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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Supervisors

Analog Devices Inc./Maxim Integrated MAX16031ETM+

Name: MAX16031ETM+
Brand: Analog Devices Inc./Maxim Integrated
SKU: MAX16031ETM+
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MAX16031ETM+

Manufacturer:: Analog Devices Inc./Maxim Integrated

Category:: Supervisors

Package:: 48-WFQFN Exposed Pad

Datasheet:: MAX16031ETM+.pdf

Description:: IC SUPERVISOR 8 CHANNEL 48TQFN

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Product details

Overview

MAX16031ETM+ from Maxim Integrated is an EEPROM-configurable system monitor IC with integrated 10-bit ADC, designed to concurrently monitor up to eight supply voltages, three temperatures (one internal + two remote diodes), and one high-side current channel in server and storage power systems. It features nonvolatile fault memory, dual overvoltage/undervoltage thresholds per voltage channel, two overtemperature thresholds, and a dedicated overcurrent output - all configurable via SMBus or JTAG.

For engineers reviewing the MAX16031ETM+ datasheet, MAX16031ETM+ pinout, MAX16031ETM+ application, or MAX16031ETM+ equivalent, this page delivers verified electrical specs, validated 48-pin TQFN package mapping, confirmed fault output behavior, and real-world sequencing use cases - enabling rapid integration into complex multi-rail power architectures without design iteration.

Technical Context

The MAX16031ETM+ implements a multiplexed 10-bit SAR ADC architecture with programmable input ranges (1.36mV–5.46mV LSB) and ±0.9% FSR total unadjusted error across –40°C to +85°C. Its analog front-end includes independent current-sense amplifier (CS+/CS−), dual remote diode interfaces (DXP1/DXN1, DXP2/DXN2), and internal temperature sensor with ±3°C accuracy.

Digital control is executed via dual serial interfaces: SMBus/I²C-compatible (400kHz, timeout-enabled) and IEEE 1149.1 JTAG (TCK/TDI/TDO/TMS), both accessing the same register map and EEPROM configuration space. Fault logic supports independent assertion on OVERT, OVERC, ALERT, FAULT1, FAULT2, and RESET outputs based on user-defined threshold dependencies stored in nonvolatile memory.

Key Specifications

Parameter	Value and Actual Design Meaning
ADC Resolution	10-bit SAR with ±1 LSB INL/DNL - enables precise margining of 1.8V, 3.3V, 5V, 12V rails within ±1% full-scale error.
Voltage Monitoring Channels	8 single-ended/pseudo-differential inputs (IN1–IN8) - supports simultaneous tracking of CPU core, memory, I/O, and auxiliary supplies.
Temperature Sensing	1 internal + 2 external diode channels - monitors SoC junction, VRM heatsink, and storage controller die temperature with 0.5°C resolution.
Current Sense	High-side differential input (CS+/CS−), 6–48× gain selectable, 29–232mV input range - detects overcurrent on 12V bus or 5V standby rail with <5µs propagation delay.
Supply Range	2.85V to 14V VCC - powers directly from system 3.3V AUX or 12V main bus without external regulator.
Fault Memory	Nonvolatile EEPROM stores fault registers (INx, temp, current values at event time) - enables post-shutdown root-cause analysis without host intervention.
Interface Support	SMBus 2.0 + JTAG - allows in-system configuration during development (JTAG) and runtime monitoring/reconfiguration (SMBus).

Pinout & Package

MAX16031ETM+ is housed in a 7mm × 7mm, 48-pin TQFN-EP package with exposed pad (EP) connected internally to GND. Thermal performance is optimized for high-density server PCB layouts with ≤2.78mW/°C derating above +70°C ambient.

