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Analog Devices Inc./Maxim Integrated MAX6706TKA-T
- Part No.:
- MAX6706TKA-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6706TKA-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:10,000
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Product details
Overview
MAX6706TKA-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 down to VCC = 1V, 140ms reset timeout delay, 0.62V power-fail comparator input, and independent watchdog timer with 1.6s timeout - enabling reliable power-up sequencing and brownout recovery in industrial controllers and telecom equipment.
For engineers reviewing the MAX6706TKA-T datasheet, MAX6706TKA-T pinout, MAX6706TKA-T application, or MAX6706TKA-T equivalent, this device supports precise +3.3V/+2.5V supply supervision with manual reset input, power-fail warning, and watchdog fault detection - critical for deterministic reset behavior in white goods and intelligent instrumentation.
Technical Context
The MAX6706TKA-T implements a dedicated reset generator with internal 0.62V reference, monitoring VCC only (not RST_IN1/RST_IN2), and asserts an active-high RESET output when VCC falls below its factory-trimmed threshold (3.08V typ). Its watchdog circuit monitors WDI transitions and asserts WDO low on timeout, while MR forces reset independently.
This A-version variant deasserts WDO immediately upon VCC recovery (no timeout delay), unlike standard versions; it also features push-pull RESET output and integrated 50kΩ MR pullup - eliminating external components for basic supervision in space-constrained SOT23-8 designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 3.08V (typ), ±3% over -40°C to +125°C - ensures stable reset assertion for +3.3V systems under temperature variation |
| Reset Timeout Period | 140ms (min) - guarantees µP initialization completes before release of reset signal |
| Watchdog Timeout | 1.6s (typ) - provides sufficient margin for firmware watchdog servicing without false triggers |
| Supply Current | 9µA (typ) at VCC < 3.6V - enables ultra-low-power operation in battery-backed or energy-sensitive applications |
| Operating Voltage Range | 1.2V to 5.5V - supports valid reset assertion even during deep brownout conditions down to 1.2V |
| Power-Fail Input Threshold | 0.62V (typ), 6mV hysteresis - allows accurate early-warning detection of secondary supply collapse via external resistor divider |
| MR Input Pullup | 50kΩ internal - eliminates need for external pullup resistor in manual reset switch interface |
Pinout & Package
MAX6706TKA-T is housed in an 8-pin SOT23 package (package code K8+2), measuring 2.9mm × 1.6mm × 1.1mm, RoHS-compliant, with lead-free option available as MAX6706TKA+T.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 MR | Active-low manual reset input | CMOS-compatible input with internal 50kΩ pullup to VCC; pulling low forces active-high RESET assertion for ≥140ms |
| 2 VCC | Main supply input | Primary voltage monitored for reset generation; powers push-pull outputs; valid from 1.2V to 5.5V |
| 3 GND | Ground reference | Common return path for all internal circuits and output drivers |
| 4 PFI | Power-fail monitor input | High-impedance node tied to 0.62V internal reference; used with external resistor divider to detect auxiliary supply collapse |
| 5 PFO | Power-fail output | Active-low push-pull output asserted when PFI < 0.62V - directly drives µP interrupt or status flag |
| 6 WDI | Watchdog input | Edge-sensitive input; rising or falling edge clears watchdog timer; no response to static high/low beyond 1.6s |
| 7 RESET | Active-high reset output | Push-pull output asserted high during reset condition; remains high for full 140ms after VCC recovery |
| 8 WDO | Watchdog output | Active-low push-pull output asserted on watchdog timeout or VCC undervoltage; deasserts immediately upon VCC recovery (A-version behavior) |
Key Features
| Feature | Design Value |
|---|---|
| Active-high push-pull RESET | Eliminates need for external pullup resistor and simplifies interface with µP reset inputs requiring high-active assertion |
| Guaranteed reset validity to VCC = 1V | Ensures deterministic reset state during deep brownout, preventing undefined µP behavior before complete power loss |
| Independent PFI/PFO comparator | Enables early power-fail warning on secondary rails (e.g., backup battery, I/O supply) without affecting primary reset timing |
| 1.6s watchdog timeout with immediate WDO deassertion on recovery (A-version) | Reduces system downtime by releasing watchdog fault signal as soon as VCC stabilizes - no fixed delay penalty |
| Internal 50kΩ MR pullup | Supports direct connection of momentary switch between MR and GND - no BOM additions required for manual reset function |
Applications
| Industrial Controllers | Telecommunications Equipment |
|---|---|
Use Scenario: Monitoring +3.3V core supply in PLC I/O modules subject to transient line disturbances. IC Role / Device Role / Timing Role: Supervisory IC providing active-high RESET pulse and PFO-driven NMI interrupt on auxiliary 5V rail collapse. Use Value: Prevents spurious execution during brownout via guaranteed 140ms reset hold time and 0.62V PFI sensitivity. |
Use Scenario: Power supervision in Ethernet switch management ASICs with dual-voltage domains. IC Role / Device Role / Timing Role: Single-supply supervisor asserting RESET high on main 3.3V rail failure and generating PFO interrupt for orderly shutdown. Use Value: Enables deterministic boot sequence and graceful power-down using independent PFI/PFO path without µP intervention. |
| White Goods Control Boards | Intelligent Instrumentation |
