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Maxim > Products > [Temperature Sensors] 
MAX6642
±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


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Data Sheet
FULL DATA SHEET (PDF, 156kB)
Download this datasheet in PDF formatDownload   Send this datasheet to any email addressE-Mail

Description
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.

Key Features   Applications/Uses
  • Dual Channel: Measures Remote and Local Temperature
  • +0.25°C Resolution
  • High Accuracy ±1°C (max) (Remote) and ±2°C (Local) from +60°C to +100°C
  • Measures Remote Temperature Up to +150°C
  • Programmable Overtemperature Alarm Temperature Thresholds
  • SMBus/I²C-Compatible Interface
  • Tiny TDFN Package

 
  		• Desktop Computers
  		• Graphic Cards
  		• Notebook Computers
  		• Servers
  		• Test and Measurement Equipment
  		• Thin Clients
  		• Workstations

    Key Specifications:   Temperature Sensors
    Part Number Sensor Type Alarm Output Functions Interface Remote Channels Accuracy (±°C) Parasite Power Temperature Threshold Temperature Resolution (Bits) Operating Temp. Range (°C) Smallest Available Package (max w/pins) (mm2) Price**
    MAX6642  Remote Alert
    •Remote & Local Sensor
    •Single Temperature Alarm
    		 2-Wire/I2C/SMBus Single 1 No Programmable 10 -40 to +125 10 $1.15 @ 1k
    See All Temperature Sensors (99)
    Notes:
    **This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

    Application Notes
  		• Application Note 1057: Compensating for Ideality Factor and Series Resistance Differences between Thermal Sense Diodes - MAX6642
  		• Application Note 3178: Extended-Range Temperature-Sensing ICs - MAX6642
  		• Application Note 3229: Selecting Temperature Sensors for System Measurement and Protection - MAX6642
  		• Application Note 3641: Migrating to the MAX6642 from Other Thermal Diode Temperature Sensors - MAX6642

    Evaluation Kits
  		• MAX6642EVCMOD2, MAX6642EVKIT

    Design Guides
  		• Temp Sensors (PDF)

    Reliability Reports
  		• Show FIT data for:
  		• Request Reliability Report for:

    Software/Models
    none

    Ordering Information
    Notes:

    1. Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
    2. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
    3. Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions.
    4. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.