Pin/Terminal	Circuit Role	Design Meaning
IN1–IN8	ADC analog inputs	Eight configurable supply monitor inputs; each supports single-ended or pseudo-differential mode with programmable range (1.36–5.46mV LSB).
DXP1/DXN1, DXP2/DXN2	Remote diode interfaces	Two independent 2-wire remote temperature sensing channels; drive 84µA/6µA diode bias current with 14:1 ratio for accurate ΔV_BE measurement.
CS+/CS−	High-side current sense inputs	Differential inputs for shunt-based current monitoring; support 3V–28V common-mode range and 6–48× programmable gain.
ALERT, OVERT, OVERC, FAULT1, FAULT2, RESET	Open-drain fault outputs	Individually configurable active-low outputs; OVERT asserts on internal/remote overtemperature; OVERC (MAX16031 only) asserts on primary current threshold breach.
SDA/SCL, A0/A1	SMBus interface	I²C-compatible 400kHz bus with address selection (A0/A1); includes bus timeout and ALERT interrupt signaling per SMBus 2.0 spec.
TCK/TDI/TMS/TDO	JTAG test interface	IEEE 1149.1-compliant boundary-scan and debug interface; enables factory programming and in-circuit configuration without SMBus dependency.
GPIO1/GPIO2	Configurable I/O	Programmable as inputs (e.g., manual reset trigger) or outputs (e.g., sequencing enable signals) with pull-up/down control.

Key Features

Feature	Design Value
EEPROM-configurable thresholds	Independent upper/lower limits per monitored parameter stored in nonvolatile memory - eliminates need for external configuration EEPROM or firmware updates.
Nonvolatile fault capture	Automatic snapshot of ADC register values (voltages, temps, current) into EEPROM on major fault - enables deterministic failure diagnostics without host logging.
Dual fault output flexibility	FAULT1/FAULT2 can be assigned to any combination of voltage, temperature, or current faults - supports custom alert prioritization and redundancy schemes.
High-side current sense with fast shutdown	OVERC output asserts within 5µs of exceeding VCSTH - enables immediate power-path disable before MOSFET thermal runaway in 12V distribution networks.
Multi-interface accessibility	Full register and EEPROM access via SMBus or JTAG - permits pre-boot configuration (JTAG) and runtime health polling (SMBus) in the same hardware.

Applications

Server Power Sequencing	Storage Controller Health Monitoring
Use Scenario: Coordinating power-up sequence of CPU, memory, and PCIe switch rails in dual-socket servers. IC Role / Device Role / Timing Role: System monitor IC that validates voltage stability on IN1–IN8 before asserting GPIO1 to enable downstream regulators. Use Value: Prevents boot failures by enforcing strict 100µs window between 1.8V core ramp completion and 3.3V I/O enable - using ADC cycle time of 80–100µs per full 8-channel scan.	Use Scenario: Real-time thermal and current supervision of NVMe SSD controller and DRAM buffer in enterprise storage arrays. IC Role / Device Role / Timing Role: Temperature sensor and current monitor that triggers OVERT on >85°C junction and OVERC on >15A buffer current. Use Value: Enables predictive throttling via SMBus-read temperature trends and immediate shutdown on overcurrent - leveraging ±3°C internal sensor accuracy and <5µs OVERC response.
Telecom Line Card Voltage Margining	Workstation GPU Power Integrity
Use Scenario: Margining ±3% on 12V, 5V, and 3.3V supplies during production test of 40Gbps line cards. IC Role / Device Role / Timing Role: Precision ADC-based monitor that compares INx readings against EEPROM-stored golden limits during burn-in. Use Value: Achieves 1% absolute voltage measurement accuracy across –40°C to +85°C - eliminating need for external calibration during final test.	Use Scenario: Detecting transient overcurrent events on GPU 12V rail caused by sudden compute load spikes. IC Role / Device Role / Timing Role: High-speed current monitor with CS+/CS− inputs and dedicated OVERC output tied to GPU reset controller. Use Value: Triggers hardware reset within 5µs of 200mV shunt voltage exceedance - preventing GPU VRM damage before thermal sensors respond.

Server Power Sequencing

Storage Controller Health Monitoring

Use Scenario: Coordinating power-up sequence of CPU, memory, and PCIe switch rails in dual-socket servers.

IC Role / Device Role / Timing Role: System monitor IC that validates voltage stability on IN1–IN8 before asserting GPIO1 to enable downstream regulators.

Use Value: Prevents boot failures by enforcing strict 100µs window between 1.8V core ramp completion and 3.3V I/O enable - using ADC cycle time of 80–100µs per full 8-channel scan.

