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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:2,551
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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 provides 130 ms minimum reset pulse width, 1 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, this page delivers verified functional specifications, validated pin roles, confirmed industrial-temperature operation, and real-world use cases in power-fail warning, watchdog supervision, and pushbutton-controlled reset sequencing.
Technical Context
The DS1706RESA/T&R integrates three independent monitoring functions: precision VCC threshold detection (VCCTP = 2.85–3.00 V), high-impedance IN-pin voltage sensing (VTP = 1.25 V) for upstream supply monitoring, and a strobe-driven watchdog timer with 1.0–2.2 s timeout. All functions operate within a single 8-pin SOIC package without external components.
Its reset logic asserts /RST low for ≥130 ms on power-up or VCC dropout; NMI pulses low for ≥200 µs upon IN-pin trip; and /WDS goes low for ≥130 ms if ST is not toggled within timeout. Internal pull-ups (40 kΩ on PBRST, 180 kΩ on ST) enable direct switch or microcontroller signal interfacing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Trip Point | 2.85–3.00 V (±20% tolerance for 3.3V systems; ensures reliable reset assertion before processor brownout) |
| Reset Pulse Width | 130–285 ms (guaranteed minimum duration holds CPU in reset long enough for power and clock stabilization) |
| Watchdog Timeout | 1.0–2.2 s (configurable via ST strobe timing; detects software lockup without firmware modification) |
| NMI Pulse Width | ≥200 µs (provides early power-fail warning with 100 µV hysteresis to reject noise-induced false triggers) |
| Operating Temperature | –40°C to +85°C (fully specified for industrial environments; no derating required) |
| Supply Current | 50 µA (at VCC < 3.6V; enables always-on monitoring in battery-backed or low-power systems) |
Pinout & Package
DS1706RESA/T&R is supplied in an 8-pin SOIC (150-mil) package, RoHS-compliant, tape-and-reel format (T&R). Pin assignments are identical across DS1705/DS1706 family variants in SOIC packaging.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PBRST | Pushbutton Reset Input | Active-low, internally pulled up to VCC (40 kΩ); debounced to guarantee ≥130 ms /RST pulse on release |
| VCC | Power Supply Input | Primary supply rail (2.85–5.5 V); powers all internal circuits and defines VCCTP threshold |
| GND | Ground Reference | Common return path for VCC, IN, ST, and all I/O; must be low-impedance for accurate voltage sensing |
| 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; signals impending power failure ≥200 µs before /RST assertion |
| ST | Watchdog Strobe Input | Active-high, internally pulled up (180 kΩ); must toggle low at least once per 1 s to prevent /WDS activation |
| /RST | Active-Low Reset Output | Open-drain, active-low; drives microprocessor reset pin; held low ≥130 ms during power-up or dropout |
| /WDS | Watchdog Status Output | Open-drain, active-low; indicates watchdog timeout; used to trigger system-level recovery or logging |
Key Features
| Feature | Design Value |
|---|---|
| Triple-function integration | Combines VCC monitor, pushbutton reset controller, and watchdog timer in one 8-pin SOIC-eliminates discrete RC networks and logic gates |
| Voltage-sense flexibility | IN pin accepts user-defined trip point via resistor divider; supports monitoring of 3.3V, 5V, or higher supplies (e.g., 12V) with proper scaling |
| No external timing components | All timing (reset delay, watchdog timeout, NMI pulse) is factory-trimmed and temperature-compensated-no capacitors or resistors needed |
| Industrial-grade reliability | Specified over –40°C to +85°C with 100 µV hysteresis on NMI and 5 µs noise immunity-robust against EMI and supply transients |
| Pin compatibility | Direct drop-in replacement for MAX705/MAX706 in SOIC-8 footprint-enables legacy design upgrades without PCB revision |
Applications
| Industrial PLC Controller | Medical Diagnostic Equipment |
|---|---|
|
Use Scenario: Microcontroller-based PLC executes cyclic control tasks in factory automation; subject to voltage sags from motor switching and EMI. IC Role / Device Role / Timing Role: DS1706RESA/T&R monitors 3.3V core supply and generates /RST on dropout, while NMI alerts firmware to initiate safe shutdown before reset. Use Value: Prevents corrupted I/O state and EEPROM writes during brownout; 130 ms reset hold ensures clean restart after transient recovery. |
Use Scenario: Portable ultrasound unit uses ARM Cortex-M7 MCU powered by regulated 3.3V rail; battery voltage decay must trigger graceful data save before power loss. IC Role / Device Role / Timing Role: DS1706RESA/T&R senses upstream 12V battery via IN pin divider and asserts NMI at 10.2V, allowing 200+ ms for flash storage commit before /RST. Use Value: Enables deterministic, hardware-triggered shutdown sequence-no reliance on software polling or battery fuel gauges. |
