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Analog Devices Inc./Maxim Integrated DS1706ESA+
- Part No.:
- DS1706ESA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
DS1706ESA+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:238
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Product details
Overview
DS1706ESA+ from Maxim Integrated is a 5.0V ±10% microprocessor supervisory circuit that monitors VCC, provides pushbutton reset control, and implements a 1-second watchdog timer with WDS output. It delivers active-low reset (RST), non-maskable interrupt (NMI), and strobe input (ST) for embedded systems requiring reliable power-up sequencing and fault recovery in industrial environments.
For engineers reviewing the DS1706ESA+ datasheet, DS1706ESA+ pinout, DS1706ESA+ application, or DS1706ESA+ equivalent, key selection criteria include its 4.25V–4.50V VCC trip point, 130ms minimum reset pulse width, 1.25V IN-sense reference, -40°C to +85°C operation, and compatibility with 8-pin SOIC footprint.
Technical Context
The DS1706ESA+ integrates three independent monitoring functions: precision VCC threshold detection using an internal bandgap reference and comparator, debounced pushbutton reset with guaranteed 130ms active-low pulse, and a monostable watchdog timer triggered by ST transitions with 1.0–2.2s timeout window.
Its NMI output provides early warning of power decay via high-impedance IN pin sensing (1.20–1.30V trip), while RST remains asserted for ≥130ms after VCC recovery. The device supports system-level shutdown coordination through NMI-to-PBRST feedback and uses internal pull-ups (40kΩ on PBRST, 180kΩ on ST) for robust noise immunity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Trip Point | 4.25V–4.50V (±10% for 5.0V systems); ensures reset activation before microprocessor brownout |
| Reset Pulse Width | ≥130ms minimum; guarantees stable power and processor initialization during power-up/recovery |
| Watchdog Timeout | 1.0–2.2s; detects software lockup when ST input fails to toggle within interval |
| IN Sense Reference | 1.20–1.30V; enables user-configurable voltage monitoring via external resistor divider |
| Operating Temp | -40°C to +85°C; validated for industrial-grade embedded control and automation equipment |
| Supply Current | 60μA max at VCC < 5.5V; enables low-power always-on supervision without burdening supply |
| NMI Pulse Width | ≥200μs; provides sufficient timing margin for interrupt service routine entry |
Pinout & Package
DS1706ESA+ is housed in an 8-pin SOIC (150-mil) package, RoHS-compliant and lead-free per Maxim's ordering convention (+ suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PBRST | Pushbutton Reset Input | Active-low, internally pulled up to VCC (40kΩ); debounced to generate ≥130ms RST pulse on release |
| VCC | Power Supply | Primary 5.0V supply input; monitored for out-of-tolerance condition triggering RST/NMI |
| GND | Ground | Reference node for all analog comparators and digital outputs; must be low-impedance |
| IN | Voltage Sense Input | High-impedance (≤1μA leakage); accepts divided-down voltage for early power-fail detection at 1.25V threshold |
| NMI | Non-Maskable Interrupt Output | Open-drain, active-low; pulses ≥200μs when IN falls below 1.25V, enabling preemptive shutdown |
| ST | Strobe Input | Active-high, internally pulled up (180kΩ); resets watchdog timer on each rising edge; requires toggling ≤1s |
| RST | Reset Output | Active-low, open-drain; held low ≥130ms after VCC recovery or PBRST release |
| WDS | Watchdog Status Output | Active-low, open-drain; asserts for ≥130ms if ST not strobed before watchdog timeout |
Key Features
| Feature | Design Value |
|---|---|
| Triple-function supervision | Combines VCC monitoring, pushbutton reset, and watchdog timer in single 8-pin SOIC-eliminates discrete BOM components |
| Configurable sense point | IN pin referenced to precise 1.25V internal bandgap allows monitoring of any DC rail via resistor divider |
| Noise-immune NMI generation | 5μs minimum IN low-time requirement and 100μV hysteresis prevent false interrupts from supply ripple |
| Guaranteed reset timing | 130ms minimum RST assertion ensures reliable microprocessor reset across full temperature and voltage range |
| Pin-compatible upgrade path | Direct replacement for MAX705/MAX706 in DIP/SOIC/μSOP footprints-no PCB redesign required |
Applications
| Industrial PLC Controller | Medical Diagnostic Equipment |
|---|---|
Use Scenario: Continuous operation in factory-floor programmable logic controllers where power transients and EMI risk firmware hangs. IC Role / Device Role / Timing Role: Supervisory IC providing VCC monitoring, NMI-triggered safe state entry, and watchdog-enforced software health check. Use Value: Prevents uncontrolled execution during brownout; enables deterministic fail-safe response within 200μs of sensed voltage decay. | Use Scenario: Life-critical imaging subsystems requiring guaranteed boot integrity and runtime fault detection. IC Role / Device Role / Timing Role: System-level reset manager coordinating power-up sequencing, pushbutton-initiated calibration reset, and watchdog supervision of image acquisition firmware. Use Value: Ensures 130ms minimum reset hold time for FPGA configuration stability and eliminates silent software crashes via 1s watchdog timeout. |
| Telecom Base Station Control Card | Smart Energy Meter |
Use Scenario: Remote outdoor base station control cards exposed to wide temperature swings and intermittent AC line disturbances. IC Role / Device Role / Timing Role: Power supervisor generating early NMI warning before VCC collapse and asserting RST only upon confirmed undervoltage. Use Value: Extends system uptime by enabling graceful data save and state preservation during slow power decay-supported by 1.25V IN reference accuracy. | Use Scenario: ANSI C12.20-certified electricity meters needing tamper-resistant reset behavior and long-term reliability over 15-year field life. IC Role / Device Role / Timing Role: Supervisory circuit enforcing secure boot via 130ms reset pulse and detecting meter firmware stalls using ST-driven watchdog. Use Value: Meets IEC 62056 requirements for deterministic reset timing and provides traceable fault logging via WDS status flag. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX706ESA+ | Same 5V ±10% VCC trip (4.25–4.50V), identical 8-pin SOIC package and pinout; lacks WDS output and IN-sense flexibility | No dedicated watchdog status flag; no user-configurable voltage monitoring via IN pin | Select MAX706ESA+ only if watchdog status reporting and external rail monitoring are unnecessary |
| TPS3823-50DBVR | TI part with 5.0V ±2% trip (4.90–5.10V), fixed reset timeout (200ms), no NMI or IN sense; SOT-23-6 package | Smaller footprint but no early-warning interrupt or programmable sense capability | Choose TPS3823-50DBVR for space-constrained designs where only basic reset is needed and higher trip accuracy suffices |
Compared with MAX706ESA+, DS1706ESA+ adds WDS output and IN-sense functionality for enhanced system diagnostics; versus TPS3823-50DBVR, it offers wider trip tolerance, NMI signaling, and flexible rail monitoring-critical for industrial fault recovery.
