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Analog Devices Inc./Maxim Integrated MAX6706ARKA+T
- Part No.:
- MAX6706ARKA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6706ARKA+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MAX6706ARKA+T from Maxim Integrated is an active-high push-pull microprocessor supervisory IC designed for single-supply voltage monitoring in embedded systems. It provides a guaranteed-reset output during power-up, brownout, and power-down; independent watchdog timeout (1.6s); 0.62V precision power-fail comparator input with active-low push-pull PFO output; manual reset input with internal 50kΩ pullup; and operates down to VCC = 1.0V. It is used in critical µP power monitoring for industrial controllers and intelligent instruments.
For engineers reviewing the MAX6706ARKA+T datasheet, MAX6706ARKA+T pinout, MAX6706ARKA+T application, or MAX6706ARKA+T equivalent, this page delivers verified functional identity, exact reset threshold (3.08V), watchdog behavior, power-fail warning timing, and real-world design implications - all confirmed from Maxim's official MAX6701–MAX6708 family datasheet Rev 4 (2014).
Technical Context
The MAX6706ARKA+T implements a dual-comparator architecture: one fixed-threshold monitor for VCC (3.08V nominal) and one independent 0.62V reference-based comparator for PFI/PFO. Its reset generator asserts active-high RESET for ≥140ms after VCC rises above threshold or MR release, with guaranteed validity down to VCC = 1.0V.
The integrated watchdog timer triggers WDO low if WDI remains static beyond 1.6s (typ), and WDO deasserts immediately upon valid WDI edge or MR assertion - a key distinction from non-A versions. All outputs (RESET, WDO, PFO) are push-pull, eliminating external pullups.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold (VCC) | 3.08V ±0.07V (T-suffix); ensures reliable reset assertion for +3.3V systems under temperature variation (-40°C to +125°C) |
| Reset Timeout Period | 140–300ms; guarantees µP initialization time meets typical boot requirements without external timing components |
| Watchdog Timeout | 1.6s (typ), 0.96–2.52s over full temp range; provides robust firmware activity supervision with minimal false triggers |
| Power-Fail Input Threshold | 0.62V ±9mV; enables precise early-warning detection of supply droop via external resistor divider |
| Supply Current | 9–20µA at VCC < 3.6V; supports ultra-low-power operation in battery-backed or energy-constrained applications |
| Operating Voltage Range | 1.0V to 5.5V; allows valid reset assertion even during deep brownout, preventing undefined µP state |
| Output Type | Active-high push-pull RESET and WDO; eliminates need for external pull resistors and reduces BOM count |
Pinout & Package
MAX6706ARKA+T is housed in an 8-pin SOT23 package (package code K8+2), measuring 2.9mm × 1.6mm × 1.1mm, RoHS-compliant and lead-free (denoted by "+T").
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 MR | Active-low manual reset input | CMOS-compatible input with internal 50kΩ pullup to VCC; debounces pushbutton resets and enables watchdog-triggered reset when WDO is connected |
| 2 VCC | Main supply input | Power source for internal comparators and push-pull outputs; also serves as primary reset monitor input |
| 3 GND | Ground reference | Common return path for all analog and digital circuitry; must be low-impedance for accurate threshold detection |
| 4 PFI | Power-fail comparator input | High-impedance (±200nA leakage) node for external voltage divider; trips at 0.62V to enable pre-failure warning |
| 5 PFO | Power-fail output | Active-low push-pull output; asserts when PFI < 0.62V, usable for µP interrupt or orderly shutdown sequencing |
| 6 WDI | Watchdog input | Edge-sensitive input; any rising/falling transition clears watchdog timer; 50ns minimum pulse width supported |
| 7 RESET | Active-high reset output | Push-pull output asserted high during reset condition; valid down to VCC = 1.0V, compatible with most µP reset inputs |
| 8 WDO | Watchdog output | Active-low push-pull output; latched low on timeout or undervoltage, deasserted instantly on WDI edge or MR low |
Key Features
| Feature | Design Value |
|---|---|
| Active-high push-pull RESET | Eliminates external pullup resistor, reduces layout area, and ensures fast, rail-to-rail reset assertion without weak-drive limitations |
| Independent PFI/PFO comparator | Enables system-level power-fail warning at user-defined voltage (e.g., 4.8V on 5V rail) with <1µs response delay |
| A-version watchdog behavior | WDO deasserts immediately upon recovery from undervoltage - no timeout delay - improving system responsiveness vs. standard versions |
| Guaranteed operation down to VCC = 1.0V | Ensures deterministic reset state during deep brownout, preventing µP lockup or corrupted memory writes |
| Immunity to short VCC transients | Rejects <100ns glitches on VCC, avoiding spurious resets in electrically noisy environments like motor drives or switching supplies |
Applications
| Industrial Controllers | Intelligent Instruments |
|---|---|
Use Scenario: PLCs and motion controllers operating in factory environments with fluctuating 24VDC supplies and EMI noise. IC Role / Device Role / Timing Role: Supervises main 3.3V logic rail and generates clean, glitch-immune reset signal; PFI monitors auxiliary 5V supply for early brownout warning. Use Value: Prevents firmware crashes during line sags by asserting RESET before µP enters undefined state, while PFO triggers controlled I/O shutdown. |
Use Scenario: Portable handheld test equipment with Li-ion battery and dual-rail (3.3V/5V) power architecture. IC Role / Device Role / Timing Role: Monitors 3.3V core supply (VCC) and 5V analog supply (via PFI) to ensure both rails stabilize before µP boot. Use Value: Guarantees synchronized startup across domains; 140ms reset timeout accommodates slow LDO settling, avoiding premature execution. |
| Critical µP Power Monitoring | Networking Equipment |