Use Scenario: Real-time thermal and current supervision of NVMe SSD controller and DRAM buffer in enterprise storage arrays.

IC Role / Device Role / Timing Role: Temperature sensor and current monitor that triggers OVERT on >85°C junction and OVERC on >15A buffer current.

Use Value: Enables predictive throttling via SMBus-read temperature trends and immediate shutdown on overcurrent - leveraging ±3°C internal sensor accuracy and <5µs OVERC response.

Telecom Line Card Voltage Margining

Workstation GPU Power Integrity

Use Scenario: Margining ±3% on 12V, 5V, and 3.3V supplies during production test of 40Gbps line cards.

IC Role / Device Role / Timing Role: Precision ADC-based monitor that compares INx readings against EEPROM-stored golden limits during burn-in.

Use Value: Achieves 1% absolute voltage measurement accuracy across –40°C to +85°C - eliminating need for external calibration during final test.

Use Scenario: Detecting transient overcurrent events on GPU 12V rail caused by sudden compute load spikes.

IC Role / Device Role / Timing Role: High-speed current monitor with CS+/CS− inputs and dedicated OVERC output tied to GPU reset controller.

Use Value: Triggers hardware reset within 5µs of 200mV shunt voltage exceedance - preventing GPU VRM damage before thermal sensors respond.

Equivalent & Alternatives

The following parts are listed as comparable options for similar system monitoring applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MAX16032ETM+	Monitors 6 voltages + 2 temperatures (1 internal/1 remote); no CS+/CS− or DXP2/DXN2 pins; identical 48-pin TQFN package and SMBus/JTAG interface.	Targeted at simpler systems (e.g., single-CPU workstations) where 8-voltage monitoring and dual remote diodes are unnecessary.	Select MAX16032ETM+ when cost optimization is critical and full MAX16031ETM+ feature set is unused - shares footprint and software API.
LM95245CIMM/NOPB	2-channel remote diode sensor + 15-bit delta-sigma ADC; no voltage monitoring, no current sense, no EEPROM config; 10-pin WSON package.	Specialized for thermal-only monitoring in space-constrained embedded designs - lacks system-level voltage/current supervision capability.	Choose LM95245CIMM/NOPB only for pure thermal management; cannot replace MAX16031ETM+ in multi-parameter monitoring roles.

Compared with MAX16032ETM+, the MAX16031ETM+ adds two voltage inputs, second remote diode interface, and high-side current sensing - making it uniquely suited for full-featured server BMC integration. Unlike LM95245CIMM/NOPB, it provides complete power-supply health visibility in a single IC with nonvolatile fault logging.

Availability

MAX16031ETM+ is available at Aetrix Electronics and suitable for server motherboard design, enterprise storage controller qualification, and telecom line card production requiring stable component supply and long-term lifecycle assurance.

Supply support for MAX16031ETM+ 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

Maxim Integrated (now part of Analog Devices) is a leader in precision analog, mixed-signal, and power management ICs, serving datacenter, industrial, and communications markets with high-reliability solutions.

The MAX16031ETM+ belongs to Maxim's EEPROM-configurable system monitor product line, engineered specifically for fault-resilient power supervision in multi-rail computing platforms where deterministic diagnostics and in-field reconfiguration are mandatory.

FAQ

What is the primary function of the MAX16031ETM+ in a server power architecture?

The MAX16031ETM+ serves as a centralized system monitor IC that concurrently measures eight supply voltages, three temperatures, and one high-side current channel - comparing each against EEPROM-configurable thresholds and asserting dedicated fault outputs (OVERT, OVERC, ALERT) to notify the baseboard management controller. Its nonvolatile fault memory captures ADC register values at the moment of failure, enabling post-event root-cause analysis without host involvement. This makes MAX16031ETM+ essential for achieving ASHRAE-compliant thermal management and IEC 62368-1 fault containment in 2U/4U rack servers.

Does the MAX16031ETM+ support both SMBus and JTAG interfaces simultaneously?

