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Analog Devices Inc./Maxim Integrated DS1706LESA/T&R
- Part No.:
- DS1706LESA/T&R
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
DS1706LESA/T&R.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,720
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Product details
Overview
DS1706LESA/T&R from Maxim Integrated is a 5.0V ±5% microprocessor supervisory circuit with active-high reset output (RST), watchdog timer, non-maskable interrupt (NMI), and pushbutton reset debouncing. It monitors VCC for power failure, detects upstream supply faults via the IN pin, and delivers guaranteed 130 ms minimum reset pulse width. Used in industrial embedded controllers requiring reliable power-up sequencing and fault recovery.
For engineers reviewing the DS1706LESA/T&R datasheet, DS1706LESA/T&R pinout, DS1706LESA/T&R application, or DS1706LESA/T&R equivalent, key selection criteria include VCC trip point accuracy (4.50–4.75 V), 1 s watchdog timeout, NMI early-warning capability, and SOIC-8 package compatibility with legacy MAX705/MAX706 designs.
Technical Context
The DS1706LESA/T&R integrates three independent monitoring functions: precision VCC threshold detection (VCCTP = 4.50–4.75 V), high-impedance IN-pin voltage sensing (VTP = 1.25 V) for upstream supply monitoring, and a 1-second watchdog timer triggered by ST input transitions. All functions operate across –40°C to +85°C.
It generates RST (active-high) and WDS (active-low) outputs, supports external pushbutton reset with internal debouncing, and provides NMI pulses (≥200 ns, 100 µV hysteresis) for early power-fail warning. Reset remains asserted ≥130 ms after VCC recovery to ensure processor stabilization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Trip Point | 4.50–4.75 V - ensures reset activation before 5.0V system brownout affects CPU operation |
| Reset Pulse Width | 130–285 ms - guarantees sufficient time for power rail and microprocessor stabilization post-power-up |
| Watchdog Timeout | 1.0–2.2 s - provides robust software execution monitoring with margin against timing jitter |
| NMI Pulse Width | ≥200 ns - delivers early, noise-immune warning of impending power failure before reset asserts |
| Supply Current | 60 µA max at VCC < 5.5 V - enables low-power operation in battery-backed or energy-constrained systems |
| Operating Temp | –40°C to +85°C - supports deployment in industrial control cabinets and outdoor embedded equipment |
| IN Pin Trip Voltage | 1.20–1.30 V - allows flexible upstream voltage monitoring using external resistor dividers |
Pinout & Package
DS1706LESA/T&R is supplied in an 8-pin SOIC (150-mil) package with gull-wing leads, RoHS-compliant, tape-and-reel format (T&R). Pin 1 is marked by a beveled corner or dot; pin numbering follows standard SOIC convention (counterclockwise from pin 1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PBRST | Pushbutton Reset Input | Active-low, internally pulled up (40 kΩ); debounced to guarantee ≥130 ms RST assertion on release |
| VCC | Power Supply | Primary supply input (1.2–5.5 V); powers all internal circuits and sets reference thresholds |
| GND | Ground | Reference return for all analog and digital functions; must be low-impedance connection |
| IN | Voltage Sense Input | High-impedance (≤1 µA leakage) comparator input for monitoring upstream supplies via resistor divider |
| NMI | Non-Maskable Interrupt Output | Open-drain, active-low pulse (≥200 ns) signaling early power degradation before reset triggers |
| ST | Strobe Input | Active-low watchdog trigger; high-to-low transition resets 1 s timeout counter |
| RST | Active-High Reset Output | Push-pull, active-high reset signal (not inverted); asserts ≥130 ms during power faults or PBRST events |
| WDS | Watchdog Status Output | Open-drain, active-low status flag pulsed ≥130 ms if ST is not strobed within timeout window |
Key Features
| Feature | Design Value |
|---|---|
| Pin-compatible replacement | Direct SOIC-8 drop-in for MAX705/MAX706 in existing layouts-no PCB redesign required |
| Triple-monitor architecture | Simultaneous VCC, upstream supply (IN), and software execution (ST) monitoring increases system fault coverage |
| Configurable reset polarity | RST output is active-high (DS1706L variant), simplifying interface with processors lacking active-low reset inputs |
| Industrial temperature support | Guaranteed operation from –40°C to +85°C enables use in uncontrolled environmental deployments |
| No external components needed | Integrates precision reference, comparator, timer, and debouncer-replaces discrete reset IC + RC network |
Applications
| Industrial PLC Controller | Medical Diagnostic Equipment |
|---|---|
Use Scenario: Programmable logic controller operating in factory-floor environments with fluctuating 5V rails and EMI exposure. IC Role / Device Role / Timing Role: Supervisory IC providing power-on reset, brownout detection, and watchdog supervision of main MCU firmware execution. Use Value: Prevents erratic behavior during line transients by asserting RST ≥130 ms and issuing NMI ≥200 ns for graceful shutdown routines. |
Use Scenario: Portable ultrasound or imaging device with battery backup and strict uptime requirements. IC Role / Device Role / Timing Role: System-level monitor ensuring safe power-down when main 5V supply decays below 4.50 V or software hangs. Use Value: Enables deterministic recovery via RST and early warning via NMI, meeting IEC 62304 safety-critical timing constraints. |