Use Scenario: Base station control modules requiring fail-safe reboot on AC loss or DC/DC converter fault. IC Role / Device Role / Timing Role: Provides dual-fault detection: VCC brownout (3.08V threshold) and backup rail collapse (via PFI), with independent WDO for watchdog escalation. Use Value: Enables layered fault response - PFO interrupts µP for graceful save, while WDO forces hard reset if firmware fails to service watchdog. |
Use Scenario: Ethernet switches with PoE-powered management processors subject to transient surges and thermal derating. IC Role / Device Role / Timing Role: Supervises 3.3V management processor supply and uses MR for remote reset via GPIO; WDO tied to NMI for firmware hang detection. Use Value: Push-pull outputs drive long PCB traces without signal degradation; 1.6s watchdog period balances responsiveness and noise immunity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6706AKA+T | Same A-version functionality but with 2.93V reset threshold (S-suffix); otherwise identical pinout, timing, and features | Suitable for +3.0V systems instead of +3.3V; requires recalculating PFI divider for same trip point | Select when tighter margin against 3.0V rail dropout is required; verify compatibility with µP reset threshold spec. |
| TPS3808G33DBVR | TI part with 3.3V reset threshold, 200ms timeout, open-drain RESET, no PFI/PFO, no watchdog output | Lacks power-fail warning and independent watchdog - only basic reset supervision | Choose only if PFI/PFO and WDO functions are unused; requires external pullup and cannot replace MAX6706ARKA+T feature-for-feature. |
Compared with MAX6706AKA+T, the MAX6706ARKA+T offers higher reset threshold (3.08V vs. 2.93V) for improved noise margin on nominal 3.3V rails, while retaining identical watchdog behavior and PFI/PFO capability; versus TPS3808G33DBVR, it delivers integrated power-fail warning and latched watchdog output - eliminating two discrete components.
Availability
MAX6706ARKA+T is available at Aetrix Electronics and suitable for industrial controllers, intelligent instruments, critical µP power monitoring, networking equipment, and telecommunications infrastructure requiring stable component supply across extended temperature ranges.
Supply support for MAX6706ARKA+T 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 demanding industrial, communications, and computing applications.
The MAX6701–MAX6708 family was engineered specifically for space-constrained, multivoltage µP systems needing integrated reset, watchdog, and power-fail warning - reducing discrete count while guaranteeing operation down to 1.0V.
FAQ
What is the exact reset threshold voltage for MAX6706ARKA+T?
The MAX6706ARKA+T has a nominal VCC reset threshold of 3.08V, with tolerance of ±0.07V over -40°C to +125°C. This corresponds to the "T" suffix in Maxim's Threshold Suffix Guide and is optimized for reliable supervision of +3.3V supply rails under worst-case temperature and voltage drift conditions. The threshold is internally trimmed and does not require external calibration.
Does MAX6706ARKA+T support active-high reset output?
Yes, the MAX6706ARKA+T provides an active-high push-pull RESET output (pin 7), unlike MAX6706KA+T which offers active-low. This matches µP reset inputs requiring high-assertion logic, eliminates external pullup resistors, and ensures fast, strong drive capability across its full 1.0V–5.5V operating range - including down to VCC = 1.0V.
How does the watchdog function differ between MAX6706ARKA+T and non-A versions?
In the MAX6706ARKA+T (A-version), WDO deasserts immediately when VCC recovers above threshold - no timeout delay - whereas non-A versions hold WDO low until a valid WDI edge occurs. Additionally, pulling MR low deasserts WDO in the A-version, enabling software-controlled watchdog reset without toggling WDI. This improves system responsiveness and debug flexibility.
Can MAX6706ARKA+T monitor a secondary supply voltage besides VCC?
Yes, MAX6706ARKA+T includes a dedicated PFI input (pin 4) with a precise 0.62V internal reference. By connecting an external resistor divider from a secondary supply (e.g., 5V or 12V rail) to PFI, users can configure early power-fail warning at any desired voltage. PFO (pin 5) then asserts low to signal the event, enabling µP-initiated graceful shutdown before complete failure.
What package and environmental rating does MAX6706ARKA+T use?
MAX6706ARKA+T is supplied in an 8-pin SOT23 package (K8+2 outline), RoHS-compliant and lead-free, indicated by the "+T" suffix. It is rated for operation from -40°C to +125°C ambient temperature, with guaranteed electrical performance across this full industrial grade range - validated per Maxim's datasheet Rev 4 specifications.
MAX6706ARKA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-8
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 2.63V, Adj
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-8
MAX6706ARKA+T FAQ
1.How can I place an order for MAX6706ARKA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6706ARKA+T 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 MAX6706ARKA+T reliable?
The price and inventory of MAX6706ARKA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6706ARKA+T is usually 5 days.
3.What payment methods are accepted for MAX6706ARKA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6706ARKA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6706ARKA+T?
MAX6706ARKA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6706ARKA+T 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 MAX6706ARKA+T?
For technical support, including MAX6706ARKA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6706ARKA+T requirements.
6.How does Aetrix verify that MAX6706ARKA+T is sourced from the original manufacturer or authorized distributors?
All MAX6706ARKA+T 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 MAX6706ARKA+T meets industry standards.
7.What is the process for return or replacement of MAX6706ARKA+T?
All MAX6706ARKA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6706ARKA+T, 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 MAX6706ARKA+T part is unused and in its original packaging.
Return procedure for MAX6706ARKA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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