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Analog Devices Inc./Maxim Integrated MAX20481CATEA/VY+
- Part No.:
- MAX20481CATEA/VY+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
MAX20481CATEA/VY+.pdf
- Description:
- 5-CHANNEL AUTOMOTIVE SOC SYSTEM
- Quantity:
- Payment:
- Shipping:
Inventory:4,602
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Product details
Overview
MAX20481CATEA/VY+ from Analog Devices is a 6-channel ASIL B-compliant automotive power-system monitor SoC with five single-ended and one differential voltage-monitor input (IN6P/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 domain controller power supervision.
For engineers reviewing the MAX20481CATEA/VY+ datasheet, MAX20481CATEA/VY+ pinout, MAX20481CATEA/VY+ application, or MAX20481CATEA/VY+ equivalent, key selection criteria include channel count (6-input), differential remote-sense capability (IN6P/INM), ASIL B compliance, AEC-Q100 qualification, and programmable reset timeout (6μs–32ms).
Technical Context
The MAX20481CATEA/VY+ implements a mixed-architecture monitoring system: IN1–IN5 use nominal-voltage + %OV/UV configuration with 0.5% threshold resolution and ±1% accuracy for rails ≥1.0V; IN6P/INM uses independent OV/UV comparators with 5mV/step resolution and 0.5V–1.775V range referenced to remote ground sense. All channels include OFF-detection (<0.25V) and 5μs comparator filter time.
Its windowed watchdog features independently configurable closed/open windows (200μs–12.8ms/tick base clock), extended first-update window for SoC boot, and dual-fault detection (too-early/too-late refresh). RESET assertion is fully programmable via RSTMAP register and timed with RHLD[1:0] (6μs/8ms/16ms/32ms).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.35V to 5.50V - powers directly from automotive 3.3V or 5V rails without external regulators. |
| Operating Temperature | -40°C to +125°C - qualified for under-hood and ADAS ECU environments. |
| Monitor Channels | 6 total: IN1–IN5 (single-ended), IN6P/INM (differential) - supports main SoC core, I/O, memory, and high-current supply monitoring with remote ground compensation. |
| OV/UV Threshold Accuracy | ±1% for inputs ≥1.0V - ensures precise fault detection without calibration overhead in production. |
| Watchdog Window Resolution | Configurable from 200μs to 12.8ms per tick - enables fine-grained timing alignment with SoC firmware execution cycles. |
| RESET Timeout Options | 6μs, 8ms, 16ms, or 32ms - selectable via RHLD[1:0] bits to match system recovery timing requirements. |
| Quiescent Current | 150μA - minimizes standby power draw in always-on vehicle domains. |
Pinout & Package
MAX20481CATEA/VY+ uses a 16-pin side-wettable TQFN-EP (3mm × 3mm) package with exposed pad, optimized for automated optical inspection (AOI) and thermal performance (θJA = 44.5°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, IN1 | Single-ended voltage monitor input | Monitors rail 1 with programmable nominal setpoint (0.5V–3.6875V) and ±2.5%–±10% OV/UV thresholds. |
| 2, IN2 | Single-ended voltage monitor input | Same architecture as IN1; supports independent configuration for second power rail. |
| 3, IN3 | Single-ended voltage monitor input | Third dedicated rail monitor with identical precision and resolution as IN1/IN2. |
| 4, IN4 | Single-ended voltage monitor input | Fourth rail monitor; all four share 12.5mV/step resolution and ±1% accuracy. |
| 8, VDD | Power supply input | Accepts 2.35V–5.50V; requires local 0.1μF decoupling capacitor for noise immunity. |
| 9, GND | Ground reference | Primary ground connection; must be tied to EP and all other GND pins at single point. |
| 13, RESET | Open-drain fault indicator | Asserts low on programmed faults; requires external pullup (10kΩ–100kΩ) to logic rail. |
| 14, WDDIS | Active-high watchdog disable | Pull high to disable watchdog while retaining full voltage monitoring functionality. |
| 15, GND | Ground reference | Secondary ground pin; connects to same net as Pin 9 and EP. |
| 16, WDI | Watchdog input | Low-to-high transition refreshes windowed watchdog; used for SoC firmware heartbeat. |
| 10, IN5 | Single-ended voltage monitor input | Extended range (0.5V–5.5V) for higher-voltage rails like camera sensors or radar supplies. |
