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Analog Devices Inc./Maxim Integrated MAX6707ARKA+T
- Part No.:
- MAX6707ARKA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6707ARKA+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:1,147
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Product details
Overview
MAX6707ARKA+T from Maxim Integrated is a single-supply microprocessor supervisory IC in an 8-pin SOT23 package, providing active-low open-drain reset output, independent watchdog timer with 1.6s timeout, adjustable power-fail comparator (0.62V threshold), and manual reset input - designed for reliable power-up/down/brownout monitoring in +3.3V systems.
For engineers reviewing the MAX6707ARKA+T datasheet, MAX6707ARKA+T pinout, MAX6707ARKA+T application, or MAX6707ARKA+T equivalent, this device supports critical µP power monitoring in white goods, networking equipment, telecommunications infrastructure, and intelligent instruments where guaranteed reset validity down to VCC = 1V and immunity to short VCC transients are required.
Technical Context
The MAX6707ARKA+T implements a dedicated reset generator with 140ms timeout delay and a separate watchdog circuit that asserts WDO low upon 1.6s WDI inactivity or undervoltage on VCC/PFI/RST_IN inputs. Its A-version architecture ensures WDO deasserts immediately when undervoltage conditions clear - unlike standard versions requiring WDI toggling.
It features an externally adjustable 0.62V reference-based power-fail comparator (PFI→PFO), CMOS-compatible MR input with internal 50kΩ pullup, and operates across -40°C to +125°C with supply current as low as 9µA at VCC < 3.6V. Reset threshold is factory-set to 3.08V (suffix 'R'), validated over full temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V (±30mV) - precisely monitors +3.3V supply rails during brownout |
| Reset Timeout Delay | 140ms - ensures µP remains held in reset long enough for stable clock and supply settling |
| Watchdog Timeout | 1.6s (typ) - provides robust software activity supervision without false triggers |
| Power-Fail Threshold | 0.62V (typ), 6mV hysteresis - enables accurate early-warning detection of secondary supply collapse |
| Supply Voltage Range | 1.2V to 5.5V - guarantees functional reset assertion even during deep brownout down to 1.2V |
| Operating Temperature | -40°C to +125°C - qualified for industrial and automotive under-hood environments |
| Reset Output Type | Active-low open-drain - allows wired-OR configuration and flexible voltage-level translation |
Pinout & Package
MAX6707ARKA+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 (indicated by '+T' suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - MR | Manual Reset Input | CMOS-compatible active-low input with internal 50kΩ pullup; forces reset when pulled low, also clears watchdog |
| 2 - VCC | Supply Voltage Input | Primary power rail input (1.2–5.5V); powers internal circuitry and defines reset threshold reference |
| 3 - GND | Ground Reference | System ground connection; serves as return path for all internal comparators and outputs |
| 4 - PFI | Power-Fail Input | High-impedance comparator input referenced to 0.62V; accepts external resistor divider for custom trip point |
| 5 - PFO | Power-Fail Output | Active-low open-drain output asserted when PFI < 0.62V; used for early warning interrupt or system shutdown sequencing |
| 6 - WDI | Watchdog Input | Edge-sensitive input; requires rising/falling transition every ≤1.6s to prevent WDO assertion |
| 7 - RESET | Reset Output | Active-low open-drain output; asserted during power-up, brownout, MR activation, or watchdog timeout |
| 8 - WDO | Watchdog Output | Independent active-low open-drain output; latched low on watchdog timeout, cleared by WDI edge or MR low |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed reset validity to VCC = 1V | Ensures deterministic reset behavior even during severe brownout, preventing µP runaway |
| Immunity to short falling VCC transients | Rejects sub-100ns supply glitches, eliminating spurious resets in noisy power environments |
| Independent watchdog output (WDO) | Enables NMI-triggered fault logging without interfering with primary reset timing or state |
| Adjustable power-fail comparator | Supports monitoring of auxiliary supplies (e.g., 1.8V, 2.5V) via external resistor divider on PFI |
| 140ms reset timeout with temperature stability | Provides consistent reset hold time across -40°C to +125°C, critical for industrial thermal cycling |
Applications
| White Goods Control | Networking Equipment |
|---|---|
Use Scenario: Washing machine main control board with dual-voltage regulation (3.3V MCU core, 5V I/O). IC Role / Device Role / Timing Role: Monitors 3.3V rail and generates reset pulse; uses PFI/PFO to detect 5V supply sag before compressor restart. Use Value: Prevents firmware corruption during motor-induced line sags and enables graceful shutdown before AC loss. |
Use Scenario: Enterprise switch management controller operating in thermally stressed rack environments. IC Role / Device Role / Timing Role: Provides brownout reset and watchdog supervision for ARM-based management SoC; WDO feeds NMI for crash dump capture. Use Value: Maintains system integrity during transient AC dips and detects firmware hangs without affecting data-plane operation. |
| Telecom Power Shelf | Intelligent Instrumentation |
