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Analog Devices Inc./Maxim Integrated MAX6706SKA
- Part No.:
- MAX6706SKA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6706SKA.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:1,350
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Product details
Overview
MAX6706SKA from Maxim Integrated is an active-high push-pull microprocessor supervisory IC that monitors a single supply voltage, provides independent power-fail detection (0.62V threshold), manual reset input with 50kΩ internal pullup, and a 1.6s watchdog timer with independent WDO output. It operates from 2.1V to 5.5V and guarantees valid reset assertion down to VCC = 1V, suited for embedded controllers requiring reliable brownout and watchdog protection.
For engineers reviewing the MAX6706SKA datasheet, MAX6706SKA pinout, MAX6706SKA application, or MAX6706SKA equivalent, this page delivers verified functional identity, confirmed SOT23-8 package mapping, validated 8-pin terminal roles, exact reset timeout (140ms), watchdog period (1.6s), and two confirmed alternative parts with documented technical and application differences.
Technical Context
The MAX6706SKA implements a dual-comparator architecture: one fixed-threshold monitor for VCC (configured by suffix 'K' = 3.08V) and a separate 0.62V reference comparator for PFI/PFO. Its reset generator asserts active-high RESET for ≥140ms after VCC rises above threshold or MR release.
Watchdog functionality is independent of reset logic: WDO asserts low on 1.6s timeout or undervoltage condition and deasserts only upon valid WDI edge or MR low pulse - not automatically on VCC recovery, distinguishing it from A-version behavior per datasheet timing diagrams.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Operating Range | 2.1V to 5.5V - supports wide-input industrial and automotive rails without external regulation |
| Reset Threshold (VTH) | 3.08V (suffix K) - factory-trimmed precision threshold for +3.3V system monitoring |
| Reset Timeout Period (tRP) | 140ms (typ) - ensures µP initialization completes before release from reset |
| Watchdog Timeout (tWD) | 1.6s (typ) - provides sufficient window for firmware watchdog servicing in real-time systems |
| Power-Fail Threshold | 0.62V (fixed internal reference) - enables accurate early-warning detection via external resistor divider |
| RESET Output Type | Active-high push-pull - eliminates need for external pullup and drives CMOS inputs directly |
| Supply Current (ICC) | 9µA (typ at 3.3V) - ultra-low quiescent current extends battery life in always-on monitoring |
Pinout & Package
MAX6706SKA is housed in an 8-pin SOT23-8 package (JEDEC MO-178 BA), measuring 3.0mm × 1.75mm × 1.3mm, with gull-wing leads and lead-free plating available (replace -T with +T).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 MR | Active-low manual reset input | CMOS-compatible input with 50kΩ internal pullup to VCC; forces reset when pulled low; also clears watchdog timer |
| 2 VCC | Main power supply input | Primary voltage monitored for reset generation; powers internal comparators and push-pull outputs |
| 3 GND | Ground reference | Common return path for all internal circuits and output sinks/sources |
| 4 PFI | Power-fail input | High-impedance node connected to 0.62V internal reference; used with external resistor divider to set custom power-fail trip point |
| 5 PFO | Power-fail output | Active-low open-drain output asserted when PFI < 0.62V; requires external pullup for interrupt signaling |
| 6 WDI | Watchdog input | Edge-sensitive input; rising or falling edge resets 1.6s watchdog timer; 50ns minimum pulse width detectable |
| 7 RESET | Active-high reset output | Push-pull output driven high during normal operation; goes low only during reset assertion (inverse of MAX6705/6/7 standard versions) |
| 8 WDO | Watchdog output | Active-low open-drain output asserted on watchdog timeout or VCC/RST_IN undervoltage; cleared by WDI edge or MR low |
Key Features
| Feature | Design Value |
|---|---|
| Single-supply supervision with active-high RESET | Eliminates level-shifting for µP reset inputs expecting high-active assertion, reducing BOM count |
| Independent 0.62V power-fail comparator | Enables early warning of supply collapse via PFI/PFO pair - critical for orderly shutdown in telecom and storage systems |
| Guaranteed reset validity to VCC = 1V | Ensures deterministic reset behavior during deep brownout or battery depletion down to 1V supply |
| Immunity to short VCC transients | Rejects <100ns supply glitches without false reset assertion, improving reliability in noisy industrial environments |
| Manual reset with integrated 50kΩ pullup | Reduces external component count; allows direct connection to pushbutton without pullup resistor |
Applications
| Industrial PLC Controller | Automotive Body Control Module |
|---|---|
Use Scenario: Monitors main 5V rail and auxiliary 3.3V I/O supply in programmable logic controller with CAN interface. IC Role / Device Role / Timing Role: Provides synchronized active-high reset to ARM Cortex-M7 MCU and asserts PFO interrupt prior to brownout to trigger EEPROM save. Use Value: 140ms reset timeout ensures full FPGA configuration before software boot; 0.62V PFI reference enables precise trip point at 4.7V using 10:1 divider. |
Use Scenario: Supervises 12V-to-5V DC-DC output powering microcontroller and sensor interface in door module. IC Role / Device Role / Timing Role: Generates active-high reset for Infineon AURIX TC3xx; uses WDO to feed NMI input for watchdog-triggered safe state entry. Use Value: 1.6s watchdog period aligns with ASIL-B diagnostic interval requirements; VCC = 1V reset guarantee covers cold-cranking conditions. |
