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Analog Devices Inc./Maxim Integrated MAX20481AATEC/VY+T
- Part No.:
- MAX20481AATEC/VY+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
MAX20481AATEC/VY+T.pdf
- Description:
- 5-CHANNEL AUTOMOTIVE SOC SYSTEM
- Quantity:
- Payment:
- Shipping:
Inventory:4,139
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Product details
Overview
MAX20481AATEC/VY+T from Analog Devices is an ASIL B-compliant automotive power-system monitor SoC with five single-ended and two differential voltage-monitor inputs (IN1–IN5, IN6P/IN7P with shared INM), factory-programmable OV/UV thresholds (±2.5% to ±10%, ±1% accuracy), windowed watchdog with WDI/WDDIS control, and open-drain RESET output. It operates from -40°C to +125°C and supports ADAS and autonomous driving SoC power supervision.
For engineers reviewing the MAX20481AATEC/VY+T datasheet, MAX20481AATEC/VY+T pinout, MAX20481AATEC/VY+T application, or MAX20481AATEC/VY+T equivalent, this page delivers verified functional identity, validated 16-pin TQFN package mapping, confirmed seven-channel monitoring architecture, factory-trimmed threshold accuracy, and real-world automotive supervisory use cases - all aligned to AEC-Q100 qualification and ASIL B system-level compliance.
Technical Context
The MAX20481AATEC/VY+T implements a deterministic, OTP-programmable voltage monitoring architecture with five single-ended channels (IN1–IN5) supporting nominal setpoints from 0.5V to 5.5V and ±2.5%–±10% OV/UV thresholds in 0.5% steps, plus two differential channels (IN6P/IN7P referenced to INM) with independent OV/UV comparators and 0.5V–1.775V absolute threshold range.
Its integrated windowed watchdog features configurable closed/open timing windows (200μs–12.8ms/tick), extended first-update window for SoC boot sequences, and dual-fault detection (too-early/too-late refresh); RESET assertion is programmable per channel and includes fixed timeout options (6μs, 8ms, 16ms, 32ms) with open-drain output requiring external pullup.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.35V to 5.50V - powers device across wide automotive rail range without external regulation |
| Operating Temperature | -40°C to +125°C ambient - qualified for under-hood and ECU environments |
| Voltage Monitor Channels | 7 total: 5 single-ended (IN1–IN5), 2 differential (IN6P/IN7P with shared INM) - enables comprehensive SoC rail supervision including high-current supplies |
| OV/UV Threshold Accuracy | ±1% for inputs ≥1.0V - ensures precise fault detection without calibration overhead |
| Watchdog Window Configurability | Closed/open windows independently set via registers; first-update window extended for SoC boot - eliminates false resets during firmware initialization |
| RESET Output Type | Open-drain with 4 programmable timeout durations (6μs/8ms/16ms/32ms) - supports flexible system reset sequencing and noise immunity |
| Quiescent Current | 150μA - enables always-on monitoring in low-power vehicle subsystems |
Pinout & Package
MAX20481AATEC/VY+T is housed in a 16-pin side-wettable TQFN-EP package (3mm × 3mm) with exposed pad, optimized for automated optical inspection (AOI) and thermal performance in automotive PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN1–IN4 | Single-ended voltage monitor input | Supports 0.5V–3.6875V nominal rails with ±2.5%–±10% OV/UV thresholds in 0.5% steps |
| IN5 | Single-ended voltage monitor input | Extended range: 0.5V–5.5V nominal; same OV/UV resolution and accuracy as IN1–IN4 |
| IN6P / IN7P | Differential voltage monitor positive input | Paired with INM; measures voltage difference for high-current supply monitoring with remote ground sense |
| INM | Common negative reference for IN6P/IN7P | Enables accurate differential sensing; must be routed separately near monitored supply points |
| WDI | Watchdog input | Low-to-high transition refreshes windowed watchdog; required for SoC health supervision |
| WDDIS | Watchdog disable control | Active-high signal; pulling high disables watchdog while preserving full voltage monitoring functionality |
| RESET | Open-drain fault indicator/reset output | Asserts low on programmed fault conditions; timeout duration configurable in register |
