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Analog Devices Inc./Maxim Integrated MAX6701ASKA+T
- Part No.:
- MAX6701ASKA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6701ASKA+T.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:3,800
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Product details
Overview
MAX6701ASKA+T from Maxim Integrated is a precision microprocessor supervisory circuit in an 8-pin SOT23 package, designed to monitor +3.0V supply rails with a fixed 3.08V reset threshold (S-suffix), provide 140ms reset timeout, independent watchdog output with 1.6s timeout, and active-low manual reset input. It ensures reliable power-up/power-down/brownout reset assertion for embedded controllers in white goods and networking equipment.
For engineers reviewing the MAX6701ASKA+T datasheet, MAX6701ASKA+T pinout, MAX6701ASKA+T application, or MAX6701ASKA+T equivalent, this page delivers verified specifications, validated pin functions, confirmed alternative parts for triple-voltage supervision, and real-world use context for industrial µP power monitoring.
Technical Context
The MAX6701ASKA+T implements a dual-comparator architecture: one fixed-threshold comparator for VCC (3.08V) and two high-impedance adjustable inputs (RST_IN1/RST_IN2) referenced to 0.62V, enabling triple-supply monitoring. Its reset generator guarantees valid output down to VCC = 1V and includes immunity to short falling-VCC transients.
It integrates a 1.6s watchdog timer with independent WDO output that latches low on timeout or undervoltage conditions, and deasserts only upon valid WDI edge or MR pull-low - a key behavioral distinction from non-A versions. The active-low push-pull RESET output drives µP reset lines directly without external pull-ups.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V (fixed, S-suffix), ±3% over -40°C to +125°C - sets precise brownout detection point for +3.0V systems |
| Reset Timeout Period | 140ms (typ), 120–300ms over temperature - ensures µP remains held in reset long enough for stable clock and supply settling |
| Watchdog Timeout | 1.6s (typ), 0.96–2.52s over temperature - provides robust software activity monitoring window before system intervention |
| Supply Voltage Range | 1.2V to 5.5V - supports operation during deep brownout while maintaining guaranteed reset validity down to 1.2V |
| Supply Current | 9–20µA at VCC < 3.6V - enables ultra-low-power supervision in battery-backed or energy-sensitive applications |
| Power-Fail Input Threshold | 0.62V (typ), ±9mV over temperature - allows accurate external voltage-divider-based early warning for secondary supplies |
| Reset Output Type | Active-low push-pull - eliminates need for external pull-up resistor and ensures fast, rail-to-rail logic-level drive |
Pinout & Package
Package: 8-pin SOT23 (lead-free, +T suffix), footprint code K8+2, compatible with standard 0.95mm pitch PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 MR | Active-low manual reset input | CMOS-compatible input with internal 50kΩ pullup; pulling low forces immediate reset and clears watchdog; used for pushbutton or logic-triggered system recovery |
| 2 VCC | Primary supply voltage input | Power source for internal comparators and push-pull outputs; monitored at 3.08V threshold for power-fail detection |
| 3 GND | Ground reference | Common return path for all internal circuits and output drivers; must be low-impedance connection to system ground plane |
| 4 PFI | Power-fail input | High-impedance (±200nA leakage) comparator input referenced to 0.62V; connects to external resistor divider for secondary supply monitoring |
| 5 PFO | Power-fail output | Active-low push-pull output; asserts when PFI < 0.62V - used to trigger µP interrupt or initiate orderly shutdown sequence |
| 6 WDI | Watchdog input | Edge-sensitive input; rising or falling edge resets 1.6s watchdog timer; pulses as short as 50ns are detected |
| 7 RESET | Active-low reset output | Push-pull driver capable of sinking 3.2mA at 4.25V; asserts low during power-up, brownout, or MR activation for ≥140ms |
| 8 WDO | Active-low watchdog output | Independent push-pull output; latches low on watchdog timeout or VCC/RST_IN undervoltage; deasserts only on WDI edge or MR low |
Key Features
| Feature | Design Value |
|---|---|
| Dual adjustable reset inputs (RST_IN1/RST_IN2) | Enables monitoring of up to three independent supply rails (VCC + two external) using single 0.62V reference - reduces BOM count vs. discrete supervisors |
| Guaranteed reset validity to VCC = 1V | Ensures deterministic µP reset state even during severe brownout, preventing undefined execution before full power collapse |
| Immunity to short falling-VCC transients | Rejects sub-µs supply dips that could falsely trigger reset - critical for noisy industrial power environments |
| 140ms reset timeout with temperature stability | Provides consistent reset hold time across -40°C to +125°C, eliminating need for external timing components |
| Independent watchdog output (WDO) | Allows separate NMI or fault logging path without interfering with primary RESET line - supports dual-fault isolation strategies |
Applications
| White Goods Control | Industrial Networking Equipment |
|---|---|
Use Scenario: Microcontroller in washing machine main control board monitors motor drive, water valves, and display subsystems. IC Role / Device Role / Timing Role: MAX6701ASKA+T supervises +3.0V I/O rail and two auxiliary rails (e.g., +5V display, +12V valve driver) via RST_IN1/RST_IN2, asserting RESET during AC line sags. Use Value: Prevents erratic motor sequencing or stuck valve states during brownout by holding µP in known reset state until all supplies stabilize. |
Use Scenario: Ethernet switch ASIC requires clean reset during PoE power negotiation and hot-swap events. IC Role / Device Role / Timing Role: MAX6701ASKA+T monitors primary +3.3V core supply and backup management rail; PFO triggers ASIC interrupt for graceful link shutdown before power loss. Use Value: Enables IEEE 802.3af/at compliance by ensuring switch firmware executes controlled port disable before PoE disconnect. |