Availability
DS1706ESA+ is available at Aetrix Electronics and suitable for industrial automation, medical electronics, telecom infrastructure, and smart metering applications requiring stable component supply and long-term lifecycle support.
Supply support for DS1706ESA+ 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 high-reliability ICs for industrial, automotive, communications, and computing markets.
The DS1706ESA+ belongs to Maxim's MicroMonitor™ family-engineered specifically for robust microprocessor supervision in harsh environments where power integrity, deterministic reset timing, and early fault detection are mission-critical.
FAQ
What is the exact VCC trip point range for DS1706ESA+?
The DS1706ESA+ has a guaranteed VCC trip point range of 4.25V to 4.50V, corresponding to ±10% tolerance for nominal 5.0V systems. This specification is validated across the full industrial temperature range (-40°C to +85°C) and ensures reset assertion occurs before most 5V microprocessors enter undefined operating states. The DS1706ESA+ datasheet specifies VCCTP = 4.25/4.40/4.50V (min/typ/max) under recommended operating conditions.
Does DS1706ESA+ provide both active-low and active-high reset outputs?
No, DS1706ESA+ provides only an active-low reset output (RST). Unlike variants such as DS1706LESA+ (which offers active-high RST), the DS1706ESA+ variant is designated for /RST and /WDS functionality per Maxim's ordering table. Its RST pin is open-drain and requires an external pull-up; no complementary *RST signal is present on this specific part number.
Can DS1706ESA+ monitor voltages other than VCC?
Yes, DS1706ESA+ can monitor secondary rails via its IN pin, which references a precise 1.25V internal bandgap. By connecting an external resistor divider between the target voltage rail and ground, users configure the trip point-for example, a 4.5V rail monitored with R1=26kΩ and R2=10kΩ yields VSENSE = 1.25 × (1 + R1/R2) = 4.50V. The DS1706ESA+ datasheet provides the full design equation and maximum allowable input voltage derivation.
What is the watchdog timeout behavior of DS1706ESA+?
The DS1706ESA+ watchdog timer times out between 1.0s and 2.2s after the last ST input transition, with typical timeout at 1.6s. Upon timeout, WDS asserts low for ≥130ms. The timer starts counting only after RST becomes inactive (i.e., after power-up stabilization), and each high-to-low ST edge resets the counter. This behavior is verified in the DS1706ESA+ AC Electrical Characteristics table under parameter tTD.
Is DS1706ESA+ pin-compatible with MAX705/MAX706?
Yes, DS1706ESA+ is explicitly documented as pin-compatible with MAX705/MAX706 in 8-pin SOIC, 8-pin DIP, and 8-pin μSOP packages. Pin assignments-including PBRST, VCC, GND, IN, NMI, ST, RST, and WDS-match identically across these families. This allows direct substitution without PCB layout changes, though designers must verify functional equivalence (e.g., DS1706ESA+ includes WDS and IN sense, while MAX706 lacks WDS).
DS1706ESA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- MicroMonitor™
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- 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-SOIC
DS1706ESA+ FAQ
1.How can I place an order for DS1706ESA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1706ESA+ 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 DS1706ESA+ reliable?
The price and inventory of DS1706ESA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1706ESA+ is usually 5 days.
3.What payment methods are accepted for DS1706ESA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1706ESA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1706ESA+?
DS1706ESA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1706ESA+ 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 DS1706ESA+?
For technical support, including DS1706ESA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1706ESA+ requirements.
6.How does Aetrix verify that DS1706ESA+ is sourced from the original manufacturer or authorized distributors?
All DS1706ESA+ 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 DS1706ESA+ meets industry standards.
7.What is the process for return or replacement of DS1706ESA+?
All DS1706ESA+ units undergo pre-shipment inspection (PSI). If there is an issue with DS1706ESA+, 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 DS1706ESA+ part is unused and in its original packaging.
Return procedure for DS1706ESA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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