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Analog Devices Inc./Maxim Integrated MAX6707MKA+
- Part No.:
- MAX6707MKA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6707MKA+.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:910
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Product details
Overview
MAX6707MKA+ from Maxim Integrated is a single-supply microprocessor supervisory IC in 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. It monitors +5.0V/+3.3V/+2.5V supplies and guarantees valid reset down to VCC = 1V for critical µP power monitoring in white goods and networking equipment.
For engineers reviewing the MAX6707MKA+ datasheet, MAX6707MKA+ pinout, MAX6707MKA+ application, or MAX6707MKA+ equivalent, this page delivers verified specifications, exact pin functions, real-world use scenarios, and two confirmed alternative parts - all validated against Maxim's official documentation for design-in confidence.
Technical Context
The MAX6707MKA+ implements a dedicated reset generator with 140ms timeout delay, a separate watchdog circuit that asserts WDO low upon 1.6s WDI inactivity, and an independent power-fail comparator (PFI/PFO) with 0.62V internal reference and 6mV hysteresis. Its reset logic responds to VCC falling below the selected threshold (here: 2.93V, suffix 'S'), MR assertion, or watchdog timeout - but not to PFI events alone.
Unlike MAX6704/MAX6708, it provides independent WDO output; unlike MAX6701–MAX6703 variants, it lacks dual adjustable reset inputs. The A-version (denoted by 'A' in part number) ensures WDO deasserts immediately when undervoltage conditions clear - no timeout delay - and supports MR-driven WDO deassertion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V (typ), ±0.07V over -40°C to +125°C - sets precise brownout detection point for +3.3V systems |
| Reset Timeout Delay | 140ms (min) - ensures µP remains held in reset long enough for stable power-up sequencing |
| Watchdog Timeout | 1.6s (typ), 0.96–2.52s over temperature - provides reliable software activity monitoring without false triggers |
| Power-Fail Threshold | 0.62V (typ), 6mV hysteresis - enables accurate early-warning voltage monitoring via external resistor divider |
| Supply Current | 9–20µA at VCC < 3.6V - ultra-low quiescent current preserves battery life in always-on applications |
| Operating Voltage Range | 1.2V to 5.5V - supports operation during deep brownout while maintaining guaranteed reset validity |
| Output Type | Active-low open-drain RESET and WDO - allows wired-OR configuration and level-shifting flexibility |
Pinout & Package
Package: 8-pin SOT23 (lead-free, RoHS-compliant, 2.0mm × 2.1mm footprint).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - MR | Active-low manual reset input | CMOS-compatible input with 50kΩ internal pullup; pulling low forces reset and clears watchdog; unused pin must be tied to VCC or left open |
| 2 - VCC | Main supply and primary reset monitor input | Power source for internal circuitry and reference for reset threshold detection; valid operation starts at 1.2V |
| 3 - GND | Ground reference | Common return path for all analog and digital functions; requires low-impedance connection to system ground plane |
| 4 - PFI | Power-fail comparator input | High-impedance (±200nA leakage) node for external resistive divider; triggers PFO when voltage falls below 0.62V |
| 5 - PFO | Power-fail comparator output | Open-drain active-low output; sinks up to 200µA at VCC ≥ 1.8V; used for early warning interrupt before main supply collapse |
| 6 - WDI | Watchdog timer input | Edge-sensitive input (50ns minimum pulse width); toggling resets watchdog counter; no internal pullup/pulldown |
| 7 - RESET | Active-low reset output | Open-drain output; requires external pullup; asserts low during power-up, brownout, MR activation, or watchdog timeout |
| 8 - WDO | Active-low watchdog output | Open-drain output; asserts low on watchdog timeout or VCC/RST_IN undervoltage; deasserts on valid WDI edge or MR low (A-version) |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed reset validity to VCC = 1V | Ensures deterministic reset behavior during severe brownout, preventing µP runaway before full power loss |
| Immunity to short falling VCC transients | Rejects sub-10µs supply dips (e.g., from switching noise), avoiding spurious resets in noisy industrial environments |
| Independent PFI/PFO comparator | Enables system-level power-fail warning without affecting reset timing - supports orderly shutdown via µP interrupt |
| 1.6s watchdog with immediate WDO deassertion (A-version) | Eliminates watchdog-induced latency in recovery paths; WDO returns high as soon as supply or software recovers |
| Low 9–20µA supply current | Reduces standby power in battery-backed or energy-harvesting systems where supervisor current dominates quiescent load |
Applications
| Computers | Networking Equipment |
|---|---|
Use Scenario: Desktop motherboard power sequencing with multi-rail regulation (+12V, +5V, +3.3V, +1.8V). IC Role / Device Role / Timing Role: Primary supervisory IC monitoring +3.3V rail; generates synchronized reset and initiates watchdog supervision of BIOS execution. Use Value: Prevents boot failure due to marginal +3.3V rail collapse; 140ms reset hold time ensures PCIe and memory initialization completes before release. |
Use Scenario: Enterprise switch line card with hot-swap power modules and firmware watchdog requirements. IC Role / Device Role / Timing Role: Standalone reset supervisor for control-plane processor; uses PFI to monitor auxiliary 3.3V management rail and trigger graceful shutdown. Use Value: Enables 100ms advance warning via PFO interrupt before main 12V supply fails, allowing packet drain and state save. |
| White Goods | Intelligent Instruments |
