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Analog Devices Inc./Maxim Integrated DS1706EUA/T&R
- Part No.:
- DS1706EUA/T&R
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
DS1706EUA/T&R.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:1,676
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Product details
Overview
DS1706EUA/T&R from Maxim Integrated is a 5.0V ±10% supply voltage supervisor IC with active-low reset output, watchdog timer, non-maskable interrupt, and pushbutton reset debouncing - designed for microprocessor monitoring in industrial embedded systems requiring reliable power-up/power-down sequencing and fault recovery. It delivers 130ms minimum reset pulse width, 1s watchdog timeout, and operates across -40°C to +85°C.
For engineers reviewing the DS1706EUA/T&R datasheet, DS1706EUA/T&R pinout, DS1706EUA/T&R application, or DS1706EUA/T&R equivalent, key selection considerations include VCC trip point (4.25–4.50V), RST timing (130–285ms), NMI early-warning capability, WDS watchdog status signaling, and µSOP-8 package compatibility with legacy MAX705/MAX706 designs.
Technical Context
The DS1706EUA/T&R integrates three independent monitoring functions: precision VCC supervision with hysteresis, user-configurable IN-pin voltage sensing for upstream power rail monitoring, and a 1-second watchdog timer triggered by ST input strobes. Its comparator-based power detection uses an internal 1.25V bandgap reference and supports both /RST and /WDS outputs.
It implements hardware-level system safety via NMI generation at voltage decay onset (200µs pulse, 100µV hysteresis), guarantees 130ms reset assertion on power-up and pushbutton release, and provides internal pull-ups (40kΩ on PBRST, 180kΩ on ST) to simplify external circuitry - all within a single 8-pin µSOP footprint.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Trip Point | 4.25V (min) to 4.50V (max); ensures reset activation before 5V system brownout |
| Reset Pulse Width | 130–285ms; guarantees sufficient time for processor and power supply stabilization |
| Watchdog Timeout | 1.0–2.2s; detects software hang when ST strobe fails to toggle within interval |
| NMI Pulse Width | ≥200µs; provides early warning of impending power failure without masking |
| Operating Temp | -40°C to +85°C; validated for industrial-grade embedded deployment |
| Supply Current | 60µA max (VCC < 5.5V); enables low-power always-on monitoring |
| IN Pin Trip Voltage | 1.20–1.30V; allows flexible external voltage divider configuration for custom sense points |
Pinout & Package
DS1706EUA/T&R is housed in an 8-pin µSOP (118-mil) package, pin-compatible with MAX705/MAX706 in DIP, SOIC, and µSOP footprints. The package supports surface-mount reflow assembly and meets industrial thermal requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PBRST | Pushbutton Reset Input | Active-low, internally pulled up (40kΩ); debounced to generate ≥130ms /RST pulse on release |
| VCC | Power Supply Input | Primary 5.0V supply input; monitored for ±10% tolerance violation |
| GND | Ground Reference | System ground return for all analog and digital circuitry |
| IN | External Sense Input | High-impedance input referenced to 1.25V internal bandgap; enables custom voltage monitoring |
| NMI | Non-Maskable Interrupt Output | Active-low pulse (≥200µs) on upstream supply decay; used for early fault response |
| ST | Watchdog Strobe Input | Active-low input (internally pulled up 180kΩ); resets 1s watchdog timer on each falling edge |
| RST | Active-Low Reset Output | Drives microprocessor /RESET; held active ≥130ms after power-up or fault condition |
| WDS | Watchdog Status Output | Active-low open-drain output indicating watchdog timeout; can drive PBRST for auto-recovery |
Key Features
| Feature | Design Value |
|---|---|
| Triple-function supervision | Simultaneous VCC monitoring, external voltage sensing (IN), and watchdog timer - eliminates need for discrete supervisors |
| Configurable reset threshold | Factory-set 5V ±10% trip point (DS1706 variant) enables precise match to 5V system tolerances |
| Early-warning NMI | Generates non-maskable interrupt before reset activation, allowing firmware-controlled graceful shutdown |
| Hardware-debounced PBRST | Eliminates external RC filtering; guarantees clean 130ms reset pulse regardless of switch bounce |
| µSOP-8 footprint compatibility | Direct replacement for MAX705/MAX706 in space-constrained industrial PCBs without layout change |
Applications
| Industrial PLC Controller | Medical Diagnostic Equipment |
|---|---|
Use Scenario: Continuous operation in factory-floor programmable logic controllers where unexpected power transients may corrupt firmware execution. IC Role / Device Role / Timing Role: DS1706EUA/T&R acts as primary power and software health monitor, asserting /RST during brownout and generating NMI for pre-failure logging. Use Value: Prevents corrupted state retention by enforcing hard reset before VCC drops below 4.25V, while NMI enables last-cycle data save to nonvolatile memory. |
Use Scenario: Life-critical imaging systems requiring deterministic boot integrity and runtime fault detection. IC Role / Device Role / Timing Role: DS1706EUA/T&R supervises main 5V rail and monitors FPGA configuration voltage via IN pin, triggering /RST if either fails. Use Value: Guarantees safe initialization sequence and runtime watchdog coverage - meeting IEC 62304 Class C software safety requirements. |
| Telecom Remote Radio Unit | Energy Meter Data Concentrator |
Use Scenario: Outdoor base station radios exposed to wide temperature swings and intermittent AC line disturbances. IC Role / Device Role / Timing Role: DS1706EUA/T&R provides dual-rail monitoring (VCC + IN-sensed DC/DC output) and generates NMI for thermal throttling coordination. Use Value: Enables predictive maintenance alerts via NMI-triggered telemetry before full reset occurs, minimizing service downtime. |
Use Scenario: Smart grid AMI concentrators operating unattended for years in utility substations. IC Role / Device Role / Timing Role: DS1706EUA/T&R watches microcontroller execution via ST strobe and asserts /RST on watchdog timeout caused by firmware lockup. Use Value: Ensures autonomous recovery from communication stack hangs without field technician intervention, maintaining meter data continuity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX706ESA | Same 5V ±10% trip point, identical µSOP-8 pinout, but lacks NMI output and IN sense input | Supports basic reset + watchdog only; no early-warning capability or external rail monitoring | Select when NMI and IN functionality are unnecessary and cost reduction is prioritized |
| TPS3808G15DBVR | 1.5V fixed threshold (not adjustable), no NMI, no IN pin, but offers programmable reset delay (0–10s) and lower quiescent current (1.1µA) | Designed for ultra-low-power battery-backed systems; unsuitable for multi-rail or early-warning use cases | Choose only for simple 5V supply monitoring where extended delay and minimal ICC outweigh missing features |
Compared with MAX706ESA and TPS3808G15DBVR, DS1706EUA/T&R uniquely combines VCC supervision, external voltage sensing, NMI generation, and watchdog in one µSOP-8 device - making it the only option among the three that supports both fault prediction and multi-point power integrity verification.
