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Analog Devices Inc./Maxim Integrated MAX20481CATEA/VY+T
- Part No.:
- MAX20481CATEA/VY+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
MAX20481CATEA/VY+T.pdf
- Description:
- 5-CHANNEL AUTOMOTIVE SOC SYSTEM
- Quantity:
- Payment:
- Shipping:
Inventory:1,158
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Product details
Overview
MAX20481CATEA/VY+T from Analog Devices is a 6-channel ASIL B-compliant automotive power-system monitor IC 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 SoC supply supervision.
For engineers reviewing the MAX20481CATEA/VY+T datasheet, MAX20481CATEA/VY+T pinout, MAX20481CATEA/VY+T application, or MAX20481CATEA/VY+T equivalent, this page delivers verified functional scope, validated pin roles, confirmed AEC-Q100 qualification, exact channel configuration (6-input variant), and real-world diagnostic mapping for automotive safety-critical power monitoring.
Technical Context
The MAX20481CATEA/VY+T implements a dual-mode voltage monitoring architecture: IN1–IN5 use nominal-voltage + %OV/UV configuration with 0.5% step resolution and ±1% threshold accuracy above 1.0V; IN6P/INM employs independent differential OV/UV comparators referenced to INM, supporting remote ground-sense for high-current SoC rails. All channels include fast 5µs comparator filter response and 0.25V OFF-detection capability.
Its windowed watchdog features configurable closed/open windows (200μs–12.8ms/tick), extended first-update window for SoC boot sequences, and fault detection on both early and late refreshes. 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 battery range without external regulation |
| Operating Temperature | -40°C to +125°C - qualified for under-hood and ECU environments per AEC-Q100 |
| Input Channels | 6 total: IN1–IN5 (single-ended), IN6P/INM (differential) - matches SoC multi-rail monitoring needs |
| OV/UV Threshold Accuracy | ±1% for inputs ≥1.0V - ensures precise fault detection without calibration overhead |
| Watchdog Window Resolution | Configurable in 200μs increments up to 12.8ms - enables fine-grained SoC activity timing control |
| RESET Timeout Options | 6μs / 8ms / 16ms / 32ms - selectable via RHLD[1:0] bits for system-level fault recovery timing |
| Quiescent Current | 150μA - enables always-on monitoring without significant battery drain |
Pinout & Package
MAX20481CATEA/VY+T uses a 16-pin side-wettable TQFN-EP (3mm × 3mm) package with exposed pad, optimized for automotive reflow inspection and thermal performance (θJA = 44.5°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN1–IN5 | Single-ended voltage monitor inputs | Supervise core, I/O, analog, and auxiliary SoC rails; each supports factory-programmable OV/UV thresholds |
| IN6P | Differential positive input (with INM) | Monitors high-current SoC supply rail with remote ground sensing to reject PCB IR drop |
| INM | Differential negative reference (shared) | Must be routed separately to local ground point near IN6P/IN7P connections for accurate differential measurement |
| WDI | Watchdog input | Low-to-high transition refreshes windowed watchdog; required for SoC health verification |
| WDDIS | Watchdog disable | Active-high signal; pulling high disables watchdog while preserving full voltage monitoring functionality |
| RESET | Open-drain fault indicator | Asserts low on mapped OV/UV/OFF faults; timeout duration programmable for system reset coordination |
| VDD / GND / EP | Power and ground terminals | VDD accepts 2.35–5.5V; all GND pins and EP must be connected to common system ground plane |
Key Features
| Feature | Design Value |
|---|---|
| ASIL B compliance | Meets ISO 26262 requirements for standalone operation in automotive safety applications |
| Error-Correcting Code (ECC) | Protects internal OTP memory against bit errors during read/write, ensuring reliable configuration retention |
| Factory-programmable RESET mapping | RSTMAP register allows per-channel enable/disable of OV/UV fault triggering on RESET pin |
| Remote ground-sense capability | IN6P/INM differential pair compensates for ground shift in high-current SoC supplies |
| No external components required | Integrated references, oscillators, and comparators eliminate need for discrete support circuitry |
Applications
| ADAS Domain Controller Power Supervision | Autonomous Driving SoC Supply Monitoring |
|---|---|
Use Scenario: Real-time monitoring of multiple voltage rails (core, GPU, memory, I/O) in NVIDIA Orin or Qualcomm Ride platforms. IC Role / Device Role / Timing Role: Centralized power-system monitor providing synchronized OV/UV fault reporting and watchdog supervision for SoC boot and runtime integrity. Use Value: Reduces BOM count by replacing five discrete supervisors; enables ASIL B-compliant diagnostics without FPGA or software overhead. |
Use Scenario: Ensuring stable operation of AI accelerator voltage domains during dynamic workload transitions in L3/L4 autonomous vehicles. IC Role / Device Role / Timing Role: Differential IN6P/INM channel monitors high-current VDD_GPU rail while rejecting ground bounce induced by switching transients. Use Value: Prevents false resets caused by ground shift-critical for maintaining continuous sensor fusion and path planning execution. |
| Remote Sensor Hub Power Integrity | Automotive Gateway ECU Power Management |
Use Scenario: Supervising isolated 3.3V and 5V supplies powering radar, camera, and LiDAR sensor interfaces in zone controllers. IC Role / Device Role / Timing Role: Single-chip solution delivering simultaneous multi-rail fault detection with programmable RESET timeout for graceful sensor shutdown. Use Value: Eliminates need for separate supervisor ICs per rail, reducing PCB area and improving thermal margin in compact sensor modules. |
