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Analog Devices Inc./Maxim Integrated DS1706SESA
- Part No.:
- DS1706SESA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
DS1706SESA.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,575
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Product details
Overview
DS1706SESA from Maxim Integrated is a 3.3V ±10% precision voltage supervisor IC with watchdog timer, non-maskable interrupt (NMI), and pushbutton reset control - designed for microprocessor power monitoring in embedded systems. It delivers active-low reset (RST), watchdog status (WDS), and NMI outputs, operates across -40°C to +85°C, and features 130 ms minimum reset pulse width and 1 s watchdog timeout.
For engineers reviewing the DS1706SESA datasheet, DS1706SESA pinout, DS1706SESA application, or DS1706SESA equivalent, key selection criteria include VCC trip point (2.85–3.00 V), industrial temperature range, SOIC-8 package compatibility, and functional alignment with 3.3V microcontroller power-up/power-down sequencing and fault recovery requirements.
Technical Context
The DS1706SESA integrates three independent monitoring functions: (1) VCC supply monitoring with 2.93 V typical trip point and hysteresis; (2) external voltage sensing via high-impedance IN pin referenced to 1.25 V internal bandgap; and (3) watchdog timer triggered by ST input transitions, timing out after 1.0–2.2 s if unrefreshed. All functions drive dedicated open-drain or push-pull outputs with defined timing behavior.
It supports system-level fault response through combinable signals: NMI provides early warning of impending power failure (200 µs pulse), while RST forces processor halt during undervoltage; PBRST enables debounced manual reset with guaranteed ≥130 ms active-low pulse; WDS indicates watchdog timeout status. No external components are required for basic operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Trip Point | 2.85–3.00 V (±10% for 3.3V systems); ensures reliable reset assertion before microprocessor brownout. |
| Reset Pulse Width | 130–285 ms; guarantees sufficient time for power supply and CPU stabilization on power-up or recovery. |
| Watchdog Timeout | 1.0–2.2 s; provides configurable software execution supervision without external timing components. |
| NMI Pulse Width | ≥200 µs; delivers early, non-maskable alert for controlled shutdown before reset activation. |
| Operating Temp | -40°C to +85°C; validated for industrial-grade embedded and control applications. |
| Supply Current | 50 µA (VCC < 3.6 V); enables low-power always-on monitoring in battery-backed or energy-sensitive designs. |
| IN Pin Reference | 1.25 V ±50 mV; allows flexible external voltage divider configuration for upstream rail monitoring. |
Pinout & Package
DS1706SESA is housed in an 8-pin SOIC (150-mil) package with standard JEDEC MS-012AC footprint and gull-wing leads. Pin 1 is marked with a beveled corner or dot; device orientation follows industry-standard SOIC conventions.
| 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 3.3V supply input; powers internal comparators, reference, and logic; trip monitored at 2.93 V typ. |
| GND | Ground Reference | Common return path for all analog and digital circuitry; must be low-impedance for accurate voltage sensing. |
| IN | External Voltage Sense Input | High-impedance (≤1 µA leakage) input referenced to 1.25 V internal bandgap; used for upstream rail monitoring. |
| WDS | Watchdog Status Output | Open-drain active-low output; driven low for ≥130 ms upon watchdog timeout; requires external pull-up. |
| RST | Active-Low Reset Output | Push-pull active-low reset signal; asserted during VCC undervoltage, power-up, or PBRST activation. |
| ST | Strobe Input | Active-low watchdog refresh input; internal 180 kΩ pull-up; must be toggled ≤1 s to prevent timeout. |
| NMI | Non-Maskable Interrupt Output | Open-drain active-low interrupt; pulsed ≥200 µs when IN voltage falls below 1.25 V threshold. |
Key Features
| Feature | Design Value |
|---|---|
| Triple-function supervision | Simultaneous VCC monitoring, external rail sensing (IN), and software-execution watchdog - eliminates need for discrete supervisors or timers. |
| Configurable reset threshold | 2.93 V typical trip for 3.3V ±10% systems ensures compatibility with modern low-voltage microcontrollers without margin loss. |
| Guaranteed reset timing | 130 ms minimum RST assertion on power-up or fault ensures robust CPU initialization and state recovery. |
| Early-warning NMI | 200 µs NMI pulse at 1.25 V IN threshold provides deterministic time window for graceful firmware shutdown before reset. |
| Pin-compatible upgrade path | Direct replacement for MAX705/MAX706 in SOIC-8; same pinout and function mapping simplifies legacy design migration. |
Applications
| Industrial PLC Controller | Medical Diagnostic Device |
|---|---|
|
Use Scenario: Microcontroller-based programmable logic controller operating in factory environments with fluctuating 3.3V supply rails. IC Role / Device Role / Timing Role: DS1706SESA monitors VCC and upstream 5V DC-DC output via IN pin, asserts RST on brownout, and triggers NMI for pre-fault logging. Use Value: Prevents corrupted I/O states and firmware crashes by enforcing deterministic reset sequencing and enabling 200 µs early warning for data save routines. |
Use Scenario: Portable ultrasound imaging unit requiring fail-safe boot and runtime supervision of ARM Cortex-M7 core. IC Role / Device Role / Timing Role: DS1706SESA provides active-low reset during 3.3V LDO transients and uses ST input tied to UART TX line to supervise firmware liveliness. Use Value: Guarantees 130 ms reset hold time for full memory initialization and prevents silent hangs via 1 s watchdog timeout with WDS-driven fault flagging. |
| Automotive Body Control Module | Smart Energy Meter |
|
