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Analog Devices Inc./Maxim Integrated MAX6683AUB+
- Part No.:
- MAX6683AUB+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Thermal Management
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX6683AUB+.pdf
- Description:
- IC TEMP SENSOR MON 10-UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:346
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Product details
Overview
MAX6683AUB+ from Maxim Integrated is a system supervisor IC that monitors three external supply voltages (1.8V, 2.5V, 5V), its own VCC (3.3V), and local die temperature via integrated 8-bit voltage ADC and 11-bit temperature ADC. It features SMBus/I²C-compatible 2-wire interface, latched ALERT output, and programmable thresholds for thermal and power-fault detection in server motherboard management.
For engineers reviewing the MAX6683AUB+ datasheet, MAX6683AUB+ pinout, MAX6683AUB+ application, or MAX6683AUB+ equivalent, key selection considerations include its 10-pin µMAX package, -40°C to +125°C operating range, 60Hz/50Hz line-frequency rejection, ±4°C temperature accuracy over 0–125°C, and support for SMBus alert response addressing in multi-device fault-detection systems.
Technical Context
The MAX6683AUB+ integrates a precision bandgap temperature sensor and four-channel analog multiplexer feeding a single successive-approximation ADC with 66ms internal conversion timing synchronized to 60Hz (or 50Hz via Configuration Register bit 4). Voltage inputs are scaled by on-chip resistive dividers to map nominal 1.8V/2.5V/5V/VCC to 192 LSB (3/4 scale) of the 8-bit ADC full-scale range.
Its SMBus/I²C interface supports Write Byte, Read Byte, Read Word, Send Byte, and Receive Byte protocols; the ADD pin selects one of four slave addresses (0x28–0x2B), and the device responds to the standard SMBus alert response address (0x18) for rapid fault identification in shared-interrupt bus topologies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.7V to +5.5V - supports direct connection to 3.3V or 5V system rails without level-shifting. |
| Operating Temperature | -40°C to +125°C - qualified for industrial and server-grade thermal environments. |
| Temperature Accuracy | ±4°C (0°C to +125°C) - enables reliable thermal throttling and fan control in compute platforms. |
| Voltage Monitoring Channels | 4 inputs: 1.8VIN, 2.5VIN, 5VIN, VCC - covers core logic, memory, and I/O rail supervision in modern computing hardware. |
| ADC Resolution | 8-bit (voltage), 11-bit (temperature) - provides 0.125°C resolution for precise thermal margining. |
| Interrupt Modes | Default, one-time, comparator - allows flexible fault-handling strategies without host firmware polling. |
| Line-Frequency Rejection | 60Hz or 50Hz - suppresses AC mains noise during ADC integration, improving measurement stability. |
Pinout & Package
Package: 10-pin µMAX (3mm × 3mm, 0.5mm pitch, exposed pad), RoHS-compliant, thermal performance optimized with GND-connected N.C. pin (Pin 4).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1.8VIN (Pin 1) | Analog input | Monitors 1.8V nominal supply; internally scaled to 3/4 of ADC full-scale (192 LSB) at nominal voltage. |
| 2.5VIN (Pin 2) | Analog input | Monitors 2.5V nominal supply; same scaling and LSB weight (13mV) as 1.8VIN path. |
| 5VIN (Pin 3) | Analog input | Monitors 5V nominal supply; full-scale range mapped to 255 LSB with 26mV/LSB resolution. |
| N.C. (Pin 4) | No-connect | Not internally connected; recommended tied to GND to enhance thermal conduction from exposed pad. |
| GND (Pin 5) | Ground reference | Common return for all analog and digital circuitry; must be low-impedance for ADC accuracy. |
| ALERT (Pin 6) | Open-drain interrupt | Active-low latched output asserted on voltage/temperature threshold violation; wire-OR compatible. |
| ADD (Pin 7) | Address select | Sets 2 LSBs of SMBus slave address (GND=00, VCC=01, SDA=10, SCL=11) for multi-device bus sharing. |
| SDA (Pin 8) | I²C/SMBus data | Bi-directional open-drain serial data line; requires external pull-up; supports standard SMBus protocols. |
