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Analog Devices Inc./Maxim Integrated MAX20481AATEC/VY+
- Part No.:
- MAX20481AATEC/VY+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
MAX20481AATEC/VY+.pdf
- Description:
- 5-CHANNEL AUTOMOTIVE SOC SYSTEM
- Quantity:
- Payment:
- Shipping:
Inventory:4,177
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Product details
Overview
The MAX20481AATEC/VY+ from Analog Devices is an ASIL B-compliant automotive power-system monitor SoC with five single-ended and two differential voltage-monitor inputs, ±1% OV/UV threshold accuracy, factory-programmable windowed watchdog, and open-drain RESET output. It operates from -40°C to +125°C and supports 2.35V–5.50V supply, enabling robust supervision of SoC power rails in ADAS and autonomous driving systems.
For engineers reviewing the MAX20481AATEC/VY+ datasheet, MAX20481AATEC/VY+ pinout, MAX20481AATEC/VY+ application, or MAX20481AATEC/VY+ equivalent, this page delivers verified technical context, exact pin functions, confirmed ASIL B compliance, real-world automotive use cases, and two validated alternative parts for system-level power monitoring design.
Technical Context
The MAX20481AATEC/VY+ implements a seven-channel voltage monitoring architecture: IN1–IN5 are single-ended monitors with programmable nominal setpoints (0.5V–5.5V) and ±2.5% to ±10% OV/UV thresholds in 0.5% steps; IN6P/IN7P are differential inputs sharing INM for remote ground-sense, each with independent OV/UV comparators referenced to INM.
Its windowed watchdog features configurable closed/open windows (200μs–12.8ms/tick), extended first-update window for SoC boot sequences, and active-high WDDIS disable control. The RESET output is open-drain, factory-mappable to any monitored channel fault, with four fixed timeout options (6μs, 8ms, 16ms, 32ms).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.35V to 5.50V - powers directly from common automotive rail voltages without external regulators |
| Operating Temperature | -40°C to +125°C - qualified for under-hood and ECU environments per AEC-Q100 |
| OV/UV Threshold Accuracy | ±1% - ensures precise fault detection across full temperature range, critical for ASIL B compliance |
| Monitor Channels | 7 total: 5 single-ended (IN1–IN5), 2 differential (IN6P/IN7P with shared INM) - supports multi-rail SoC supervision |
| Watchdog Type | Configurable windowed watchdog - detects both early and late refresh faults, preventing silent failures |
| RESET Output | Open-drain, programmable mapping, 4 timeout options - enables flexible system reset coordination with MCU/SoC |
| Quiescent Current | 150μA - minimizes standby power draw in always-on automotive subsystems |
Pinout & Package
Package: 16-pin side-wettable TQFN-EP (3mm × 3mm) with exposed pad - supports automated optical inspection (AOI) and high-reliability solder joint formation for automotive production.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN1–IN4 | Single-ended voltage monitor input | Supervises 0.5V–3.6875V rails with ±2.5% to ±10% OV/UV thresholds in 0.5% steps |
| IN5 | Single-ended voltage monitor input | Extends range to 0.5V–5.5V for higher-voltage domain monitoring (e.g., IO or analog supplies) |
| IN6P / IN7P | Differential voltage monitor positive input | Measures voltage relative to INM; supports remote sensing for high-current SoC supplies |
| INM | Common negative reference for IN6P/IN7P | Enables ground offset compensation; must be routed separately near sense points for accuracy |
| WDI | Watchdog input | Low-to-high transition refreshes windowed watchdog; required for SoC health verification |
| WDDIS | Watchdog disable | Active-high signal disables watchdog while preserving all voltage monitoring functionality |
| RESET | Open-drain fault indicator | Asserts low on mapped OV/UV/OFF faults; requires external pullup (10kΩ–100kΩ) |
| VDD / GND / EP | Power and ground connections | VDD accepts 2.35V–5.50V; EP must be soldered to PCB ground plane for thermal and electrical integrity |
Key Features
| Feature | Design Value |
|---|---|
| ASIL B compliance | Validated reliability level for automotive safety-critical power supervision without external redundancy |
| Error-Correcting Code (ECC) | Protects internal OTP memory against bit flips, ensuring persistent configuration integrity over lifetime |
| Factory-programmable RESET mapping | Enables per-channel fault response configuration via RSTMAP register, eliminating post-production firmware changes |
| No external components required | Integrates reference, comparators, watchdog logic, and diagnostics - reduces BOM count and board area |
| AEC-Q100 qualification | Qualified to Grade 0 (-40°C to +150°C junction), confirming suitability for harsh automotive environments |
Applications
| ADAS Domain Controller Power Supervision | Autonomous Driving SoC Rail Monitoring |
|---|---|
|
Use Scenario: Continuous monitoring of multiple voltage rails (core, I/O, memory, analog) in NVIDIA Orin or Qualcomm Snapdragon Ride ADAS domain controllers. IC Role / Device Role / Timing Role: Centralized power-system monitor providing synchronized OV/UV fault detection and watchdog supervision for SoC health assurance. Use Value: Replaces discrete supervisor ICs and external watchdog timers, reducing component count by ≥70% while maintaining ASIL B compliance. |
Use Scenario: Real-time supervision of high-current SoC supply rails where ground bounce affects voltage accuracy. IC Role / Device Role / Timing Role: Differential voltage monitor using IN6P/IN7P + INM to reject ground offset errors during dynamic load transients. Use Value: Enables accurate rail monitoring at SoC package pins rather than PCB traces, improving fault detection fidelity under >50A load steps. |
| Remote Sensor Module Power Integrity | Automotive Gateway MCU Supervision |
|
Use Scenario: Compact power supervision in radar/LiDAR sensor modules requiring minimal footprint and ultra-low quiescent current. IC Role / Device Role / Timing Role: Low-power (150μA) voltage and watchdog monitor enabling always-on operation with battery longevity. Use Value: Eliminates need for external RC filters or precision references, cutting solution size by >40% versus discrete alternatives. |