No - the MAX16031ETM+ supports SMBus and JTAG as mutually exclusive serial interfaces; only one may be active at a time. Both interfaces access the identical register map and EEPROM configuration space, but they use separate physical pins (SDA/SCL/A0/A1 vs. TCK/TDI/TMS/TDO) and distinct protocol stacks. JTAG is typically used during manufacturing programming and debug, while SMBus handles runtime monitoring and dynamic threshold adjustment. The MAX16031ETM+ does not arbitrate between them - external system design must ensure only one interface drives the device at any given time.

What is the accuracy and response time of the overcurrent detection in MAX16031ETM+?

The MAX16031ETM+ achieves overcurrent detection with <5µs propagation delay from VSENSE exceeding VCSTH, and its current-sense ADC delivers ±10% accuracy at 10mV input rising to ±0.2% at 150mV (A=6 gain). The primary overcurrent threshold (VCSTH) is programmable from 29mV to 232mV depending on gain setting (6×–48×), and secondary timeout (r5Ch[1:0]) can be configured from 50µs to 70.4ms to filter transients. This enables reliable protection of 12V distribution networks against short-circuit faults while ignoring benign inrush currents - a capability confirmed in MAX16031ETM+ characterization data across –40°C to +85°C.

How does the MAX16031ETM+ handle remote temperature sensing with two diodes?

The MAX16031ETM+ integrates two independent remote diode interfaces (DXP1/DXN1 and DXP2/DXN2), each driving 84µA high-side and 6µA low-side bias current with a precise 14:1 ratio to measure ΔV_BE across external PNP transistors. It achieves ±5°C accuracy over –40°C to +125°C remote diode range with 0.5°C resolution and includes automatic open/short detection (register 0x50). The second diode channel (DXP2/DXN2) is exclusive to MAX16031ETM+ - absent in MAX16032ETM+ - allowing simultaneous monitoring of CPU socket and VRM MOSFET temperature in dual-processor servers, directly supported by the MAX16031ETM+ functional diagram and pinout.

Can the MAX16031ETM+ operate without external configuration after initial setup?

Yes - the MAX16031ETM+ stores all configuration (thresholds, channel enables, fault dependencies, GPIO modes) in on-chip EEPROM, allowing fully autonomous operation after power-on. Its power-on delay is 4ms, and it begins sampling IN1–IN8, temperature sensors, and current sense immediately thereafter. No host processor or external memory is required for basic fault detection; ALERT, OVERT, and OVERC outputs assert independently based on EEPROM-loaded rules. This self-contained behavior is intrinsic to MAX16031ETM+ architecture and verified in its "Getting Started" section and functional diagram - making it ideal for fail-safe power supervision in headless server BMC implementations.

MAX16031ETM+ Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc./Maxim Integrated

Series:: -

Package/Case:: 48-WFQFN Exposed Pad

Packaging:: Tube

Product Status:: Active

Programmable:: Not Verified

Type:: Multi-Voltage Supervisor

Number of Voltages Monitored:: 8

Voltage - Threshold:: 8 Selectable Threshold Combinations

Output:: Open Drain or Open Collector

Reset:: Active Low

Reset Timeout:: Adjustable/Selectable

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 48-TQFN (7x7)

MAX16031ETM+ FAQ

1.How can I place an order for MAX16031ETM+ through Aetrix?

Please submit a Request for Quotation (RFQ) for MAX16031ETM+ 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 MAX16031ETM+ reliable?

The price and inventory of MAX16031ETM+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16031ETM+ is usually 5 days.

3.What payment methods are accepted for MAX16031ETM+?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16031ETM+ transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MAX16031ETM+?

MAX16031ETM+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MAX16031ETM+ 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 MAX16031ETM+?

For technical support, including MAX16031ETM+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16031ETM+ requirements.

6.How does Aetrix verify that MAX16031ETM+ is sourced from the original manufacturer or authorized distributors?

All MAX16031ETM+ 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 MAX16031ETM+ meets industry standards.

7.What is the process for return or replacement of MAX16031ETM+?

All MAX16031ETM+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX16031ETM+, 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 MAX16031ETM+ part is unused and in its original packaging.

Return procedure for MAX16031ETM+:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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