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Analog Devices Inc./Maxim Integrated MAX20481BATEA/VY+T
- Part No.:
- MAX20481BATEA/VY+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
MAX20481BATEA/VY+T.pdf
- Description:
- 5-CHANNEL AUTOMOTIVE SOC SYSTEM
- Quantity:
- Payment:
- Shipping:
Inventory:3,397
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Product details
Overview
MAX20481BATEA/VY+T from Analog Devices is a 5-channel ASIL-B-compliant automotive power-system monitor IC designed for SoC supply supervision in ADAS and autonomous driving systems. It features five single-ended voltage-monitor inputs (IN1–IN5), ±1% OV/UV threshold accuracy, factory-programmable reset behavior, and operates from -40°C to +125°C ambient temperature.
For engineers reviewing the MAX20481BATEA/VY+T datasheet, MAX20481BATEA/VY+T pinout, MAX20481BATEA/VY+T application, or MAX20481BATEA/VY+T equivalent, key selection criteria include channel count (5), differential remote-sense capability (not present in this variant), watchdog window configurability, RESET timeout options (6μs/8ms/16ms/32ms), and AEC-Q100 qualification status.
Technical Context
The MAX20481B implements a fixed 5-input monitoring architecture with IN1–IN4 supporting 0.5V–3.6875V nominal setpoints (12.5mV/step) and IN5 extending to 5.5V (20mV/step). All five channels use factory-trimmed ±2.5% to ±10% OV/UV thresholds in 0.5% steps with ±1% accuracy for voltages ≥1.0V.
It integrates a windowed watchdog with independently configurable closed/open windows (200μs–12.8ms/tick), extended first-update window for SoC boot sequences, and an active-high WDDIS disable pin. The open-drain RESET output supports programmable fault mapping and four fixed timeout durations.
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 - meets under-hood automotive environmental requirements |
| OV/UV Threshold Accuracy | ±1% for inputs ≥1.0V - ensures precise rail supervision critical for ASIL-B compliance |
| Input Channels | 5 single-ended (IN1–IN5) - matches typical SoC core/peripheral rail count without overdesign |
| RESET Timeout Options | 6μs, 8ms, 16ms, or 32ms - selectable via RHLD[1:0] bits for system-level fault recovery timing control |
| Watchdog Clock Range | 200μs/tick to 12.8ms/tick - enables fine-grained timing alignment with SoC firmware execution cycles |
| Quiescent Current | 150μA - minimizes parasitic load on always-on vehicle subsystems |
Pinout & Package
MAX20481BATEA/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 PCB assemblies.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN1–IN5 | Single-ended voltage monitor inputs | Accept DC rails up to 5.5V; each independently configurable for OV/UV thresholds and nominal setpoint |
| VDD | Main supply input | 2.35V–5.50V operation; requires local 0.1μF decoupling capacitor |
| GND (Pins 5,6,7,9,10,11,12,15) | Ground reference | Multiple low-inductance ground connections required; EP must be soldered to PCB ground plane |
| RESET | Open-drain fault indicator | Asserts low on mapped faults; requires external pullup (10kΩ–100kΩ) to logic rail |
| WDI | Watchdog refresh input | Low-to-high transition resets watchdog timer; used during normal SoC operation |
| WDDIS | Watchdog disable control | Active-high signal; pulling high disables watchdog while preserving all voltage monitoring functions |
Key Features
| Feature | Design Value |
|---|---|
| ASIL-B compliance | Validated reliability level for standalone safety-critical automotive monitoring applications |
| Factory-programmable thresholds | OV/UV setpoints trimmed at wafer test; eliminates post-silicon calibration effort |
| No external components required | Self-contained solution reduces BOM count and layout area vs discrete supervisor + watchdog designs |
| ECC on internal OTP | Ensures integrity of configuration data stored in one-time-programmable memory |
| AEC-Q100 qualified | Qualified to Grade 0 (-40°C to +150°C junction), confirming robustness for automotive under-hood use |
Applications
| ADAS Domain Controller Power Supervision | Autonomous Driving SoC Monitoring |
|---|---|
Use Scenario: Real-time monitoring of multiple voltage rails powering vision processors, radar SoCs, and sensor fusion units in Level 3+ ADAS domain controllers. IC Role / Device Role / Timing Role: Centralized power-rail health monitor with programmable fault response and watchdog coordination. Use Value: Enables deterministic fault detection and system-level reset sequencing per ISO 26262 requirements without adding discrete supervisors. | Use Scenario: Supervising core, I/O, and auxiliary rails of high-performance autonomous driving SoCs (e.g., NVIDIA Orin, Qualcomm Ride) during boot and runtime. IC Role / Device Role / Timing Role: ASIL-B-compliant voltage monitor and windowed watchdog co-processor for SoC health assurance. Use Value: Reduces system-level validation burden by consolidating five rail monitors and watchdog into single AEC-Q100-qualified IC. |
| Remote Sensor Module Power Management | Automotive MCU Power System Supervision |
Use Scenario: Ensuring stable operation of distributed camera, LiDAR, or ultrasonic sensor modules connected via high-current cables to central power distribution units. IC Role / Device Role / Timing Role: Localized power integrity monitor with fast comparator response (5μs filter time) for rapid fault isolation. Use Value: Prevents false triggers from cable-induced ground bounce by enabling precise OV/UV thresholds with ±1% accuracy. | Use Scenario: Monitoring power rails of automotive-grade microcontrollers (e.g., Infineon TC3xx, NXP S32K) in body control modules, gateway ECUs, and chassis controllers. IC Role / Device Role / Timing Role: Integrated reset generator and watchdog manager with configurable timeout and fault mapping. Use Value: Eliminates need for separate reset IC and external watchdog, simplifying design and improving long-term reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar power-system monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX20481CATEA/VY+T | 6-channel variant with IN6P/INM differential pair; adds remote ground-sense capability for high-current rails | Required when supervising >5 rails or needing differential sensing for SoC core supplies with significant ground offset | Select MAX20481CATEA/VY+T only if sixth rail or differential monitoring is needed; otherwise MAX20481BATEA/VY+T provides optimal cost/performance balance |
| TLV809EADBZR | Single-channel 3.3V supervisor with fixed reset threshold; no watchdog, no programmability, no ASIL rating | Suitable only for non-safety-critical, single-rail applications with static voltage requirements | TLV809EADBZR cannot replace MAX20481BATEA/VY+T in ASIL-B systems or multi-rail supervision; use only in legacy or cost-sensitive non-automotive designs |
Compared with MAX20481CATEA/VY+T, the MAX20481BATEA/VY+T offers identical ASIL-B compliance, watchdog functionality, and operating temperature range but omits the sixth channel and differential sensing-reducing cost and complexity where five rails suffice. Unlike TLV809EADBZR, it delivers full programmability, multi-rail support, and automotive safety certification.