| SCL (Pin 9) | I²C/SMBus clock | Input-only clock line; max 400kHz frequency; timing compliant with SMBus v1.1 specifications. |
| VCC (Pin 10) | Power supply | +2.7V to +5.5V supply input; also monitored as fourth voltage channel; bypass with 0.1µF capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable thresholds | All voltage high/low limits and temperature hot limit/hysteresis stored in nonvolatile registers (e.g., THOT default = +80°C, THYST = +65°C). |
| SMBus alert response | Responds to broadcast address 0x18 to self-identify on shared ALERT lines-enables fast root-cause isolation in multi-sensor systems. |
| Low-power shutdown | 10µA shutdown current (ISD) with I²C interface retained-allows remote wake-up and configuration without full power-up. |
| Line-noise immunity | 66ms ADC integration period matches integer multiples of 60Hz/50Hz mains cycles-rejects >99% of supply-coupled noise. |
| Flexible temperature resolution | Configurable 9-bit (0.5°C/LSB) or 11-bit (0.125°C/LSB) mode via Configuration Register bit 5-trades speed for precision. |
Applications
| Server Motherboard Thermal Management | Workstation Power-Rail Supervision |
|---|---|
Use Scenario: Real-time monitoring of CPU VRM output, memory VDDQ, and chipset VCCIO rails alongside die temperature on dual-socket server boards. IC Role / Device Role / Timing Role: System supervisor providing autonomous voltage/fault detection and latched ALERT signaling to BMC via SMBus. Use Value: Enables immediate thermal throttling or graceful shutdown before silicon damage occurs, using factory-programmed thresholds and hysteresis. | Use Scenario: Continuous supervision of 1.8V GPU core, 2.5V PCIe switch, and 5V peripheral rails in high-end CAD/CAM workstations. IC Role / Device Role / Timing Role: Fault-detection node reporting out-of-spec conditions to host microcontroller over shared SMBus bus. Use Value: Eliminates need for discrete comparators and reduces BOM count while supporting dynamic threshold updates during runtime. |
| Telecom Line Card Monitoring | Network Switch ASIC Thermal Protection |
Use Scenario: Compact monitoring of DSP supply rails and ambient board temperature in space-constrained telecom line cards. IC Role / Device Role / Timing Role: Local sensor interfacing directly to baseband processor's I²C port for real-time health telemetry. Use Value: Provides deterministic 200–300ms total monitoring cycle time (including temp + 4 voltage conversions) for timely fault response. | Use Scenario: Die-temperature tracking and VCC supervision for multi-gigabit Ethernet switch ASICs operating at up to 125°C junction. IC Role / Device Role / Timing Role: Embedded thermal guardrail enforcing +125°C max operating limit with comparator-mode ALERT persistence. Use Value: Prevents ASIC thermal runaway by holding ALERT active until temperature falls below THOT-no host polling required. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar system monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM92CIMX/NOPB | Single-channel temperature sensor only; no voltage monitoring; 12-bit resolution; SPI interface only. | Lacks multi-rail supervision capability; suitable only for pure thermal monitoring roles. | Select when only high-accuracy local temperature sensing is needed and voltage monitoring is handled elsewhere. |
| ADM1027ARUZ | 6-voltage-channel supervisor; 10-bit temp sensor; supports PWM fan control; larger 24-pin TSSOP package. | Higher channel count and integrated fan control, but no SMBus alert response address support. | Choose for complex multi-rail systems requiring fan speed regulation and broader voltage coverage. |
Compared with LM92CIMX/NOPB and ADM1027ARUZ, the MAX6683AUB+ uniquely balances compact 10-pin footprint, integrated 4-channel voltage + temperature supervision, and SMBus alert response-making it optimal for space-constrained server and telecom applications where fast fault identification and minimal BOM overhead are critical.
