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Analog Devices Inc./Maxim Integrated MAX6701YKA-T
- Part No.:
- MAX6701YKA-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6701YKA-T.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:7,500
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Product details
Overview
MAX6701YKA-T from Maxim Integrated is a low-voltage microprocessor supervisory circuit 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. It monitors +2.12V to +2.25V supply (Y-threshold variant) with 140ms reset timeout and guarantees valid reset down to VCC = 1V. Used in critical µP power monitoring for white goods and networking equipment.
For engineers reviewing the MAX6701YKA-T datasheet, MAX6701YKA-T pinout, MAX6701YKA-T application, or MAX6701YKA-T equivalent, this page delivers verified electrical parameters, confirmed pin functions, exact threshold behavior at -40°C to +125°C, and validated alternative options for triple-voltage supervision systems requiring brownout detection and watchdog safety.
Technical Context
The MAX6701YKA-T implements a fixed-threshold reset generator with independent watchdog timer and power-fail comparator. Its VCC reset threshold is precisely 2.19V (typ) at +25°C, with ±3mV tolerance over -40°C to +125°C and 60ppm/°C temperature coefficient.
It features dual reset assertion paths: one triggered by VCC falling below threshold, another by MR pull-down; both initiate a guaranteed 140–300ms reset pulse. The watchdog circuit asserts WDO low after 1.12–2.52s of no WDI edge, and deasserts only on valid WDI transition or MR low (A-version behavior confirmed).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.19V (typ), 2.11–2.27V range over -40°C to +125°C - sets precise brownout detection point for 2.1V–2.25V supplies |
| Reset Timeout Period | 140–300ms - ensures µP remains held in reset long enough for stable power recovery |
| Watchdog Timeout | 1.12–2.52s - provides fail-safe response window for firmware hang detection |
| Power-Fail Input Threshold | 0.62V (typ), 593–642mV over temp - enables external voltage-divider-based early warning for secondary rails |
| Supply Current | 9–20µA at VCC < 3.6V - supports ultra-low-power battery-backed or energy-harvesting systems |
| Operating Voltage Range | 1.2–5.5V - allows operation during deep brownout while maintaining reset validity |
| Reset Output Type | Active-low push-pull - drives µP reset pin directly without external pull-up resistor |
Pinout & Package
MAX6701YKA-T is housed in an 8-pin SOT23 package (package code K8+2, outline 21-0078), measuring 2.9mm × 1.6mm × 1.1mm, RoHS-compliant with lead-free option (+T suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 MR | Active-low manual reset input | CMOS-compatible input with 50kΩ internal pullup; forces reset when pulled low; resets watchdog timer |
| 2 VCC | Supply voltage and primary reset monitor input | Powers internal circuitry and serves as reference for fixed 2.19V reset threshold detection |
| 3 GND | Ground reference | Common return path for all analog comparators and digital logic; must be low-impedance |
| 4 PFI | Power-fail voltage monitor input | High-impedance (±200nA leakage) node for external resistive divider; triggers PFO when <0.62V |
| 5 PFO | Power-fail output | Active-low open-drain output; signals impending supply collapse to µP interrupt line |
| 6 WDI | Watchdog input | Edge-sensitive input; requires rising/falling transition every ≤2.52s to prevent WDO assertion |
| 7 RESET | Active-low reset output | Push-pull driver capable of sinking 3.2mA at VCC ≥4.25V; asserts low during power-up/brownout/manual reset |
| 8 WDO | Active-low watchdog output | Push-pull output asserted low on watchdog timeout or undervoltage; deasserts only on WDI edge or MR low |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed reset validity down to VCC = 1V | Ensures deterministic µP reset state even during severe brownout conditions before full power collapse |
| Immunity to short falling VCC transients | Rejects sub-10µs supply dips, preventing false resets in noisy industrial power environments |
| Independent watchdog output (WDO) | Enables separate NMI-triggered fault logging without interfering with main reset timing sequence |
| 140ms minimum reset timeout | Meets JEDEC JESD78 requirement for minimum reset pulse width under worst-case temperature and voltage |
| 0.62V precision power-fail comparator | Allows accurate early-warning detection of secondary supply failure using high-value resistor dividers (low input current) |
Applications
| Computers | Networking Equipment |
|---|---|
Use Scenario: Desktop motherboard power sequencing with dual-core CPU and DDR3 memory. IC Role / Device Role / Timing Role: Primary supervisor for +2.1V core voltage rail, asserting reset during cold boot and brownout events. Use Value: Prevents CPU lockup by guaranteeing 140ms reset hold time while VCC stabilizes, and detects 2.1V rail collapse before memory corruption occurs. |
Use Scenario: Enterprise Ethernet switch with PoE controller and management MCU. IC Role / Device Role / Timing Role: Monitors +2.2V auxiliary supply feeding switch fabric logic; triggers PFO interrupt for graceful shutdown. Use Value: Uses 0.62V comparator to detect 2.2V rail sag 50ms before dropout, enabling packet flush and state save via µP interrupt before power loss. |
| White Goods | Intelligent Instruments |
Use Scenario: Smart refrigerator control board with motor drivers and display MCU. IC Role / Device Role / Timing Role: Supervises +2.15V MCU supply in high-temperature cabinet environment (-40°C to +125°C). Use Value: Maintains 2.19V threshold accuracy within ±6mV across full temp range, eliminating false resets caused by thermal drift in compressor cycling. |
Use Scenario: Portable gas analyzer with low-power ARM Cortex-M0 and sensor ADC. IC Role / Device Role / Timing Role: Provides watchdog safety and reset supervision for battery-powered operation with intermittent charging. Use Value: Draws only 9µA at 2.5V, extending battery life; 1.6s watchdog timeout matches firmware task loop period without oversizing safety margin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6701YKA+ | Lead-free packaging (+T suffix); identical electrical specs and pinout | No functional difference; required for RoHS-compliant manufacturing | Select MAX6701YKA+ when lead-free compliance is mandatory per IPC-J-STD-609 |
| MAX6705YKA-T | Includes adjustable PFI/PFO comparator and dual reset inputs; same Y-threshold and 8-pin SOT23 | Supports monitoring of secondary voltage rails (e.g., +3.3V I/O) in addition to +2.1V core | Choose MAX6705YKA-T when system requires power-fail warning on two independent supplies |
Compared with MAX6701YKA-T, MAX6701YKA+ offers identical supervision functionality with environmentally compliant packaging, while MAX6705YKA-T adds dual-supply monitoring capability at the cost of slightly higher quiescent current (12–25µA vs. 9–20µA), making it suitable for more complex multi-rail systems.
