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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:3,813
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Product details
Overview
DS1706ESA from Maxim Integrated is a 5.0V ±10% supply voltage supervisor IC with active-low reset output (/RST), watchdog timer, non-maskable interrupt (NMI), and pushbutton reset debouncing - designed for microprocessor power monitoring in industrial embedded systems. It delivers 130 ms minimum reset pulse width, 1.0 s watchdog timeout, and operates across -40°C to +85°C.
For engineers reviewing the DS1706ESA datasheet, DS1706ESA pinout, DS1706ESA application, or DS1706ESA equivalent, key selection considerations include VCC trip point (4.25–4.50 V), /RST output polarity, SOIC-8 package compatibility, and functional alignment with 5V microcontroller power-up/power-down sequencing and fault recovery requirements.
Technical Context
The DS1706ESA integrates three independent monitoring functions: precision VCC threshold detection (4.40 V typical), IN-pin-based early-warning NMI generation at 1.25 V reference, and ST-input-triggered watchdog timer with 1.0–2.2 s timeout. All functions operate with internal bandgap reference and temperature compensation.
Its reset logic asserts /RST low when VCC falls below VCCTP and holds it active ≥130 ms after VCC recovery; PBRST input is internally debounced and guarantees ≥130 ms /RST pulse on button release; WDS outputs low upon watchdog timeout, enabling system-level fault logging or safe shutdown.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Trip Point | 4.25–4.50 V (±10% tolerance for 5.0 V systems; ensures reliable reset assertion before microprocessor brownout) |
| Reset Pulse Width | 130–285 ms (guaranteed minimum 130 ms active-low /RST ensures full microprocessor initialization and clock stabilization) |
| Watchdog Timeout | 1.0–2.2 s (configurable via ST strobe frequency; enables software execution supervision without external timing components) |
| NMI Trip Threshold | 1.20–1.30 V at IN pin (supports user-defined upstream voltage sensing via resistor divider for early power-fail warning) |
| Supply Current | 60 µA max (at VCC < 5.5 V; enables low-power operation in battery-backed or energy-constrained systems) |
| Operating Temperature | -40°C to +85°C (industrial-grade thermal range suitable for factory automation and outdoor embedded control) |
Pinout & Package
DS1706ESA is housed in an 8-pin SOIC (150-mil) surface-mount package, RoHS-compliant and rated for industrial temperature operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PBRST | Pushbutton Reset Input | Active-low, internally pulled up; debounced to generate ≥130 ms /RST pulse on release - eliminates external RC network |
| VCC | Power Supply Input | Primary 5.0 V supply input; monitored for ±10% trip; powers internal reference, comparators, and logic |
| GND | Ground Reference | Analog and digital ground common return; required for accurate VCC and IN voltage comparison |
| IN | External Voltage Sense Input | High-impedance input referenced to 1.25 V internal bandgap; enables early NMI generation from upstream rail |
| NMI | Non-Maskable Interrupt Output | Open-drain, active-low; pulses ≥200 ns on IN voltage decay - provides time-critical power-fail warning before /RST |
| ST | Watchdog Strobe Input | Active-high edge-triggered input; resets internal 1 s timer on each high-to-low transition - monitors software liveliness |
| /RST | Active-Low Reset Output | Open-drain, active-low reset signal; held low ≥130 ms after VCC recovery - ensures processor reset completion |
| WDS | Watchdog Status Output | Open-drain, active-low; driven low for ≥130 ms upon watchdog timeout - signals firmware hang or execution stall |
Key Features
| Feature | Design Value |
|---|---|
| Three-Function Integration | Combines VCC monitor, NMI generator, and watchdog timer in single SOIC-8 package - reduces BOM count and PCB area vs discrete solutions |
| Programmable Early Warning | IN pin accepts user-defined voltage divider to detect upstream supply degradation before local VCC collapse - extends system shutdown window |
| Guaranteed Reset Timing | 130 ms minimum /RST pulse width enforced regardless of VCC slew rate or PBRST bounce - eliminates need for external timing capacitor |
| Pin Compatibility | Direct replacement for MAX705/MAX706 in SOIC-8 footprint - enables drop-in upgrade path with no layout change |
| Industrial Temperature Support | Validated operation from -40°C to +85°C with full parameter guarantees - suitable for uncontrolled environmental deployments |
Applications
| Industrial PLC Controller | Medical Diagnostic Equipment |
|---|---|
|
Use Scenario: Microcontroller-based programmable logic controller operating in factory-floor environments with fluctuating 5 V supply rails. IC Role / Device Role / Timing Role: DS1706ESA monitors VCC for brownout, generates NMI for graceful I/O shutdown, and asserts /RST to reinitialize firmware after power recovery. Use Value: Prevents corrupted state machine transitions during voltage transients and ensures deterministic restart within 130 ms of stable VCC. |
Use Scenario: Portable ultrasound imaging device with ARM Cortex-M7 host MCU requiring fail-safe boot and runtime supervision. IC Role / Device Role / Timing Role: DS1706ESA provides watchdog supervision of real-time image processing loop via ST input and issues NMI to trigger emergency data save prior to /RST. Use Value: Enables lossless capture of last valid frame before power collapse - critical for diagnostic traceability and regulatory compliance. |
