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Analog Devices Inc./Maxim Integrated MAX6707ALKA+T
- Part No.:
- MAX6707ALKA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- -
- Datasheet:
-
MAX6707ALKA+T.pdf
- Description:
- IC SUPERVISOR MPU LV SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:4,777
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Product details
Overview
MAX6707ALKA+T from Maxim Integrated is an active-low open-drain microprocessor supervisory IC designed for single-supply voltage monitoring in embedded systems. It provides reset generation during power-up, brownout, and power-down; a 1.6s watchdog timer with independent WDO output; a 0.62V precision power-fail comparator (PFI/PFO); and manual reset input (MR). It operates across -40°C to +125°C and supports VCC down to 1.0V, making it suitable for industrial-grade 3.3V/2.5V µP power monitoring.
For engineers reviewing the MAX6707ALKA+T datasheet, MAX6707ALKA+T pinout, MAX6707ALKA+T application, or MAX6707ALKA+T equivalent, this page delivers verified specifications, validated pin functions, real-world use cases in white goods and telecom infrastructure, and two confirmed alternative parts with documented functional and interface differences.
Technical Context
The MAX6707ALKA+T implements a dual-comparator architecture: one internal reference monitors VCC against a factory-trimmed threshold (here: 3.08V nominal, suffix 'T'), while a second 0.62V comparator accepts external resistive dividers on PFI for adjustable power-fail detection. Its watchdog logic clears only upon valid WDI edge transitions or MR assertion - not automatically on reset deassertion - ensuring robust timeout recovery.
Reset timing is governed by a guaranteed 140ms timeout period after VCC rises above threshold, with reset validity maintained down to VCC = 1.0V. The open-drain RESET and WDO outputs support flexible pull-up configurations, and the 50kΩ internal MR pullup eliminates external components for pushbutton reset implementation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 3.08V (nominal, ±3% over -40°C to +125°C) - sets precise brownout detection point for 3.3V systems |
| Reset Timeout Period | 140ms (min) - ensures µP remains held in reset long enough for stable clock and supply settling |
| Watchdog Timeout | 1.6s (typical) - provides sufficient window for firmware watchdog servicing without false triggers |
| PFI Threshold | 0.62V (typical) - enables accurate, temperature-stable power-fail warning via external resistor divider |
| Supply Current | 9µA (typ at VCC < 3.6V) - ultra-low quiescent current extends battery life in always-on monitoring circuits |
| Operating Temp Range | -40°C to +125°C - qualified for under-hood automotive, industrial control, and telecom base station environments |
| Package | 8-pin SOT23 - surface-mount footprint compatible with high-density PCB layouts and automated assembly |
Pinout & Package
MAX6707ALKA+T is housed in an 8-pin SOT23 package (package code K8+2), measuring 2.9mm × 1.6mm × 1.1mm, with gull-wing leads and RoHS-compliant lead-free plating (+T suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 MR | Active-low manual reset input | CMOS-compatible input with 50kΩ internal pullup; pulling low forces RESET assertion and clears watchdog timer |
| 2 VCC | Supply voltage and primary reset monitor input | Power source for internal circuitry; monitored against 3.08V threshold to trigger reset on undervoltage |
| 3 GND | Ground reference | Common return path for all internal comparators, timers, and output drivers |
| 4 PFI | Power-fail voltage monitor input | High-impedance node connected to 0.62V internal reference; used with external divider to set custom power-fail trip point |
| 5 PFO | Power-fail output | Open-drain output asserted low when PFI falls below 0.62V; requires external pullup for interrupt signaling |
| 6 N.C. | No connection | Not internally bonded; must be left floating or tied to GND per layout guidelines |
| 7 RESET | Active-low reset output | Open-drain output; sinks current when asserted (low), enabling wired-OR reset bus configurations |
| 8 WDO | Active-low watchdog output | Independent open-drain output asserted on watchdog timeout or VCC/RST_IN undervoltage; latched until cleared by WDI edge or MR |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed reset validity to VCC = 1.0V | Ensures reliable reset assertion even during deep brownout conditions before system power collapse |
| Immunity to short falling VCC transients | Rejects sub-10µs supply dips, preventing spurious resets in electrically noisy environments |
| Independent watchdog output (WDO) | Enables separate NMI or fault logging without interfering with main reset timing or polarity |
| Adjustable power-fail comparator (PFI/PFO) | Supports early-warning power-fail detection on secondary rails (e.g., 1.8V I/O, 1.2V core) using simple resistor networks |
| 140ms reset timeout with temperature stability | Minimizes risk of premature µP release while maintaining consistent timing across full operating range |
Applications
| Industrial PLC Controllers | Telecom Power Management |
|---|---|
|
Use Scenario: Monitoring 3.3V I/O supply and 2.5V auxiliary rail in modular programmable logic controllers deployed in factory automation cabinets. IC Role / Device Role / Timing Role: Supervisory IC providing synchronized reset assertion, brownout detection, and watchdog supervision for ARM-based controller SoC. Use Value: Prevents corrupted firmware execution during line-voltage sags common in industrial power distribution, with 140ms reset hold guaranteeing clean boot sequence. |
Use Scenario: Power sequencing and failure monitoring in 48V-to-3.3V DC-DC converter modules inside LTE base station remote radio units. IC Role / Device Role / Timing Role: Dual-threshold supervisor detecting both main 3.3V rail collapse and early droop on backup 2.5V management rail via PFI divider. Use Value: Enables graceful shutdown and alarm reporting via PFO interrupt before complete power loss, meeting GR-1089 immunity requirements. |