Use Scenario: 48V-to-3.3V DC-DC module in telecom base station power shelf with remote monitoring. IC Role / Device Role / Timing Role: Supervises 3.3V logic supply and uses PFO to signal upstream BMS when backup battery voltage drops below safe threshold. Use Value: Enables predictive maintenance alerts and prevents uncontrolled reboot during battery switchover. |
Use Scenario: Portable gas analyzer with low-power MCU and analog front-end requiring precise startup sequencing. IC Role / Device Role / Timing Role: Generates clean reset after LDO stabilization; MR tied to calibration button for field recalibration-initiated reset. Use Value: Eliminates need for external RC reset networks, reducing BOM count and improving cold-start reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6707AKA+T | Non-A version: WDO remains latched until WDI toggle; no automatic deassertion on VCC recovery | Suitable only where watchdog event must persist until software intervention | Select MAX6707ARKA+T when immediate WDO clearance on supply recovery is required |
| TPS3808G33DBVR | TI part: 3.3V fixed threshold, 200ms reset timeout, no PFI/PFO comparator, push-pull reset only | Lacks power-fail warning capability and open-drain flexibility; limited to single-rail monitoring | Choose MAX6707ARKA+T when early power-fail signaling and multi-rail adaptability are essential |
Compared with MAX6707AKA+T and TPS3808G33DBVR, MAX6707ARKA+T uniquely combines A-version watchdog behavior (instant WDO release on VCC recovery), integrated 0.62V power-fail comparator with open-drain PFO, and 3.08V precision reset threshold - enabling both robust supervision and proactive power failure response in compact SOT23 footprint.
Availability
MAX6707ARKA+T is available at Aetrix Electronics and suitable for white goods control, networking equipment, and telecommunications infrastructure requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6707ARKA+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 industrial, communications, computing, and consumer applications.
The MAX6701–MAX6708 family delivers highly integrated µP supervision with reset, watchdog, and power-fail functions in ultra-small packages - targeting space-constrained, high-reliability embedded systems demanding guaranteed operation from -40°C to +125°C.
FAQ
What is the reset threshold voltage for MAX6707ARKA+T?
The MAX6707ARKA+T has a factory-trimmed reset threshold of 3.08V (±30mV) at -40°C to +125°C, optimized for reliable supervision of +3.3V supply rails. This value is specified in the Electrical Characteristics table under "VTH" for suffix 'R', and remains stable with 60ppm/°C temperature coefficient.
How does the A-version watchdog behavior differ in MAX6707ARKA+T?
In MAX6707ARKA+T, the watchdog output (WDO) deasserts automatically when VCC recovers above threshold - no WDI toggle required. In contrast, non-A versions latch WDO low until a WDI edge occurs. This A-version behavior simplifies fault recovery and avoids unnecessary NMI interrupts during transient brownouts.
Can MAX6707ARKA+T monitor voltages other than VCC?
Yes. The PFI pin accepts an external resistor divider to set custom trip points for secondary supplies (e.g., 1.8V, 2.5V). With its 0.62V internal reference and 6mV hysteresis, MAX6707ARKA+T accurately detects voltage sags on any rail - and asserts PFO to trigger orderly shutdown or alert generation.
What is the function of the MR pin in MAX6707ARKA+T?
The MR pin is an active-low manual reset input with internal 50kΩ pullup to VCC. Pulling MR low forces RESET assertion for the full 140ms timeout period and also clears the watchdog timer. It supports pushbutton reset initiation and can be driven by external logic, enabling system-level reset coordination.
Is MAX6707ARKA+T compatible with open-drain bus configurations?
Yes. Both RESET and WDO outputs are open-drain, allowing wired-OR connection with other supervisors or logic signals. PFO is also open-drain. This enables level-shifting, shared interrupt lines, and fault-tolerant reset architectures - critical in multi-supervisor or hot-swap systems.
MAX6707ARKA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-8
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 2.63V, Adj
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-8
MAX6707ARKA+T FAQ
1.How can I place an order for MAX6707ARKA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6707ARKA+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 MAX6707ARKA+T reliable?
The price and inventory of MAX6707ARKA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6707ARKA+T is usually 5 days.
3.What payment methods are accepted for MAX6707ARKA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6707ARKA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6707ARKA+T?
MAX6707ARKA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6707ARKA+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 MAX6707ARKA+T?
For technical support, including MAX6707ARKA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6707ARKA+T requirements.
6.How does Aetrix verify that MAX6707ARKA+T is sourced from the original manufacturer or authorized distributors?
All MAX6707ARKA+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 MAX6707ARKA+T meets industry standards.
7.What is the process for return or replacement of MAX6707ARKA+T?
All MAX6707ARKA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6707ARKA+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 MAX6707ARKA+T part is unused and in its original packaging.
Return procedure for MAX6707ARKA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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