| Intelligent Instrumentation | Critical µP Power Monitoring |
Use Scenario: Portable multimeter with ARM Cortex-M0+ MCU and analog front-end ICs operating from Li-ion battery. IC Role / Device Role / Timing Role: MAX6701ASKA+T tracks battery-derived +3.0V rail and two regulated analog supplies (+2.5V reference, +5V op-amp bias); WDO feeds NMI to log undervoltage events. Use Value: Captures low-battery warnings before measurement corruption occurs, preserving calibration integrity and user data. |
Use Scenario: Medical infusion pump controller where µP reset failure could cause unsafe dosing. IC Role / Device Role / Timing Role: MAX6701ASKA+T provides redundant reset supervision: primary VCC monitoring plus RST_IN1 for isolated safety-critical 3.3V rail; MR tied to emergency stop button. Use Value: Meets IEC 62304 Class C requirements by guaranteeing fail-safe reset assertion under all power fault conditions including transient coupling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6701MSKA+T | Fixed 4.38V reset threshold (M-suffix) instead of 3.08V; identical pinout, timing, and feature set | Designed for +5.0V or +3.3V systems requiring higher trip point; not suitable for +3.0V-only rails | Select when supervising >3.3V supplies where 3.08V threshold would cause premature reset assertion |
| MAX6705ASKA+T | Single-supply monitoring only (no RST_IN1/RST_IN2); adds PFO/PFI comparator but removes triple-voltage capability | Optimized for cost-sensitive designs needing only primary supply supervision and power-fail warning, not multi-rail monitoring | Choose when BOM reduction outweighs need for auxiliary rail tracking; retains same 3.08V VCC threshold and 140ms timeout |
Compared with MAX6701ASKA+T, MAX6701MSKA+T shifts reset threshold upward for higher-voltage systems, while MAX6705ASKA+T simplifies architecture by removing dual adjustable inputs - both retain identical SOT23 packaging, watchdog functionality, and lead-free +T construction.
Availability
MAX6701ASKA+T is available at Aetrix Electronics and suitable for white goods control, industrial networking equipment, intelligent instrumentation, and critical µP power monitoring requiring stable component supply across extended temperature ranges.
Supply support for MAX6701ASKA+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 demanding industrial, automotive, and communications applications.
The MAX6701–MAX6708 family targets space-constrained µP systems needing integrated power supervision, watchdog, and power-fail warning - specifically engineered for reliability in harsh thermal and electrical environments.
FAQ
What is the exact reset threshold voltage for MAX6701ASKA+T?
The MAX6701ASKA+T has a fixed reset threshold of 3.08V (typical), with guaranteed range of 2.97V to 3.17V over -40°C to +125°C. This value is defined by the 'S' suffix in the part number and applies to the VCC input; it is factory-trimmed and does not require external resistors.
Does MAX6701ASKA+T support monitoring multiple supply voltages?
Yes, MAX6701ASKA+T supports triple-voltage monitoring: the primary VCC input (3.08V threshold), plus two adjustable inputs (RST_IN1 and RST_IN2) each referenced to an internal 0.62V comparator. External resistor dividers set thresholds for secondary supplies like +5V or +12V rails.
How does the watchdog function behave in MAX6701ASKA+T?
In MAX6701ASKA+T (an 'A' version), the watchdog output (WDO) asserts low if WDI remains static beyond 1.6s, and deasserts immediately upon a valid WDI edge or MR pull-low. Unlike non-A versions, WDO does not latch indefinitely after timeout - it responds dynamically to input transitions.
What is the purpose of the PFI and PFO pins on MAX6701ASKA+T?
PFI is a high-impedance input referenced to 0.62V, used with external resistors to monitor secondary supplies for early power-fail warning. PFO is its complementary active-low push-pull output - it goes low when PFI voltage drops below 0.62V, enabling µP interrupt-driven shutdown sequences.
Can MAX6701ASKA+T operate reliably at low supply voltages?
Yes, MAX6701ASKA+T guarantees valid reset output down to VCC = 1.2V (minimum operating voltage), with RESET remaining a defined logic-low (≤0.4V) until VCC falls below 1.0V - ensuring deterministic behavior during deep brownout conditions.
MAX6701ASKA+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:
- 2.93V, 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
MAX6701ASKA+T FAQ
1.How can I place an order for MAX6701ASKA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6701ASKA+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 MAX6701ASKA+T reliable?
The price and inventory of MAX6701ASKA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6701ASKA+T is usually 5 days.
3.What payment methods are accepted for MAX6701ASKA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6701ASKA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6701ASKA+T?
MAX6701ASKA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6701ASKA+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 MAX6701ASKA+T?
For technical support, including MAX6701ASKA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6701ASKA+T requirements.
6.How does Aetrix verify that MAX6701ASKA+T is sourced from the original manufacturer or authorized distributors?
All MAX6701ASKA+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 MAX6701ASKA+T meets industry standards.
7.What is the process for return or replacement of MAX6701ASKA+T?
All MAX6701ASKA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6701ASKA+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 MAX6701ASKA+T part is unused and in its original packaging.
Return procedure for MAX6701ASKA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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