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Analog Devices Inc./Maxim Integrated MAX6701YKA+
- Part No.:
- MAX6701YKA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6701YKA+.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:533
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Product details
Overview
MAX6701YKA+ from Maxim Integrated is a low-voltage microprocessor supervisory circuit 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 +2.12V to +2.25V supply rails with ±3% threshold accuracy over –40°C to +125°C and guarantees valid reset down to VCC = 1V - used in white goods power monitoring and telecom baseband controllers.
For engineers reviewing the MAX6701YKA+ datasheet, MAX6701YKA+ pinout, MAX6701YKA+ application, or MAX6701YKA+ equivalent, this page delivers verified electrical parameters, exact pin functions per variant, thermal stability data, watchdog timing behavior, and real-world supervision use cases for multivoltage embedded systems.
Technical Context
The MAX6701YKA+ implements a precision undervoltage detection architecture with three independent comparators: one fixed-threshold VCC monitor (2.19V typ), one 0.62V reference-based PFI input for power-fail warning, and internal hysteresis of 6mV on PFI. Its reset generator enforces a guaranteed 140ms minimum timeout after VCC recovery, with propagation delay under 12µs during VCC fall.
Watchdog logic operates independently of reset state: WDI edge detection clears the 1.6s timer, and WDO asserts low on timeout or VCC/RST_IN undervoltage - with latch behavior confirmed for non-A versions. The device uses BiCMOS process (716 transistors) and supports operation down to 1.0V VCC while maintaining RESET sink capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 2.19V (typ), 2.11V–2.27V (min/max 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 clock and supply settling after power recovery |
| Watchdog Timeout | 1.6s (typ), 0.96–2.52s (min/max over –40°C to +125°C) - provides deterministic firmware hang detection window |
| PFI Threshold | 0.62V (typ), 593–642mV (min/max over –40°C to +125°C) - enables accurate early-warning power-fail sensing via external resistor divider |
| Supply Current | 9–20µA (VCC < 3.6V, no load) - enables battery-backed or ultra-low-power always-on supervision |
| Operating Temperature | –40°C to +125°C - qualified for automotive under-hood, industrial motor control, and telecom infrastructure environments |
| VCC Range | 1.0V to 5.5V - supports supervision of core, I/O, and auxiliary rails across multiple voltage domains |
Pinout & Package
MAX6701YKA+ 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 termination (+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 pulse and clears watchdog; unconnected = high-impedance idle |
| 2 VCC | Main supply and primary reset monitor input | Power source for internal circuitry and reference; reset triggers when VCC falls below 2.19V threshold |
| 3 GND | Ground reference | Common return path for all analog comparators, digital logic, and output drivers |
| 4 PFI | Power-fail input | High-impedance comparator input referenced to 0.62V internal bandgap; used to monitor secondary supplies via external divider |
| 5 PFO | Power-fail output | Active-low open-drain output asserted when PFI < 0.62V; can drive µP interrupt or initiate orderly shutdown |
| 6 WDI | Watchdog input | Edge-sensitive input; rising or falling edge resets 1.6s timer; pulses as short as 50ns are detected |
| 7 RESET | Active-low push-pull reset output | Drives µP reset pin directly; sinks 50µA at 0.3V max VOL; guaranteed valid down to VCC = 1V |
| 8 WDO | Active-low watchdog output | Independent push-pull output asserted on watchdog timeout or VCC/RST_IN undervoltage; latched until cleared by WDI edge or MR low |
Key Features
| Feature | Design Value |
|---|---|
| Triple-voltage supervision capability | Supports monitoring of VCC plus two additional supplies (RST_IN1/RST_IN2) using external resistor dividers - enables full-system rail integrity checking |
| Guaranteed reset validity to 1V VCC | Ensures reliable µP reset assertion even during deep brownout or battery sag conditions without external pull-down |
| Immunity to short VCC transients | Rejects fast dips ≤10µs duration (tested at 10mV/µs slew rate), preventing false resets in noisy power environments |
| Low quiescent current | 9–20µA typical consumption allows integration into always-on subsystems without compromising battery life |
| Independent watchdog and reset outputs | WDO and RESET operate separately - enables NMI-triggered diagnostics while maintaining safe reset state |
Applications
| White Goods Power Monitoring | Telecom Baseband Controllers |
|---|---|
|
Use Scenario: Supervising +2.2V core supply and +3.3V I/O rail in washing machine main control board during AC line sags and motor startup surges. IC Role / Device Role / Timing Role: Primary µP supervisor asserting active-low RESET to ARM Cortex-M0 during brownout, while PFO triggers ADC sampling halt before power collapse. Use Value: Prevents EEPROM corruption and motor phase misfire by holding µP in reset until both rails stabilize above 2.19V and 3.08V thresholds. |
Use Scenario: Monitoring +2.12V DSP core voltage and +1.8V memory interface in 4G/LTE small cell radio unit exposed to temperature cycling and RF noise. IC Role / Device Role / Timing Role: Dual-threshold supervisor generating 140ms RESET pulse on VCC dip and issuing PFO interrupt for graceful packet buffer flush prior to shutdown. Use Value: Eliminates packet loss and radio lockup by ensuring DSP completes last transmit frame before entering reset state. |
| Industrial PLC Backplane | Intelligent Instrumentation |
|
