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Analog Devices Inc./Maxim Integrated MAX20478BATBE/VY+
- Part No.:
- MAX20478BATBE/VY+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
MAX20478BATBE/VY+.pdf
- Description:
- MAX20478BATBE/VY+
- Quantity:
- Payment:
- Shipping:
Inventory:2,697
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Product details
Overview
MAX20478BATBE/VY+ from Analog Devices is a fully integrated ASIL D-compliant automotive voltage monitor SoC with three configurable voltage inputs (IN1–IN3), programmable windowed watchdog, and dual reset outputs (RESET1/RESET2). It supports 0.5V–3.6875V monitoring on IN1/IN2 (12.5mV steps) and 0.5V–5.6V on IN3 (20mV steps), ±0.8% threshold accuracy, and operates from -40°C to +125°C. Used in ADAS power supervision and SoC health monitoring.
For engineers reviewing the MAX20478BATBE/VY+ datasheet, MAX20478BATBE/VY+ pinout, MAX20478BATBE/VY+ application, or MAX20478BATBE/VY+ equivalent, key selection criteria include ASIL D compliance, triple-input voltage monitoring resolution, windowed watchdog timing flexibility, OTP-configurable thresholds, and AEC-Q100 Grade 0 qualification for under-hood automotive use.
Technical Context
The MAX20478BATBE/VY+ implements a digitally configurable analog monitoring architecture with on-chip reference (VREF), internal oscillator, and error-correcting OTP for permanent configuration storage. Its three independent input channels support simultaneous OV/UV detection with selectable 2.5%–10% hysteresis windows and ±0.8% absolute accuracy over temperature.
Watchdog functionality uses a windowed timeout scheme with programmable WDI response window and WDDIS disable control. RESET1 and RESET2 are independently programmable open-drain outputs with active-low assertion, supporting system-level fault recovery sequencing in safety-critical microcontroller supervision.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.35V to 5.50V - Enables direct connection to 3.3V or 5V automotive rails without external regulation. |
| Input Voltage Range (IN1/IN2) | 0.5V to 3.6875V in 12.5mV steps - Supports precise monitoring of core logic, I/O, or sensor supply voltages. |
| Input Voltage Range (IN3) | 0.5V to 5.6V in 20mV steps - Covers higher-voltage analog supplies, CAN transceivers, or camera power rails. |
| OV/UV Threshold Accuracy | ±0.8% - Ensures reliable fault detection across -40°C to +125°C without calibration drift compensation. |
| Operating Current | 125µA - Minimizes quiescent load on always-on battery domains in vehicle ECU sleep modes. |
| Watchdog Type | Programmable windowed watchdog - Prevents false resets during transient noise while detecting stuck or stalled firmware execution. |
| Temperature Range | -40°C to +125°C - Qualified for engine bay and ADAS domain controller mounting locations. |
Pinout & Package
Package: 10-pin side-wettable TDFN (3mm × 3mm) with exposed thermal pad - supports automated optical inspection (AOI) and improves solder joint reliability for automotive reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Accepts 2.35V–5.50V main supply; decoupling required per layout guidelines. |
| GND | Ground reference | Common return path for analog and digital sections; connects to exposed pad. |
| IN1, IN2, IN3 | Monitor input channels | High-impedance analog inputs; each independently configurable for OV/UV thresholds. |
| RESET1, RESET2 | Open-drain reset outputs | Active-low, independently programmable reset signals for MCU or peripheral recovery sequencing. |
| WDI | Watchdog input | Asynchronous strobe input; failure to toggle within programmed window asserts RESET outputs. |
| VREF | Internal reference output | Stable 1.25V reference available for external circuit biasing or ADC reference sharing. |
| WDDIS | Watchdog disable control | Active-high digital input to temporarily suspend watchdog function during safe debug or boot phases. |
Key Features
| Feature | Design Value |
|---|---|
| ASIL D compliance | Fully certified per ISO 26262 for use in safety-critical ADAS and autonomous driving systems without additional hardware redundancy. |
| Triple-input monitoring | Simultaneous supervision of primary MCU core, I/O, and auxiliary rail (e.g., camera or radar supply) with independent thresholds. |
| Windowed watchdog | Prevents both early and late watchdog timeouts-critical for deterministic real-time OS and safety firmware execution. |
| OTP with ECC | One-time-programmable configuration memory with error-correcting code ensures immutable, tamper-resistant setup of thresholds and reset behavior. |
| AEC-Q100 Grade 0 | Qualified for operation up to +125°C ambient-meets requirements for under-hood ECUs and domain controllers. |
Applications
| ADAS Power Supervision | Autonomous Driving SoC Monitoring |
|---|---|
Use Scenario: Real-time monitoring of multiple voltage rails powering camera, radar, and fusion processors in Level 2+ ADAS ECUs. IC Role / Device Role / Timing Role: Voltage monitor SoC providing independent OV/UV detection and synchronized reset signaling to prevent silent data corruption. Use Value: Eliminates need for discrete comparators and timers; reduces BOM count by ≥4 components while maintaining ASIL D integrity. | Use Scenario: Health supervision of heterogeneous compute platforms (e.g., NVIDIA Orin, TI Jacinto) where core, memory, and I/O supplies must be validated before boot. IC Role / Device Role / Timing Role: Triple-input supervisor with windowed watchdog ensuring deterministic startup sequence and runtime fault containment. Use Value: Enables single-chip validation of up to three critical rails with <±0.8% accuracy-meeting functional safety requirements without external calibration. |
| Remote Sensor Module Power Control | Automotive Microcontroller Reset Management |
