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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:4,477
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Product details
Overview
DS1706SESA+T&R from Maxim Integrated is a 3.3V ±10% microprocessor supervisory circuit with active-low reset, watchdog timer, and non-maskable interrupt functions. It monitors VCC, detects power transients, debounces pushbutton reset, and provides 130ms minimum reset pulse width. Used in embedded industrial controllers requiring reliable power-up/power-down sequencing and software 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 criteria include VCC trip point (2.85–3.00V), watchdog timeout (1.0–2.2s), NMI response time (5–8µs), and SOIC-8 package compatibility with legacy MAX705/MAX706 designs.
Technical Context
The DS1706SESA+T&R implements three independent monitoring functions: precision VCC threshold detection using an internal bandgap reference (VTP = 1.25V), a 1-second watchdog timer triggered by ST input strobes, and a debounced PBRST input generating guaranteed 130ms reset pulses. All functions operate across –40°C to +85°C.
Its dual reset outputs (RST active-low, no *RST active-high per DS1706S variant) interface directly with microprocessor reset inputs, while the NMI output provides early power-fail warning via high-impedance IN sense pin-enabling flexible voltage divider configuration for upstream supply monitoring.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Trip Point | 2.85V (min) to 3.00V (max); ensures reset assertion before 3.3V system brownout |
| Reset Pulse Width | 130ms (min); guarantees sufficient time for processor and power supply stabilization |
| Watchdog Timeout | 1.0s (min) to 2.2s (max); defines maximum allowable software execution interval before forced recovery |
| NMI Response Time | 5µs (min) to 8µs (max); enables early power-fail detection with noise immunity against <2µs glitches |
| Supply Current | 50µA (max at VCC < 3.6V); supports low-power battery-backed operation |
| Operating Temp | –40°C to +85°C; qualified for industrial-grade embedded systems |
Pinout & Package
DS1706SESA+T&R is housed in an 8-pin SOIC (150-mil) package, RoHS-compliant and lead-free, with standard JEDEC MS-012AC footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PBRST | Pushbutton Reset Input | Active-low, internally pulled up (40kΩ); debounced to generate ≥130ms RST pulse on release |
| VCC | Power Supply | 3.3V nominal input; powers internal comparators, timer, and outputs |
| GND | Ground Reference | Return path for all analog and digital circuitry; must be low-impedance |
| IN | Voltage Sense Input | High-impedance (≤1µA leakage); accepts external resistor divider to monitor upstream supplies |
| NMI | Non-Maskable Interrupt Output | Active-low, open-drain; signals impending power failure 200µs before RST assertion |
| ST | Strobe Input | Active-low watchdog trigger; must be toggled ≤1s to prevent WDS activation |
| RST | Active-Low Reset Output | Push-pull, drives low during fault; holds microprocessor in reset for ≥130ms |
| WDS | Watchdog Status Output | Open-drain, active-low; indicates watchdog timeout; can drive PBRST for auto-recovery |
Key Features
| Feature | Design Value |
|---|---|
| 3.3V ±10% VCC Monitor | Accurate trip window (2.85–3.00V) tailored for 3.3V logic systems with margin for tolerance stack-up |
| Guaranteed 130ms Reset Pulse | Ensures reliable microprocessor initialization regardless of VCC slew rate or load conditions |
| Configurable IN Sense Pin | Enables monitoring of higher-voltage rails (e.g., 5V, 12V) via external resistor divider without level-shifting ICs |
| Integrated Watchdog Timer | 1-second timeout eliminates need for external RC timing components or dedicated watchdog ICs |
| Pin Compatibility with MAX705/MAX706 | Direct drop-in replacement in SOIC-8 layout; reduces redesign effort and qualification time |
Applications
| Industrial PLC Controller | Medical Diagnostic Equipment |
|---|---|
Use Scenario: Power cycling during firmware updates or sensor calibration sequences. IC Role / Device Role / Timing Role: Supervisory circuit asserting RST during VCC instability and generating NMI for graceful shutdown logging. Use Value: Prevents corrupted flash writes and data loss by halting CPU before supply collapse, with 130ms reset hold ensuring clean restart. | Use Scenario: Real-time patient monitoring with battery backup during AC mains interruption. IC Role / Device Role / Timing Role: Monitors main 3.3V rail and triggers NMI at first sign of decay, enabling critical data save before RST activates. Use Value: 5–8µs NMI response provides >200µs advance warning over RST, allowing time-critical RAM-to-EEPROM dump. |
| Telecom Base Station Management | Automotive Infotainment Head Unit |