Use Scenario: Reset coordination in refrigerator main control board with 3.3V MCU and 5V sensor interface supply. IC Role / Device Role / Timing Role: Active-high RESET generator synchronized to VCC drop, plus WDO monitoring firmware liveness via WDI toggling. Use Value: Guarantees safe MCU reset during AC line sags and detects software hangs via 1.6s watchdog window. |
Use Scenario: Power integrity assurance in portable multimeter with lithium coin-cell backup. IC Role / Device Role / Timing Role: Low-quiescent-current (9µA) supervisor maintaining reset assertion during battery-only operation down to 1.2V. Use Value: Extends usable battery life while ensuring reliable reset behavior across full operating temperature range (-40°C to +125°C). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6706TKA+T | Identical electrical specs and pinout; lead-free packaging (RoHS-compliant) vs. leaded -T suffix | No functional difference; selected when lead-free compliance is required for final assembly | Direct replacement where Pb-free manufacturing is mandated; same thermal and electrical performance |
| MAX6702TKA-T | Same package and temperature range, but active-high RESET with different threshold (4.38V typ) and no PFI/PFO | Suitable for +5V systems requiring only primary supply monitoring, not power-fail warning | Choose when supervising higher-voltage rails without auxiliary supply monitoring needs - reduces feature set and cost |
Compared with MAX6706TKA-T, MAX6706TKA+T offers identical supervision functionality in RoHS-compliant packaging, while MAX6702TKA-T provides higher-threshold reset for +5V systems but omits power-fail detection - making MAX6706TKA-T optimal for +3.3V designs needing both reset and early warning capability.
Availability
MAX6706TKA-T is available at Aetrix Electronics and suitable for industrial controllers, telecommunications equipment, and intelligent instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6706TKA-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 power, sensing, and connectivity applications, with emphasis on reliability and integration.
The MAX6701–MAX6708 family targets microprocessor supervision in harsh environments, delivering compact, low-power, multi-function reset solutions for automotive-qualified, industrial, and telecom-grade systems.
FAQ
What is the reset threshold voltage for MAX6706TKA-T?
The MAX6706TKA-T has a factory-trimmed VCC reset threshold of 3.08V (typical), with ±3% tolerance over -40°C to +125°C. This value corresponds to the 'T' suffix in the Threshold Suffix Guide and is optimized for reliable supervision of +3.3V supply rails under wide temperature and voltage variation.
Does MAX6706TKA-T support power-fail detection on auxiliary supplies?
Yes, MAX6706TKA-T includes a dedicated PFI input referenced to an internal 0.62V comparator and a corresponding PFO output. By connecting PFI to a resistor divider from an auxiliary supply (e.g., 5V or 12V rail), the device generates an active-low PFO signal when that supply drops below the calculated trip point - enabling early warning and controlled shutdown.
How does the watchdog timer behave in MAX6706TKA-T?
The MAX6706TKA-T watchdog timer requires a WDI edge transition every 1.6s (typical) to remain cleared. If no edge occurs, WDO asserts low. As an A-version device, WDO deasserts immediately upon VCC recovery or a valid WDI edge - unlike non-A versions which require timeout expiration before deassertion.
What is the function of the MR pin on MAX6706TKA-T?
The MR pin on MAX6706TKA-T is an active-low manual reset input with an internal 50kΩ pullup to VCC. Pulling MR low forces the active-high RESET output high for the full 140ms timeout period, regardless of VCC level - enabling pushbutton-initiated resets or firmware-triggered recovery sequences.
Is MAX6706TKA-T compatible with 1.8V logic interfaces?
Yes, MAX6706TKA-T operates with VCC as low as 1.2V and guarantees RESET validity down to 1V. Its MR, WDI, and PFI inputs accept logic levels referenced to VCC (VIH = 0.7×VCC, VIL = 0.3×VCC), making it fully compatible with 1.8V systems when powered from a 1.8V supply - with appropriate threshold selection via suffix.
MAX6706TKA-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-8
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 3.08V, Adj
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-8
MAX6706TKA-T FAQ
1.How can I place an order for MAX6706TKA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6706TKA-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 MAX6706TKA-T reliable?
The price and inventory of MAX6706TKA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6706TKA-T is usually 5 days.
3.What payment methods are accepted for MAX6706TKA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6706TKA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6706TKA-T?
MAX6706TKA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6706TKA-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 MAX6706TKA-T?
For technical support, including MAX6706TKA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6706TKA-T requirements.
6.How does Aetrix verify that MAX6706TKA-T is sourced from the original manufacturer or authorized distributors?
All MAX6706TKA-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 MAX6706TKA-T meets industry standards.
7.What is the process for return or replacement of MAX6706TKA-T?
All MAX6706TKA-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6706TKA-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 MAX6706TKA-T part is unused and in its original packaging.
Return procedure for MAX6706TKA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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