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Analog Devices Inc./Maxim Integrated DS1706RESA+T&R
- Part No.:
- DS1706RESA+T&R
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
DS1706RESA+T&R.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,058
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Product details
Overview
DS1706RESA+T&R from Maxim Integrated is a 3.3V ±20% supply voltage supervisor IC with active-low reset (/RST), watchdog status output (/WDS), non-maskable interrupt (NMI), and pushbutton reset input (PBRST) - designed for microprocessor power monitoring in industrial embedded systems. It delivers 130 ms minimum reset pulse width, 1.0–2.2 s watchdog timeout, and operates across –40°C to +85°C.
For engineers reviewing the DS1706RESA+T&R datasheet, DS1706RESA+T&R pinout, DS1706RESA+T&R application, or DS1706RESA+T&R equivalent, key selection criteria include VCC trip point (2.85–3.00 V), IN sense threshold (1.25 V), watchdog strobe timing, NMI pulse width (≥200 µs), and compatibility with 8-pin SOIC packaging.
Technical Context
The DS1706RESA+T&R implements three independent monitoring functions: precision VCC supervision using an internal bandgap reference and comparator, debounced pushbutton reset control with guaranteed 130 ms /RST assertion, and a 1-second watchdog timer triggered by ST input transitions. All functions operate within a single 8-pin SOIC package without external components.
Its IN pin accepts user-defined voltage dividers for upstream supply sensing, while NMI provides early warning at 1.25 V threshold with 100 µV hysteresis and noise immunity against <2 µs glitches. The /RST output remains active for ≥130 ms after VCC recovery to ensure processor stabilization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Trip Point | 2.85–3.00 V (±20% tolerance for 3.3V systems) |
| Reset Pulse Width | 130–285 ms (ensures full microprocessor initialization before release) |
| Watchdog Timeout | 1.0–2.2 s (configurable via ST input frequency; no external RC needed) |
| IN Sense Threshold | 1.20–1.30 V (supports custom upstream voltage monitoring with resistor divider) |
| NMI Pulse Width | ≥200 µs (provides reliable early-warning interrupt before reset activation) |
| Operating Current | 50 µA (at VCC < 3.6 V; enables low-power system monitoring) |
| Temperature Range | –40°C to +85°C (industrial-grade operation without derating) |
Pinout & Package
DS1706RESA+T&R is supplied in an 8-pin SOIC (150-mil) package, RoHS-compliant and lead-free, with standard JEDEC MS-012AC footprint and thermal characteristics suitable for reflow soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PBRST | Pushbutton Reset Input | Active-low, internally pulled up (40 kΩ); debounced to generate ≥130 ms /RST pulse on release |
| VCC | Power Supply | Primary 3.3V supply input; monitored for out-of-tolerance condition triggering /RST and NMI |
| GND | Ground | Reference node for all analog comparators and digital outputs |
| IN | Voltage Sense Input | High-impedance (≤1 µA leakage); monitors upstream supply via external resistor divider referenced to 1.25 V |
| NMI | Non-Maskable Interrupt Output | Open-drain, active-low; pulses ≥200 µs when IN falls below 1.25 V, enabling early system shutdown |
| ST | Strobe Input | Active-high edge-triggered watchdog input; resets internal timer on each high-to-low transition |
| /RST | Active-Low Reset Output | Open-drain, active-low; held low ≥130 ms after VCC recovery to guarantee processor reset completion |
| /WDS | Watchdog Status Output | Open-drain, active-low; asserts ≥130 ms if ST not strobed within watchdog timeout window |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Triple Monitoring | Combines VCC supervision, pushbutton reset, and watchdog timer in one IC - eliminates discrete RC networks and logic gates |
| User-Configurable Voltage Sensing | IN pin supports adjustable trip points via resistor divider, enabling monitoring of supplies >3.3V (e.g., 12V rails) with 1.25 V reference |
| No External Timing Components | Internal oscillator drives 1 s watchdog timeout and 130 ms reset delay - no capacitors or resistors required |
| Industrial Temperature Operation | Guaranteed functionality from –40°C to +85°C without performance degradation or calibration drift |
| Pin Compatibility with MAX705/MAX706 | Direct drop-in replacement in 8-pin DIP, SOIC, and µSOP footprints - no PCB redesign needed |
Applications
| Industrial PLC Control Unit | Medical Infusion Pump |
|---|---|
Use Scenario: Continuous operation in factory-floor automation where brownouts or software lockups must trigger safe shutdown and restart. IC Role / Device Role / Timing Role: DS1706RESA+T&R acts as the primary power integrity guardian - asserting /RST during undervoltage, generating NMI for firmware-initiated graceful halt, and resetting watchdog on address bus activity. Use Value: Prevents corrupted I/O states and ensures deterministic boot sequence after power recovery, meeting IEC 61000-4-11 immunity requirements. | Use Scenario: Battery-powered portable medical device requiring fail-safe behavior during voltage sag or processor hang. IC Role / Device Role / Timing Role: DS1706RESA+T&R monitors main 3.3V rail and battery-derived 5V auxiliary supply via IN pin, triggers /RST to halt motor drivers, and uses /WDS to signal fault to host MCU. Use Value: Guarantees 130 ms minimum reset hold time for EEPROM write completion and ADC calibration reload upon recovery. |
| Telecom Remote Radio Unit | Smart Energy Meter |
Use Scenario: Outdoor base station equipment exposed to wide temperature swings and intermittent AC input. IC Role / Device Role / Timing Role: DS1706RESA+T&R supervises FPGA and DSP core voltage, feeds NMI to ARM Cortex-M4 for controlled state save, and uses PBRST for field-service manual reset. Use Value: Delivers 100 µV hysteresis on NMI path to reject line noise, ensuring no spurious interrupts during RF transmission bursts. | Use Scenario: Revenue-grade meter operating unattended for 15+ years with strict uptime and data integrity mandates. IC Role / Device Role / Timing Role: DS1706RESA+T&R monitors both 3.3V MCU rail and 2.5V RTC backup supply, asserts /RST to freeze metrology registers, and pulses /WDS to initiate secure flash logging before power loss. Use Value: Enables compliance with ANSI C12.1 and IEC 62053-21 via guaranteed 130 ms reset assertion and 200 µs NMI pulse for time-critical event capture. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX706TESA+ | 3.3V ±5% trip point (VCCTP = 3.08 V typ), same 8-pin SOIC package and pinout | Better accuracy for stable 3.3V rails; less margin for noisy or aging supplies | Select when tighter VCC tolerance is required and supply ripple is <2% |
| TPS3808G33DBVR | 3.3V ±2% trip point, 200 ms fixed reset delay, no NMI or watchdog functions | Single-function reset IC only - lacks IN sense, NMI, ST, and /WDS capabilities | Select when only basic reset generation is needed and system-level watchdog/NMI handled elsewhere |
Compared with MAX706TESA+, DS1706RESA+T&R trades trip-point accuracy for wider tolerance margin under dynamic load conditions; compared with TPS3808G33DBVR, it adds integrated NMI, watchdog, and programmable sensing - reducing BOM count and board area by eliminating three discrete ICs.