Availability
MAX20481BATEA/VY+T is available at Aetrix Electronics and suitable for ADAS domain controllers, autonomous driving SoC platforms, and automotive MCU power supervision requiring stable component supply, AEC-Q100 qualification, and ASIL-B compliance.
Supply support for MAX20481BATEA/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 semiconductors, serving automotive, industrial, communications, and healthcare markets.
The MAX20481 family is designed specifically for automotive power-system supervision, targeting ASIL-B functional safety requirements in ADAS, autonomous driving, and centralized ECU architectures.
FAQ
What is the channel configuration of the MAX20481BATEA/VY+T?
The MAX20481BATEA/VY+T is a 5-channel voltage monitor IC with single-ended inputs IN1 through IN5. It does not include the IN6P/IN7P differential inputs or INM remote sense pin found in higher-channel variants like MAX20481C/D. This configuration targets SoCs with up to five critical power rails while maintaining ASIL-B compliance and AEC-Q100 qualification.
Does the MAX20481BATEA/VY+T support differential voltage monitoring?
No, the MAX20481BATEA/VY+T does not support differential voltage monitoring. Its five inputs (IN1–IN5) are single-ended. Differential monitoring with remote ground sense (IN6P/IN7P + INM) is exclusive to the MAX20481C and MAX20481D variants. For applications requiring differential sensing of high-current SoC supplies, MAX20481CATEA/VY+T is the appropriate alternative.
What are the factory-programmable features of the MAX20481BATEA/VY+T?
The MAX20481BATEA/VY+T supports factory programming of OV/UV thresholds (±2.5% to ±10% in 0.5% steps), nominal voltage setpoints (0.5V–3.6875V for IN1–IN4; 0.5V–5.5V for IN5), RESET timeout duration (6μs/8ms/16ms/32ms), and fault mapping to the RESET pin. These settings are stored in one-time-programmable (OTP) memory with ECC protection and cannot be modified in the field.
How does the windowed watchdog in the MAX20481BATEA/VY+T operate?
The MAX20481BATEA/VY+T features a configurable windowed watchdog with independently adjustable closed and open windows (200μs–12.8ms/tick), an extended first-update window for SoC boot sequences, and active-high WDDIS disable control. A low-to-high transition on WDI refreshes the watchdog; violations during the closed window or outside the open window trigger fault responses, including optional dual-fault latching before asserting RESET.
Is the MAX20481BATEA/VY+T qualified for automotive applications?
Yes, the MAX20481BATEA/VY+T is AEC-Q100 qualified (Grade 0) and designed to meet ASIL-B reliability requirements in standalone operation. It operates across -40°C to +125°C ambient temperature, incorporates ECC-protected OTP memory, and includes built-in self-test (BIST) mapping for comparator fault detection-all validated for automotive power-system supervision in ADAS and autonomous driving systems.
MAX20481BATEA/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:
- 5
- Voltage - Threshold:
- 5 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)
MAX20481BATEA/VY+T FAQ
1.How can I place an order for MAX20481BATEA/VY+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20481BATEA/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 MAX20481BATEA/VY+T reliable?
The price and inventory of MAX20481BATEA/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 MAX20481BATEA/VY+T is usually 5 days.
3.What payment methods are accepted for MAX20481BATEA/VY+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20481BATEA/VY+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20481BATEA/VY+T?
MAX20481BATEA/VY+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20481BATEA/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 MAX20481BATEA/VY+T?
For technical support, including MAX20481BATEA/VY+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20481BATEA/VY+T requirements.
6.How does Aetrix verify that MAX20481BATEA/VY+T is sourced from the original manufacturer or authorized distributors?
All MAX20481BATEA/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 MAX20481BATEA/VY+T meets industry standards.
7.What is the process for return or replacement of MAX20481BATEA/VY+T?
All MAX20481BATEA/VY+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX20481BATEA/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 MAX20481BATEA/VY+T part is unused and in its original packaging.
Return procedure for MAX20481BATEA/VY+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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