Availability
DS1706EUA/T&R is available at Aetrix Electronics and suitable for industrial control systems, medical diagnostics equipment, telecom infrastructure, and smart energy metering applications requiring stable component supply, long-term lifecycle support, and guaranteed traceability.
Supply support for DS1706EUA/T&R 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 DS1706EUA/T&R belongs to the MicroMonitor™ family - engineered specifically for robust microprocessor supervision in harsh environments where deterministic reset behavior, early fault detection, and watchdog reliability are mission-critical.
FAQ
What is the exact VCC trip point range for DS1706EUA/T&R?
The DS1706EUA/T&R has a factory-trimmed VCC trip point of 4.25V (minimum) to 4.50V (maximum), corresponding to a nominal 5.0V supply with ±10% tolerance. This range is specified over the full -40°C to +85°C operating temperature and ensures reset activation before downstream logic becomes unreliable. The DS1706EUA/T&R does not support user adjustment of this threshold.
Does DS1706EUA/T&R provide both active-high and active-low reset outputs?
No, DS1706EUA/T&R provides only an active-low reset output (/RST). The datasheet confirms that DS1706 variants (including DS1706EUA/T&R) feature /RST and /WDS outputs, whereas active-high RST is exclusive to DS1706L and DS1706P variants. This distinction is clearly defined in the PIN DESCRIPTION section and ORDERING INFORMATION table.
Can DS1706EUA/T&R monitor a voltage rail other than its own VCC supply?
Yes, DS1706EUA/T&R can monitor an external voltage rail using the IN pin, which compares the applied voltage against an internal 1.25V reference. By configuring an external resistor divider, users can scale higher voltages (e.g., 12V or 24V) down to the 1.25V trip point - enabling upstream power rail supervision independent of the DS1706EUA/T&R's 5V VCC supply.
What is the watchdog timeout accuracy and temperature dependence of DS1706EUA/T&R?
The DS1706EUA/T&R watchdog timeout is specified as 1.0s (minimum) to 2.2s (maximum) over -40°C to +85°C, with typical value 1.6s. This variation arises from process and temperature effects on the internal RC oscillator. The timeout is tested at 4.5V for 5V devices, and no external calibration or trimming is supported - design margin must accommodate the full 1.0–2.2s range.
Is DS1706EUA/T&R pin-compatible with MAX706ESA, and are there any layout considerations?
Yes, DS1706EUA/T&R is fully pin-compatible with MAX706ESA in the 8-pin µSOP (118-mil) package - same pin count, numbering, and function mapping. No PCB changes are required for drop-in replacement. However, note that DS1706EUA/T&R adds NMI and IN functionality absent in MAX706ESA, so unused pins on the legacy design remain floating or may be left unconnected without impact.
DS1706EUA/T&R 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:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.4V
- 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
DS1706EUA/T&R FAQ
1.How can I place an order for DS1706EUA/T&R through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1706EUA/T&R 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 DS1706EUA/T&R reliable?
The price and inventory of DS1706EUA/T&R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1706EUA/T&R is usually 5 days.
3.What payment methods are accepted for DS1706EUA/T&R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1706EUA/T&R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1706EUA/T&R?
DS1706EUA/T&R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1706EUA/T&R 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 DS1706EUA/T&R?
For technical support, including DS1706EUA/T&R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1706EUA/T&R requirements.
6.How does Aetrix verify that DS1706EUA/T&R is sourced from the original manufacturer or authorized distributors?
All DS1706EUA/T&R 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 DS1706EUA/T&R meets industry standards.
7.What is the process for return or replacement of DS1706EUA/T&R?
All DS1706EUA/T&R units undergo pre-shipment inspection (PSI). If there is an issue with DS1706EUA/T&R, 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 DS1706EUA/T&R part is unused and in its original packaging.
Return procedure for DS1706EUA/T&R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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