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Analog Devices Inc./Maxim Integrated DS1706REUA
- Part No.:
- DS1706REUA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
DS1706REUA.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:2,320
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Product details
Overview
DS1706REUA from Maxim Integrated is a 3.3V ±20% supply voltage supervisor IC with active-low reset (/RST), watchdog status output (/WDS), and non-maskable interrupt (NMI) for microprocessor systems. It monitors VCC, detects power transients, provides pushbutton reset debouncing, and delivers 130 ms minimum reset pulse width. Used in embedded controllers requiring reliable power-up/power-down sequencing and early power-fail warning.
For engineers reviewing the DS1706REUA datasheet, DS1706REUA pinout, DS1706REUA application, or DS1706REUA equivalent, key selection criteria include its 3.3V ±20% trip point (VCCTP = 2.55–2.70 V), industrial temperature range (−40°C to +85°C), µSOP-8 package, watchdog timeout of 1.0–2.2 s, and compatibility with 3.0V system rails.
Technical Context
The DS1706REUA integrates three independent monitoring functions: precision VCC detection using an internal bandgap reference and comparator, pushbutton reset input (PBRST) with hardware debouncing and guaranteed 130 ms active-low reset pulse, and a 1-second watchdog timer triggered by ST strobe input transitions. Its IN pin supports external voltage sensing at user-defined points via resistor divider.
It generates dual-level fault response: NMI asserts for early warning (200 µs pulse, 100 µV hysteresis) when monitored supply decays toward trip point, while /RST activates only after VCC falls below VCCTP and remains asserted ≥130 ms during power-up recovery. All outputs are CMOS-compatible with IOL = 10 mA and IOH = 350 µA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Trip Point | 2.55–2.70 V (3.3V ±20% monitor for 3.0V systems) |
| Reset Pulse Width | 130–285 ms (ensures stable processor initialization after power recovery) |
| Watchdog Timeout | 1.0–2.2 s (configurable via ST input timing; resets on high-to-low transition) |
| NMI Pulse Width | ≥200 µs (provides early power-fail warning before reset assertion) |
| Operating Current | 50 µA (at VCC < 3.6V; enables low-power system monitoring) |
| Temperature Range | −40°C to +85°C (industrial-grade operation without derating) |
| IN Trip Voltage | 1.20–1.30 V (precision sense threshold for external voltage divider networks) |
Pinout & Package
DS1706REUA is housed in an 8-pin µSOP (118-mil) package, pin-compatible with DS1706 variants in DIP-8 and SOIC-8. The package is surface-mount, lead-free compatible, and rated for reflow per JEDEC J-STD-020.
| 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 | 3.3V supply input; powers internal comparators, timer, and outputs |
| GND | Ground Reference | Return path for all analog and digital circuitry; must be low-impedance |
| IN | External Sense Input | High-impedance (5 pF), referenced to 1.25 V internal bandgap; accepts divided voltage from upstream rail |
| NMI | Non-Maskable Interrupt Output | Active-low open-drain; pulses ≥200 µs when IN falls below 1.25 V (with 100 µV hysteresis) |
| ST | Strobe Input | High-to-low transition resets watchdog timer; internally pulled up (180 kΩ) |
| /RST | Active-Low Reset Output | CMOS-compatible, drives low during VCC fault or PBRST activation; held ≥130 ms |
| /WDS | Watchdog Status Output | Active-low open-drain; asserts low for ≥130 ms if ST not strobed within timeout window |
Key Features
| Feature | Design Value |
|---|---|
| Triple-function supervision | Simultaneous VCC monitoring, pushbutton reset control, and watchdog timer-reduces BOM count vs. discrete solutions |
| Configurable reset polarity | DS1706REUA provides /RST only (active-low), enabling direct interface with processors requiring active-low reset assertion |
| Early-warning NMI | Generates non-maskable interrupt before reset activation, allowing firmware-controlled graceful shutdown |
| 3.0V system support | 2.55–2.70 V trip point matches 3.0V nominal rails with ±20% tolerance-no external resistors needed for basic VCC monitoring |
| µSOP-8 footprint | 118-mil body width enables high-density PCB layouts; pinout identical to industry-standard MAX705/MAX706 |
Applications
| Industrial PLC Controller | Medical Diagnostic Device |
|---|---|
Use Scenario: Power interruption during real-time sensor data acquisition triggers immediate fault logging and safe state entry. IC Role / Device Role / Timing Role: DS1706REUA monitors 3.3V logic rail and asserts /RST to halt CPU execution before brownout corrupts memory writes. Use Value: 130 ms guaranteed reset hold time ensures flash write completion and register save before power collapse. | Use Scenario: Battery-backed ECG module must maintain data integrity during AC adapter disconnection or surge events. IC Role / Device Role / Timing Role: DS1706REUA's NMI output alerts firmware of impending power loss, initiating backup RAM save and display freeze prior to /RST assertion. Use Value: 200 µs NMI pulse with 100 µV hysteresis rejects line noise while providing ≥5 µs advance warning before reset activation. |
| Automotive Infotainment Head Unit | Network Edge Router |