| Smart Energy Meter | Railway Signaling Interface |
|
Use Scenario: ANSI C12.20-certified electricity meter with isolated 5 V auxiliary supply powering metrology and communication subsystems. IC Role / Device Role / Timing Role: DS1706ESA monitors isolated 5 V rail, uses IN pin to sense upstream DC-DC converter output, and drives /RST to preserve flash integrity during grid dips. Use Value: Guarantees EEPROM write completion before reset - prevents firmware corruption during 200 ms utility voltage sags. |
Use Scenario: EN 5012x-compliant signaling interface module interfacing track circuits with centralized control units in harsh railway environments. IC Role / Device Role / Timing Role: DS1706ESA supervises 5 V logic supply, triggers NMI on first sign of rail degradation, and initiates controlled de-energization of safety relays via /RST. Use Value: Meets SIL-2 requirement for deterministic fault response by decoupling NMI warning (≥200 ns) from final reset (≥130 ms). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX706ESA | Identical SOIC-8 pinout and /RST functionality; VCC trip point 4.40 V ±5% (tighter tolerance than DS1706ESA's ±10%) | Lacks NMI output and IN-sense capability; no early-warning interrupt function | Select MAX706ESA only if precise 5% VCC threshold suffices and NMI-based pre-reset actions are unnecessary |
| TPS3808G33DBVR | 3.3 V fixed supply monitor (not 5 V); 3% accuracy; includes manual reset but no watchdog or NMI | Designed for low-voltage DSP/FPGA systems; incompatible with 5 V VCC monitoring or upstream sensing | Choose TPS3808G33DBVR only for 3.3 V applications requiring higher accuracy and lower quiescent current (1.5 µA) |
Compared with MAX706ESA and TPS3808G33DBVR, DS1706ESA uniquely combines 5 V ±10% supervision, NMI-driven early warning, and integrated watchdog in one SOIC-8 device - making it the sole option among the three for applications requiring coordinated power-fail response with pre-reset notification and software liveliness checking.
Availability
DS1706ESA is available at Aetrix Electronics and suitable for industrial PLC controllers, medical diagnostic equipment, smart energy meters, and railway signaling interfaces requiring stable component supply, long-term lifecycle support, and guaranteed industrial-temperature performance.
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 power management ICs for demanding industrial, automotive, and communications applications.
The DS1706ESA belongs to the MicroMonitor™ family of voltage supervisors - engineered specifically for robust microprocessor power sequencing, fault detection, and safe recovery in mission-critical embedded systems.
FAQ
What is the exact VCC trip point range for DS1706ESA?
The DS1706ESA has a guaranteed VCC trip point range of 4.25 V to 4.50 V, with a typical value of 4.40 V. This ±10% tolerance is specified for 5.0 V systems and ensures reliable reset assertion before microprocessor operational limits are exceeded. The trip point is temperature-compensated and validated across the full -40°C to +85°C operating range. DS1706ESA maintains this specification without external calibration or trimming components.
Does DS1706ESA provide both active-high and active-low reset outputs?
No, DS1706ESA provides only an active-low reset output (/RST). The datasheet confirms that DS1706ESA variants feature /RST and /WDS outputs, while active-high RST is available only on DS1706L and DS1706P variants. Pin assignment diagrams and ordering information explicitly list DS1706ESA as "5V-10% MONITOR, /RST, /WDS", confirming its single /RST output configuration.
Can DS1706ESA monitor voltages other than VCC?
Yes, DS1706ESA can monitor external voltages via its IN pin, which compares an externally divided voltage against a precise 1.25 V internal reference. Using a resistor divider, users can configure detection thresholds for upstream supplies (e.g., 12 V or 24 V rails), enabling early NMI generation before VCC collapses. The IN pin supports high-impedance sensing and requires voltage at the pin not to exceed VCC, as specified in the absolute maximum ratings.
What is the watchdog timeout behavior of DS1706ESA?
The DS1706ESA watchdog timer times out between 1.0 s and 2.2 s if the ST input is not strobed with a high-to-low transition. Upon timeout, WDS is driven low for ≥130 ms. The timer starts counting after /RST becomes inactive, and each ST edge resets the counter. This behavior is verified in AC electrical characteristics and timing diagrams, ensuring deterministic firmware supervision without external timing elements. DS1706ESA does not support programmable timeout adjustment.
Is DS1706ESA pin-compatible with MAX705/MAX706?
Yes, DS1706ESA is pin-compatible with MAX705 and MAX706 in the 8-pin SOIC package, as confirmed in the "Pin-compatible with the MAXIM MAX705/MAX706 in 8-pin DIP, 8-pin SOIC, and -SOP" feature statement and matching pin assignments (PBRST, VCC, GND, IN, NMI, ST, /RST, WDS). This allows direct substitution in existing layouts without PCB modification, provided the ±10% VCC tolerance and /RST-only output meet system requirements.
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:
- 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-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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