    Devices: 1-28 of 28

    MAX6642 Free
    Sample    		 Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX6642ATT94+  
    		TDFN-EP;6 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0058 (PDF)
    Use pkgcode/variation: T633+2*
    		-40°C to +125°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX6642ATT94+T    
    		TDFN-EP;6 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0058 (PDF)
    Use pkgcode/variation: T633+2*
    		-40°C to +125°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX6642ATT92+  
    		TDFN-EP;6 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0058 (PDF)
    Use pkgcode/variation: T633+2*
    		-40°C to +125°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX6642ATT92    
    		TDFN-EP;6 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0058 (PDF)
    Use pkgcode/variation: T633-2*
    		-40°C to +125°C RoHS/Lead-Free: No
    Materials Analysis
    MAX6642ATT94    
    		TDFN-EP;6 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0058 (PDF)
    Use pkgcode/variation: T633-2*
    		-40°C to +125°C RoHS/Lead-Free: No
    Materials Analysis
    MAX6642ATT96    
    		TDFN-EP;6 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0058 (PDF)
    Use pkgcode/variation: T633-2*
    		-40°C to +125°C RoHS/Lead-Free: No
    Materials Analysis
    MAX6642ATT98+  
    		TDFN-EP;6 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0058 (PDF)
    Use pkgcode/variation: T633+2*
    		-40°C to +125°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX6642ATT98    
    		TDFN-EP;6 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0058 (PDF)
    Use pkgcode/variation: T633-2*
    		-40°C to +125°C RoHS/Lead-Free: No
    Materials Analysis
    MAX6642ATT9A    
    		TDFN-EP;6 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0058 (PDF)
    Use pkgcode/variation: T633-2*
    		-40°C to +125°C RoHS/Lead-Free: No
    Materials Analysis
    MAX6642ATT9C    
    		TDFN-EP;6 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0058 (PDF)
    Use pkgcode/variation: T633-2*
    		-40°C to +125°C RoHS/Lead-Free: No
    Materials Analysis
    MAX6642ATT9E    
    		TDFN-EP;6 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0058 (PDF)
    Use pkgcode/variation: T633-2*
    		-40°C to +125°C RoHS/Lead-Free: No
    Materials Analysis
    MAX6642YATT90+    
    		TDFN-EP;6 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0058 (PDF)
    Use pkgcode/variation: T633+2*
    		-40°C to +125°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX6642YATT98+    
    		TDFN-EP;6 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0058 (PDF)
    Use pkgcode/variation: T633+2*
    		-40°C to +125°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX6642ATT90    
    		TDFN-EP;6 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0058 (PDF)
    Use pkgcode/variation: T633-2*
    		-40°C to +125°C RoHS/Lead-Free: No
    Materials Analysis
    MAX6642ATT90+  
    		TDFN-EP;6 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0058 (PDF)
    Use pkgcode/variation: T633+2*
    		-40°C to +125°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX6642ATT92-T    
    		TDFN-EP;6 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0058 (PDF)
    Use pkgcode/variation: T633-2*
    		-40°C to +125°C RoHS/Lead-Free: No
    Materials Analysis
    MAX6642ATT94-T    
    		TDFN-EP;6 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0058 (PDF)
    Use pkgcode/variation: T633-2*
    		-40°C to +125°C RoHS/Lead-Free: No
    Materials Analysis
    MAX6642ATT96-T    
    		TDFN-EP;6 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0058 (PDF)
    Use pkgcode/variation: T633-2*
    		-40°C to +125°C RoHS/Lead-Free: No
    Materials Analysis
    MAX6642ATT98-T    
    		TDFN-EP;6 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0058 (PDF)
    Use pkgcode/variation: T633-2*
    		-40°C to +125°C RoHS/Lead-Free: No
    Materials Analysis
    MAX6642ATT9A-T    
    		TDFN-EP;6 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0058 (PDF)
    Use pkgcode/variation: T633-2*
    		-40°C to +125°C RoHS/Lead-Free: No
    Materials Analysis
    MAX6642ATT9C-T    
    		TDFN-EP;6 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0058 (PDF)
    Use pkgcode/variation: T633-2*
    		-40°C to +125°C RoHS/Lead-Free: No
    Materials Analysis
    MAX6642ATT9E-T    
    		TDFN-EP;6 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0058 (PDF)
    Use pkgcode/variation: T633-2*
    		-40°C to +125°C RoHS/Lead-Free: No
    Materials Analysis
    MAX6642ATT90+T    
    		TDFN-EP;6 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0058 (PDF)
    Use pkgcode/variation: T633+2*
    		-40°C to +125°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX6642ATT98+T    
    		TDFN-EP;6 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0058 (PDF)
    Use pkgcode/variation: T633+2*
    		-40°C to +125°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX6642ATT92+T    
    		TDFN-EP;6 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0058 (PDF)
    Use pkgcode/variation: T633+2*
    		-40°C to +125°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX6642YATT90+T    
    		TDFN-EP;6 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0058 (PDF)
    Use pkgcode/variation: T633+2*
    		-40°C to +125°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX6642YATT98+T    
    		TDFN-EP;6 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0058 (PDF)
    Use pkgcode/variation: T633+2*
    		-40°C to +125°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX6642ATT90-T    
    		TDFN-EP;6 pin;10 mm²
    Outline Drawing: 21-0137 (PDF)
    Land Pattern: 90-0058 (PDF)
    Use pkgcode/variation: T633-2*
    		-40°C to +125°C RoHS/Lead-Free: No
    Materials Analysis

    More Information
  		• Topmark Coding: MAX6642
  		• New Product Press Release 2003-08-06 

    Related Products
    MAX6648, MAX6692 Precision SMBus-Compatible Remote/Local Temperature Sensors with Overtemperature Alarms
    MAX6646, MAX6647, MAX6649 +145°C Precision SMBus-Compatible Remote/Local Sensors with Overtemperature Alarms

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    Document Ref.: 19-2920; Rev 1; 2008-12-03
    This page last modified: 2008-12-03


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