Use Scenario: Cold-cranking voltage dip below 3.0V during engine start must not cause MCU lockup or undefined behavior. IC Role / Device Role / Timing Role: DS1706REUA supervises 3.3V domain and forces controlled reset via /RST, synchronized with power supply stabilization. Use Value: −40°C to +85°C rating and 2.55–2.70 V trip point ensure reliable operation across automotive thermal and voltage profiles. | Use Scenario: FPGA-based packet processing engine requires deterministic restart after power glitch on auxiliary 3.3V rail. IC Role / Device Role / Timing Role: DS1706REUA's watchdog function monitors ST signal derived from FPGA clock enable, preventing hang due to firmware deadlock. Use Value: 1.0–2.2 s programmable timeout allows tuning to FPGA boot sequence duration without false triggers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX706RESA | Same 3.3V ±20% trip point, /RST, /WDS, and µSOP-8 package; identical pinout and AC/DC specs | No functional difference; MAX706RESA is second-source offering with identical timing and drive strength | Select MAX706RESA for dual-sourcing flexibility without layout or firmware changes |
| TPS3808G18DBVR | 3.3V ±2% accuracy (tighter tolerance), no NMI output, no watchdog timer, SOT-23-6 package (different pin count and layout) | Lacks early-warning interrupt and watchdog; suitable only for basic reset-only use cases | Choose TPS3808G18DBVR only if NMI and watchdog functions are unused and tighter trip accuracy is required |
Compared with MAX706RESA, DS1706REUA offers identical functionality and drop-in compatibility; versus TPS3808G18DBVR, DS1706REUA provides critical NMI and watchdog features essential for fail-safe embedded systems but requires µSOP-8 routing instead of SOT-23-6.
Availability
DS1706REUA is available at Aetrix Electronics and suitable for industrial PLC controllers, medical diagnostic devices, automotive infotainment head units, network edge routers, and battery-backed data loggers requiring stable component supply across extended temperature ranges.
Supply support for DS1706REUA 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 demanding industrial, medical, and communications applications.
The DS1706REUA belongs to the MicroMonitor™ family of voltage supervisors, engineered specifically for robust microprocessor reset, watchdog, and power-fail warning in resource-constrained embedded systems.
FAQ
What is the exact VCC trip point range for DS1706REUA?
The DS1706REUA has a guaranteed VCC trip point (VCCTP) of 2.55 V (min), 2.63 V (typ), and 2.70 V (max), corresponding to 3.3V ±20% monitoring for 3.0V system rails. This range is validated across −40°C to +85°C and ensures reliable reset assertion before logic corruption occurs in 3.0V microcontroller domains.
Does DS1706REUA provide both active-high and active-low reset outputs?
No, DS1706REUA provides only active-low reset (/RST) and active-low watchdog status (/WDS). Unlike DS1706LEUA or DS1706PEUA, it does not include the active-high RST output. This simplifies interface design for MCUs requiring only /RST signaling and reduces pin count requirements.
How does the DS1706REUA watchdog timer interact with the /RST signal?
The DS1706REUA watchdog timer starts timing only after /RST becomes inactive (i.e., after power-up stabilization). If the ST input is not strobed before timeout (1.0–2.2 s), /WDS goes low for ≥130 ms-but /RST remains unaffected unless VCC drops below VCCTP or PBRST is asserted. The two functions operate independently.
Can DS1706REUA monitor voltages higher than 3.3V using the IN pin?
Yes, DS1706REUA's IN pin accepts externally divided voltages up to VCC (3.3V max). Using a resistor divider (e.g., R1 = 26 kΩ, R2 = 10 kΩ), it can monitor a 11.88 V supply while maintaining 1.25 V at IN. The internal 1.20–1.30 V trip point ensures accurate sensing of upstream rails before VCC collapse.
Is DS1706REUA pin-compatible with MAX706 series devices?
Yes, DS1706REUA is fully pin-compatible with MAX706 variants in µSOP-8 (U), SOIC-8 (S), and DIP-8 (P) packages. Pin assignments-including /RST, /WDS, NMI, ST, PBRST, IN, VCC, and GND-are identical, enabling direct replacement without PCB modification.
DS1706REUA 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:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.63V
- 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
DS1706REUA FAQ
1.How can I place an order for DS1706REUA through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1706REUA 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 DS1706REUA reliable?
The price and inventory of DS1706REUA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1706REUA is usually 5 days.
3.What payment methods are accepted for DS1706REUA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1706REUA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1706REUA?
DS1706REUA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1706REUA 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 DS1706REUA?
For technical support, including DS1706REUA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1706REUA requirements.
6.How does Aetrix verify that DS1706REUA is sourced from the original manufacturer or authorized distributors?
All DS1706REUA 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 DS1706REUA meets industry standards.
7.What is the process for return or replacement of DS1706REUA?
All DS1706REUA units undergo pre-shipment inspection (PSI). If there is an issue with DS1706REUA, 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 DS1706REUA part is unused and in its original packaging.
Return procedure for DS1706REUA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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