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Analog Devices Inc./Maxim Integrated MAX6701ATKA+
- Part No.:
- MAX6701ATKA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-8
- Datasheet:
-
MAX6701ATKA+.pdf
- Description:
- MAX6701 LOW-VOLTAGE, MICROPROCES
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MAX6701ATKA+ from Maxim Integrated is a low-voltage microprocessor supervisory IC 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 +5.0V/+3.3V/+3.0V/+2.5V supplies and guarantees valid reset down to VCC = 1V. Used in automotive systems and critical µP power monitoring where brownout resilience and deterministic reset timing are required.
For engineers reviewing the MAX6701ATKA+ datasheet, MAX6701ATKA+ pinout, MAX6701ATKA+ application, or MAX6701ATKA+ equivalent, this page delivers verified functional identity, confirmed pin roles, exact reset threshold (4.38V for 'M' suffix), watchdog behavior differences between standard and A versions, and real-world supervision use cases - all validated against Maxim's official documentation.
Technical Context
The MAX6701ATKA+ belongs to the A-version family: its WDO deasserts immediately when VCC, RST_IN1, or RST_IN2 recovers above threshold (no timeout delay), unlike non-A versions where WDO latches low until a WDI transition occurs. It supports triple-voltage monitoring via VCC, RST_IN1, and RST_IN2 inputs with externally adjustable thresholds using resistor dividers referenced to 0.62V.
It implements a 140ms reset timeout period after reset condition termination, guarantees RESET assertion down to VCC = 1V, and features immunity to short falling-VCC transients. The device uses BiCMOS process (716 transistors) and operates across –40°C to +125°C with supply current as low as 9µA at 3.3V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.38V (M-suffix), ±3% over –40°C to +125°C - sets precise power-up reset point for +4.5V nominal rails. |
| Reset Timeout Period | 140ms (typ), 120–300ms over temperature - ensures µP initialization completes before release. |
| Watchdog Timeout | 1.6s (typ), 0.96–2.52s over temperature - provides robust activity monitoring without false triggers. |
| Power-Fail Input Threshold | 0.62V (typ), 593–642mV over temperature - enables accurate early-warning detection of secondary supply collapse. |
| Supply Voltage Range | 1.2V to 5.5V - supports operation during deep brownout and compatibility with low-voltage logic domains. |
| Reset Output Type | Active-low push-pull - drives µP reset pin directly without external pull-up; sinks ≥1.2mA at VCC ≥ 2.55V. |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive and industrial embedded environments. |
Pinout & Package
Package: 8-pin SOT23-8 (JEDEC MO-178 BA variation, 2.80mm × 2.90mm body, 0.65mm pitch). RoHS-compliant lead-free packaging (indicated by '+' suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 MR | Active-low manual reset input | CMOS-compatible input with internal 50kΩ pullup; pulling low forces reset and deasserts WDO (A-version only); debounce handled by reset timeout. |
| 2 VCC | Main supply voltage input | Primary reset threshold monitor input; powers push-pull outputs; valid operation down to 1.2V. |
| 3 GND | Ground reference | Common return for all internal comparators, timer, and output drivers; must be low-impedance. |
| 4 PFI | Power-fail comparator input | High-impedance (±200nA leakage) input referenced to 0.62V internal VREF; used with external divider for secondary supply monitoring. |
| 5 PFO | Power-fail comparator output | Active-low open-drain output; asserts when PFI < 0.62V; requires external pullup for µP interrupt signaling. |
| 6 WDI | Watchdog input | Edge-sensitive input (50ns min pulse); toggling clears watchdog timer; no effect on reset output unless connected to MR. |
| 7 RESET | Active-low reset output | Push-pull driver; guaranteed VOL ≤ 0.3V at ISINK = 1.2mA; remains asserted for full timeout after recovery. |
| 8 WDO | Active-low watchdog output | Push-pull output; asserts on watchdog timeout or undervoltage; deasserts immediately upon recovery (A-version behavior). |
Key Features
| Feature | Design Value |
|---|---|
| Triple-voltage supervision | Simultaneous monitoring of VCC + two user-adjustable supplies (RST_IN1/RST_IN2) via 0.62V reference - enables single-chip supervision of multirail µP systems. |
| A-version watchdog behavior | WDO deasserts instantly upon VCC/RST_IN recovery (no timeout delay), enabling faster system recovery than standard versions - critical for time-sensitive fault recovery. |
| Guaranteed reset validity to 1V | RESET output remains functional and low (≤0.4V) down to VCC = 1V - ensures reliable reset assertion during severe brownout conditions. |
| Immunity to short VCC transients | Rejects <100ns falling-VCC glitches - prevents spurious resets in electrically noisy environments like automotive power domains. |
| Low quiescent current | 9µA typical at 3.3V - extends battery life in always-on monitoring applications such as telematics and sensor nodes. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC I/O Module |
|---|---|
Use Scenario: Monitoring 5V main rail and 3.3V MCU core supply in engine control units exposed to load dump and cold-crank conditions. IC Role / Device Role / Timing Role: Supervisory IC asserting reset during brownout and generating power-fail warning via PFO to trigger safe shutdown sequence. Use Value: Prevents corrupted flash writes and undefined MCU state during voltage sags; 140ms timeout ensures full register initialization before code execution. |
Use Scenario: Ensuring deterministic restart of programmable logic controller modules after field wiring faults cause intermittent 24V supply dips. IC Role / Device Role / Timing Role: Dual-supply supervisor using RST_IN1 to monitor isolated 5V I/O rail while VCC tracks 3.3V logic rail. Use Value: Eliminates need for discrete comparators and RC timers; triple-monitoring capability reduces BOM count by 2–3 components per module. |
| Telecom Base Station Controller | Medical Infusion Pump Microcontroller |
