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Analog Devices Inc./Maxim Integrated MAX6701ALKA+T
- Part No.:
- MAX6701ALKA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6701ALKA+T.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:549
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Product details
Overview
MAX6701ALKA+T from Maxim Integrated is a precision microprocessor supervisory IC in an 8-pin SOT23 package, providing active-low push-pull reset output, 1.6s watchdog timeout, 0.62V power-fail comparator input, and manual reset input. It monitors +5.0V/+3.3V/+3.0V/+2.5V supplies with 140ms reset timeout and guarantees valid reset down to VCC = 1V. Used in critical µP power monitoring for white goods and telecom systems.
For engineers reviewing the MAX6701ALKA+T datasheet, MAX6701ALKA+T pinout, MAX6701ALKA+T application, or MAX6701ALKA+T equivalent, this page delivers verified specifications, exact pin functions, real-world use cases in intelligent instruments and networking equipment, and validated alternative parts with documented functional differences.
Technical Context
The MAX6701ALKA+T implements a dual-threshold supervision architecture: primary VCC reset detection at 4.63V (L-suffix), plus independent 0.62V PFI comparator for early power-fail warning. Its watchdog timer clears on any WDI edge or MR assertion and asserts WDO independently of RESET.
It features guaranteed reset validity down to VCC = 1V, immunity to short falling-VCC transients, and internal 50kΩ MR pullup. The A-version ensures WDO deasserts immediately upon recovery from undervoltage - unlike standard versions where WDO remains latched until WDI toggles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V (typ) at VCC falling - sets precise power-up reset point for +5V systems |
| Reset Timeout Period | 140ms (min) - ensures µP initialization completes before release |
| Watchdog Timeout | 1.6s (typ) - provides sufficient margin for firmware watchdog servicing |
| Power-Fail Input Threshold | 0.62V (typ) - enables accurate external voltage-divider-based brownout detection |
| Supply Voltage Range | 1.0V to 5.5V - supports operation during deep brownout and full rail conditions |
| Operating Temperature | -40°C to +125°C - qualified for automotive-grade and industrial embedded environments |
| Package | 8-pin SOT23 - surface-mount footprint compatible with high-density PCB layouts |
Pinout & Package
MAX6701ALKA+T uses an 8-pin SOT23 package with 1.9mm × 2.8mm footprint and 0.95mm height. Pin 1 is MR (manual reset input), Pin 2 is VCC, Pin 3 is GND, Pin 4 is PFI (power-fail input), Pin 5 is PFO (power-fail output), Pin 6 is WDI (watchdog input), Pin 7 is RESET (active-low push-pull reset output), and Pin 8 is WDO (active-low watchdog output).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 MR | Active-low manual reset input | CMOS-compatible input with internal 50kΩ pullup; forces reset when pulled low |
| 2 VCC | Supply voltage and primary reset monitor input | Powers internal circuitry and triggers reset when falling below 4.63V threshold |
| 3 GND | Ground reference | Common return path for all analog and digital functions |
| 4 PFI | Power-fail voltage monitor input | High-impedance node for external resistor divider; trips at 0.62V for early warning |
| 5 PFO | Power-fail comparator output | Open-drain active-low output signaling impending supply collapse |
| 6 WDI | Watchdog timer input | Edge-sensitive input; must toggle within 1.6s to prevent WDO assertion |
| 7 RESET | Active-low reset output | Push-pull driver capable of sinking 3.2mA at 4.25V; holds µP in reset for 140ms |
| 8 WDO | Active-low watchdog output | Independent open-drain output asserted on watchdog timeout or VCC/RST_IN undervoltage |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed reset validity to VCC = 1V | Ensures deterministic µP reset state even during severe brownout conditions |
| 140ms reset timeout delay | Meets JEDEC JESD78 reliability requirements for reset pulse width |
| Independent watchdog output (WDO) | Allows NMI-triggered fault logging without interfering with main reset sequence |
| 0.62V precision PFI threshold | Enables accurate power-fail warning using standard resistor values (e.g., 1MΩ/100kΩ divider for 5V rail) |
| Immunity to short falling-VCC transients | Rejects <100ns supply glitches that could falsely trigger reset |
Applications
| Intelligent Instruments | White Goods |
|---|---|
Use Scenario: Digital multimeters and portable analyzers requiring reliable boot sequencing under battery-voltage sag. IC Role / Device Role / Timing Role: Supervises main +3.3V logic rail and auxiliary +5V display supply; asserts RESET until both stabilize. Use Value: Prevents corrupted ADC calibration routines during cold-start or low-battery operation. |
Use Scenario: Refrigerator control boards exposed to line sags during compressor startup. IC Role / Device Role / Timing Role: Monitors +5V MCU supply and +12V motor driver rail via RST_IN1; triggers hard reset on brownout. Use Value: Eliminates firmware lockup caused by marginal VCC during high-current load switching. |
| Networking Equipment | Telecommunications |
Use Scenario: Ethernet switch management controllers operating in unregulated DC environments. IC Role / Device Role / Timing Role: Provides 140ms reset hold-off while PoE negotiation completes; WDO feeds NMI for watchdog event logging. Use Value: Enables graceful link re-establishment after transient power interruptions without full reboot. |
Use Scenario: Base station remote radio units powered by long cable runs with significant IR drop. IC Role / Device Role / Timing Role: Uses PFI/PFO to detect pre-failure voltage droop on +2.5V RF synthesizer supply and initiate controlled shutdown. Use Value: Avoids RF interference bursts during uncontrolled power collapse, meeting ETSI emission limits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6701MLKA+T | 4.38V reset threshold (M-suffix) vs. 4.63V (L-suffix); otherwise identical pinout, timing, and features | Suitable for +5V systems with tighter tolerance rails or higher temperature drift margins | Select when system VCC nominal is 4.75V–4.95V and requires lower trip point for safety margin |
| MAX6705ALKA+T | Includes adjustable PFI/PFO comparator (shared with MAX6701A) but adds dual-supply monitoring capability via RST_IN1 | Supports triple-voltage supervision (VCC + two external rails) vs. single-rail focus of MAX6701ALKA+T | Choose when monitoring secondary supplies (e.g., +1.8V core, +3.3V I/O) is required alongside main VCC |
Compared with MAX6701MLKA+T, the MAX6701ALKA+T offers higher reset threshold for stricter +5V systems; compared with MAX6705ALKA+T, it omits RST_IN1 support to reduce cost and complexity in single-rail applications.