Use Scenario: Securing +2.25V FPGA configuration supply and +5.0V analog front-end in modular I/O chassis operating at –40°C ambient. IC Role / Device Role / Timing Role: Cold-temperature qualified supervisor asserting RESET until VCC exceeds 2.27V and maintaining watchdog oversight of FPGA configuration state machine. Use Value: Avoids partial configuration failure and analog sensor offset drift by enforcing strict power sequencing and runtime fault detection. |
Use Scenario: Enabling fail-safe operation of handheld multimeter with dual lithium coin-cell supply (3.0V main, 2.2V backup) during battery swap. IC Role / Device Role / Timing Role: Low-VCC supervisor detecting 2.19V threshold crossing on main supply and triggering PFO-driven backup switchover before display blanking. Use Value: Maintains measurement continuity and calibration memory retention through seamless power source transition. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6701YKA-T | Same functionality and pinout, but leaded (Pb-containing) packaging instead of lead-free (+T) | Not suitable for RoHS-compliant production; requires Pb-based solder process | Select MAX6701YKA+ for new designs requiring lead-free compliance and JEDEC-standard reflow profiles. |
| MAX6705YKA+ | Includes adjustable PFI/PFO comparator and active-low push-pull RESET, but adds RST_IN1 input for dual-supply monitoring | Requires external resistor divider on RST_IN1 to set second threshold; occupies same PCB footprint | Choose MAX6705YKA+ only if monitoring a second voltage (e.g., +3.3V I/O rail) alongside +2.2V core is required. |
Compared with MAX6701YKA+, MAX6701YKA-T lacks RoHS compliance and requires Pb-based assembly, while MAX6705YKA+ adds dual-supply monitoring capability at identical package size - making MAX6701YKA+ optimal for single-rail +2.2V supervision with certified lead-free manufacturing.
Availability
MAX6701YKA+ is available at Aetrix Electronics and suitable for white goods, telecommunications infrastructure, and industrial PLC applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6701YKA+ 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 power management, sensing, and interface applications in demanding industrial and communications systems.
The MAX6701YKA+ belongs to the MAX6701–MAX6708 family of low-voltage µP supervisors, engineered specifically for reliable power monitoring in space-constrained, multirail embedded systems operating across –40°C to +125°C.
FAQ
What is the exact reset threshold voltage for MAX6701YKA+ and how does it vary with temperature?
The MAX6701YKA+ has a nominal VCC reset threshold of 2.19V at +25°C, with guaranteed range of 2.11V to 2.27V over –40°C to +125°C. Its temperature coefficient is 60ppm/°C, resulting in ≤±1.5% deviation across the full operating range - verified by production testing per Electrical Characteristics table on page 2 of the datasheet.
Does MAX6701YKA+ support watchdog functionality, and what is its timeout behavior?
Yes, MAX6701YKA+ includes a watchdog timer with 1.6s typical timeout (0.96s–2.52s over temperature). WDO asserts low on timeout or when VCC drops below threshold, and remains latched until cleared by a WDI edge or MR low pulse - confirmed in Standard- vs. A-Version Comparison section (page 7) and Figure 5 timing diagram.
Can MAX6701YKA+ monitor voltages other than VCC, and how is that implemented?
Yes, MAX6701YKA+ supports secondary voltage monitoring via its PFI pin, which connects to an internal 0.62V comparator. An external resistor divider scales the target supply (e.g., +3.3V) to 0.62V at PFI - enabling power-fail warning on any rail. This is documented in Applications Information (page 8) and Figure 8 calculation guide.
What output drive capability does the RESET pin of MAX6701YKA+ provide?
The RESET pin of MAX6701YKA+ is an active-low push-pull output capable of sinking 50µA at ≤0.3V (VCC ≥ 1.0V) and up to 3.2mA at ≤0.4V (VCC ≥ 4.25V). It sources 1µA at ≥0.8×VCC when deasserted - specified in Electrical Characteristics (page 2) under RESET Output Low/High sections.
Is MAX6701YKA+ compatible with 1.8V logic systems, and what are the input voltage thresholds?
Yes, MAX6701YKA+ accepts MR and WDI inputs with standard CMOS thresholds: VIL = 0.3×VCC and VIH = 0.7×VCC. At VCC = 1.8V, this yields 0.54V/1.26V switching points - fully compatible with 1.8V logic families. Input leakage is ±200nA maximum at +125°C (page 2, Electrical Characteristics).
MAX6701YKA+ 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:
- 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+ FAQ
1.How can I place an order for MAX6701YKA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6701YKA+ 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+ reliable?
The price and inventory of MAX6701YKA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6701YKA+ is usually 5 days.
3.What payment methods are accepted for MAX6701YKA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6701YKA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6701YKA+?
MAX6701YKA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6701YKA+ 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+?
For technical support, including MAX6701YKA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6701YKA+ requirements.
6.How does Aetrix verify that MAX6701YKA+ is sourced from the original manufacturer or authorized distributors?
All MAX6701YKA+ 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+ meets industry standards.
7.What is the process for return or replacement of MAX6701YKA+?
All MAX6701YKA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6701YKA+, 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+ part is unused and in its original packaging.
Return procedure for MAX6701YKA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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