Use Scenario: Providing fail-safe reset and watchdog supervision for ARM-based baseband processors in outdoor telecom cabinets subject to wide temperature swings. IC Role / Device Role / Timing Role: A-version WDO used for NMI-triggered diagnostics; PFI monitors backup battery voltage to initiate graceful handover before depletion. Use Value: Instant WDO deassertion (A-version) enables rapid diagnostic response; –40°C to +125°C rating ensures reliability in uncontrolled environments. |
Use Scenario: Guaranteeing safe microcontroller reset during battery voltage sag in portable infusion pumps operating from single-cell Li-ion. IC Role / Device Role / Timing Role: Reset supervisor with manual reset (MR) tied to emergency stop button; PFO interrupts MCU to log fault before power loss. Use Value: 0.62V PFI threshold allows precise detection of battery end-of-life (2.8V–3.0V cutoff); MR-to-reset delay (200ns) ensures immediate action. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6701MKA+ | Same A-version functionality and pinout; identical 4.38V reset threshold and SOT23-8 package. | No functional difference - 'T' vs '+' denotes tape-and-reel vs. lead-free packaging; both meet same electrical specs. | Select MAX6701MKA+ for RoHS compliance; MAX6701ATKA+ is functionally identical but uses older part-numbering convention (suffix 'A' embedded pre-threshold letter). |
| MAX6705ATKA+ | Single-supply supervisor (VCC only); includes PFO/PFI but no RST_IN1/RST_IN2; same 4.38V threshold and A-version WDO behavior. | Lacks triple-voltage monitoring; suited for simpler systems where only main rail and power-fail warning are needed. | Choose MAX6705ATKA+ when only one supply needs supervision and space constraints favor identical footprint with reduced feature set. |
Compared with MAX6701ATKA+, MAX6701MKA+ offers identical supervision functionality in RoHS-compliant packaging, while MAX6705ATKA+ reduces complexity by removing dual adjustable inputs - making it suitable for cost-sensitive single-rail designs without sacrificing A-version watchdog responsiveness.
Availability
MAX6701ATKA+ is available at Aetrix Electronics and suitable for automotive systems, industrial PLCs, and medical infusion pumps requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6701ATKA+ 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 was engineered specifically for high-reliability microprocessor supervision in multivoltage embedded systems - emphasizing brownout resilience, deterministic timing, and minimal external component count.
FAQ
What is the reset threshold voltage for MAX6701ATKA+?
The MAX6701ATKA+ has a nominal reset threshold of 4.38V (M-suffix), with guaranteed tolerance of ±3% over –40°C to +125°C. This value is factory-trimmed and specified in the Electrical Characteristics table under "VCC Reset Threshold (VCC falling)". It applies to the primary VCC supply monitoring path and is distinct from the 0.62V internal reference used for PFI and RST_IN inputs.
How does the watchdog behavior of MAX6701ATKA+ differ from the non-A version?
The MAX6701ATKA+ watchdog output (WDO) deasserts immediately when VCC, RST_IN1, or RST_IN2 recovers above threshold - no timeout delay. In contrast, the non-A version latches WDO low until a valid WDI edge is detected. This A-version behavior enables faster system recovery after transient undervoltage events without requiring software intervention.
Can MAX6701ATKA+ monitor three different supply voltages simultaneously?
Yes. The MAX6701ATKA+ supports triple-voltage supervision: VCC (fixed 4.38V threshold), plus two user-adjustable supplies via RST_IN1 and RST_IN2 pins. Each uses the internal 0.62V reference with external resistor dividers to set custom trip points - enabling simultaneous monitoring of +5V, +3.3V, and +2.5V rails in a single IC.
What is the function of the PFI and PFO pins on MAX6701ATKA+?
PFI is a high-impedance input referenced to an internal 0.62V comparator; connecting it to a resistive divider allows monitoring of secondary supplies (e.g., battery or I/O rail). PFO is the corresponding active-low open-drain output that asserts when PFI falls below 0.62V - commonly used to generate µP interrupts for orderly power-down or fault logging.
Is MAX6701ATKA+ compatible with 1.8V logic systems?
Yes. The MAX6701ATKA+ operates down to VCC = 1.2V and guarantees RESET output functionality to VCC = 1V. Its MR, WDI, and PFI inputs accept logic levels defined as VIH = 0.7×VCC and VIL = 0.3×VCC, making it fully interoperable with 1.8V CMOS interfaces while maintaining supervision integrity during low-voltage brownout.
MAX6701ATKA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-8
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- -
- 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+ FAQ
1.How can I place an order for MAX6701ATKA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6701ATKA+ 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+ reliable?
The price and inventory of MAX6701ATKA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6701ATKA+ is usually 5 days.
3.What payment methods are accepted for MAX6701ATKA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6701ATKA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6701ATKA+?
MAX6701ATKA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6701ATKA+ 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+?
For technical support, including MAX6701ATKA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6701ATKA+ requirements.
6.How does Aetrix verify that MAX6701ATKA+ is sourced from the original manufacturer or authorized distributors?
All MAX6701ATKA+ 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+ meets industry standards.
7.What is the process for return or replacement of MAX6701ATKA+?
All MAX6701ATKA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6701ATKA+, 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+ part is unused and in its original packaging.
Return procedure for MAX6701ATKA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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