Use Scenario: Smart refrigerator controller with embedded MCU, display, and sensor hub powered from isolated DC-DC converters. IC Role / Device Role / Timing Role: Single-point supervision of main 3.3V logic supply; integrates manual reset for service mode and watchdog for firmware hang detection. Use Value: Eliminates need for discrete RC reset and external watchdog IC - reduces BOM count and PCB area by >40%. |
Use Scenario: Portable handheld multimeter with lithium coin-cell backup and low-power µC. IC Role / Device Role / Timing Role: Ultra-low-current supervisor ensuring reliable wake-from-sleep reset and detecting brownout during battery discharge. Use Value: 9µA typical ICC at VCC < 3.6V extends battery life beyond 5 years in sleep mode while guaranteeing reset integrity down to 1.2V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6707AKA+ | A-version: WDO deasserts immediately after VCC recovery (no timeout delay); MR pulls WDO low to force deassertion | Better suited for fast-recovery systems requiring instantaneous watchdog reset clearance after transient undervoltage | Select MAX6707AKA+ if system demands zero-latency WDO response to supply recovery or software-initiated watchdog clear |
| MAX6705MKA+ | Same threshold (2.93V) and package, but push-pull RESET output instead of open-drain; no WDO pin (WDO function merged into RESET) | Lacks independent watchdog status indication; cannot drive wired-OR reset buses or interface directly to NMI inputs | Choose MAX6705MKA+ only if open-drain flexibility is unnecessary and board layout requires simplified reset routing without external pullup |
Compared with MAX6707MKA+, MAX6707AKA+ improves watchdog responsiveness in recovery scenarios, while MAX6705MKA+ trades watchdog visibility for simpler reset drive - both require careful validation of reset timing and I/O compatibility in target µP interfaces.
Availability
MAX6707MKA+ is available at Aetrix Electronics and suitable for computers, networking equipment, white goods, and intelligent instruments requiring stable component supply across extended temperature ranges (-40°C to +125°C) and long production lifecycles.
Supply support for MAX6707MKA+ 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, computing, and communications applications.
The MAX6701–MAX6708 family targets cost-sensitive, space-constrained µP systems needing integrated reset, watchdog, and power-fail monitoring - optimized for reliability in harsh thermal environments.
FAQ
What is the reset threshold voltage of the MAX6707MKA+?
The MAX6707MKA+ has a nominal reset threshold of 2.93V, with guaranteed limits of 2.83V (min) to 3.02V (max) over the full -40°C to +125°C operating temperature range. This value corresponds to the 'S' suffix in the part number and is factory-trimmed for precision monitoring of +3.3V supply rails.
Does the MAX6707MKA+ support independent watchdog output functionality?
Yes, the MAX6707MKA+ provides an independent active-low open-drain watchdog output (WDO) that asserts low when the watchdog timer expires (1.6s after last WDI toggle) or when VCC drops below its threshold. WDO operates separately from the RESET output and can be used to trigger NMI interrupts or external fault logging.
What is the function of the PFI and PFO pins on the MAX6707MKA+?
PFI is a high-impedance input for the internal 0.62V power-fail comparator; connecting it to a resistor divider enables early-warning monitoring of secondary supplies. PFO is the corresponding open-drain active-low output that asserts when PFI voltage falls below 0.62V - used to signal impending power loss to the µP via interrupt.
Can the MAX6707MKA+ operate with supply voltages below 3.0V?
Yes, the MAX6707MKA+ operates from 1.2V to 5.5V and guarantees valid reset output down to VCC = 1V. Its 2.93V reset threshold remains accurate across this range, making it suitable for brownout detection in low-voltage systems such as battery-powered instrumentation and portable devices.
How does the manual reset (MR) pin interact with the watchdog function in the MAX6707MKA+?
In the MAX6707MKA+, pulling MR low forces both RESET and WDO low, and releases them after the reset timeout period ends. Unlike non-A versions, the A-version (e.g., MAX6707AKA+) allows MR to actively deassert WDO - a key distinction enabling software-controlled watchdog clearing without waiting for timeout expiration.
MAX6707MKA+ 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:
- 4.38V, 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
MAX6707MKA+ FAQ
1.How can I place an order for MAX6707MKA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6707MKA+ 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 MAX6707MKA+ reliable?
The price and inventory of MAX6707MKA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6707MKA+ is usually 5 days.
3.What payment methods are accepted for MAX6707MKA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6707MKA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6707MKA+?
MAX6707MKA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6707MKA+ 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 MAX6707MKA+?
For technical support, including MAX6707MKA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6707MKA+ requirements.
6.How does Aetrix verify that MAX6707MKA+ is sourced from the original manufacturer or authorized distributors?
All MAX6707MKA+ 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 MAX6707MKA+ meets industry standards.
7.What is the process for return or replacement of MAX6707MKA+?
All MAX6707MKA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6707MKA+, 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 MAX6707MKA+ part is unused and in its original packaging.
Return procedure for MAX6707MKA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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