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Analog Devices Inc./Maxim Integrated MAX6701ATKA+T
- Part No.:
- MAX6701ATKA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6701ATKA+T.pdf
- Description:
- IC SUPERVISOR MPU LV SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:2,000
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Product details
Overview
MAX6701ATKA+T from Maxim Integrated is a precision microprocessor supervisory IC in 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 - designed for reliable power-up/down/brownout monitoring in +3.3V systems. It guarantees valid reset down to VCC = 1V and supports critical µP power monitoring in industrial controllers and telecom infrastructure.
For engineers reviewing the MAX6701ATKA+T datasheet, MAX6701ATKA+T pinout, MAX6701ATKA+T application, or MAX6701ATKA+T equivalent, this page delivers verified electrical specs, exact pin functions, confirmed alternative parts with functional differences, and real-world use cases for embedded power supervision where supply stability, watchdog reliability, and low-voltage operation are essential.
Technical Context
The MAX6701ATKA+T implements a dual-threshold supervision architecture: primary VCC monitoring with factory-trimmed reset threshold (3.08V typ), plus independent 0.62V reference-based PFI input for external power-fail detection. Its watchdog timer asserts WDO low after 1.6s of no WDI edge transition and clears on any rising/falling edge - with latch behavior specific to A-version logic.
Reset generation uses an internal 140ms timeout delay after VCC rises above threshold, with guaranteed RESET assertion at VCC ≥ 1V and immunity to sub-100ns VCC transients. The device integrates internal 50kΩ MR pullup and supports push-pull RESET/WDO outputs powered directly from VCC.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V (typ) at VCC falling - sets precise brownout detection point for +3.3V systems |
| Reset Timeout Delay | 140ms (min) - ensures µP remains held in reset long enough for stable clock and supply settling |
| Watchdog Timeout Period | 1.6s (typ) - provides sufficient window for firmware watchdog servicing without false triggers |
| Power-Fail Input Threshold | 0.62V (typ) - enables accurate early-warning detection of secondary supply collapse via external resistor divider |
| Supply Voltage Range | 1.0V to 5.5V - guarantees functional reset assertion even during deep brownout conditions |
| Operating Temperature | –40°C to +125°C - validated for automotive-grade and industrial control environments |
| Quiescent Current | 9µA (typ) at VCC < 3.6V - minimizes standby power impact in battery-backed or energy-sensitive systems |
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 internal 50kΩ pullup; pulling low forces reset pulse and clears watchdog timer |
| 2 - VCC | Main supply voltage input | Primary power source for internal circuitry and push-pull outputs; also monitored for reset threshold violation |
| 3 - GND | Ground reference | Common return path for all analog and digital functions; must be low-impedance for noise immunity |
| 4 - PFI | Power-fail monitor input | High-impedance comparator input referenced to 0.62V; connects to external resistive divider for secondary supply monitoring |
| 5 - PFO | Power-fail monitor output | Active-low open-drain output asserted when PFI < 0.62V; used to trigger µP interrupt before main supply collapse |
| 6 - WDI | Watchdog input | Edge-sensitive input; rising or falling edge resets 1.6s watchdog timer; no level-hold requirement |
| 7 - RESET | Active-low reset output | Push-pull output asserted low during power-up, brownout, or MR activation; sinks 3.2mA at VCC ≥ 4.25V |
| 8 - WDO | Active-low watchdog output | Push-pull watchdog status output; latched low on timeout and cleared only by WDI edge or MR low (A-version behavior) |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed reset validity to VCC = 1V | Ensures deterministic µP reset state even during severe brownout - no floating or undefined behavior below 1.2V |
| Independent watchdog output (WDO) | Enables separate NMI handling without interfering with main RESET line - critical for fault-isolation architectures |
| 0.62V precision PFI threshold | Allows accurate power-fail warning for any system rail using simple resistor divider - eliminates need for external reference |
| 140ms reset timeout with temperature stability | Provides consistent reset hold time across –40°C to +125°C - avoids timing violations in wide-temp applications |
| Immunity to short VCC transients (<100ns) | Prevents spurious resets caused by PCB noise or switching regulator ripple - improves system robustness |
Applications
| Industrial Controllers | Telecom Power Management |
|---|---|
Use Scenario: Monitoring +3.3V I/O supply and +1.8V core rail in programmable logic controller (PLC) backplane. IC Role / Device Role / Timing Role: Primary supervisor asserting RESET during brownout and generating PFO interrupt for graceful shutdown sequence. Use Value: Prevents corrupted register writes during undervoltage by holding µP in reset until both rails stabilize, while PFO alerts firmware to save volatile data before power loss. |
Use Scenario: Supervising DC-DC converter output feeding baseband processor in 4G/LTE small cell radio unit. IC Role / Device Role / Timing Role: Dual-role supervisor: VCC reset for processor startup and PFI-based early warning for backup battery switchover. Use Value: Enables seamless transition to battery backup within 1µs PFI-to-PFO response, avoiding service interruption during AC failure. |
| White Goods MCU Systems | Critical µP Power Monitoring |
