My Inquiry
My Account
Analog Devices Inc./Maxim Integrated DS1706REPA+
- Part No.:
- DS1706REPA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
DS1706REPA+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,122
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
DS1706REPA+ from Maxim Integrated is a 3.3V ±20% precision voltage supervisor IC with watchdog timer, non-maskable interrupt (NMI), and pushbutton reset control - designed to halt and restart out-of-control microprocessors during power transients or software faults in industrial embedded systems. It delivers 130 ms minimum active-low reset pulse width, 1.0 s watchdog timeout, and operates across -40°C to +85°C.
For engineers reviewing the DS1706REPA+ datasheet, DS1706REPA+ pinout, DS1706REPA+ application, or DS1706REPA+ equivalent, key selection criteria include VCC trip point (2.55–2.70 V), /RST and /WDS active-low outputs, PBRST debounced input, NMI early-warning capability, and compatibility with 3.0V system rails using 20% tolerance monitoring.
Technical Context
The DS1706REPA+ integrates three independent supervision functions: (1) VCC monitoring with factory-trimmed 2.63 V typical trip point and hysteresis for reliable power-fail detection; (2) a 1-second watchdog timer triggered by ST strobe input, asserting /WDS on timeout; and (3) NMI generation at IN pin when monitored supply falls below 1.25 V reference, enabling early system shutdown before reset activation.
Its dual-reset architecture supports both /RST (active-low) and optional RST (active-high) variants (not present on DS1706REPA+), while internal 40 kΩ pull-up on PBRST and 180 kΩ pull-up on ST simplify external circuitry. All timing parameters - including 130 ms reset hold time and 200 µs NMI pulse width - are guaranteed over full temperature and voltage range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Trip Point | 2.55–2.70 V (factory-trimmed for 3.3V ±20% systems; enables use with 3.0V rails) |
| Reset Pulse Width | 130–285 ms (guaranteed minimum ensures stable processor boot after power recovery) |
| Watchdog Timeout | 1.0–2.2 s (configurable via ST strobe frequency; prevents runaway code execution) |
| NMI Pulse Width | ≥200 µs (provides deterministic early warning before reset assertion) |
| Operating Temp | -40°C to +85°C (supports industrial-grade reliability without derating) |
| Supply Current | 60 µA max (ultra-low ICC enables battery-backed or energy-sensitive designs) |
| IN Trip Reference | 1.20–1.30 V (precision bandgap-based sense threshold for external voltage monitoring) |
Pinout & Package
DS1706REPA+ is housed in an 8-pin plastic DIP (300-mil) package with through-hole mounting and industry-standard footprint. Pin assignments are fully validated per Maxim's mechanical drawings and functional test reports.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PBRST | Pushbutton Reset Input | Active-low, internally pulled up to VCC (40 kΩ); debounced and timed to generate ≥130 ms /RST pulse on release |
| VCC | Power Supply | Primary supply input (1.2–5.5 V); powers all internal circuits and defines trip thresholds |
| GND | Ground Reference | System ground return path for all analog and digital functions |
| IN | External Voltage Sense Input | High-impedance comparator input referenced to 1.25 V; used to monitor upstream supplies via resistor divider |
| NMI | Non-Maskable Interrupt Output | Active-low open-drain output; pulses ≥200 µs when IN falls below trip point |
| ST | Strobe Input | Active-low watchdog trigger; internal 180 kΩ pull-up; must be toggled ≤1 s to prevent /WDS assertion |
| RST | Active-Low Reset Output | Open-drain /RST output; held active ≥130 ms after VCC recovery or PBRST release |
| WDS | Watchdog Status Output | Active-low open-drain output; asserted for ≥130 ms if ST not strobed within timeout window |
Key Features
| Feature | Design Value |
|---|---|
| 3.3V ±20% VCC Monitoring | Enables robust operation with 3.0V nominal rails while tolerating wide supply variation without external components |
| Guaranteed 130 ms Reset Hold Time | Ensures microprocessor completes power stabilization and internal initialization before release from reset |
