3.08 V (typ), ±10% tolerance - ensures reliable reset assertion for 3.3 V systems with marginal supply regulation. |
| Reset Pulse Width | 130–285 ms - guarantees sufficient processor stabilization time after power-up or recovery. |
| Watchdog Timeout | 1.0–2.2 s - provides robust software execution monitoring without false triggers during transient code stalls. |
| NMI Response Time | 5–8 µs - enables early warning of power decay before VCC reaches critical threshold. |
| Operating Current | 50 µA (VCC < 3.6 V) - minimizes impact on low-power 3.3 V system standby current budgets. |
| IN Pin Reference | 1.25 V (±0.05 V) - allows precise external voltage divider design for custom sense-point monitoring. |
| Temperature Range | -40°C to +85°C - validated for industrial-grade reliability in uncontrolled ambient environments. |
Pinout & Package
DS1706SEPA is housed in an 8-pin plastic DIP (300-mil) package with through-hole mounting and industry-standard footprint. Pin assignments are fully compatible with MAX705/MAX706 family devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PBRST | Pushbutton Reset Input | Active-low, internally pulled up (40 kΩ); debounced to guarantee ≥130 ms RST pulse on release. |
| VCC | Power Supply | 1.2–5.5 V operation; powers internal comparators, watchdog, and output drivers. |
| GND | Ground Reference | Common return path for all analog and digital circuitry; must be low-impedance for noise immunity. |
| IN | Voltage Sense Input | High-impedance (≤1 µA leakage); monitors external supply via resistor divider referenced to 1.25 V bandgap. |
| NMI | Non-Maskable Interrupt Output | Active-low, open-drain; pulses ≥200 µs when IN falls below 1.25 V - signals imminent power failure. |
| ST | Strobe Input | Active-low, internally pulled up (180 kΩ); resets watchdog timer on each falling edge; must be toggled ≤1 s. |
| RST | Active-Low Reset Output | Push-pull, drives low during fault or power-up; held active ≥130 ms to ensure CPU reset completion. |
| WDS | Watchdog Status Output | Active-low, open-drain; asserts ≥130 ms if ST is not strobed before watchdog timeout expires. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Voltage Sensing | IN pin accepts user-defined sense point via resistor divider - enables early detection at upstream rail or higher-voltage source. |
| Dual-Failure Detection | Simultaneous monitoring of local VCC and remote IN voltage - prevents undetected brownouts caused by PCB trace drops or regulator faults. |
| Hardware-Debounced Pushbutton | Eliminates external RC network; guarantees clean, glitch-free reset initiation with ≥130 ms pulse regardless of button bounce. |
| Noise-Immune NMI Generation | 5 µs response + 100 µV hysteresis filters supply ripple and EMI - avoids spurious interrupts during normal operation. |
| Watchdog with Strobe Flexibility | ST accepts any microcontroller signal (address/data/control) - no dedicated clock required; supports diverse MCU architectures. |
Applications
| Industrial PLC Controller | Medical Diagnostic Equipment |
|---|---|
Use Scenario: Microcontroller-based I/O module subject to line transients and thermal cycling in factory-floor cabinets. IC Role / Device Role / Timing Role: DS1706SEPA acts as primary power supervisor - asserting RST during brownouts, generating NMI for graceful shutdown, and monitoring firmware liveness via ST. Use Value: Prevents corrupted EEPROM writes and sensor data loss by ensuring deterministic reset behavior and enabling controlled state save before power collapse. |
Use Scenario: Portable ultrasound unit with battery-backed 3.3 V rail and strict safety-critical boot validation requirements. IC Role / Device Role / Timing Role: DS1706SEPA supervises main SoC supply and triggers NMI to initiate self-test sequence prior to full boot. Use Value: Meets IEC 62304 Class B software safety requirements by providing hardware-enforced reset and watchdog coverage independent of firmware. |
| Telecom Remote Terminal Unit | Smart Energy Meter |
Use Scenario: Outdoor RTU exposed to wide temperature swings and lightning-induced surges on 3.3 V communication interface rails. IC Role / Device Role / Timing Role: DS1706SEPA monitors both local 3.3 V supply and upstream 12 V DC input via IN pin - detecting failures before they propagate to serial interfaces. Use Value: Extends field uptime by catching incipient power supply degradation early, reducing unexplained reboots by >90% in deployed units. |
Use Scenario: Revenue-grade meter with tamper-detection logic and secure bootloader requiring guaranteed reset integrity during AC mains dropout. IC Role / Device Role / Timing Role: DS1706SEPA provides synchronized RST assertion and NMI warning during zero-crossing events - enabling accurate last-read timestamping and flash write protection. Use Value: Ensures regulatory compliance (ANSI C12.20) by eliminating undetected partial writes to metrology registers during power interruption. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX706ESA | 5 V ±10% VCC trip (4.40 V typ); no IN pin; identical pinout and RST/WDS/NMI functionality. | Designed for 5 V systems only; lacks programmable voltage sensing - unsuitable for 3.3 V or multi-rail monitoring. | Select MAX706ESA only for legacy 5 V designs where IN-based early warning is unnecessary. |
| TPS3808G12DBVR | 3.3 V ±1.5% trip (3.06 V typ); fixed threshold; no NMI or watchdog; pushbutton reset support omitted. | Lower accuracy supervision only - no early-warning interrupt or software liveness checking capability. | Choose TPS3808G12DBVR when cost-sensitive 3.3 V reset-only function suffices and NMI/watchdog are handled elsewhere. |
Compared with MAX706ESA and TPS3808G12DBVR, DS1706SEPA uniquely combines 3.3 V ±10% precision supervision, programmable IN-sense, NMI early warning, and watchdog timer in one 8-pin DIP - making it irreplaceable for safety-critical or multi-rail industrial microcontroller systems requiring comprehensive fault coverage.
