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Analog Devices Inc./Maxim Integrated MAX42500ATEDA+
- Part No.:
- MAX42500ATEDA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
MAX42500ATEDA+.pdf
- Description:
- FOUR-TO-SEVEN INPUT, HIGH ACCURA
- Quantity:
- Payment:
- Shipping:
Inventory:3,561
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Product details
Overview
MAX42500ATEDA+ from Analog Devices is a SIL 3-certified system-on-chip power system monitor with seven voltage monitoring inputs (five single-ended, two differential with remote ground sense), programmable OV/UV thresholds (±1.3% accuracy over –40°C to +125°C), flexible power sequence recorder (FPSR), and challenge/response windowed watchdog-all accessible via I²C. It serves as a centralized safety-critical supervisory IC in industrial power rails and SoC supply monitoring.
For engineers reviewing the MAX42500ATEDA+ datasheet, MAX42500ATEDA+ pinout, MAX42500ATEDA+ application, or MAX42500ATEDA+ equivalent, key selection considerations include IEC 61508 SIL 3 certification, differential DVS tracking capability on IN6P/IN7P, programmable FPSR timestamp resolution (25–3200 µs/tick), and CRC-protected I²C interface with PEC support.
Technical Context
The MAX42500ATEDA+ integrates three core subsystems: a 7-channel voltage monitor (with factory-trimmed ±1.3% OV/UV accuracy across full temperature range), a flexible power sequence recorder triggered by EN0/EN1 level transitions, and a configurable challenge/response windowed watchdog featuring extended first-update window for MCU boot sequences.
Its I²C interface operates up to 1.1 MHz with programmable 7-bit address (0x28–0x2B), CRC-8 packet error checking (SMBus 3.0), and no clock stretching. The differential monitors IN6P/IN7P share INM for remote ground sensing and support dynamic voltage scaling via independent OV/UV setpoints referenced to INM.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.35V to 5.50V - supports direct connection to common industrial rail voltages without external regulators. |
| Operating Current | 150 µA typical - enables low-power continuous supervision in always-on systems. |
| Power-Down Current | 8 µA - allows deep sleep mode during system standby while retaining configuration. |
| OV/UV Threshold Accuracy | ±1.3% (–40°C to +125°C) - ensures reliable fault detection under extreme industrial ambient conditions. |
| I²C Clock Frequency | Up to 1.1 MHz - enables fast register access and real-time fault response in time-critical applications. |
| FPSR Timestamp Resolution | 25 µs to 3200 µs per tick - configurable timing granularity for precise power-up/down sequence validation. |
| Watchdog First-Update Window | Configurable extension - accommodates variable-length MCU boot sequences before requiring first refresh. |
Pinout & Package
MAX42500ATEDA+ is housed in a 16-pin TQFN package (3mm × 3mm, exposed pad), optimized for thermal performance (θJA = 44.5°C/W) and high-density industrial PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN1–IN4 | Single-ended voltage monitor inputs | Monitor fixed-rail supplies (0.5V–3.6875V); each supports independent ±2.5% to ±10% OV/UV thresholds. |
| IN5 | Extended-range single-ended input | Supports 0.5V–5.5V rails (e.g., 5V logic or analog supplies) with same OV/UV programmability. |
| IN6P / IN7P | Differential voltage monitor inputs | Track dynamically scaled SoC cores; require INM reference for remote ground sensing to reject ground bounce. |
| INM | Common negative input | Shared reference for IN6P/IN7P; must be routed separately to point near monitored rail for accurate DVS tracking. |
| EN0 / EN1 | Enable state transition inputs | Trigger FPSR recording on rising/falling edges-EN0 for ON/OFF, EN1 for SLEEP/ON (configurable). |
| RESET | Open-drain fault output | Asserts low on any monitored fault; programmable mapping to specific input channels or combined events. |
| ADDR | I²C address select | Sets LSBs of 7-bit address (0x28–0x2B) via GND/VDD tie-off or 100kΩ resistor. |
| SDA / SCL | I²C bidirectional data/clock | Support SMBus 3.0 features including PEC; require external pull-ups (>500Ω) for open-drain operation. |
Key Features
