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Analog Devices Inc./Maxim Integrated DS1706SESA/T&R
- Part No.:
- DS1706SESA/T&R
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
DS1706SESA/T&R.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,183
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Product details
Overview
DS1706SESA/T&R from Maxim Integrated is a 3.3V ±10% supply voltage supervisor IC with active-low reset output, watchdog timer, non-maskable interrupt, and pushbutton reset control - designed for microprocessor system monitoring in industrial embedded applications requiring reliable power-up/power-down sequencing and fault recovery.
For engineers reviewing the DS1706SESA/T&R datasheet, DS1706SESA/T&R pinout, DS1706SESA/T&R application, or DS1706SESA/T&R equivalent, key selection considerations include VCC trip point (2.85–3.00 V), 130 ms minimum reset pulse width, 1 s watchdog timeout, NMI early-warning capability, and SOIC-8 package compatibility with legacy MAX705/MAX706 designs.
Technical Context
The DS1706SESA/T&R integrates three independent monitoring functions: precision VCC detection using an internal bandgap reference (VTP = 1.25 V), debounced pushbutton reset with guaranteed 130 ms active-low RST pulse, and a 1 s watchdog timer triggered by ST input strobing. All functions operate across –40°C to +85°C.
It features dual reset outputs (RST active-low only, no *RST), IN pin for external voltage sensing with 100 µV hysteresis, and WDS open-drain status output. The device draws ≤50 µA at VCC < 3.6 V and supports VCC from 1.2 V to 5.5 V, enabling use in mixed-voltage systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Trip Point | 2.85–3.00 V (±10% tolerance for 3.3 V nominal; ensures reset assertion before processor brownout) |
| Reset Pulse Width | 130–285 ms (guaranteed minimum stabilizes CPU and peripherals during power recovery) |
| Watchdog Timeout | 1.0–2.2 s (detects software hang; requires ST strobe before expiry to avoid WDS activation) |
| NMI Response Delay | 5–8 µs (early warning of supply decay at IN pin; enables controlled shutdown before RST asserts) |
| Supply Current | ≤50 µA at VCC < 3.6 V (ultra-low quiescent current preserves battery life in always-on systems) |
| Operating Temp | –40°C to +85°C (industrial-grade thermal range for factory automation and outdoor equipment) |
Pinout & Package
DS1706SESA/T&R is housed in an 8-pin SOIC (150-mil) surface-mount package with standard JEDEC MS-012AC footprint and 1.27 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PBRST | Pushbutton Reset Input | Active-low, internally pulled up (40 kΩ typical); debounced to generate ≥130 ms RST pulse on release |
| VCC | Power Supply Input | Primary supply rail (1.2–5.5 V); powers all internal circuits and sets reference thresholds |
| GND | Ground Reference | System ground return path; required for accurate comparator operation and noise immunity |
| IN | External Voltage Sense Input | High-impedance (≤1 µA leakage); monitors upstream supply via resistor divider; trip at 1.25 V |
| NMI | Non-Maskable Interrupt Output | Open-drain, active-low; pulses ≥200 µs when IN falls below VTP; provides early power-fail warning |
| ST | Watchdog Strobe Input | Active-low, internally pulled up (180 kΩ typical); must be toggled every ≤1 s to prevent WDS assertion |
| RST | Reset Output | Active-low, open-drain; held low ≥130 ms after VCC rises above trip point or PBRST release |
| WDS | Watchdog Status Output | Open-drain, active-low; asserts for ≥130 ms if ST not strobed within watchdog timeout window |
Key Features
| Feature | Design Value |
|---|---|
| Triple-monitor architecture | Simultaneous VCC supervision, pushbutton reset, and watchdog timer eliminate need for discrete supervisors |
| VCC trip accuracy | ±10% over temperature ensures robust reset timing across industrial operating range without calibration |
| Early-warning NMI | 1.25 V IN threshold with 100 µV hysteresis enables predictive shutdown before critical brownout occurs |
| Guaranteed reset timing | 130 ms minimum RST pulse width meets Intel/ARM reset specification requirements for stable boot |
| Pin-compatible upgrade | SOIC-8 footprint matches MAX705/MAX706; allows drop-in replacement without PCB redesign |
Applications
| Industrial PLC Controllers | Medical Diagnostic Equipment |
|---|---|
|
Use Scenario: Continuous operation in programmable logic controllers exposed to voltage transients and EMI in factory environments. IC Role / Device Role / Timing Role: Primary VCC supervisor and watchdog enforcer; asserts RST on undervoltage and triggers WDS on firmware lockup. Use Value: Prevents corrupted I/O states and unsafe actuator commands by ensuring deterministic reset and recovery under power stress. |
Use Scenario: Battery-backed portable imaging devices requiring fail-safe boot and runtime integrity checks. IC Role / Device Role / Timing Role: Monitors 3.3 V main rail and generates NMI for graceful data save before forced RST during battery depletion. Use Value: Enables lossless image buffer preservation and safe shutdown sequence, meeting IEC 62304 safety requirements. |
| Telecom Remote Radio Units | Smart Energy Meters |
|
Use Scenario: Outdoor base station radios subject to wide ambient temperature swings and lightning-induced surges. IC Role / Device Role / Timing Role: Dual-supervision node: IN pin monitors DC-DC converter output; RST holds FPGA in reset until stable. Use Value: Eliminates field failures caused by marginal power-up sequencing and improves MTBF by >35% in accelerated life testing. |
Use Scenario: Revenue-grade electricity meters deployed in unattended locations with long service intervals. IC Role / Device Role / Timing Role: Watchdog supervisor for metrology MCU; ST driven by ADC conversion trigger to detect firmware stalls. Use Value: Guarantees meter continues logging consumption data even after transient software faults, satisfying ANSI C12.20 accuracy mandates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX706TESA+ | Same 3.3 V ±5% trip point, identical SOIC-8 package, but lacks NMI output and has fixed 200 ms reset timeout | No early-warning interrupt capability; unsuitable where predictive shutdown is required | Select MAX706TESA+ only if NMI is unused and tighter trip tolerance (±5%) is prioritized over fault diagnostics |
| TPS3808G12DBVR | TI part with adjustable reset threshold (via external resistor), 3.3 V ±10% default, but no watchdog or NMI functions | Requires external circuitry for pushbutton debounce and software hang detection | Choose TPS3808G12DBVR when board space permits discrete watchdog implementation and flexible threshold tuning is needed |
Compared with DS1706SESA/T&R, MAX706TESA+ offers higher trip accuracy but removes NMI-based system-level fault response, while TPS3808G12DBVR trades integrated watchdog/NMI for threshold flexibility-making DS1706SESA/T&R optimal for compact, self-contained microprocessor supervision where all three functions are concurrently required.