| VDD / GND / EP | Power supply and grounding | VDD accepts 2.35V–5.5V; EP must be soldered to PCB ground plane for thermal and electrical integrity |
Key Features
| Feature | Design Value |
|---|---|
| ASIL B compliance | Meets ISO 26262 requirements for standalone safety-critical monitoring in automotive systems |
| Factory-programmable RESET mapping | Each of seven monitor channels can be individually enabled/disabled for RESET assertion via RSTMAP register |
| Error-correcting code (ECC) on OTP | Ensures integrity of factory-programmed thresholds and configuration data over lifetime |
| No external components required | Integrated reference, comparators, oscillator, and logic eliminate need for discrete support circuitry |
| AEC-Q100 Grade 0 qualification | Validated for operation up to +150°C junction temperature - exceeds standard automotive requirements |
Applications
| ADAS Domain Controller Power Supervision | Autonomous Driving SoC Rail Monitoring |
|---|---|
Use Scenario: Real-time monitoring of multiple voltage rails (e.g., core, I/O, memory, SerDes) powering NVIDIA Orin or Qualcomm Ride platforms in L2+/L3 ADAS ECUs. IC Role / Device Role / Timing Role: Centralized power-system monitor providing synchronized OV/UV fault detection and watchdog supervision for SoC health management. Use Value: Reduces BOM count by replacing discrete supervisors and external watchdog ICs while meeting ASIL B diagnostic coverage requirements. |
Use Scenario: Supervising high-current 1.8V/1.2V/0.8V rails feeding AI accelerator clusters in zonal architectures with distributed power delivery. IC Role / Device Role / Timing Role: Differential monitoring (IN6P/IN7P + INM) detects ground shift-induced faults in high-dI/dt SoC supplies. Use Value: Enables accurate voltage margining despite PCB ground bounce, improving functional safety validation margin. |
| Remote Sensor Module Power Integrity | Automotive Gateway MCU Supervision |
Use Scenario: Compact 12V-to-3.3V/1.8V power tree supervision in radar/lidar sensor nodes where space and reliability are critical. IC Role / Device Role / Timing Role: Five single-ended monitors track buck converter outputs; windowed watchdog verifies MCU firmware execution. Use Value: Single-chip solution meets AEC-Q100 and ASIL B without layout compromises in constrained sensor housings. |
Use Scenario: Monitoring 5V/3.3V/1.2V rails and watchdog refresh signals in central gateway ECUs managing CAN FD, Ethernet, and LIN communication stacks. IC Role / Device Role / Timing Role: RESET output tied to microcontroller's NMI input; WDDIS allows safe firmware update mode entry. Use Value: Programmable timeout and fault mapping enable adaptive reset behavior across boot, runtime, and OTA update phases. |
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+T | 4-channel variant (IN1–IN4 only); no IN5, IN6P, IN7P, or INM pins - smaller footprint but reduced monitoring scope | Suitable for simpler SoCs with ≤4 critical rails; lacks differential sensing for high-current supplies | Select when system requires only four monitored rails and board space is highly constrained |
| TPS659413ARSLR | TI PMIC with integrated DC/DC converters; monitoring limited to internal rails only - no external voltage monitor inputs | Used in tightly coupled power + monitoring designs; not a drop-in replacement for standalone supervision | Choose when co-locating regulation and monitoring is preferred, and external rail supervision is unnecessary |
Compared with MAX20480AATEC/VY+T, the MAX20481AATEC/VY+T adds three extra monitor channels and differential sensing capability for higher complexity SoCs; versus TPS659413ARSLR, it provides dedicated external rail supervision without embedded power conversion - enabling modular, scalable power architecture design.
Availability
MAX20481AATEC/VY+T is available at Aetrix Electronics and suitable for ADAS domain controllers, autonomous driving SoC modules, and automotive gateway ECUs requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant power supervision.
Supply support for MAX20481AATEC/VY+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
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving automotive, industrial, communications, and healthcare markets with precision, reliability, and safety-certified solutions.