| Smart Home White Goods | Critical µP Power Monitoring |
|
Use Scenario: Embedded control board in premium refrigerator with IoT connectivity, requiring fail-safe reset during AC mains interruptions and compressor startup surges. IC Role / Device Role / Timing Role: Single-supply supervisor with manual reset button interface (MR) and watchdog timer guarding ESP32 application processor. Use Value: 1.6s watchdog timeout prevents lockup during WiFi reconnection attempts; open-drain RESET allows shared reset bus with display and sensor subsystems. |
Use Scenario: High-reliability medical diagnostic equipment where µP must never execute undefined code due to supply instability. IC Role / Device Role / Timing Role: Primary power integrity guardian asserting reset on VCC drop below 3.08V and generating power-fail warning via PFO to initiate data save routines. Use Value: Guaranteed reset operation down to VCC = 1.0V ensures last-chance reset assertion during catastrophic supply decay, preserving patient data integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6707LKA+T | Higher VCC reset threshold (4.63V vs. 3.08V); otherwise identical pinout, features, and timing | Suitable for +5V legacy µP systems; incompatible with 3.3V-only designs without level-shifting | Select only if target supply is 4.5–5.5V and brownout margin must exceed 4.5V |
| TPS3808G33DBVR | Fixed 3.3V reset threshold, no PFI/PFO comparator, push-pull RESET, 200ms timeout, same SOT23-8 package | Lacks power-fail warning capability and independent watchdog output; simpler integration where only basic reset is needed | Choose when cost sensitivity outweighs need for PFI-based predictive shutdown or dual-output fault signaling |
Compared with MAX6707ALKA+T, MAX6707LKA+T shifts reset activation to higher voltage for 5V systems but retains full feature parity, while TPS3808G33DBVR trades PFI/PFO flexibility and WDO independence for lower BOM count and tighter reset timing tolerance - making it viable only in non-predictive, single-rail applications.
Availability
MAX6707ALKA+T is available at Aetrix Electronics and suitable for industrial PLC controllers, telecom power modules, smart home white goods, and critical µP power monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6707ALKA+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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for demanding industrial, automotive, and communications applications.
The MAX6701–MAX6708 family was engineered specifically for space-constrained, high-reliability microprocessor supervision - integrating reset, watchdog, and power-fail functions into a single 8-pin SOT23 device to replace discrete solutions in mission-critical embedded systems.
FAQ
What is the exact reset threshold voltage for MAX6707ALKA+T?
The MAX6707ALKA+T has a nominal VCC reset threshold of 3.08V, with guaranteed limits of 2.97V (min) to 3.17V (max) over the full -40°C to +125°C operating temperature range. This value is factory-trimmed and corresponds to the 'T' suffix in the part number, optimized for reliable supervision of 3.3V supply rails.
Does MAX6707ALKA+T support power-fail warning on voltages other than VCC?
Yes. The MAX6707ALKA+T includes a dedicated PFI input referenced to an internal 0.62V comparator, allowing external resistor dividers to configure power-fail detection on any system rail - such as 1.8V I/O, 2.5V core, or 1.2V memory supplies - with predictable trip points and hysteresis.
What is the function of the N.C. pin (Pin 6) on MAX6707ALKA+T?
Pin 6 on the MAX6707ALKA+T is a no-connect terminal - it is not internally bonded and serves no electrical function. Per Maxim's layout guidance, it should be left unconnected or tied to ground on the PCB to maintain mechanical stability and avoid floating metal traces.
How does the watchdog behavior differ between standard and 'A' versions of MAX6707?
In the MAX6707ALKA+T ('A' version), WDO deasserts immediately when VCC recovers above threshold, whereas the non-A MAX6707 requires a valid WDI edge to clear WDO after undervoltage. Both assert WDO on watchdog timeout, but only the 'A' version supports automatic WDO recovery without firmware intervention during transient brownouts.
Can MAX6707ALKA+T drive a reset line directly without external pull-up resistors?
No - MAX6707ALKA+T features open-drain RESET and WDO outputs, which require external pull-up resistors to define the high state. The typical value is 10kΩ to VCC, enabling wired-OR configuration with other supervisors or logic devices on shared reset buses.
MAX6707ALKA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- -
- Number of Voltages Monitored:
- -
- Voltage - Threshold:
- -
- Output:
- -
- Reset:
- -
- Reset Timeout:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MAX6707ALKA+T FAQ
1.How can I place an order for MAX6707ALKA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6707ALKA+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 MAX6707ALKA+T reliable?
The price and inventory of MAX6707ALKA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6707ALKA+T is usually 5 days.
3.What payment methods are accepted for MAX6707ALKA+T?
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Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6707ALKA+T?
MAX6707ALKA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6707ALKA+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 MAX6707ALKA+T?
For technical support, including MAX6707ALKA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6707ALKA+T requirements.
6.How does Aetrix verify that MAX6707ALKA+T is sourced from the original manufacturer or authorized distributors?
All MAX6707ALKA+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 MAX6707ALKA+T meets industry standards.
7.What is the process for return or replacement of MAX6707ALKA+T?
All MAX6707ALKA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6707ALKA+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 MAX6707ALKA+T part is unused and in its original packaging.
Return procedure for MAX6707ALKA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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