| 11, IN6P | Differential positive input | Paired with INM to monitor high-current SoC supplies where ground offset matters. |
| 12, INM | Differential negative (remote ground sense) | Must be routed separately to point near IN6P/IN7P connections to reject ground bounce. |
Key Features
| Feature | Design Value |
|---|---|
| ASIL B Compliance | Meets ISO 26262 requirements for standalone operation in automotive safety-critical systems without additional hardware redundancy. |
| Factory OTP Programming | Enables permanent configuration of thresholds, reset mapping, and watchdog behavior during manufacturing-no runtime software required. |
| Error-Correcting Code (ECC) | Protects internal OTP memory against bit flips, ensuring reliable long-term storage of safety-critical configuration data. |
| Side-Wettable TQFN | Enables automated optical inspection of solder joints-critical for zero-defect automotive production lines. |
| AEC-Q100 Grade 0 | Qualified for operation up to +150°C junction temperature, supporting placement in high-thermal-load ADAS modules. |
Applications
| ADAS Domain Controller Power Supervision | Autonomous Driving SoC Supply Monitoring |
|---|---|
|
Use Scenario: Real-time monitoring of multiple voltage rails (core, I/O, memory, SerDes) in NVIDIA Orin or Qualcomm Ride platforms. IC Role / Device Role / Timing Role: Centralized power-system monitor providing fault detection, watchdog supervision, and synchronized RESET signaling across heterogeneous SoC subsystems. Use Value: Reduces BOM count by replacing discrete supervisors and external watchdog ICs while meeting ASIL B diagnostic coverage targets. |
Use Scenario: High-current supply supervision for AI accelerator chips where ground potential shift affects rail integrity. IC Role / Device Role / Timing Role: Differential monitor (IN6P/INM) detects true voltage drop across PCB traces, rejecting ground bounce-induced false trips. Use Value: Enables reliable operation at >100A supply currents without sacrificing OV/UV accuracy or response time (5μs comparator filter). |
| Remote Sensor Module Power Management | Automotive Camera ECU Power Integrity |
|
Use Scenario: Compact power supervision in radar or LiDAR sensor nodes with limited board space and thermal budget. IC Role / Device Role / Timing Role: Single-chip solution integrating six rail monitors, watchdog, and RESET into 3mm × 3mm footprint with 150μA quiescent current. Use Value: Eliminates need for external RC filters or level-shifters while maintaining AEC-Q100 Grade 0 qualification. |
Use Scenario: Dual-rail monitoring (1.8V image sensor + 3.3V ISP) in automotive-grade camera modules requiring fast fault response. IC Role / Device Role / Timing Role: Simultaneous OV/UV detection on IN1 (1.8V rail) and IN5 (3.3V rail) with independent 0.5% step resolution and ±1% accuracy. Use Value: Guarantees <5μs fault-to-assertion latency for critical imaging subsystems, preventing corrupted frame capture. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar power-system monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX20481BATEA/VY+ | 5-channel variant (IN1–IN5 only); lacks IN6P/INM differential pair and remote ground sensing. | Suitable for simpler ECUs without high-current SoC supplies needing ground offset compensation. | Select when monitoring ≤5 rails and no differential sensing is required-reduces cost and layout complexity. |
| TPS659413RWER | TI PMIC with integrated buck/boost converters; includes 4 voltage monitors but no windowed watchdog or ASIL B certification. | Targets power conversion + basic supervision in non-safety-critical infotainment systems. | Choose only if system requires on-chip regulation; not suitable for ASIL B ADAS applications due to missing safety certification and watchdog architecture. |
Compared with MAX20481BATEA/VY+, the MAX20481CATEA/VY+ adds differential monitoring for high-current rails, enabling accurate supervision where ground bounce would corrupt single-ended measurements; versus TPS659413RWER, it provides certified functional safety, deterministic watchdog behavior, and higher channel count without integrated power stages.