Use Scenario: Managing power sequencing and fault response across CAN, Ethernet, and LIN interface supplies in central gateway ECUs. IC Role / Device Role / Timing Role: RESET output drives microcontroller reset line; WDDIS pin enables watchdog disable during firmware update mode. Use Value: Enables safe in-field updates without compromising power supervision-supports UDS-based bootloader workflows. |
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+T | 5-channel variant (IN1–IN5 only); lacks IN6P/INM differential input | Suitable for simpler SoCs without high-current rails requiring remote ground sense | Select when monitoring only single-ended rails and cost optimization is prioritized over differential capability |
| TPS659413RWER | TI PMIC with integrated buck/boost regulators; power monitor is secondary function with fewer programmable thresholds | Used in full-power-management systems where regulation + monitoring are co-integrated | Choose when board space allows regulator integration and voltage-setting flexibility outweighs pure monitoring precision |
Compared with MAX20481BATEA/VY+T, the MAX20481CATEA/VY+T adds critical differential sensing for high-current SoC rails; versus TPS659413RWER, it delivers higher OV/UV accuracy (±1% vs typical ±2.5%), dedicated watchdog timing control, and no regulator overhead-making it optimal for standalone, safety-certified monitoring.
Availability
MAX20481CATEA/VY+T is available at Aetrix Electronics and suitable for ADAS domain controllers, autonomous driving SoC platforms, and automotive gateway ECUs requiring stable component supply with full AEC-Q100 traceability and ASIL B compliance documentation.
Supply support for MAX20481CATEA/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, and communications markets with safety-certified solutions.
The MAX20481 family is designed specifically for automotive power-system supervision, targeting ASIL B-compliant monitoring of SoC and processor voltage rails in ADAS and autonomous driving systems.
FAQ
What is the exact channel configuration of the MAX20481CATEA/VY+T?
The MAX20481CATEA/VY+T 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 is explicitly defined in the Pin Configurations section of the datasheet.
Does the MAX20481CATEA/VY+T support remote ground sensing, and how is it implemented?
Yes, the MAX20481CATEA/VY+T supports remote ground sensing exclusively through the IN6P/INM differential input pair. INM serves as the shared negative reference for both IN6P and (in the D variant) IN7P. To implement remote sensing, INM must be routed separately to the local ground point near the IN6P connection-not tied directly to the IC's ground plane-to reject PCB IR drop in high-current SoC supplies.
How is the watchdog window timing configured on the MAX20481CATEA/VY+T?
The MAX20481CATEA/VY+T watchdog window timing is configured via three registers: WDCDIV sets the base clock tick (200μs to 12.8ms), WDCFG1 defines closed (CLO[3:0]) and open (OPN[3:0]) window lengths in multiples of that tick, and WDCFG2 configures the extended first-update window. All settings are stored in factory-programmable OTP and accessible via I²C-compatible interface.
What are the RESET timeout options available on the MAX20481CATEA/VY+T, and how are they selected?
The MAX20481CATEA/VY+T offers four RESET timeout durations: 6μs, 8ms, 16ms, and 32ms. These are selected using the RHLD[1:0] bits in the RSTCTRL register (address 0x2C). The timeout begins after all triggering fault conditions are cleared and holds RESET low for the selected duration before deassertion, enabling deterministic system recovery timing.
Is the MAX20481CATEA/VY+T AEC-Q100 qualified, and what grade does it meet?
Yes, the MAX20481CATEA/VY+T is AEC-Q100 qualified and meets Grade 0 specifications (operating temperature range -40°C to +125°C ambient), as stated in the Benefits and Features section and confirmed in the Package Information table. This qualification supports deployment in engine bay, transmission, and ADAS ECU applications.
MAX20481CATEA/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:
- 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+T FAQ
1.How can I place an order for MAX20481CATEA/VY+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20481CATEA/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 MAX20481CATEA/VY+T reliable?
The price and inventory of MAX20481CATEA/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 MAX20481CATEA/VY+T is usually 5 days.
3.What payment methods are accepted for MAX20481CATEA/VY+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20481CATEA/VY+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20481CATEA/VY+T?
MAX20481CATEA/VY+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20481CATEA/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 MAX20481CATEA/VY+T?
For technical support, including MAX20481CATEA/VY+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20481CATEA/VY+T requirements.
6.How does Aetrix verify that MAX20481CATEA/VY+T is sourced from the original manufacturer or authorized distributors?
All MAX20481CATEA/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 MAX20481CATEA/VY+T meets industry standards.
7.What is the process for return or replacement of MAX20481CATEA/VY+T?
All MAX20481CATEA/VY+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX20481CATEA/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 MAX20481CATEA/VY+T part is unused and in its original packaging.
Return procedure for MAX20481CATEA/VY+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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