Use Scenario: Compact, low-power voltage supervision for distributed sensors (e.g., ultrasonic parking, tire pressure) operating on 12V-to-3.3V converted rails. IC Role / Device Role / Timing Role: Low-quiescent (125µA) monitor enabling always-on supervision without draining battery during vehicle sleep. Use Value: Reduces standby current vs. discrete solutions by >60%, extending module operational life in cold-cranking conditions. | Use Scenario: Coordinated reset generation for multi-core MCUs (e.g., Infineon TC3xx, NXP S32K3) requiring staggered or conditional reset assertion. IC Role / Device Role / Timing Role: Dual independent open-drain RESET outputs with programmable delay and polarity for flexible system-level recovery. Use Value: Replaces two separate reset ICs and simplifies PCB routing-reducing layer count and improving signal integrity in dense automotive layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive voltage monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV809E33DBVR | Single-channel, fixed 3.3V UV detector; no OV, no watchdog, no OTP, no ASIL rating. | Suitable only for basic undervoltage detection in non-safety-critical modules. | Select only when supervising one rail without safety or watchdog requirements. |
| MAX22026ATP+ | Dual-channel, ±1% accuracy, no windowed watchdog, no OTP, AEC-Q100 Grade 1 (–40°C to +125°C). | Lacks ASIL D certification and triple-input capability; limited to simpler MCU supervision. | Choose for cost-sensitive, non-ASIL designs needing dual-rail monitoring without advanced watchdog features. |
Compared with TLV809E33DBVR and MAX22026ATP+, the MAX20478BATBE/VY+ uniquely delivers ASIL D compliance, triple-input flexibility, windowed watchdog, and OTP configuration in a single 3mm × 3mm package-enabling consolidation of safety-critical supervision functions without compromising diagnostic coverage or thermal robustness.
Availability
MAX20478BATBE/VY+ is available at Aetrix Electronics and suitable for advanced driver-assistance systems, autonomous driving processing units, and remote sensor modules requiring stable component supply across extended automotive temperature ranges and long production lifecycles.
Supply support for MAX20478BATBE/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.
The MAX20478 product line delivers ASIL D-certified, highly integrated power-supply monitors for next-generation automotive ECUs-designed specifically to reduce system complexity and improve functional safety compliance in ADAS and autonomous platforms.
FAQ
What is the ASIL D compliance status of the MAX20478BATBE/VY+?
The MAX20478BATBE/VY+ is fully compliant with ISO 26262 ASIL D requirements, including documentation, FMEDA, and diagnostic coverage reports provided by Analog Devices. This certification covers its triple-input voltage monitoring, windowed watchdog, and dual reset outputs-making it suitable for safety-critical ADAS and autonomous driving applications without requiring redundant hardware.
How many voltage inputs does the MAX20478BATBE/VY+ support, and what are their ranges?
The MAX20478BATBE/VY+ supports three voltage inputs: IN1 and IN2 monitor 0.5V–3.6875V in 12.5mV steps, while IN3 monitors 0.5V–5.6V in 20mV steps. All inputs feature independently programmable OV/UV thresholds with ±0.8% accuracy and 2.5%–10% hysteresis-enabling precise, multi-rail supervision in automotive SoCs and ECUs.
Does the MAX20478BATBE/VY+ include a watchdog timer, and what type is it?
Yes, the MAX20478BATBE/VY+ includes a programmable windowed watchdog. Unlike standard timeout watchdogs, this implementation requires the WDI signal to toggle within a defined lower and upper time boundary-detecting both firmware hangs and premature resets caused by noise or timing jitter, which is essential for deterministic safety-critical software execution.
What package type and dimensions does the MAX20478BATBE/VY+ use?
The MAX20478BATBE/VY+ uses a 10-pin side-wettable TDFN package measuring 3mm × 3mm with an exposed thermal pad. This package supports automated optical inspection (AOI) and enhances solder joint reliability under automotive thermal cycling, meeting AEC-Q100 Grade 0 requirements for operation from -40°C to +125°C ambient.
Can the MAX20478BATBE/VY+ be configured after manufacturing, or is it one-time programmable?
The MAX20478BATBE/VY+ uses one-time programmable (OTP) memory with error-correcting code (ECC) for configuration storage. Thresholds, reset behaviors, watchdog parameters, and other settings are permanently written during final test-ensuring immutable, tamper-resistant operation throughout the device's lifetime without risk of field corruption or accidental reprogramming.
MAX20478BATBE/VY+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 10-WFDFN Exposed Pad
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- -
- Type:
- Monitor
- Number of Voltages Monitored:
- 3
- Voltage - Threshold:
- Adjustable/Selectable
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 10-TDFN (3x3)
MAX20478BATBE/VY+ FAQ
1.How can I place an order for MAX20478BATBE/VY+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20478BATBE/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 MAX20478BATBE/VY+ reliable?
The price and inventory of MAX20478BATBE/VY+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20478BATBE/VY+ is usually 5 days.
3.What payment methods are accepted for MAX20478BATBE/VY+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20478BATBE/VY+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20478BATBE/VY+?
MAX20478BATBE/VY+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20478BATBE/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 MAX20478BATBE/VY+?
For technical support, including MAX20478BATBE/VY+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20478BATBE/VY+ requirements.
6.How does Aetrix verify that MAX20478BATBE/VY+ is sourced from the original manufacturer or authorized distributors?
All MAX20478BATBE/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 MAX20478BATBE/VY+ meets industry standards.
7.What is the process for return or replacement of MAX20478BATBE/VY+?
All MAX20478BATBE/VY+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20478BATBE/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 MAX20478BATBE/VY+ part is unused and in its original packaging.
Return procedure for MAX20478BATBE/VY+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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