| Feature | Design Value |
|---|---|
| IEC 61508 SIL 3 certification | Validated for safety-critical industrial functions up to SIL 3, enabling use in functional safety architectures without additional hardware redundancy. |
| Differential DVS monitoring (IN6P/IN7P) | Enables continuous voltage supervision during processor core voltage ramping-no blind spots during dynamic scaling transitions. |
| Flexible Power Sequence Recorder (FPSR) | Records separate timestamps for power-up and power-down events on enabled rails, with user-selectable tick rate and automatic flagging of missed sequences. |
| Challenge/response watchdog | Uses LFSR-based key derivation (x⁸+x⁶+x⁵+x⁴+1) to prevent spurious or malicious watchdog resets-critical for secure MCU supervision. |
| CRC-8 packet error checking (PEC) | Provides end-to-end integrity verification on I²C reads/writes, detecting bit errors caused by EMI in noisy industrial environments. |
Applications
| Industrial Process Control | Robotics |
|---|---|
Use Scenario: Monitoring multi-rail PLC power supplies (24V, 5V, 3.3V, 1.8V) with synchronized sequencing and fault logging. IC Role / Device Role / Timing Role: Centralized power supervisor enforcing SIL 3-compliant startup/shutdown order and capturing timestamped rail failures. Use Value: Eliminates discrete supervisors and timers, reducing BOM count by >70% while meeting IEC 61508 diagnostic coverage requirements. | Use Scenario: Supervising motor drive inverters and vision SoCs with dynamic core voltage scaling during motion profiles. IC Role / Device Role / Timing Role: Real-time DVS-aware voltage monitor on IN6P/IN7P, paired with FPSR to validate safe power sequencing across joint control modules. Use Value: Prevents undervoltage lockout during rapid torque changes by maintaining continuous rail monitoring through voltage ramps. |
| Remote Sensor Modules | Microcontroller Unit (MCU)/SoC Monitoring |
Use Scenario: Long-life battery-powered environmental sensors deployed in unattended field locations. IC Role / Device Role / Timing Role: Ultra-low-power (8 µA) supervisor enabling wake-on-fault, with CRC-protected I²C for reliable configuration over noisy RS-485 links. Use Value: Extends battery life beyond 10 years while ensuring tamper-resistant fault reporting via PEC-verified telemetry. | Use Scenario: Securing boot integrity of ARM Cortex-M7-based industrial gateways running real-time OS. IC Role / Device Role / Timing Role: Challenge/response watchdog with extended first-update window, validating MCU firmware execution post-reset. Use Value: Detects stalled or corrupted boot code before application layer initialization-preventing unsafe system entry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar power system monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX16050ATL+ | 5-input, non-SIL-certified, no FPSR or DVS support; ±1.5% threshold accuracy at +85°C only. | Limited to non-safety-rated systems; cannot replace MAX42500ATEDA+ in SIL 3 designs or DVS scenarios. | Select only for cost-sensitive, non-certified applications where sequencing and differential monitoring are unnecessary. |
| TPS389033DSER | 3-input, no I²C, no programmable thresholds; fixed 3.3V UV/OV detection with 200ms reset timeout. | Basic reset generator only-lacks voltage monitoring flexibility, sequencing, or watchdog functionality. | Use only as simple power-on reset IC; not a functional alternative for system-level supervision. |
Compared with MAX16050ATL+ and TPS389033DSER, the MAX42500ATEDA+ uniquely delivers SIL 3 certification, seven-channel programmable monitoring with DVS support, FPSR-based sequence validation, and challenge/response watchdog-making it the sole option for integrated, safety-compliant industrial power supervision.
Availability
MAX42500ATEDA+ is available at Aetrix Electronics and suitable for industrial process control, robotics, and remote sensor module designs requiring stable component supply, long-term lifecycle assurance, and certified functional safety compliance.
Supply support for MAX42500ATEDA+ 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 industrial, automotive, communications, and healthcare markets.