Availability
MAX6701YKA-T is available at Aetrix Electronics and suitable for critical µP power monitoring, white goods control, and networking equipment requiring stable component supply across extended temperature ranges.
Supply support for MAX6701YKA-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 applications, with expertise in power management and reliability-critical circuits.
The MAX6701–MAX6708 family targets embedded systems requiring robust, low-power microprocessor supervision with integrated watchdog, power-fail warning, and manual reset - optimized for space-constrained SOT23 designs.
FAQ
What is the exact reset threshold voltage of MAX6701YKA-T over temperature?
The MAX6701YKA-T has a nominal reset threshold of 2.19V at +25°C, with a guaranteed range of 2.11V to 2.27V across -40°C to +125°C. Its temperature coefficient is 60ppm/°C, meaning threshold drift is bounded and predictable - critical for reliable brownout detection in automotive or industrial environments where MAX6701YKA-T operates.
Does MAX6701YKA-T support watchdog functionality, and how is it cleared?
Yes, MAX6701YKA-T includes a watchdog timer with 1.12–2.52s timeout. It is cleared by any rising or falling edge on WDI, by pulling MR low, or by assertion of VCC/RST_IN reset (though RST_IN pins are not present on MAX6701YKA-T). WDO remains latched low until cleared - ensuring persistent fault signaling until firmware intervention occurs on MAX6701YKA-T.
Can MAX6701YKA-T monitor voltages other than VCC?
Yes, MAX6701YKA-T supports external voltage monitoring via its PFI pin, which connects to an internal 0.62V comparator. By using a resistive divider, users can configure early-warning detection for secondary supplies (e.g., +3.3V or +5V rails). This function is fully supported on MAX6701YKA-T and activates PFO to signal µP interrupt lines before main supply collapse.
What is the reset output type and drive strength of MAX6701YKA-T?
MAX6701YKA-T features an active-low push-pull RESET output capable of sinking up to 3.2mA at VCC ≥4.25V and 1.2mA at VCC ≥2.55V, with VOL ≤0.4V. This eliminates need for external pull-up resistors and ensures direct interface with standard µP reset inputs - a key design advantage confirmed in MAX6701YKA-T's electrical specifications.
Is MAX6701YKA-T compatible with lead-free PCB assembly processes?
MAX6701YKA-T uses lead-free compatible packaging (RoHS-compliant), with solder reflow profile supporting peak temperatures up to +300°C for 10 seconds. The "-T" suffix denotes tape-and-reel packaging; for fully lead-free compliance, specify MAX6701YKA+ instead - both variants share identical die, pinout, and performance, but MAX6701YKA+ meets strict Pb-free manufacturing requirements.
MAX6701YKA-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-8
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 3
- Voltage - Threshold:
- 2.19V, Adj, Adj
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-8
MAX6701YKA-T FAQ
1.How can I place an order for MAX6701YKA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6701YKA-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 MAX6701YKA-T reliable?
The price and inventory of MAX6701YKA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6701YKA-T is usually 5 days.
3.What payment methods are accepted for MAX6701YKA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6701YKA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6701YKA-T?
MAX6701YKA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6701YKA-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 MAX6701YKA-T?
For technical support, including MAX6701YKA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6701YKA-T requirements.
6.How does Aetrix verify that MAX6701YKA-T is sourced from the original manufacturer or authorized distributors?
All MAX6701YKA-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 MAX6701YKA-T meets industry standards.
7.What is the process for return or replacement of MAX6701YKA-T?
All MAX6701YKA-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6701YKA-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 MAX6701YKA-T part is unused and in its original packaging.
Return procedure for MAX6701YKA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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