Use Scenario: Power sequencing and fault detection in smart refrigerator main control board with multiple voltage domains. IC Role / Device Role / Timing Role: Centralized reset generator coordinating reset timing across motor driver, sensor interface, and display MCU subsystems. Use Value: Eliminates need for discrete RC reset circuits - reduces BOM count and improves timing accuracy across temperature range. |
Use Scenario: Ensuring deterministic boot state in medical diagnostic equipment requiring FDA-compliant power-on self-test (POST). IC Role / Device Role / Timing Role: Certified supervisory element guaranteeing minimum 140ms reset pulse width and 1.6s watchdog timeout per IEC 62304. Use Value: Meets Class C software safety requirements by preventing execution of corrupted code during unstable supply conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6705ATKA+T | Includes adjustable PFI/PFO comparator and same 3.08V VCC threshold; adds PFO output capability | Required when power-fail interrupt (PFO) must drive µP NMI pin independently of RESET | Select MAX6705ATKA+T if dual-output signaling (RESET + PFO) is needed; otherwise MAX6701ATKA+T offers lower cost and identical core supervision |
| TPS3808G30DBVR | 3.0V fixed reset threshold, 200ms timeout, no integrated watchdog or PFI comparator | Suitable only for basic reset-only applications without watchdog or power-fail warning needs | Choose TPS3808G30DBVR only when watchdog and PFI functions are omitted from system design - not a functional substitute for MAX6701ATKA+T |
Compared with MAX6701ATKA+T, MAX6705ATKA+T adds PFO output functionality for independent power-fail signaling, while TPS3808G30DBVR lacks both watchdog and PFI features - making it suitable only for simplified reset-only use cases without supervision complexity.
Availability
MAX6701ATKA+T is available at Aetrix Electronics and suitable for industrial controllers, telecom infrastructure, and white goods requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6701ATKA+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 high-performance analog and mixed-signal ICs for demanding industrial, automotive, and communications applications.
The MAX6701–MAX6708 family targets compact, low-power microprocessor supervision with integrated watchdog, power-fail warning, and multi-rail monitoring - optimized for space-constrained embedded systems needing guaranteed reset integrity.
FAQ
What is the exact reset threshold voltage for MAX6701ATKA+T?
The MAX6701ATKA+T has a factory-trimmed VCC reset threshold of 3.08V (typical) with ±30mV tolerance over –40°C to +125°C. This value corresponds to the "T" suffix in the Threshold Suffix Guide and is specifically calibrated for reliable supervision of +3.3V supply rails under varying load and temperature conditions. The threshold is guaranteed across full operating range and does not require external calibration.
Does MAX6701ATKA+T include a watchdog timer and independent watchdog output?
Yes, MAX6701ATKA+T includes a 1.6s watchdog timer and an independent active-low watchdog output (WDO). The WDO is push-pull and latched low on timeout, clearing only upon a valid WDI edge transition or MR low assertion - consistent with A-version behavior defined in the Standard- vs. A-Version Comparison section of the datasheet.
Can MAX6701ATKA+T monitor a secondary supply voltage besides VCC?
Yes, MAX6701ATKA+T can monitor a secondary supply via its PFI pin, which features a precision 0.62V internal reference. By connecting PFI to a resistor divider from the secondary rail, users can set custom trip points - for example, detecting collapse of a +5V auxiliary supply at 4.8V using a 77:1 divider ratio. PFO then provides active-low interrupt signaling.
What is the function of the MR pin on MAX6701ATKA+T?
The MR pin on MAX6701ATKA+T is an active-low manual reset input with internal 50kΩ pullup to VCC. Pulling MR low forces immediate RESET assertion for the full 140ms timeout period and also clears the watchdog timer. When unused, MR should be left unconnected or tied to VCC - floating is not recommended due to noise susceptibility.
Is MAX6701ATKA+T compatible with lead-free PCB assembly processes?
Yes, MAX6701ATKA+T is supplied in lead-free (RoHS-compliant) packaging, indicated by the "+T" suffix. It supports standard reflow profiles including JEDEC J-STD-020D for MSL3 handling and withstands peak temperatures up to +260°C. The SOT23 package is qualified for both tin-lead and lead-free soldering without derating.
MAX6701ATKA+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:
- 3.08V, 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
MAX6701ATKA+T FAQ
1.How can I place an order for MAX6701ATKA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6701ATKA+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 MAX6701ATKA+T reliable?
The price and inventory of MAX6701ATKA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6701ATKA+T is usually 5 days.
3.What payment methods are accepted for MAX6701ATKA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6701ATKA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6701ATKA+T?
MAX6701ATKA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6701ATKA+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 MAX6701ATKA+T?
For technical support, including MAX6701ATKA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6701ATKA+T requirements.
6.How does Aetrix verify that MAX6701ATKA+T is sourced from the original manufacturer or authorized distributors?
All MAX6701ATKA+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 MAX6701ATKA+T meets industry standards.
7.What is the process for return or replacement of MAX6701ATKA+T?
All MAX6701ATKA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6701ATKA+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 MAX6701ATKA+T part is unused and in its original packaging.
Return procedure for MAX6701ATKA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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