| Dual Supervision Paths (VCC + IN) | Allows simultaneous monitoring of local VCC and upstream supply rail for layered fault detection and graceful shutdown |
| Integrated Watchdog Timer | Eliminates need for discrete RC timing or external watchdog ICs; reduces BOM count and board space |
| Debounced Pushbutton Interface | Removes mechanical switch bounce and guarantees consistent reset pulse width regardless of button press duration |
Applications
| Industrial PLC Control | Medical Diagnostic Equipment |
|---|---|
Use Scenario: Microcontroller-based programmable logic controllers operating in factory environments with fluctuating 24V DC-to-3.3V conversion. IC Role / Device Role / Timing Role: Primary voltage supervisor and watchdog enforcer; monitors 3.3V rail and asserts /RST on brownout or software hang. Use Value: Prevents spurious I/O state changes during power transients and ensures deterministic recovery after watchdog timeout or manual reset. | Use Scenario: Portable ultrasound or imaging devices requiring fail-safe boot sequencing and runtime integrity checks. IC Role / Device Role / Timing Role: Dual-role supervisor: monitors main 3.3V supply and senses battery voltage via IN pin for low-battery warning and controlled shutdown. Use Value: NMI provides >200 µs advance warning before /RST activation, allowing critical data save and safe state transition prior to reset. |
| Energy Metering Systems | Smart Grid Communication Modules |
Use Scenario: ANSI C12.20-compliant electricity meters exposed to grid surges and long-term thermal cycling. IC Role / Device Role / Timing Role: System-level reset controller interfacing with metrology SoC; uses ST input driven by real-time clock interrupt to refresh watchdog. Use Value: 1.0 s watchdog timeout aligns with meter firmware heartbeat intervals, detecting stalled communication stacks without false triggers from transient noise. | Use Scenario: Cellular or RF-based grid node modules deployed in unattended outdoor cabinets with variable ambient temperatures. IC Role / Device Role / Timing Role: Power integrity guardian: monitors isolated 3.3V domain and connects PBRST to WDS to auto-restart modem after watchdog-induced failure. Use Value: Eliminates field service visits by enabling autonomous recovery from firmware lockups caused by RF interference or memory corruption. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervision and watchdog applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX706ESA+ | 5.0V ±10% trip point (4.50 V typ); no IN sense input; identical /RST, /WDS, PBRST, ST pinout | Designed for 5V systems only; lacks external voltage monitoring capability via IN pin | Select MAX706ESA+ only when supervising 5V rails and external supply sensing is unnecessary |
| TPS3808G33DBVR | 3.3V ±2% accuracy (tighter tolerance); fixed 200 ms reset delay; no NMI or ST watchdog inputs | Single-function reset IC without watchdog or early-warning interrupt; lower quiescent current (1.1 µA) | Choose TPS3808G33DBVR for cost-sensitive, low-power 3.3V applications where watchdog/NMI features are unused |
Compared with MAX706ESA+ and TPS3808G33DBVR, DS1706REPA+ uniquely combines 3.3V ±20% monitoring, NMI early-warning, and configurable watchdog in one 8-pin DIP - making it optimal for industrial systems requiring layered fault detection and autonomous recovery without layout redesign.
Availability
DS1706REPA+ is available at Aetrix Electronics and suitable for industrial automation, medical diagnostics, energy metering, and smart grid infrastructure requiring stable component supply and long-term lifecycle support.
Supply support for DS1706REPA+ 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 high-performance analog and mixed-signal ICs for industrial, automotive, communications, and computing markets.
The DS1706REPA+ belongs to the MicroMonitor™ family - engineered specifically for microprocessor supervision in harsh environments where power integrity, software reliability, and deterministic recovery are mission-critical.
FAQ
What is the exact VCC trip point range for DS1706REPA+?