Availability
DS1706SEPA is available at Aetrix Electronics and suitable for industrial automation, medical diagnostics, and smart grid infrastructure requiring stable component supply, long-term lifecycle assurance, and drop-in compatibility with legacy Maxim MicroMonitor designs.
Supply support for DS1706SEPA 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.
The DS1706SEPA belongs to the MicroMonitor family - engineered specifically for robust, multi-function microprocessor supervision in harsh environments where power integrity, software reliability, and early fault detection are mission-critical.
FAQ
What is the exact VCC trip point specification for DS1706SEPA?
The DS1706SEPA has a guaranteed VCC trip point of 3.00 V (min), 3.08 V (typ), and 3.15 V (max) - corresponding to its 3.3 V ±10% monitoring specification. This value is measured under -40°C to +85°C conditions with VCC between 1.2 V and 5.5 V, and defines the voltage threshold at which the RST output is asserted during power-down.
Does DS1706SEPA support both active-high and active-low reset outputs?
No, DS1706SEPA provides only active-low reset (RST) - it does not include the *RST (active-high) output found on DS1706L or DS1706P variants. The device's ordering code "SEPA" explicitly denotes /RST and /WDS configuration, confirmed in the official Maxim ordering table.
Can the IN pin of DS1706SEPA monitor voltages higher than VCC?
Yes - the IN pin is high-impedance (≤1 µA leakage) and accepts externally divided voltages. With a 1.25 V internal reference, users can scale higher supply rails (e.g., 12 V or 24 V) using a resistor divider. However, the absolute voltage at IN must never exceed VCC, as specified in the Absolute Maximum Ratings.
What is the watchdog timeout behavior when ST is left floating?
If ST is left floating, its internal 180 kΩ pull-up holds it high, preventing strobe transitions. The watchdog timer starts counting upon RST deassertion and times out after 1.0–2.2 s, driving WDS low for ≥130 ms. This failsafe behavior ensures detection of missing or stalled strobe signals in deployed systems.
Is DS1706SEPA pin-compatible with MAX706 devices?
Yes - DS1706SEPA is explicitly documented as pin-compatible with MAX705/MAX706 in 8-pin DIP, SOIC, and µSOP packages. Pin functions, electrical characteristics, and timing parameters align directly, enabling drop-in replacement in existing layouts without PCB modification.
DS1706SEPA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- MicroMonitor™
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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:
- Through Hole
- Supplier Device Package:
- 8-PDIP
DS1706SEPA FAQ
1.How can I place an order for DS1706SEPA through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1706SEPA 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 DS1706SEPA reliable?
The price and inventory of DS1706SEPA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1706SEPA is usually 5 days.
3.What payment methods are accepted for DS1706SEPA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1706SEPA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1706SEPA?
DS1706SEPA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1706SEPA 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 DS1706SEPA?
For technical support, including DS1706SEPA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1706SEPA requirements.
6.How does Aetrix verify that DS1706SEPA is sourced from the original manufacturer or authorized distributors?
All DS1706SEPA 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 DS1706SEPA meets industry standards.
7.What is the process for return or replacement of DS1706SEPA?
All DS1706SEPA units undergo pre-shipment inspection (PSI). If there is an issue with DS1706SEPA, 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 DS1706SEPA part is unused and in its original packaging.
Return procedure for DS1706SEPA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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