Availability
MAX20481CATEA/VY+ is available at Aetrix Electronics and suitable for ADAS domain controllers, autonomous driving SoC platforms, and remote sensor modules requiring stable component supply across automotive production lifecycles.
Supply support for MAX20481CATEA/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 technologies, serving automotive, industrial, and communications markets with safety-certified solutions.
The MAX20481 family was designed specifically for ASIL B-compliant power-system supervision in automotive ADAS and autonomous driving ECUs, integrating voltage monitoring, watchdog, and diagnostics into a single AEC-Q100 qualified device.
FAQ
What is the exact channel configuration of the MAX20481CATEA/VY+?
The MAX20481CATEA/VY+ is the 6-channel variant of the MAX20481 family, featuring five single-ended voltage monitor inputs (IN1–IN5) and one differential pair (IN6P/INM). It does not include IN7P, distinguishing it from the 7-channel MAX20481D variant. This configuration supports comprehensive monitoring of core, I/O, memory, and high-current SoC supplies with remote ground compensation.
Does the MAX20481CATEA/VY+ support AEC-Q100 qualification?
Yes, the MAX20481CATEA/VY+ is AEC-Q100 qualified and rated for Grade 0 operation (−40°C to +150°C junction temperature). This qualification confirms its suitability for under-hood and safety-critical automotive applications including ADAS domain controllers and autonomous driving ECUs where reliability under extreme thermal stress is mandatory.
How is the RESET timeout period configured on the MAX20481CATEA/VY+?
The RESET timeout period on the MAX20481CATEA/VY+ is set via the RHLD[1:0] bits in the RSTCTRL register (address 0x2C), offering four fixed options: 6μs, 8ms, 16ms, or 32ms. This timeout defines how long RESET remains asserted after fault conditions clear, allowing system designers to align recovery timing with SoC boot sequences or firmware initialization routines.
Can the MAX20481CATEA/VY+ monitor high-current supplies with ground offset compensation?
Yes, the MAX20481CATEA/VY+ supports ground offset compensation through its IN6P/INM differential input pair. INM must be routed separately to the point where IN6P connects to the high-current rail, enabling rejection of ground bounce effects. This allows accurate voltage monitoring even when supply currents exceed 100A and cause millivolt-level ground shifts across PCB planes.
What watchdog functionality does the MAX20481CATEA/VY+ provide?
The MAX20481CATEA/VY+ integrates a windowed watchdog with independently configurable closed and open windows, extended first-update window for SoC boot, and dual-fault detection (too-early or too-late refresh). It uses the WDI pin for refresh and WDDIS for hardware disable, and can assert RESET on every violation or only after two consecutive faults-enabling flexible safety-critical supervision.
MAX20481CATEA/VY+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-WFQFN Exposed Pad
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- -
- Type:
- Power Supply Monitor
- Number of Voltages Monitored:
- 6
- Voltage - Threshold:
- 6 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)
MAX20481CATEA/VY+ FAQ
1.How can I place an order for MAX20481CATEA/VY+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20481CATEA/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 MAX20481CATEA/VY+ reliable?
The price and inventory of MAX20481CATEA/VY+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20481CATEA/VY+ is usually 5 days.
3.What payment methods are accepted for MAX20481CATEA/VY+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20481CATEA/VY+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20481CATEA/VY+?
MAX20481CATEA/VY+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20481CATEA/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 MAX20481CATEA/VY+?
For technical support, including MAX20481CATEA/VY+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20481CATEA/VY+ requirements.
6.How does Aetrix verify that MAX20481CATEA/VY+ is sourced from the original manufacturer or authorized distributors?
All MAX20481CATEA/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 MAX20481CATEA/VY+ meets industry standards.
7.What is the process for return or replacement of MAX20481CATEA/VY+?
All MAX20481CATEA/VY+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20481CATEA/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 MAX20481CATEA/VY+ part is unused and in its original packaging.
Return procedure for MAX20481CATEA/VY+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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