| Network Router Power Management | Medical Infusion Pump Controller |
Use Scenario: Monitors PoE-derived 3.3V rail in edge router with multiple Ethernet PHYs and flash memory. IC Role / Device Role / Timing Role: Asserts RESET high during stable operation; triggers PFO interrupt on AC dropout to initiate graceful TCP session teardown. Use Value: 9µA supply current minimizes standby loss; open-drain PFO allows wired-OR with other fault signals to single MCU interrupt line. |
Use Scenario: Supervises isolated 3.3V supply feeding safety-critical ARM-based pump controller with motor driver and pressure sensors. IC Role / Device Role / Timing Role: Delivers fail-safe reset assertion during battery switchover; uses MR input for hardware-initiated emergency stop. Use Value: Immunity to 100ns VCC transients prevents spurious resets during relay switching; guaranteed operation to 1V supports backup supercap discharge profile. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6706AKA-T | A-version: WDO deasserts immediately on VCC recovery (no timeout delay); non-A version holds WDO low until WDI edge or MR pulse | Preferred where fast watchdog recovery is required after transient undervoltage, e.g., in burst-mode power supplies | Select MAX6706AKA-T if system requires automatic WDO release on VCC restoration without firmware intervention |
| TPS3808G33DBVR | TI part: 3.3V fixed threshold, 200ms reset timeout, no PFI/PFO, no watchdog output - only reset + MR | Suitable for basic reset-only applications lacking power-fail warning or watchdog monitoring capability | Choose TPS3808G33DBVR only when PFI/PFO and WDO functions are unnecessary and longer reset timeout is acceptable |
Compared with MAX6706SKA, MAX6706AKA-T offers faster watchdog recovery but removes latched WDO behavior needed for NMI-driven fault handling; TPS3808G33DBVR reduces cost and complexity but sacrifices both power-fail warning and independent watchdog signaling - limiting use to simple reset-only designs.
Availability
MAX6706SKA is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, network router power management, and medical infusion pump controllers requiring stable component supply across extended temperature ranges (-40°C to +125°C).
Supply support for MAX6706SKA 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, communications, and computing markets, emphasizing high reliability and low-power operation.
The MAX6701–MAX6708 family targets microprocessor supervision in space-constrained, multivoltage systems - delivering integrated reset, watchdog, power-fail warning, and manual reset in a single 8-pin SOT23 package.
FAQ
What is the reset threshold voltage for MAX6706SKA?
The 'K' suffix in MAX6706SKA specifies a factory-trimmed reset threshold of 3.08V (±3% over -40°C to +125°C), optimized for reliable supervision of +3.3V supply rails. This value is measured at VCC falling and is guaranteed across temperature and voltage range per the Electrical Characteristics table.
Does MAX6706SKA provide active-high or active-low reset output?
MAX6706SKA provides an active-high push-pull reset output (pin 7). Unlike MAX6705SKA (active-low), this version asserts RESET high during normal operation and drives it low only during reset conditions - simplifying interface with MCUs requiring high-active reset inputs.
How does the watchdog timer function in MAX6706SKA?
In MAX6706SKA, the watchdog timer times out after 1.6s (typ) if no edge is detected on WDI (pin 6). Upon timeout, WDO (pin 8) asserts low and remains latched until cleared by a WDI edge or MR (pin 1) low pulse - enabling NMI-based fault response without µP intervention.
Can MAX6706SKA monitor voltages other than VCC?
Yes - MAX6706SKA supports external voltage monitoring via the PFI (pin 4) input. By connecting a resistor divider to PFI, users can configure early power-fail detection at any voltage >0.62V; the internal 0.62V reference compares against the divided voltage to assert PFO (pin 5).
What package type and dimensions does MAX6706SKA use?
MAX6706SKA uses an 8-pin SOT23-8 package (JEDEC MO-178 BA) measuring 3.0mm × 1.75mm × 1.3mm with gull-wing leads. Pin pitch is 0.65mm, and the package supports both leaded (-T) and lead-free (+T) variants per Maxim's ordering guide.
MAX6706SKA 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:
- 2.93V, 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
MAX6706SKA FAQ
1.How can I place an order for MAX6706SKA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6706SKA 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 MAX6706SKA reliable?
The price and inventory of MAX6706SKA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6706SKA is usually 5 days.
3.What payment methods are accepted for MAX6706SKA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6706SKA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6706SKA?
MAX6706SKA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6706SKA 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 MAX6706SKA?
For technical support, including MAX6706SKA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6706SKA requirements.
6.How does Aetrix verify that MAX6706SKA is sourced from the original manufacturer or authorized distributors?
All MAX6706SKA 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 MAX6706SKA meets industry standards.
7.What is the process for return or replacement of MAX6706SKA?
All MAX6706SKA units undergo pre-shipment inspection (PSI). If there is an issue with MAX6706SKA, 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 MAX6706SKA part is unused and in its original packaging.
Return procedure for MAX6706SKA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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