Use Scenario: CAN-connected BCM powered from vehicle battery via 3.3V regulator, subject to load-dump and cold-crank conditions. IC Role / Device Role / Timing Role: DS1706SESA senses VCC and monitors upstream 12V rail via resistor divider on IN pin; generates NMI for controlled CAN message flush before RST assertion. Use Value: Enables safe bus-off recovery and EEPROM write protection during voltage sags, leveraging 2.93 V trip point aligned with automotive 3.3V supply tolerances. |
Use Scenario: Revenue-grade electricity meter with real-time clock, metrology ASIC, and isolated RS-485 interface. IC Role / Device Role / Timing Role: DS1706SESA supervises 3.3V metrology rail and uses PBRST connected to tamper-detection switch to force secure reset on enclosure breach. Use Value: Delivers certified 130 ms reset pulse and debounced mechanical input handling - meeting IEC 62056-21 tamper-response timing requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX706ESA | 5V ±10% VCC trip (4.40 V typ); no IN pin for external sensing; identical SOIC-8 pinout and RST/WDS/NMI functionality. | Designed for 5V systems only; lacks flexibility for multi-rail monitoring or 3.3V compatibility. | Select MAX706ESA only for legacy 5V designs where DS1706SESA's 3.3V trip point and IN capability are unnecessary. |
| TPS3808G18DBVR | 3.3V ±1.5% tighter tolerance (1.8 V fixed output version); no NMI or ST inputs; single-supply reset only; SOT-23-6 package. | Minimalist reset IC without watchdog or interrupt features; unsuitable for systems requiring early warning or software supervision. | Choose TPS3808G18DBVR only for cost-sensitive, space-constrained 3.3V applications needing only basic reset - not for DS1706SESA's triple-function use cases. |
Compared with MAX706ESA and TPS3808G18DBVR, DS1706SESA uniquely combines 3.3V ±10% supervision, external rail monitoring (IN), and integrated watchdog/NMI in a pin-compatible SOIC-8 package - making it irreplaceable for designs requiring coordinated fault detection, graceful shutdown, and software liveliness assurance.
Availability
DS1706SESA is available at Aetrix Electronics and suitable for industrial PLC controllers, medical diagnostic devices, automotive body control modules, and smart energy meters requiring stable component supply, long-term lifecycle support, and guaranteed SOIC-8 sourcing.
Supply support for DS1706SESA 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 analog, mixed-signal, and power management ICs for industrial, communications, and computing applications.
The DS1706SESA belongs to the MicroMonitor™ family - engineered specifically for robust microprocessor supervision in harsh environments, combining voltage monitoring, watchdog timing, and interrupt signaling in a single compact IC.
FAQ
What is the exact VCC trip point specification for DS1706SESA?
The DS1706SESA has a guaranteed VCC trip point range of 2.85 V (min) to 3.00 V (max), with 2.93 V typical - calibrated for ±10% tolerance on nominal 3.3V supplies. This value is specified in the DC Electrical Characteristics table under "VCC Trip Point DS1706S" and applies exclusively to the DS1706SESA variant, not other members of the DS1706 family.
Does DS1706SESA provide both active-high and active-low reset outputs?
No, DS1706SESA provides only an active-low reset output (RST). The datasheet explicitly lists its ordering option as "3.3V-10% MONITOR, /RST, /WDS", confirming RST is active-low. Active-high reset (*RST) is available only on DS1706L and DS1706P variants - not on DS1706SESA.
Can DS1706SESA monitor a 5V rail while powered from 3.3V?
Yes - DS1706SESA can monitor higher-voltage rails using its IN pin. With an external resistor divider, the IN input (referenced to 1.25 V internal bandgap) safely senses voltages up to 11.88 V when VCC = 3.3 V. The DS1706SESA itself must be powered from 3.3V, but the IN pin's high-impedance interface enables upstream 5V rail supervision without level-shifting.
What is the watchdog timeout behavior of DS1706SESA?
The DS1706SESA watchdog times out 1.0–2.2 seconds after the last ST input falling edge, provided RST is inactive. Upon timeout, WDS goes active-low for ≥130 ms. The watchdog restarts on each ST low-to-high transition - meaning ST must be toggled at least once per timeout period to prevent WDS assertion. This behavior is confirmed in the AC Electrical Characteristics table under "Watchdog Timeout tTD".
Is DS1706SESA pin-compatible with MAX705/MAX706?
Yes, DS1706SESA is pin-compatible with MAX705/MAX706 in 8-pin SOIC packages. The pin assignment matches exactly: PBRST, VCC, GND, IN, WDS, RST, ST, NMI occupy pins 1–8 respectively. This compatibility is explicitly stated in the "Pin-compatible with the MAXIM MAX705/MAX706" feature bullet and verified in the Pin Assignment diagrams for SOIC-8.
DS1706SESA 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:
- 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 FAQ
1.How can I place an order for DS1706SESA through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1706SESA 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 reliable?
The price and inventory of DS1706SESA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1706SESA is usually 5 days.
3.What payment methods are accepted for DS1706SESA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1706SESA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1706SESA?
DS1706SESA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1706SESA 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?
For technical support, including DS1706SESA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1706SESA requirements.
6.How does Aetrix verify that DS1706SESA is sourced from the original manufacturer or authorized distributors?
All DS1706SESA 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 meets industry standards.
7.What is the process for return or replacement of DS1706SESA?
All DS1706SESA units undergo pre-shipment inspection (PSI). If there is an issue with DS1706SESA, 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 part is unused and in its original packaging.
Return procedure for DS1706SESA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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