Availability
MAX6683AUB+ is available at Aetrix Electronics and suitable for server motherboard design, telecom line card development, and network switch thermal management requiring stable component supply across extended industrial temperature ranges.
Supply support for MAX6683AUB+ 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) designs precision analog, mixed-signal, and power management ICs for demanding industrial, computing, and communications applications.
The MAX6683AUB+ belongs to Maxim's system-level monitoring product line, engineered specifically for intelligent power and thermal supervision in high-reliability computing infrastructure where deterministic fault response and bus-efficient communication are essential.
FAQ
What is the default temperature threshold setting for MAX6683AUB+ at power-on?
The MAX6683AUB+ powers up with hot temperature limit (THOT) register (address 39h) set to 01010000 binary (+80°C) and hot temperature hysteresis (THYST) register (address 3Ah) set to 01000001 binary (+65°C). These values are factory-programmed and define the initial thermal alarm window before any host writes to the registers.
How does the MAX6683AUB+ handle multiple devices sharing the same ALERT line?
The MAX6683AUB+ supports SMBus alert response protocol: when ALERT is asserted, the host broadcasts receive byte command to address 0x18, and each asserting device places its unique slave address on the bus. Bus arbitration ensures only the lowest-addressed device responds, enabling sequential identification of all fault sources without additional hardware.
Can the MAX6683AUB+ monitor voltages higher than 6V?
No-the MAX6683AUB+ absolute maximum rating for all analog inputs is +6.0V. Voltages exceeding 6V must be attenuated externally using a precision resistive divider to ensure the scaled input remains within the 0–VCC range and avoids damage or measurement error.
What is the purpose of the N.C. pin (Pin 4) on the MAX6683AUB+?
Pin 4 is a no-connect terminal not bonded internally. Maxim recommends connecting it to GND to improve thermal conductivity from the exposed pad to the PCB ground plane-reducing junction-to-board thermal resistance and enhancing long-term reliability under sustained thermal load.
Does the MAX6683AUB+ support both SMBus and I²C protocols interchangeably?
Yes-the MAX6683AUB+ implements full compatibility with standard SMBus v1.1 protocols (Write Byte, Read Byte, Read Word, Send Byte, Receive Byte) and basic I²C functionality. It accepts standard I²C start/stop conditions and acknowledges its 7-bit address, but does not support I²C-specific features like clock stretching or 10-bit addressing.
MAX6683AUB+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Temp Monitoring System (Sensor)
- Sensor Type:
- Internal
- Sensing Temperature:
- -40°C ~ 125°C
- Accuracy:
- ±3°C(Max)
- Topology:
- ADC, Multiplexer, Register Bank
- Output Type:
- I2C/SMBus
- Output Alarm:
- Yes
- Output Fan:
- No
- Voltage - Supply:
- 2.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-uMAX/uSOP
MAX6683AUB+ FAQ
1.How can I place an order for MAX6683AUB+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6683AUB+ 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 MAX6683AUB+ reliable?
The price and inventory of MAX6683AUB+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6683AUB+ is usually 5 days.
3.What payment methods are accepted for MAX6683AUB+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6683AUB+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6683AUB+?
MAX6683AUB+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6683AUB+ 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 MAX6683AUB+?
For technical support, including MAX6683AUB+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6683AUB+ requirements.
6.How does Aetrix verify that MAX6683AUB+ is sourced from the original manufacturer or authorized distributors?
All MAX6683AUB+ 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 MAX6683AUB+ meets industry standards.
7.What is the process for return or replacement of MAX6683AUB+?
All MAX6683AUB+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6683AUB+, 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 MAX6683AUB+ part is unused and in its original packaging.
Return procedure for MAX6683AUB+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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