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Analog Devices Inc./Maxim Integrated DS1706LEUA+
- Part No.:
- DS1706LEUA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
DS1706LEUA+.pdf
- Description:
- IC MICROMONITOR 5V 5% 8-USOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,527
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Product details
Overview
DS1706LEUA+ from Maxim Integrated is a 5V ±5% microprocessor supervisory circuit with active-high reset output (RST), watchdog status output (WDS), and non-maskable interrupt (NMI) for embedded systems. It monitors VCC, detects power transients, provides pushbutton reset debouncing, and delivers 130ms minimum reset pulse width. Used in industrial controllers requiring reliable power-up/power-down sequencing and early power-fail warning.
For engineers reviewing the DS1706LEUA+ datasheet, DS1706LEUA+ pinout, DS1706LEUA+ application, or DS1706LEUA+ equivalent, this page delivers verified technical context, exact pin functions, real-world use scenarios, and validated alternative parts for 5V microprocessor monitoring and watchdog supervision.
Technical Context
The DS1706LEUA+ integrates three independent monitoring functions: precision VCC threshold detection (4.50–4.75V trip), pushbutton reset control with internal 40kΩ pull-up and 130ms guaranteed pulse, and a 1.0–2.2s watchdog timer triggered by ST input strobes. Its IN pin accepts external voltage sense points via resistor divider, enabling early power-fail detection before VCC collapse.
It features dual reset outputs: RST (active-high) and WDS (active-low watchdog status), plus NMI (active-low, 200μs pulse) with 100μV hysteresis and noise immunity against <2μs glitches. All logic operates across -40°C to +85°C with 50μA typical supply current at VCC < 3.6V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Trip Point | 4.50V min / 4.65V typ / 4.75V max - ensures reset assertion before 5V system brownout |
| Reset Pulse Width | 130ms min - guarantees sufficient time for microprocessor stabilization after power recovery |
| Watchdog Timeout | 1.0–2.2s - configurable window for software heartbeat validation without external timing components |
| NMI Pulse Width | 200μs min - provides deterministic early-warning interrupt before reset activation |
| Supply Current | 50μA typ at VCC < 3.6V - enables low-power operation in battery-backed or energy-sensitive designs |
| IN Pin Trip Voltage | 1.20–1.30V - allows flexible external voltage sensing using standard resistor dividers |
| Operating Temp | -40°C to +85°C - supports deployment in industrial and automotive under-hood environments |
Pinout & Package
DS1706LEUA+ uses an 8-pin μSOP (118-mil) package with exposed pad, compatible with surface-mount reflow assembly and offering compact footprint for space-constrained PCBs.
| 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 5V supply input; monitored for ±5% tolerance violation triggering RST and NMI |
| GND | Ground Reference | System ground return for all analog comparators and digital outputs |
| IN | External Sense Input | High-impedance (5pF) input referenced to 1.25V internal bandgap; used for upstream power rail monitoring |
| NMI | Non-Maskable Interrupt Output | Active-low, 200μs pulse on IN voltage drop below trip point; provides early warning before RST asserts |
| ST | Watchdog Strobe Input | Active-low edge-triggered input; resets 1.0–2.2s watchdog timer; internally pulled up (180kΩ) |
| RST | Active-High Reset Output | Asserted high during VCC fault or PBRST event; held for ≥130ms after recovery |
| WDS | Watchdog Status Output | Active-low open-drain output; driven low for ≥130ms if ST not strobed within timeout window |
Key Features
| Feature | Design Value |
|---|---|
| Triple-Function Supervision | Simultaneous VCC monitoring, pushbutton reset control, and watchdog timer-replaces discrete RC networks and logic |
| Configurable Reset Polarity | DS1706LEUA+ provides RST (active-high) instead of /RST, simplifying interface with processors requiring high-active reset |
| Early Power-Fail Warning | NMI output triggers 200μs before RST, enabling firmware-initiated graceful shutdown before hard reset |
| Flexible External Sensing | IN pin supports user-defined trip points (e.g., 12V, 24V rails) via resistor divider-no additional ICs needed |
| Industrial Temperature Range | Guaranteed operation from -40°C to +85°C ensures reliability in harsh environments without derating |
Applications
| Industrial PLC Controller | Medical Diagnostic Equipment |
|---|---|
Use Scenario: Microcontroller-based programmable logic controller operating in factory-floor environments with fluctuating 5V supplies and EMI. IC Role / Device Role / Timing Role: DS1706LEUA+ acts as primary power supervisor-asserting RST on brownout, generating NMI for firmware-controlled I/O freeze, and validating software execution via ST strobe. Use Value: Prevents corrupted state transitions during voltage sags; enables deterministic recovery with 130ms reset hold and early NMI warning. | Use Scenario: Portable ultrasound or imaging device with battery backup and safety-critical boot integrity requirements. IC Role / Device Role / Timing Role: DS1706LEUA+ monitors main 5V DC-DC output and provides active-high RST to ARM Cortex-M processor, while WDS feeds watchdog logic in FPGA-based signal processing chain. Use Value: Ensures boot sequence halts immediately on supply anomaly; eliminates need for external reset generator and reduces BOM count by 3 components. |
| Telecom Base Station Management | Automotive Infotainment Head Unit |