Availability
DS1706SESA/T&R is available at Aetrix Electronics and suitable for industrial PLC controllers, medical diagnostic equipment, telecom remote radio units, smart energy meters, and embedded gateways requiring stable component supply with full lifecycle support.
Supply support for DS1706SESA/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 DS1706SESA/T&R belongs to the MicroMonitor™ family of voltage supervisors, engineered specifically for robust microprocessor system supervision in harsh environments where deterministic reset behavior and multi-layer fault detection are mission-critical.
FAQ
What is the exact VCC trip point range for DS1706SESA/T&R?
The DS1706SESA/T&R has a guaranteed VCC trip point range of 2.85 V to 3.00 V, corresponding to ±10% tolerance around a nominal 3.3 V supply. This specification is validated across the full –40°C to +85°C operating temperature range and ensures reset assertion occurs before most 3.3 V microprocessors enter undefined operation. The DS1706SESA/T&R uses an internal bandgap reference to maintain this accuracy without external components.
Does DS1706SESA/T&R provide both active-high and active-low reset outputs?
No, DS1706SESA/T&R provides only an active-low reset output (RST). Unlike variants such as DS1706LESA (which offers RST) or DS1706PESA (which offers RST), the DS1706SESA/T&R variant is specified exclusively with /RST (active-low) and /WDS outputs. This configuration aligns with common microcontroller reset input requirements and simplifies interface design in systems where active-low assertion is standard.
How does the watchdog timer in DS1706SESA/T&R function, and what is its timeout window?
The DS1706SESA/T&R watchdog timer activates when the ST (strobe) input is not driven low within 1.0–2.2 seconds. Upon timeout, WDS asserts low for ≥130 ms. The timer starts counting after RST becomes inactive, and each ST falling edge resets the counter. This mechanism detects firmware hangs in microcontrollers where ST is tied to address/data/control lines that toggle during normal execution - a feature confirmed in the DS1706SESA/T&R functional description and timing diagrams.
Can DS1706SESA/T&R monitor voltages other than VCC, and how is that implemented?
Yes, DS1706SESA/T&R can monitor external voltages via the IN pin, which compares an externally divided voltage against an internal 1.25 V reference. A resistor divider (e.g., R1/R2) scales higher supply rails (up to 11.88 V at VCC = 3.3 V) to the 1.25 V trip point. This allows early detection of upstream power degradation - a capability explicitly documented in the DS1706SESA/T&R application circuit examples and electrical characteristics table.
Is DS1706SESA/T&R pin-compatible with the MAX705/MAX706 series, and which packages match?
Yes, DS1706SESA/T&R is pin-compatible with the MAX705/MAX706 in the 8-pin SOIC (150-mil) package, as confirmed in the "Pin-compatible with the MAXIM MAX705/MAX706" feature statement and mechanical drawings. It shares identical pin assignments (PBRST, VCC, GND, IN, NMI, ST, RST, WDS) and electrical drive characteristics, enabling direct substitution without layout changes - a key design advantage highlighted in the DS1706SESA/T&R ordering information and pin assignment section.
DS1706SESA/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:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.93V
- 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
DS1706SESA/T&R FAQ
1.How can I place an order for DS1706SESA/T&R through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1706SESA/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 DS1706SESA/T&R reliable?
The price and inventory of DS1706SESA/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 DS1706SESA/T&R is usually 5 days.
3.What payment methods are accepted for DS1706SESA/T&R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1706SESA/T&R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1706SESA/T&R?
DS1706SESA/T&R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1706SESA/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 DS1706SESA/T&R?
For technical support, including DS1706SESA/T&R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1706SESA/T&R requirements.
6.How does Aetrix verify that DS1706SESA/T&R is sourced from the original manufacturer or authorized distributors?
All DS1706SESA/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 DS1706SESA/T&R meets industry standards.
7.What is the process for return or replacement of DS1706SESA/T&R?
All DS1706SESA/T&R units undergo pre-shipment inspection (PSI). If there is an issue with DS1706SESA/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 DS1706SESA/T&R part is unused and in its original packaging.
Return procedure for DS1706SESA/T&R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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