Use Scenario: Hot-swap of line cards causing localized power transients. IC Role / Device Role / Timing Role: Detects upstream supply droop via IN pin and asserts RST to isolate faulty card without resetting entire chassis. Use Value: Independent IN sense capability enables selective reset of subsystems while maintaining master controller uptime. | Use Scenario: Cold-cranking condition where battery voltage dips below 9V during engine start. IC Role / Device Role / Timing Role: Monitors 3.3V LDO output and asserts RST if VCC falls below 2.85V, preventing erratic MCU behavior. Use Value: ±10% tolerance matches automotive LDO specs; 50µA quiescent current minimizes parasitic drain during sleep mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX706TESA+ | Same 3.3V ±5% trip point (3.00–3.15V), identical SOIC-8 pinout, but lacks WDS output and ST input | No watchdog functionality; suitable only for basic reset-only designs without software supervision | Select MAX706TESA+ when watchdog timer is unnecessary and tighter VCC tolerance (±5%) is required |
| TPS3808G12DBVR | 3.3V ±1.5% fixed threshold, 200ms reset delay, no NMI or watchdog; SOT-23-6 package (not pin-compatible) | Smaller footprint but requires external circuitry for pushbutton debounce and early warning interrupt | Select TPS3808G12DBVR for space-constrained designs where NMI and watchdog are handled elsewhere |
Compared with MAX706TESA+, DS1706SESA+T&R adds watchdog and NMI for enhanced system resilience; compared with TPS3808G12DBVR, it delivers full supervisory integration in SOIC-8 with no layout changes needed for MAX705/706 upgrades.
Availability
DS1706SESA+T&R is available at Aetrix Electronics and suitable for industrial automation, medical diagnostics, telecom infrastructure, and automotive infotainment systems requiring stable component supply and long-term 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) designs precision analog, mixed-signal, and power management ICs for industrial, communications, and computing applications.
The DS1706SESA+T&R belongs to the MicroMonitor™ family-engineered specifically for robust microprocessor supervision in harsh environments where power integrity and software reliability 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 2.85V (minimum) to 3.00V (maximum), corresponding to its 3.3V ±10% specification. This range is tested and specified across the full industrial temperature range (–40°C to +85°C) and ensures reliable reset assertion before system-level brownout occurs. The DS1706SESA+T&R uses an internal temperature-compensated bandgap reference to maintain accuracy under varying thermal conditions.
Does DS1706SESA+T&R support both active-low and active-high reset outputs?
No, DS1706SESA+T&R provides only an active-low reset output (RST). The *RST active-high output is exclusive to DS1706L and DS1706P variants. DS1706SESA+T&R is part of the DS1706S family, which is defined in the ordering table as "3.3V-10% MONITOR, /RST, /WDS", confirming single active-low RST and open-drain WDS outputs. This configuration matches standard microprocessor reset input requirements.
How does the watchdog timer in DS1706SESA+T&R function, and what is its timeout window?
The DS1706SESA+T&R watchdog timer initiates timing upon RST deactivation and requires a high-to-low transition on the ST pin at least once every 1.0 to 2.2 seconds to reset the timer. If no strobe occurs within that window, WDS is driven active-low for ≥130ms. The timeout is factory-trimmed and specified across temperature and voltage; minimum timeout is tested at 2.7V. This ensures deterministic software supervision without external timing components.
Can DS1706SESA+T&R monitor voltages other than 3.3V?
Yes, DS1706SESA+T&R can monitor higher voltages using its high-impedance IN pin with an external resistor divider. Since the internal trip point is fixed at 1.25V (VTP), any input voltage up to VCC can be scaled down to 1.25V at IN. For example, a 5V rail can be monitored using R1=16.4kΩ and R2=10kΩ. The DS1706SESA+T&R datasheet provides the exact equation and design examples to ensure accurate scaling and avoid exceeding VCC at the IN pin.
Is DS1706SESA+T&R pin-compatible with MAX705/MAX706 devices?
Yes, DS1706SESA+T&R is explicitly documented as pin-compatible with MAX705/MAX706 in 8-pin DIP, SOIC, and µSOP packages. Its pin assignment (PBRST, VCC, GND, IN, NMI, ST, RST, WDS) matches the functional mapping of those legacy Maxim parts. This allows direct replacement in existing layouts without PCB modification-critical for cost-sensitive industrial upgrades and obsolescence mitigation programs involving DS1706SESA+T&R.
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:
- Active
- 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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