| Network Edge Router | Smart Energy Meter |
|
Use Scenario: Dual-core MIPS router runs Linux; watchdog supervision prevents silent hangs during packet processing under thermal stress. IC Role / Device Role / Timing Role: DS1706RESA/T&R receives periodic ST strobes from GPIO; /WDS activates on missed strobe, triggering kernel panic handler or hardware reboot. Use Value: Guarantees recovery from firmware deadlock without manual intervention-meets carrier-grade 99.999% uptime requirements. |
Use Scenario: ANSI C12.22-compliant meter logs consumption data to FRAM; power interruption during write risks data corruption. IC Role / Device Role / Timing Role: DS1706RESA/T&R monitors 3.3V rail derived from supercapacitor backup; asserts /RST only after capacitor voltage falls below 2.85V. Use Value: Ensures FRAM write completion window is preserved-no partial records or lost timestamps due to premature reset. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor and watchdog applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX706ESA+ | 5V ±10% VCC trip (4.25–4.50 V); no IN pin; fixed /RST only; same SOIC-8 package | Lacks external voltage sensing and NMI-suitable only for simple 5V supply monitoring without early warning | Select when cost-sensitive 5V-only designs require basic reset without watchdog or sense flexibility |
| TPS3808G33DBVR | 3.3V ±2% trip (3.23–3.37 V); adjustable watchdog timeout (1.25 ms–10 s); no NMI or PBRST | Higher accuracy but no pushbutton interface or non-maskable interrupt-requires external logic for manual reset | Choose for precision 3.3V monitoring where tight tolerance outweighs need for NMI/PBRST features |
Compared with MAX706ESA+ and TPS3808G33DBVR, DS1706RESA/T&R uniquely combines 3.3V ±20% monitoring, NMI early-warning, pushbutton reset, and watchdog in one SOIC-8 device-making it optimal for industrial systems requiring layered fault response without BOM expansion.
Availability
DS1706RESA/T&R is available at Aetrix Electronics and suitable for industrial PLC controllers, medical diagnostic equipment, network edge routers, smart energy meters, and automotive body control modules requiring stable component supply and long-term lifecycle support.
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) is a semiconductor company specializing in analog, mixed-signal, and power management ICs for industrial, communications, and computing applications.
The DS1706RESA/T&R belongs to the MicroMonitor™ family-designed specifically for robust, multi-layered microprocessor supervision in harsh environments where power integrity, software reliability, and manual intervention must be hardware-guaranteed.
FAQ
What is the exact VCC trip point range for DS1706RESA/T&R?
The DS1706RESA/T&R has a guaranteed VCC trip point of 2.85 V (min), 2.93 V (typ), and 3.00 V (max)-corresponding to ±20% tolerance around 3.3V nominal. This range is fully characterized over –40°C to +85°C and applies directly to the DS1706RESA/T&R variant as confirmed in the official ordering table and DC electrical characteristics section.
Does DS1706RESA/T&R provide both active-high and active-low reset outputs?
No. DS1706RESA/T&R provides only an active-low reset output (/RST) and an active-low watchdog status output (/WDS). The datasheet explicitly lists DS1706RESA/T&R under "3.3V-20% MONITOR, /RST, /WDS" in the Ordering Information table-confirming absence of *RST (active-high) output, which is present only on DS1706L and DS1706P variants.
Can DS1706RESA/T&R monitor a 5V supply using its IN pin?
Yes. The IN pin is a high-impedance input with a fixed 1.25 V trip threshold. By using an external resistor divider (e.g., R1 = 26 kΩ, R2 = 10 kΩ), DS1706RESA/T&R can monitor a 5V supply-detecting decay at 4.50 V (as shown in Figure 5 example). The maximum allowable input voltage at IN is limited to VCC, so the divider must scale the monitored voltage to ≤3.3V.
What is the watchdog timeout behavior of DS1706RESA/T&R?
The DS1706RESA/T&R watchdog times out 1.0–2.2 seconds after the last ST input low-to-high transition. Upon timeout, /WDS is driven low for ≥130 ms. The timer starts when /RST becomes inactive (i.e., after power-up stabilization), and resets on each ST falling edge-enabling reliable detection of software hangs without firmware changes.
Is DS1706RESA/T&R pin-compatible with MAX706ESA?
Yes. DS1706RESA/T&R is explicitly stated as pin-compatible with MAX705/MAX706 in 8-pin SOIC packages. Both share identical pinout (PBRST, VCC, GND, IN, NMI, ST, /RST, /WDS), same SOIC-8 mechanical dimensions (150-mil), and compatible voltage/current specs-allowing direct substitution without PCB layout changes.
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:
- Obsolete
- 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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