The MAX20481AATEC/VY+T belongs to Analog Devices' automotive power-system monitor family, designed specifically to consolidate voltage supervision, watchdog functionality, and ASIL-compliant diagnostics into a single chip for next-generation ADAS and autonomous driving ECUs.
FAQ
What is the exact monitoring channel configuration of the MAX20481AATEC/VY+T?
The MAX20481AATEC/VY+T implements seven voltage-monitor channels: five single-ended inputs (IN1–IN5) and two differential inputs (IN6P and IN7P) sharing a common remote ground-sense terminal (INM). This configuration is explicitly defined in the MAX20481D variant pinout and confirmed in the device's Electrical Characteristics table for IN6P/IN7P/INM parameters. The MAX20481AATEC/VY+T part number suffix "A" does not denote the 4-channel variant; per Analog Devices' ordering information and package marking, MAX20481AATEC/VY+T corresponds to the full 7-channel MAX20481D configuration.
Does the MAX20481AATEC/VY+T support differential voltage monitoring, and how is it implemented?
Yes, the MAX20481AATEC/VY+T supports differential voltage monitoring via IN6P and IN7P inputs, each referenced to the shared INM (remote ground-sense) pin. Unlike single-ended channels, IN6P and IN7P use independent OV and UV comparators with absolute threshold ranges of 0.5V to 1.775V relative to INM - enabling accurate detection of ground-shift-induced faults in high-current SoC supplies. The INM pin must be routed separately to the local ground point near the monitored supply to realize this benefit.
What watchdog features does the MAX20481AATEC/VY+T provide, and how is it configured?
The MAX20481AATEC/VY+T integrates a windowed watchdog with independently configurable closed and open timing windows (200μs to 12.8ms/tick), an extended first-update window for SoC boot sequences, and dual-fault detection (too-early/too-late refresh). Configuration is performed via WDCDIV, WDCFG1, and WDCFG2 registers. Watchdog refresh is triggered by a low-to-high transition on the WDI pin, and the function can be disabled via the active-high WDDIS pin without affecting voltage monitoring.
How is the RESET output of the MAX20481AATEC/VY+T configured and used in system design?
The MAX20481AATEC/VY+T features an open-drain RESET output that asserts low when any enabled fault condition occurs (e.g., OV/UV on mapped channels or watchdog violation). Its timeout duration is programmable to 6μs, 8ms, 16ms, or 32ms via the RHLD[1:0] bits in RSTCTRL. System design requires an external pullup resistor (10kΩ–100kΩ) to the logic supply; RESET mapping to individual monitor channels is fully configurable through the RSTMAP register, enabling selective fault response.
Is the MAX20481AATEC/VY+T qualified for automotive applications, and what certifications does it hold?
Yes, the MAX20481AATEC/VY+T is AEC-Q100 Grade 0 qualified (operating junction temperature up to +150°C) and designed to meet ASIL B compliance per ISO 26262 for standalone safety applications. It incorporates ECC on internal OTP memory, built-in self-test (BIST) mapping to RESET, and redundant diagnostics - all verified and documented in Analog Devices' official MAX20481 datasheet Rev 6 (12/2021).
MAX20481AATEC/VY+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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+T FAQ
1.How can I place an order for MAX20481AATEC/VY+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20481AATEC/VY+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 MAX20481AATEC/VY+T reliable?
The price and inventory of MAX20481AATEC/VY+T 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+T is usually 5 days.
3.What payment methods are accepted for MAX20481AATEC/VY+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20481AATEC/VY+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20481AATEC/VY+T?
MAX20481AATEC/VY+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20481AATEC/VY+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 MAX20481AATEC/VY+T?
For technical support, including MAX20481AATEC/VY+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20481AATEC/VY+T requirements.
6.How does Aetrix verify that MAX20481AATEC/VY+T is sourced from the original manufacturer or authorized distributors?
All MAX20481AATEC/VY+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 MAX20481AATEC/VY+T meets industry standards.
7.What is the process for return or replacement of MAX20481AATEC/VY+T?
All MAX20481AATEC/VY+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX20481AATEC/VY+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 MAX20481AATEC/VY+T part is unused and in its original packaging.
Return procedure for MAX20481AATEC/VY+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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