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:4,843
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 active-low reset (/RST), watchdog status output (/WDS), non-maskable interrupt (NMI), and pushbutton reset debouncing - designed to halt and restart microprocessors during power transients or software faults in industrial embedded systems.
For engineers reviewing the DS1706REPA datasheet, DS1706REPA pinout, DS1706REPA application, or DS1706REPA equivalent, this device delivers confirmed 130 ms minimum reset pulse width, 1.0 s watchdog timeout, 1.25 V IN-pin trip point, -40°C to +85°C operation, and pin compatibility with MAX705/MAX706 for drop-in replacement in legacy 3.3V microcontroller monitoring designs.
Technical Context
The DS1706REPA integrates three independent monitoring functions: (1) VCC supply supervision with 3.3V ±20% trip point (VCCTP = 2.55–2.70 V), (2) external voltage sensing via high-impedance IN pin referenced to 1.25 V internal bandgap, and (3) watchdog timer triggered by ST input with 1.0–2.2 s timeout and 130 ms /WDS active-low pulse on timeout.
Its reset logic asserts /RST low for ≥130 ms on power-up or VCC dropout, while NMI provides early warning of supply decay with 200 µs pulse and 100 µV hysteresis; PBRST input is internally pulled up (40 kΩ typical) and debounced to guarantee ≥130 ms /RST pulse upon button release.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Trip Point | 2.55–2.70 V (3.3V ±20% tolerance; enables reliable reset assertion for 3.0V system rails) |
| Reset Pulse Width | ≥130 ms (ensures full microprocessor stabilization after power recovery or pushbutton event) |
| Watchdog Timeout | 1.0–2.2 s (configurable via ST strobe frequency; guarantees firmware liveliness detection) |
| IN Pin Trip Voltage | 1.20–1.30 V (precision bandgap-referenced sense point for custom upstream voltage monitoring) |
| Operating Temp Range | -40°C to +85°C (supports industrial-grade deployment without derating) |
| Supply Current | 50 µA @ VCC < 3.6 V (ultra-low quiescent current preserves battery or standby power) |
| NMI Pulse Width | ≥200 µs (provides sufficient timing margin for interrupt service routine entry) |
Pinout & Package
DS1706REPA is housed in an 8-pin plastic DIP (300-mil) package with through-hole mounting and industrial temperature rating (-40°C to +85°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PBRST | Pushbutton Reset Input | Active-low, internally pulled up (40 kΩ); debounced to generate ≥130 ms /RST pulse on release |
| VCC | Power Supply Input | Primary 3.3V supply rail; monitored for ±20% dropout and used as reference for all I/O thresholds |
| GND | Ground Reference | System ground return path for all internal comparators, timers, and outputs |
| IN | External Voltage Sense Input | High-impedance (≤1 µA leakage) input referenced to 1.25 V internal bandgap; supports resistor-divider monitoring of higher-voltage rails |
| NMI | Non-Maskable Interrupt Output | Open-drain, active-low pulse (≥200 µs) signaling early power failure at upstream sense point |
| ST | Watchdog Strobe Input | Active-low input (internally pulled up 180 kΩ); reset watchdog timer on each falling edge; timeout if no edge within 1.0–2.2 s |
| RST | Active-Low Reset Output | Open-drain, active-low reset signal asserted ≥130 ms on power-up, VCC dropout, or PBRST event |
| WDS | Watchdog Status Output | Open-drain, active-low signal pulsed ≥130 ms when watchdog times out due to missing ST strobes |
Key Features
| Feature | Design Value |
|---|---|
| Triple-Function Supervision | Simultaneous VCC monitoring, external voltage sensing (IN), and watchdog timer (ST/WDS) in single 8-pin IC |
| Guaranteed Reset Timing | 130 ms minimum /RST assertion ensures robust microprocessor initialization across temperature and supply variations |
| Configurable Watchdog | 1.0–2.2 s timeout window allows tuning to firmware execution cycles without external components |
| Early Power-Fail Warning | NMI output provides 200 µs interrupt before /RST activation, enabling controlled data save or state preservation |
| Pushbutton Debounce | Hardware-based PBRST debouncing eliminates need for external RC networks or firmware polling |
Applications
| Industrial PLC Controller | Medical Infusion Pump |
|---|---|
|
Use Scenario: Continuous operation in factory-floor automation where brownouts or EMI may stall firmware execution. IC Role / Device Role / Timing Role: Microprocessor supervisor providing VCC monitoring, NMI-triggered safe shutdown, and watchdog-enforced firmware recovery. Use Value: Prevents uncontrolled motor actuation or I/O misstates by forcing hard reset within 130 ms of fault detection. |
Use Scenario: Battery-powered infusion pump requiring fail-safe behavior during low-battery voltage sag or software hang. IC Role / Device Role / Timing Role: System-level watchdog and reset generator ensuring delivery accuracy and patient safety compliance. Use Value: Guarantees 130 ms /RST pulse and 200 µs NMI alert to initiate alarm logging and motor stop before critical threshold breach. |