The MAX42500 family was designed specifically for SIL 3-certified power supervision in harsh industrial environments-integrating voltage monitoring, sequencing, and watchdog functions into a single robust SoC.
FAQ
What safety certifications does the MAX42500ATEDA+ hold?
The MAX42500ATEDA+ is IEC 61508 SIL 3 certified, with documentation and failure-in-time (FIT) data provided in the official Analog Devices safety manual. This certification covers the entire device functionality-including voltage monitoring, FPSR, watchdog, and I²C interface-enabling its use in safety instrumented systems (SIS) up to SIL 3. No external components are required to achieve this rating, as all diagnostics and redundancy are implemented on-die within the MAX42500ATEDA+.
How does the MAX42500ATEDA+ support dynamic voltage scaling (DVS)?
The MAX42500ATEDA+ supports DVS exclusively through its two differential inputs IN6P and IN7P, which share the INM remote ground-sense pin. Unlike single-ended inputs, these channels allow independent programming of OV and UV thresholds relative to INM-enabling continuous monitoring during voltage ramps. The MAX42500ATEDA+ provides documented I²C command sequences (low-to-high and high-to-low) to reconfigure thresholds in sync with power supply commands, preventing false faults during transitions.
What is the function of the FPSR in the MAX42500ATEDA+?
The Flexible Power Sequence Recorder (FPSR) in the MAX42500ATEDA+ captures timestamped power-up and power-down events for all enabled voltage monitors, triggered by transitions on EN0 (mandatory) and optionally EN1. It records 8-bit timestamps with user-configurable resolution (25–3200 µs/tick), stores separate sequences for up/down events, and flags anomalies like overlapping sequences. Data remains latched until manually cleared, allowing host MCUs to retrieve validated sequencing history via I²C after fault analysis.
Can the MAX42500ATEDA+ watchdog operate without I²C communication?
No-the MAX42500ATEDA+ watchdog requires I²C interaction for initialization, configuration, and refresh. Even in simple windowed mode, the WDKEY register must be written to reset the timer; in challenge/response mode, the host must read the key, compute the LFSR response, and write it back. There is no autonomous or pin-triggered watchdog reset mechanism-the I²C interface is mandatory for all watchdog operations in the MAX42500ATEDA+.
What are the absolute maximum ratings for the INM pin on the MAX42500ATEDA+?
The INM pin on the MAX42500ATEDA+ has an absolute maximum rating of –0.3V to +0.3V relative to GND. Exceeding this range risks damage to the internal differential comparators for IN6P and IN7P. In practice, INM should be connected to a clean local ground reference near the monitored rail's return path-not to the main system ground plane-to maintain accuracy during high-current transients. This specification is explicitly defined in the Absolute Maximum Ratings table of the MAX42500ATEDA+ datasheet.
MAX42500ATEDA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-WFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- -
- Type:
- Power Supply Monitor
- Number of Voltages Monitored:
- 7
- Voltage - Threshold:
- Adjustable/Selectable
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TQFN (3x3)
MAX42500ATEDA+ FAQ
1.How can I place an order for MAX42500ATEDA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX42500ATEDA+ 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 MAX42500ATEDA+ reliable?
The price and inventory of MAX42500ATEDA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX42500ATEDA+ is usually 5 days.
3.What payment methods are accepted for MAX42500ATEDA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX42500ATEDA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX42500ATEDA+?
MAX42500ATEDA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX42500ATEDA+ 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 MAX42500ATEDA+?
For technical support, including MAX42500ATEDA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX42500ATEDA+ requirements.
6.How does Aetrix verify that MAX42500ATEDA+ is sourced from the original manufacturer or authorized distributors?
All MAX42500ATEDA+ 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 MAX42500ATEDA+ meets industry standards.
7.What is the process for return or replacement of MAX42500ATEDA+?
All MAX42500ATEDA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX42500ATEDA+, 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 MAX42500ATEDA+ part is unused and in its original packaging.
Return procedure for MAX42500ATEDA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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