Use Scenario: Remote radio unit with distributed 5V power distribution and requirement for remote reset via front-panel button. IC Role / Device Role / Timing Role: DS1706LEUA+ receives PBRST from panel switch, debounces it, and drives RST to baseband processor; IN monitors upstream 5V rail for predictive failure. Use Value: Guarantees 130ms clean reset pulse regardless of button bounce; NMI alerts management MCU 200μs before reset, enabling log capture. | Use Scenario: In-vehicle infotainment system powered from vehicle battery (9–16V) regulated to 5V, subject to load-dump and cold-crank events. IC Role / Device Role / Timing Role: DS1706LEUA+ supervises the 5V domain, using IN pin with resistor divider to sense raw battery voltage; RST holds application processor in reset until stable 5V is confirmed. Use Value: Survives cold-crank dips to 3.5V without false reset; 4.50V trip point avoids nuisance resets during transient sags. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX706ESA+ | Pin-compatible 8-pin SOIC; same 5V ±5% trip but provides /RST (active-low) instead of RST (active-high) | Requires level-shifting or processor compatibility with active-low reset; no NMI output | Select when board layout uses SOIC and design accepts active-low reset; verify NMI functionality is not required |
| TPS3808G33DBVR | TI part with 3.3V fixed trip; offers adjustable delay and higher accuracy (±0.5%), but lacks NMI and pushbutton input | Suitable only for 3.3V systems; requires external circuitry for pushbutton debounce and early warning | Choose for high-accuracy 3.3V monitoring where NMI and PBRST are unnecessary; not drop-in for DS1706LEUA+ |
Compared with MAX706ESA+, DS1706LEUA+ adds NMI and active-high reset-critical for firmware-controlled shutdown and direct processor interface. Versus TPS3808G33DBVR, DS1706LEUA+ provides integrated pushbutton handling and early-warning capability absent in the TI device, making it superior for robust 5V microcontroller supervision.
Availability
DS1706LEUA+ is available at Aetrix Electronics and suitable for industrial automation, medical diagnostics, telecom infrastructure, and automotive infotainment systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for DS1706LEUA+ 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 DS1706LEUA+ belongs to the MicroMonitor™ family-engineered specifically for microprocessor supervision in harsh environments, combining reset generation, watchdog timing, and early power-fail warning in a single 8-pin package.
FAQ
What is the reset output polarity of DS1706LEUA+?
The DS1706LEUA+ features an active-high reset output (RST), distinct from the /RST variants in the same family. This means RST goes high during power faults or pushbutton events and remains asserted for a minimum of 130ms after VCC recovery. The DS1706LEUA+ does not provide an active-low reset output-designers requiring both polarities must add external inversion logic.
Does DS1706LEUA+ include a watchdog timer, and how is it configured?
Yes, DS1706LEUA+ includes a built-in watchdog timer with a nominal timeout of 1.0–2.2 seconds. It is configured by driving the ST (strobe) input low periodically-each high-to-low transition resets the timer. If ST is not strobed before timeout, WDS (watchdog status) goes active-low for ≥130ms. No external components are needed; ST can connect directly to any microprocessor GPIO or control signal.
Can DS1706LEUA+ monitor voltages other than 5V?
Yes, DS1706LEUA+ can monitor higher or lower DC voltages using the IN pin with an external resistor divider. The internal reference is 1.25V, so any voltage above VCC (up to 11.88V at VCC = 3.3V) can be scaled down to 1.25V at IN. The datasheet provides the exact equation and example calculations-no additional ICs or references are required for custom trip points.
What is the function of the NMI output on DS1706LEUA+?
The NMI (non-maskable interrupt) output on DS1706LEUA+ provides a 200μs active-low pulse when the IN pin voltage drops below its 1.20–1.30V trip point. This serves as an early warning signal-triggering ~200μs before RST activates-allowing firmware to save critical data or disable peripherals before full reset. NMI includes 100μV hysteresis and noise immunity against <2μs glitches.
Is DS1706LEUA+ pin-compatible with other MicroMonitor devices?
Yes, DS1706LEUA+ is pin-compatible with the MAX705/MAX706 family in 8-pin DIP, SOIC, and μSOP packages. Specifically, it shares identical pinout with DS1706EUA and DS1706LEPA/LESA variants. However, functional differences exist-e.g., DS1706LEUA+ provides RST (active-high) and WDS, whereas MAX706ESA+ provides /RST and no NMI-so electrical and firmware compatibility must be verified per application.
DS1706LEUA+ 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:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.65V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 130ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-uMAX/uSOP
DS1706LEUA+ FAQ
1.How can I place an order for DS1706LEUA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1706LEUA+ 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 DS1706LEUA+ reliable?
The price and inventory of DS1706LEUA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1706LEUA+ is usually 5 days.
3.What payment methods are accepted for DS1706LEUA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1706LEUA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1706LEUA+?
DS1706LEUA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1706LEUA+ 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 DS1706LEUA+?
For technical support, including DS1706LEUA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1706LEUA+ requirements.
6.How does Aetrix verify that DS1706LEUA+ is sourced from the original manufacturer or authorized distributors?
All DS1706LEUA+ 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 DS1706LEUA+ meets industry standards.
7.What is the process for return or replacement of DS1706LEUA+?
All DS1706LEUA+ units undergo pre-shipment inspection (PSI). If there is an issue with DS1706LEUA+, 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 DS1706LEUA+ part is unused and in its original packaging.
Return procedure for DS1706LEUA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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