| Point-of-Sale Terminal | Smart Energy Meter |
|
Use Scenario: Unattended retail kiosk exposed to grid fluctuations and thermal cycling in commercial environments. IC Role / Device Role / Timing Role: Power integrity monitor asserting /RST on 3.3V rail dropout and validating firmware liveness via ST strobe. Use Value: Eliminates need for discrete reset IC + external watchdog circuit, reducing BOM count and board area by 30%. |
Use Scenario: ANSI C12.20-compliant meter operating in outdoor substations with wide ambient temperature swings. IC Role / Device Role / Timing Role: Dual-rail supervisor using IN pin to monitor auxiliary 5V DC-DC output while supervising main 3.3V MCU rail. Use Value: Enables early NMI warning from upstream supply degradation, allowing time-stamped event logging prior to full reset. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX706ESA | 5V ±10% VCC trip (4.25–4.50 V); no IN pin; identical /RST, /WDS, NMI, ST, PBRST pinout and timing | Designed for 5V systems only; lacks external voltage sensing capability | Select for 5V-only designs where upstream rail monitoring is unnecessary and MAX706 footprint is required |
| TPS3808G18DBVR | 3.3V ±2% trip (3.23–3.37 V); fixed 200 ms reset delay; no NMI or watchdog; SOT-23-6 package | Single-function reset IC; no early warning or firmware liveliness checking | Choose when only precise power-on reset is needed and board space is constrained; not suitable for watchdog/NMI use cases |
Compared with MAX706ESA and TPS3808G18DBVR, DS1706REPA uniquely combines 3.3V ±20% supervision, hardware watchdog, NMI early warning, and external voltage sensing in one 8-pin DIP - making it irreplaceable for safety-critical industrial systems requiring layered fault detection.
Availability
DS1706REPA is available at Aetrix Electronics and suitable for industrial PLC controllers, medical infusion pumps, point-of-sale terminals, smart energy meters, and telecom remote units requiring stable component supply across extended temperature ranges and long production lifecycles.
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) is a semiconductor company specializing in analog, mixed-signal, and power management ICs for industrial, automotive, and communications applications.
The DS1705/DS1706 family was engineered to replace discrete reset circuits in microprocessor-based systems, delivering integrated power monitoring, watchdog, and pushbutton control in a single 8-pin package for rugged industrial deployment.
FAQ
What is the exact VCC trip point range for DS1706REPA?
The DS1706REPA has a guaranteed VCC trip point of 2.55 V (min) to 2.70 V (max), corresponding to 3.3V ±20% tolerance. This range is validated across -40°C to +85°C and ensures reliable reset assertion when the 3.3V supply drops below 2.55 V. The DS1706REPA datasheet specifies VCCTP = 2.55/2.63/2.70 V (min/typ/max) under recommended operating conditions.
Does DS1706REPA support external voltage monitoring beyond its VCC pin?
Yes, DS1706REPA supports external voltage monitoring via its IN pin, which triggers NMI when the sensed voltage crosses 1.25 V (1.20–1.30 V range). Using an external resistor divider, users can monitor higher-voltage rails (e.g., 5V, 12V) upstream of the 3.3V regulator. The DS1706REPA's high-impedance IN input (≤1 µA leakage) minimizes loading on the divider network.
What is the watchdog timeout behavior of DS1706REPA?
The DS1706REPA watchdog timer times out between 1.0 s (min) and 2.2 s (max) if the ST input is not strobed low before expiration. Upon timeout, DS1706REPA drives /WDS low for ≥130 ms. The timer resets on each ST falling edge and begins timing anew - enabling firmware to maintain watchdog health by strobing ST at intervals shorter than 1.0 s.
Is DS1706REPA pin-compatible with MAX705/MAX706 devices?
Yes, DS1706REPA is pin-compatible with MAX705 and MAX706 in 8-pin DIP, SOIC, and µSOP packages. All signal names (PBRST, VCC, GND, IN, NMI, ST, RST, WDS), pin positions, and electrical behaviors match. This allows direct substitution in existing MAX705/MAX706 layouts without PCB changes, provided the 3.3V ±20% trip point meets system requirements.
How does DS1706REPA handle pushbutton reset events?
DS1706REPA debounces the PBRST input internally and guarantees a /RST pulse width of ≥130 ms upon button release. PBRST is active-low and internally pulled up (40 kΩ typical). The DS1706REPA timing specification tPDLY = 250 ns ensures minimal propagation delay from PBRST release to /RST assertion, eliminating need for external RC filtering or firmware debounce routines.
DS1706REPA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- MicroMonitor™
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- 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…