| Telecom Remote Terminal Unit | Energy Meter Data Logger |
Use Scenario: Outdoor RTU powered from PoE or solar-charged 5V rail, subject to thermal cycling and voltage sags. IC Role / Device Role / Timing Role: Fault detector generating NMI for upstream supply monitoring (via IN pin) and RST for MCU reset during brownouts. Use Value: Extends operational headroom by detecting upstream rail collapse before local VCC fails-enabling pre-failure data save. |
Use Scenario: Smart electricity meter with real-time clock and flash memory, requiring reliable power-cycle recovery. IC Role / Device Role / Timing Role: Power supervisor asserting RST on 5V rail dropout and validating firmware liveness via ST strobe from metering MCU. Use Value: Guarantees EEPROM write completion and RTC synchronization before reset, preventing data corruption. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX706ESA | Active-low RST (/RST), same SOIC-8 package, identical 5V±10% trip point (4.25–4.50 V) | Lacks active-high RST output; requires level-shifting or MCU pin reassignment | Select when legacy design uses /RST and no hardware change is permitted |
| DS1706ESA | Same SOIC-8 footprint and pinout, but active-low RST (/RST) and 5V±10% tolerance (VCCTP = 4.25–4.50 V) | Lower trip point reduces noise margin vs. DS1706LESA/T&R's 4.50–4.75 V range | Choose for cost-sensitive applications where tighter 5% tolerance is not required |
Compared with MAX706ESA and DS1706ESA, DS1706LESA/T&R offers higher VCC trip accuracy (±5% at 4.50–4.75 V) and active-high RST output-eliminating external inverters and improving noise immunity in 5V systems with marginal supply regulation.
Availability
DS1706LESA/T&R is available at Aetrix Electronics and suitable for industrial automation, medical diagnostics, and telecom infrastructure requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for DS1706LESA/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 and mixed-signal ICs for industrial, automotive, and communications applications, emphasizing reliability, integration, and rugged performance.
The DS1706LESA/T&R belongs to the MicroMonitor™ family-engineered specifically for microprocessor-based systems needing coordinated power supervision, watchdog safety, and early-failure warning without external components.
FAQ
What is the exact VCC trip point range for DS1706LESA/T&R?
The DS1706LESA/T&R has a guaranteed VCC trip point (VCCTP) of 4.50 V (min), 4.65 V (typ), and 4.75 V (max) at –40°C to +85°C. This ±5% tolerance around 5.0 V ensures reliable reset assertion before downstream logic errors occur, and is confirmed in the DC Electrical Characteristics table of the official datasheet.
Does DS1706LESA/T&R provide both active-high and active-low reset outputs?
No-DS1706LESA/T&R provides only RST (active-high) and WDS (active-low). The "L" suffix denotes the active-high reset variant. Unlike DS1706ESA (which outputs /RST), DS1706LESA/T&R does not include an active-low reset pin; *RST is not present on this part.
Is DS1706LESA/T&R pin-compatible with MAX705/MAX706 devices?
Yes-DS1706LESA/T&R is pin-compatible with MAX705/MAX706 in 8-pin SOIC (150-mil) packages. Pin assignments (PBRST, VCC, GND, IN, NMI, ST, RST, WDS) match exactly, enabling direct replacement without layout changes per the manufacturer's Pin Assignment diagram.
What is the watchdog timeout specification for DS1706LESA/T&R?
The DS1706LESA/T&R watchdog timeout is specified as 1.0 s (min), 1.6 s (typ), and 2.2 s (max) over temperature. The timer starts when RST becomes inactive and resets on each high-to-low ST transition-ensuring firmware liveliness is verified at least every ~1 second.
Can DS1706LESA/T&R monitor a 3.3V supply?
No-DS1706LESA/T&R is configured for 5.0V ±5% monitoring (VCCTP = 4.50–4.75 V). For 3.3V systems, use DS1706TEUA (3.3V ±5%) or DS1706PEUA (3.3V ±20%). Attempting to use DS1706LESA/T&R on 3.3V will prevent reset assertion, as VCC remains below VCCTP.
DS1706LESA/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:
- 4.65V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 130ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
DS1706LESA/T&R FAQ
1.How can I place an order for DS1706LESA/T&R through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1706LESA/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 DS1706LESA/T&R reliable?
The price and inventory of DS1706LESA/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 DS1706LESA/T&R is usually 5 days.
3.What payment methods are accepted for DS1706LESA/T&R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1706LESA/T&R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1706LESA/T&R?
DS1706LESA/T&R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1706LESA/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 DS1706LESA/T&R?
For technical support, including DS1706LESA/T&R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1706LESA/T&R requirements.
6.How does Aetrix verify that DS1706LESA/T&R is sourced from the original manufacturer or authorized distributors?
All DS1706LESA/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 DS1706LESA/T&R meets industry standards.
7.What is the process for return or replacement of DS1706LESA/T&R?
All DS1706LESA/T&R units undergo pre-shipment inspection (PSI). If there is an issue with DS1706LESA/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 DS1706LESA/T&R part is unused and in its original packaging.
Return procedure for DS1706LESA/T&R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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