The DS1706REPA+ has a guaranteed VCC trip point range of 2.55 V to 2.70 V, with a typical value of 2.63 V. This 3.3V ±20% specification allows reliable operation with 3.0V nominal supply rails and accommodates manufacturing tolerances and temperature drift across the full -40°C to +85°C range. The DS1706REPA+ datasheet confirms this range under DC Electrical Characteristics.
Does DS1706REPA+ provide both active-high and active-low reset outputs?
No, DS1706REPA+ provides only an active-low reset output (/RST). The "R" suffix in DS1706REPA+ denotes the /RST variant; active-high RST output is available only on DS1706LEPA+, DS1706PEPA+, and other "L" or "P" variants. Pin 7 of DS1706REPA+ is dedicated to /RST, and no RST signal is present on this part.
How does the watchdog timer in DS1706REPA+ function, and what is its timeout period?
The DS1706REPA+ watchdog timer starts counting after /RST becomes inactive and times out if the ST input is not strobed low within 1.0 to 2.2 seconds. Upon timeout, the /WDS output is asserted low for ≥130 ms. The ST input is internally pulled up to VCC (180 kΩ), and each high-to-low transition resets the timer. This behavior is verified in the AC Electrical Characteristics table and timing diagrams of the DS1706REPA+ datasheet.
Can DS1706REPA+ monitor voltages other than VCC, and how is that implemented?
Yes, DS1706REPA+ can monitor external voltages via the IN pin, which compares the applied voltage against a precise 1.25 V internal reference. A resistor divider scales higher voltages (e.g., 12V, 24V) down to the 1.20–1.30 V trip window. The DS1706REPA+ datasheet provides the calculation formula and example design in Figure 5, confirming IN's role in upstream supply monitoring for early-warning NMI generation.
Is DS1706REPA+ pin-compatible with other members of the DS1705/DS1706 family?
Yes, DS1706REPA+ is pin-compatible with all 8-pin DIP variants in the DS1705/DS1706 family, including DS1705EPA+, DS1706EPA+, and DS1706LEPA+. Pin assignments for PBRST, VCC, GND, IN, NMI, ST, /RST, and /WDS are identical across these parts. This compatibility is explicitly stated in the "Pin-Compatible with MAX705/MAX706" feature and confirmed in the Pin Assignment diagram for DS1705/DS1706_R/S/T.
DS1706REPA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- MicroMonitor™
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Bulk
- 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:
- Through Hole
- Supplier Device Package:
- 8-PDIP
DS1706REPA+ FAQ
1.How can I place an order for DS1706REPA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1706REPA+ 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 DS1706REPA+ reliable?
The price and inventory of DS1706REPA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1706REPA+ is usually 5 days.
3.What payment methods are accepted for DS1706REPA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1706REPA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1706REPA+?
DS1706REPA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1706REPA+ 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 DS1706REPA+?
For technical support, including DS1706REPA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1706REPA+ requirements.
6.How does Aetrix verify that DS1706REPA+ is sourced from the original manufacturer or authorized distributors?
All DS1706REPA+ 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 DS1706REPA+ meets industry standards.
7.What is the process for return or replacement of DS1706REPA+?
All DS1706REPA+ units undergo pre-shipment inspection (PSI). If there is an issue with DS1706REPA+, 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 DS1706REPA+ part is unused and in its original packaging.
Return procedure for DS1706REPA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DS1706REPA+ Tags
-
MIC826SYMT-TR
Microchip Technology
-
APX803S-31SA-7
Diodes Incorporated
-
APX803L20-29SA-7
Diodes Incorporated
-
TPS3828-33DBVR
Texas Instruments
-
V6340RSP3B+
EM Microelectronic
-
EM6325CXSP5B-2.9+
EM Microelectronic
-
MCP120T-300I/TT
Microchip Technology
-
MCP130T-315I/TT
Microchip Technology
-
MCP120T-475I/TT
Microchip Technology
-
MCP111T-300E/TT
Microchip Technology
-
MCP120T-315I/TT
Microchip Technology
-
MCP809T-315I/TT
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
