MAX6642
PRODUCTION±1°C, SMBus-Compatible Remote/Local Temperature Sensor with Overtemperature Alarm
Industry's Smallest ±1°C, SMBus-Compatible Remote/Local Temperature Sensor with Overtemperature Alarm
- Part Models
- 8
- 1ku List Price
- Starting From $1.71
Overview
- Integrated Temperature Sensor Enables Simultaneous Dual Temperature (Remote and Local) Measurements
- Remote Accuracy ±1°C
- Local Accuracy ±2°C from +60°C to +100°C
- Measures Remote Temperature up to +150°C
- 0.25°C Resolution
- Dual Zone Monitoring Automates Over-Temperature Alarms
- Programmable Remote/Local Temperature Thresholds
- ALERT Output
- Small Footprint
- 3mm x 3mm TDFN Package with Exposed Pad
- Low Thermal Mass Reduces Measurement Latency
- SMBus/I2C Address Hardwired
The MAX6642 precise, two-channel digital temperature sensor accurately measures the temperature of its own die and a remote PN junction and reports the temperature data over a 2-wire serial interface. The remote PN junction is typically a substrate PNP transistor on the die of a CPU, ASIC, GPU, or FPGA. The remote PN junction can also be a discrete diode-connected small-signal transistor.
The 2-wire serial interface accepts standard system management bus (SMBus™), Write Byte, Read Byte, Send Byte, and Receive Byte commands to read the temperature data and to program the alarm thresholds. To enhance system reliability, the MAX6642 includes an SMBus timeout. The temperature data format is 10 bits with the least significant bit (LSB) corresponding to +0.25°C. The active-low ALERT output asserts when the local or remote overtemperature thresholds are violated. A fault queue can be used to prevent the active-low ALERT output from setting until two consecutive faults have been detected.
Measurements can be done autonomously or in a single-shot mode.
Remote accuracy is ±1°C maximum error between +60°C and +100°C. The MAX6642 operates from -40°C to +125°C, and measures remote temperatures between 0°C and +150°C. The MAX6642 is available in a 6-pin TDFN package with an exposed pad.
Applications
- Desktop Computers
- Graphic Cards
- Notebook Computers
- Servers
- Test and Measurement Equipment
- Thin Clients
- Workstations
Documentation
Data Sheet 1
Reliability Data 1
Design Note 4
Technical Articles 4
Device Drivers 1
3rd Party Solutions 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| MAX6642ATT90+ | Thin Dual Flatpack No Leads, Exposed Pad | ||
| MAX6642ATT90+T | Thin Dual Flatpack No Leads, Exposed Pad | ||
| MAX6642ATT92+ | Thin Dual Flatpack No Leads, Exposed Pad | ||
| MAX6642ATT92+T | Thin Dual Flatpack No Leads, Exposed Pad | ||
| MAX6642ATT94+ | Thin Dual Flatpack No Leads, Exposed Pad | ||
| MAX6642ATT94+T | Thin Dual Flatpack No Leads, Exposed Pad | ||
| MAX6642ATT98+ | Thin Dual Flatpack No Leads, Exposed Pad | ||
| MAX6642ATT98+T | Thin Dual Flatpack No Leads, Exposed Pad |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Aug 2, 2025 - 2505 PIN/ERRATA |
||
| MAX6642ATT90+ | PRODUCTION | |
| MAX6642ATT92+ | PRODUCTION | |
| MAX6642ATT94+ | PRODUCTION | |
| MAX6642ATT98+ | PRODUCTION | |
|
Jun 20, 2016 - 1612 ASSEMBLY |
||
| MAX6642ATT90+ | PRODUCTION | |
| MAX6642ATT90+T | PRODUCTION | |
| MAX6642ATT92+ | PRODUCTION | |
| MAX6642ATT92+T | PRODUCTION | |
| MAX6642ATT94+ | PRODUCTION | |
| MAX6642ATT94+T | PRODUCTION | |
| MAX6642ATT98+ | PRODUCTION | |
| MAX6642ATT98+T | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Device Drivers 1
Evaluation Software 0
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Hardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Analog to Digital Converters (ADCs) 5 | ||
| MAX6646 | PRODUCTION | +145°C Precision SMBus-Compatible Remote/Local Sensors with Overtemperature Alarms |
| MAX6647 | PRODUCTION | +145°C Precision SMBus-Compatible Remote/Local Sensors with Overtemperature Alarms |
| MAX6648 | PRODUCTION | Precision SMBus-Compatible Remote/Local Temperature Sensors with Overtemperature Alarms |
| MAX6649 | PRODUCTION | +145°C Precision SMBus-Compatible Remote/Local Sensors with Overtemperature Alarms |
| MAX6692 | PRODUCTION | Precision SMBus-Compatible Remote/Local Temperature Sensors with Overtemperature Alarms |
Tools & Simulations
Software Development 1
Evaluation Kits
Evaluation System/Evaluation Kit for the MAX6642
Evaluation System/Evaluation Kit for the MAX6642
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