Use Scenario: Fault-tolerant reset generation for automotive gateway MCUs managing CAN/FlexRay/Ethernet communication stacks. IC Role / Device Role / Timing Role: Programmable RESET output with 6μs–32ms timeout, mapped to critical rail faults and watchdog violations. Use Value: Prevents MCU lockup due to undetected rail collapse or software hang, meeting ISO 26262 diagnostic coverage requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive power-system monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX20480AATEC/VY+ | 4-channel variant (IN1–IN4 only); no IN5, IN6P, IN7P, or INM - smaller feature set, identical package and pinout | Limited to simpler SoCs with ≤4 monitored rails; lacks differential sensing for high-current domains | Select when system requires only basic quad-rail supervision and cost optimization is prioritized over flexibility |
| TPS6594131RWER | TI PMIC with integrated buck/boost converters + 6-channel voltage monitor; no windowed watchdog or INM support | Targets power delivery + monitoring integration; not a standalone monitor - requires redesign of power architecture | Choose only if system needs combined regulation and monitoring, and can accept loss of ASIL B-certified watchdog functionality |
Compared with MAX20481AATEC/VY+, the MAX20480AATEC/VY+ offers pin-compatible simplification for lower-channel-count designs, while the TPS6594131RWER trades dedicated ASIL B monitoring for integrated power conversion - neither provides the full 7-channel differential supervision with windowed watchdog in a drop-in automotive-qualified package.
Availability
MAX20481AATEC/VY+ is available at Aetrix Electronics and suitable for ADAS domain controllers, autonomous driving SoC platforms, remote sensor modules, automotive gateways, and power system supervision requiring stable component supply across extended temperature and ASIL B compliance.
Supply support for MAX20481AATEC/VY+ 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
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving automotive, industrial, communications, and healthcare markets with safety-certified solutions.
The MAX20481 belongs to Analog Devices' automotive power-system monitor family, designed specifically to consolidate voltage supervision, watchdog functionality, and ASIL B compliance into a single IC for next-generation ADAS and autonomous vehicle ECUs.
FAQ
What is the operating temperature range for the MAX20481AATEC/VY+?
The MAX20481AATEC/VY+ operates from -40°C to +125°C ambient temperature and is AEC-Q100 qualified for automotive applications. Its internal circuitry maintains ±1% OV/UV threshold accuracy across this full range, enabling reliable deployment in engine bay, ADAS camera, and radar modules where thermal stress is extreme.
How many voltage monitor inputs does the MAX20481AATEC/VY+ support, and what types are they?
The MAX20481AATEC/VY+ supports seven voltage monitor inputs: IN1 through IN5 are single-ended with programmable nominal setpoints and %OV/%UV thresholds; IN6P and IN7P are differential inputs sharing the INM remote ground-sense pin. This architecture allows precise monitoring of both standard and high-current SoC rails.
Does the MAX20481AATEC/VY+ include a watchdog timer, and how is it configured?
Yes, the MAX20481AATEC/VY+ integrates a factory-programmable windowed watchdog with independently configurable closed and open windows, extended first-update window for SoC boot, and active-high WDDIS disable control. Configuration is done via registers WDCFG1 and WDCFG2, supporting tick rates from 200μs to 12.8ms.
What is the function of the INM pin on the MAX20481AATEC/VY+?
The INM pin on the MAX20481AATEC/VY+ serves as the common negative reference for differential voltage monitors IN6P and IN7P. It enables remote ground-sense capability to compensate for ground voltage offsets in high-current SoC supplies, improving measurement accuracy when routing separate sense lines near the SoC package.
Is the RESET output of the MAX20481AATEC/VY+ open-drain or push-pull, and how is its timeout set?
The RESET output of the MAX20481AATEC/VY+ is open-drain and requires an external pullup resistor (10kΩ–100kΩ). Its assertion timeout is factory-programmable to 6μs, 8ms, 16ms, or 32ms via the RHLD[1:0] bits in the RSTCTRL register, allowing precise coordination with downstream MCU reset timing requirements.
MAX20481AATEC/VY+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-WFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- -
- Type:
- Power Supply Monitor
- Number of Voltages Monitored:
- 4
- Voltage - Threshold:
- 4 Selectable Threshold Combinations
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 28.8ms Minimum
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 16-SW-TQFN (3x3)
MAX20481AATEC/VY+ FAQ
1.How can I place an order for MAX20481AATEC/VY+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20481AATEC/VY+ 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 MAX20481AATEC/VY+ reliable?
The price and inventory of MAX20481AATEC/VY+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20481AATEC/VY+ is usually 5 days.
3.What payment methods are accepted for MAX20481AATEC/VY+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20481AATEC/VY+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20481AATEC/VY+?
MAX20481AATEC/VY+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20481AATEC/VY+ 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 MAX20481AATEC/VY+?
For technical support, including MAX20481AATEC/VY+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20481AATEC/VY+ requirements.
6.How does Aetrix verify that MAX20481AATEC/VY+ is sourced from the original manufacturer or authorized distributors?
All MAX20481AATEC/VY+ 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 MAX20481AATEC/VY+ meets industry standards.
7.What is the process for return or replacement of MAX20481AATEC/VY+?
All MAX20481AATEC/VY+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20481AATEC/VY+, 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 MAX20481AATEC/VY+ part is unused and in its original packaging.
Return procedure for MAX20481AATEC/VY+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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