Availability
DS1706RESA+T&R is available at Aetrix Electronics and suitable for industrial PLC control units, medical infusion pumps, telecom remote radio units, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for DS1706RESA+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) designs precision analog, mixed-signal, and power management ICs for industrial, automotive, communications, and computing applications.
The DS1706RESA+T&R belongs to the MicroMonitor™ family - engineered specifically for robust microprocessor supervision in harsh environments where simultaneous power, software, and operator-event monitoring is essential.
FAQ
What is the exact VCC trip point range for DS1706RESA+T&R?
The DS1706RESA+T&R has a guaranteed VCC trip point range of 2.85 V to 3.00 V, corresponding to ±20% tolerance around a nominal 3.3 V supply. This specification is validated across –40°C to +85°C and ensures reliable reset assertion during brownout conditions. The DS1706RESA+T&R uses an internal temperature-compensated bandgap reference to maintain this accuracy without external calibration.
Does DS1706RESA+T&R support monitoring a 12V supply?
Yes, DS1706RESA+T&R supports monitoring higher-voltage supplies like 12V through its IN pin using an external resistor divider. The IN pin has a fixed 1.25 V threshold and high input impedance (<1 µA), allowing calculation of R1/R2 values per the formula VSENSE = (R2/(R1+R2)) × 1.25 V. For 12V monitoring, typical values are R2 = 10 kΩ and R1 ≈ 86 kΩ, ensuring the IN voltage stays within VCC limits.
How does the watchdog function of DS1706RESA+T&R interact with the reset output?
The watchdog timer in DS1706RESA+T&R operates independently of the VCC monitor but shares the /RST assertion logic only indirectly: watchdog timeout asserts /WDS, not /RST. However, /WDS can be connected to PBRST to trigger a manual reset, and NMI can also drive PBRST for automatic reset on early power failure. The /RST output itself is activated solely by VCC decay or PBRST release - never directly by watchdog timeout.
Is DS1706RESA+T&R pin-compatible with MAX706ESA?
Yes, DS1706RESA+T&R is pin-compatible with MAX706ESA in the 8-pin SOIC package. Both share identical pin assignments for VCC, GND, IN, NMI, ST, PBRST, /RST, and /WDS. This allows direct substitution without PCB modification, though DS1706RESA+T&R offers 3.3V ±20% monitoring versus MAX706ESA's 5V ±10%, so supply voltage compatibility must be verified.
What is the minimum pulse width guaranteed on the NMI output of DS1706RESA+T&R?
The DS1706RESA+T&R guarantees a minimum NMI pulse width of 200 µs when the IN pin voltage crosses the 1.25 V threshold. This duration is sufficient to register on most microcontroller interrupt inputs without requiring external pulse stretching. The NMI output is open-drain and active-low, and its timing is specified across the full –40°C to +85°C operating range with built-in 100 µV hysteresis to suppress noise-induced false triggers.
DS1706RESA+T&R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- MicroMonitor™
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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-SOIC
DS1706RESA+T&R FAQ
1.How can I place an order for DS1706RESA+T&R through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1706RESA+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 DS1706RESA+T&R reliable?
The price and inventory of DS1706RESA+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 DS1706RESA+T&R is usually 5 days.
3.What payment methods are accepted for DS1706RESA+T&R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1706RESA+T&R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1706RESA+T&R?
DS1706RESA+T&R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1706RESA+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 DS1706RESA+T&R?
For technical support, including DS1706RESA+T&R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1706RESA+T&R requirements.
6.How does Aetrix verify that DS1706RESA+T&R is sourced from the original manufacturer or authorized distributors?
All DS1706RESA+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 DS1706RESA+T&R meets industry standards.
7.What is the process for return or replacement of DS1706RESA+T&R?
All DS1706RESA+T&R units undergo pre-shipment inspection (PSI). If there is an issue with DS1706RESA+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 DS1706RESA+T&R part is unused and in its original packaging.
Return procedure for DS1706RESA+T&R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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