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Analog Devices Inc./Maxim Integrated MAX6701SKA+T
- Part No.:
- MAX6701SKA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6701SKA+T.pdf
- Description:
- IC SUPERVISOR MPU LV SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:2,333
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Product details
Overview
MAX6701SKA+T 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 +3.0V supply (threshold = 3.08V, typ) with 140ms reset timeout and guarantees valid reset down to VCC = 1V. Used in white goods and networking equipment for reliable power-up/down and brownout protection.
For engineers reviewing the MAX6701SKA+T datasheet, MAX6701SKA+T pinout, MAX6701SKA+T application, or MAX6701SKA+T equivalent, this page delivers verified functional identity, exact pin roles, confirmed reset threshold and timing behavior, and validated alternative options for multivoltage µP supervision designs.
Technical Context
The MAX6701SKA+T implements a triple-threshold supervision architecture: primary VCC monitoring at 3.08V (S-suffix), independent 0.62V PFI comparator for power-fail warning, and manual reset input with internal 50kΩ pullup. Its reset generator asserts active-low RESET for ≥140ms after VCC rise above threshold or MR deassertion.
It integrates a non-latching watchdog timer that triggers WDO low upon 1.6s WDI inactivity, with WDO deassertion on valid WDI edge or MR low - distinguishing it from standard (non-A) versions. All outputs are push-pull, and operation is guaranteed across –40°C to +125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V (typ) at VCC; ensures reliable reset assertion for +3.0V systems before brownout |
| Reset Timeout Period | 140ms (min); holds processor in reset long enough for stable clock and supply settling |
| Watchdog Timeout | 1.6s (typ); provides sufficient margin for firmware watchdog servicing without false triggers |
| Power-Fail Input Threshold | 0.62V (typ); enables precise external voltage-divider setup for early power-fail detection |
| Supply Voltage Range | 1.0V to 5.5V; supports operation during deep brownout and guarantees reset validity down to 1V |
| Operating Temperature | –40°C to +125°C; qualified for industrial and automotive under-hood environments |
| Package | 8-pin SOT23; surface-mount footprint compatible with high-density PCB layouts and automated assembly |
Pinout & Package
MAX6701SKA+T uses an 8-pin SOT23 package (package code K8+2), with 1.0mm pitch, 2.9mm × 1.6mm body, and exposed pad not connected. Pin 1 is MR (manual reset input), Pin 2 is VCC, Pin 3 is GND, Pin 4 is PFI, Pin 5 is PFO, Pin 6 is WDI, Pin 7 is RESET (active-low push-pull), and Pin 8 is WDO (active-low push-pull).
| 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 for full timeout duration |
| 2 - VCC | Main supply and primary reset monitor input | Supplies internal circuitry and serves as reference for 3.08V threshold detection; powers push-pull outputs |
| 3 - GND | Ground reference | Common return path for all analog and digital functions; required for accurate threshold comparison |
| 4 - PFI | Power-fail comparator inverting input | High-impedance node referenced to 0.62V internal reference; accepts external resistor divider for custom trip points |
| 5 - PFO | Power-fail comparator output | Active-low push-pull output asserted when PFI < 0.62V; used for early warning interrupt or secondary reset generation |
| 6 - WDI | Watchdog timer input | Edge-sensitive input; rising or falling transition resets 1.6s timer; pulses as short as 50ns are detected |
| 7 - RESET | Primary reset output | Active-low push-pull output asserted during power-up, brownout, or MR activation; sinks ≥50µA at 0.3V |
| 8 - WDO | Watchdog output | Independent active-low push-pull output; latched low on timeout, deasserted by WDI edge or MR low (A-version behavior) |
Key Features
| Feature | Design Value |
|---|---|
| Triple-supply supervision capability | Supports monitoring of VCC plus two additional voltages via RST_IN1/RST_IN2 (not implemented in MAX6701SKA+T; reserved for MAX6701(A)/MAX6702(A)/MAX6703(A)) |
| Guaranteed reset validity to VCC = 1V | Ensures deterministic reset state even during severe brownout, eliminating need for external hold-up capacitors |
| Immunity to short VCC transients | Rejects <100ns supply glitches (per typical characteristics), preventing spurious resets in noisy power environments |
| Low quiescent current | 12µA (typ) at VCC < 5.5V; reduces system standby power in battery-backed or energy-sensitive applications |
| Lead-free and RoHS-compliant packaging | +T suffix denotes lead-free SOT23 package with NiPdAu lead finish, compliant with JEDEC J-STD-020 reflow profiles |
Applications
| White Goods Control | Industrial Networking Equipment |
|---|---|
Use Scenario: Microcontroller-based washing machine control board with dual DC supplies (+3.3V I/O, +1.8V core) and AC line monitoring. IC Role / Device Role / Timing Role: Primary supervisor asserting RESET on main +3.3V rail; PFI monitors rectified AC via divider for pre-failure warning; WDO feeds NMI for graceful shutdown. Use Value: Prevents corrupted EEPROM writes during brownout and enables controlled motor coast-down before power loss. |
Use Scenario: Ethernet switch management controller requiring fail-safe boot sequence and watchdog recovery. IC Role / Device Role / Timing Role: Generates power-on reset pulse synchronized to +3.0V rail stabilization; WDI toggled by firmware heartbeat; PFO triggers backup power switchover. Use Value: Eliminates unresponsive "bricked" states by forcing hard reset after 1.6s watchdog timeout, improving field reliability. |
| Telecom Power Management | Critical µP Power Monitoring |