Availability
MAX6701ALKA+T is available at Aetrix Electronics and suitable for critical µP power monitoring, intelligent instruments, and white goods requiring stable component supply across extended temperature ranges (-40°C to +125°C).
Supply support for MAX6701ALKA+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, automotive, and communications markets, with expertise in power management and sensor interfaces.
The MAX6701–MAX6708 family targets space-constrained embedded systems needing reliable, low-power µP supervision with integrated watchdog, power-fail warning, and manual reset - optimized for SOT23 footprint and wide-temperature operation.
FAQ
What is the reset threshold voltage of the MAX6701ALKA+T?
The MAX6701ALKA+T has a nominal reset threshold of 4.63V (L-suffix) at VCC falling, with guaranteed range of 4.47V to 4.78V over -40°C to +125°C. This value is factory-trimmed and specified in the Electrical Characteristics table under VTH parameter for MAX670_L/MAX670_AL variants. The threshold applies directly to the VCC pin and determines when the RESET output asserts during power-down or brownout.
Does the MAX6701ALKA+T support watchdog functionality?
Yes, the MAX6701ALKA+T includes a 1.6s watchdog timer with independent WDO output. It asserts WDO low if the WDI input remains static beyond the timeout period. Unlike non-A versions, the A-version deasserts WDO immediately upon recovery from undervoltage without requiring a WDI edge - a key distinction confirmed in the Standard- vs. A-Version Comparison section of the datasheet.
What is the function of the PFI and PFO pins on the MAX6701ALKA+T?
The PFI (Pin 4) is a high-impedance input referenced to an internal 0.62V comparator; connecting it to a resistor divider enables early power-fail detection on any system rail. The PFO (Pin 5) is its open-drain output, going low when PFI falls below 0.62V. This pair allows the MAX6701ALKA+T to generate preemptive warnings - for example, triggering µP interrupt before main VCC collapse - as detailed in the Power-Fail Comparator section.
Can the MAX6701ALKA+T monitor multiple supply voltages?
No - the MAX6701ALKA+T monitors only the VCC supply for reset generation. It lacks RST_IN1 and RST_IN2 inputs found in MAX6701(A)/MAX6702(A)/MAX6703(A) variants. Its supervision scope is limited to single-rail +5V systems (4.63V threshold), though PFI can be used externally to monitor secondary rails via voltage dividers, as described in the Applications Information section.
What package type and RoHS status does the MAX6701ALKA+T use?
The MAX6701ALKA+T uses an 8-pin SOT23 package (package code K8+2) with lead(Pb)-free construction. The "+T" suffix explicitly denotes RoHS-compliant, lead-free tape-and-reel packaging per Maxim's ordering conventions. Its dimensions are 1.9mm × 2.8mm × 0.95mm, and land pattern number 90-0176 applies for PCB layout.
MAX6701ALKA+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:
- 3
- Voltage - Threshold:
- 4.63V, Adj, Adj
- Output:
- Push-Pull, Totem Pole
- 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
MAX6701ALKA+T FAQ
1.How can I place an order for MAX6701ALKA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6701ALKA+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 MAX6701ALKA+T reliable?
The price and inventory of MAX6701ALKA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6701ALKA+T is usually 5 days.
3.What payment methods are accepted for MAX6701ALKA+T?
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Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6701ALKA+T?
MAX6701ALKA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6701ALKA+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 MAX6701ALKA+T?
For technical support, including MAX6701ALKA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6701ALKA+T requirements.
6.How does Aetrix verify that MAX6701ALKA+T is sourced from the original manufacturer or authorized distributors?
All MAX6701ALKA+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 MAX6701ALKA+T meets industry standards.
7.What is the process for return or replacement of MAX6701ALKA+T?
All MAX6701ALKA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6701ALKA+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 MAX6701ALKA+T part is unused and in its original packaging.
Return procedure for MAX6701ALKA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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