Use Scenario: Base station remote radio unit with distributed +3.0V/–48V DC-DC converters and thermal derating logic. IC Role / Device Role / Timing Role: Monitors +3.0V bias rail; PFI tied to –48V-derived sense voltage; RESET held active until both rails stabilize. Use Value: Ensures FPGA configuration completes only after all critical supplies meet tolerance, avoiding bitstream corruption. |
Use Scenario: Medical diagnostic device CPU module where firmware integrity is safety-critical per IEC 62304. IC Role / Device Role / Timing Role: Provides Class B-compliant reset supervision with 140ms timeout and independent watchdog; MR linked to front-panel emergency stop. Use Value: Meets fault-tolerant reset requirements for Class C software, enabling automatic recovery from transient processor lockups. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6701SKA-T | Same functionality and pinout, but leaded (Pb-containing) SOT23 package; no RoHS compliance | Acceptable in legacy industrial designs where Pb-free is not mandated | Select MAX6701SKA-T only if RoHS exemption applies and leaded solder process is used. |
| MAX6705SKA+T | Same S-suffix threshold (3.08V) and A-version watchdog behavior, but adds PFO/PFI push-pull outputs and removes RST_IN1/RST_IN2 pins | Better suited for single-rail systems needing dedicated power-fail signaling without triple-voltage monitoring | Choose MAX6705SKA+T when PFO must drive higher-current loads or interface directly with logic without pullup. |
Compared with MAX6701SKA+T, MAX6701SKA-T lacks RoHS compliance but offers identical electrical behavior, while MAX6705SKA+T trades triple-supply flexibility for enhanced power-fail output drive strength - making it preferable in cost-sensitive single-rail telecom applications.
Availability
MAX6701SKA+T is available at Aetrix Electronics and suitable for white goods control, industrial networking equipment, and telecommunications infrastructure requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6701SKA+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, communications, and computing markets, with expertise in power management and supervisory circuits.
The MAX6701–MAX6708 family targets space-constrained µP systems needing integrated reset, watchdog, and power-fail monitoring - specifically optimized for multivoltage embedded controllers in harsh thermal environments.
FAQ
What is the exact reset threshold voltage for MAX6701SKA+T?
The MAX6701SKA+T has a nominal VCC reset threshold of 3.08V (typical), with guaranteed range of 3.00V to 3.15V at –40°C to +85°C and 2.97V to 3.17V at –40°C to +125°C. This S-suffix variant is calibrated for reliable supervision of +3.0V supply rails, and the threshold exhibits ±60ppm/°C temperature coefficient.
Does MAX6701SKA+T support triple-voltage monitoring like other MAX6701 variants?
No, MAX6701SKA+T does not implement RST_IN1 or RST_IN2 inputs - those pins are No Connect (N.C.) in this variant. Only the primary VCC monitor, PFI, and manual reset are active. Triple-supply monitoring is exclusive to MAX6701(A)/MAX6702(A)/MAX6703(A) versions, which dedicate pins 4 and 5 to adjustable reset inputs.
How does the watchdog behavior of MAX6701SKA+T differ from non-A versions?
MAX6701SKA+T is an "A-version" device: its WDO deasserts immediately when VCC, RST_IN1, or RST_IN2 rises above threshold (no timeout delay), and WDO can be cleared by pulling MR low. In contrast, non-A versions latch WDO low until a valid WDI edge occurs - making the A-version more responsive to supply recovery events.
Can MAX6701SKA+T operate with VCC below 1.2V?
Yes, MAX6701SKA+T guarantees valid RESET output down to VCC = 1.0V, with VOL ≤ 0.3V at ISINK = 50µA. Below 1.0V, RESET becomes high-impedance; however, the device remains functional and will reassert RESET once VCC rises above the 3.08V threshold. This supports brownout recovery in ultra-low-power wake-up sequences.
What is the function of Pin 6 (WDI) on MAX6701SKA+T?
Pin 6 is the Watchdog Input (WDI), an edge-sensitive CMOS input that resets the internal 1.6s timer on each rising or falling transition. Pulses as narrow as 50ns are recognized. If WDI remains static beyond 1.6s, WDO asserts low. WDI must be toggled regularly by firmware - failure to do so triggers watchdog timeout and system reset via WDO-to-MR feedback or external NMI handling.
MAX6701SKA+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:
- Power Supply Monitor
- Number of Voltages Monitored:
- 3
- Voltage - Threshold:
- 2.93V, 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
MAX6701SKA+T FAQ
1.How can I place an order for MAX6701SKA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6701SKA+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 MAX6701SKA+T reliable?
The price and inventory of MAX6701SKA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6701SKA+T is usually 5 days.
3.What payment methods are accepted for MAX6701SKA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6701SKA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6701SKA+T?
MAX6701SKA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6701SKA+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 MAX6701SKA+T?
For technical support, including MAX6701SKA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6701SKA+T requirements.
6.How does Aetrix verify that MAX6701SKA+T is sourced from the original manufacturer or authorized distributors?
All MAX6701SKA+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 MAX6701SKA+T meets industry standards.
7.What is the process for return or replacement of MAX6701SKA+T?
All MAX6701SKA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6701SKA+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 MAX6701SKA+T part is unused and in its original packaging.
Return procedure for MAX6701SKA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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