QuickView

Technical Documents

Ordering Info

More Information

User Comments (0)

All

Status

Active: In Production.

Data Sheet

FULL DATA SHEET (PDF, 248kB) Download   E-Mail

Description

The MAX6680/MAX6681 are precise, two-channel digital thermometers. Each accurately measures the temperature of its own die and one remote PN junction and reports the temperature on a 2-wire serial interface. The remote junction can be a diode-connected transistor like the low-cost NPN type 2N3904 or PNP type 2N3906. The remote junction can also be a common-collector PNP, such as a substrate PNP of a microprocessor. The MAX6680/MAX6681 include pin-programmable default temperature thresholds for the active-low OVERT output, which provides fail-safe clock throttling or system shutdown. In addition, the devices are pin programmable to select whether the active-low OVERT output responds to either the local, remote, or both temperatures. The 2-wire serial interface accepts standard System Management Bus (SMBus™) commands such as Write Byte, Read Byte, Send Byte, and Receive Byte to read the temperature data and program the alarm thresholds and conversion rate. The MAX6680/MAX6681 can function autonomously with a programmable conversion rate, which allows the control of supply current and temperature update rate to match system needs. For conversion rates of 4Hz or less, the remote sensor temperature can be represented in extended mode as 10 bits + sign with a resolution of 0.125°C. When the conversion rate is 8Hz, output data is 7 bits + sign with a resolution of 1°C. The MAX6680/MAX6681 also include an SMBus timeout feature to enhance system reliability. The MAX6681 is an upgrade to the MAX6654. The MAX6680/MAX6681 remote accuracy is ±1°C with no calibration needed. They are available in a 16-pin QSOP package and operate throughout the -55°C to +125°C temperature range.

An evaluation kit is available:  MAX6681EVKIT  

Key Features		Applications/Uses
Two Alarm Outputs: Active-Low ALERT and Active-Low OVERT Pin-Programmable Threshold for Active-Low OVERT Limit Programmable Under/Overtemperature Active-Low ALERT Limit Dual Channel: Measures Remote and Local Temperature 11-Bit, 0.125°C Resolution for Remote Temperature Measurements High Accuracy ±1°C (max) from +60°C to +100°C (Remote) No Calibration Required SMBus/I²C-Compatible Interface SMBus Timeout Prevents SMBus Lockup		Desktop Computers Notebook Computers Servers Thin Clients Workstations

Diagram

Typical Operating Circuit

Application Notes

Application Note 1057: Compensating for Ideality Factor and Series Resistance Differences between Thermal Sense Diodes - MAX6680, MAX6681

Evaluation Kits

MAX6681EVKIT

Design Guides

Thermal Management (PDF)

Reliability Reports

Show FIT data for: MAX6680 MAX6681 Request Reliability Report for: MAX6680 MAX6681

Software/Models

none

Ordering Information

Notes: Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day. Part number suffixes: T or T&R = tape and reel;+ = RoHS/lead-free;# = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions. * 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: 1-9 of 9

MAX6680	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX6680MEE+			Active	QSOP;16 pin;30.9 mm² Outline Drawing: 21-0055 (PDF) Land Pattern: 90-0167 (PDF) Use pkgcode/variation: E16+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX6680MEE+T			Active	QSOP;16 pin;30.9 mm² Outline Drawing: 21-0055 (PDF) Land Pattern: 90-0167 (PDF) Use pkgcode/variation: E16+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX6680MEE			Active	QSOP;16 pin;30.9 mm² Outline Drawing: 21-0055 (PDF) Land Pattern: 90-0167 (PDF) Use pkgcode/variation: E16-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX6680MEE-T			Active	Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX6681	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX6681EVSYS			Active	Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX6681MEE+			Active	QSOP;16 pin;30.9 mm² Outline Drawing: 21-0055 (PDF) Land Pattern: 90-0167 (PDF) Use pkgcode/variation: E16+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX6681MEE			Active	QSOP;16 pin;30.9 mm² Outline Drawing: 21-0055 (PDF) Land Pattern: 90-0167 (PDF) Use pkgcode/variation: E16-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX6681MEE-T			Active	QSOP;16 pin;30.9 mm² Outline Drawing: 21-0055 (PDF) Land Pattern: 90-0167 (PDF) Use pkgcode/variation: E16-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX6681MEE+T			Active	QSOP;16 pin;30.9 mm² Outline Drawing: 21-0055 (PDF) Land Pattern: 90-0167 (PDF) Use pkgcode/variation: E16+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis

More Information

New Product Press Release 2002-05-17  Temperature Family by Product Type

Related Products

MAX6654 1°C Accurate Remote/Local Temperature Sensor with SMBus Serial Interface MAX6690 2°C Accurate Remote/Local Temperature Sensor with SMBus Serial Interface More Like This: View Product Families for Similar Products See All Temperature Sensors (99 Products)

Didn't Find What You Need?

Next Day Product Selection Assistance from Applications Engineers Parametric Search Applications Help

QuickView

Technical Documents

Ordering Info

More Information

Description   Key Features   Applications/Uses   Key Specifications   Diagram

Data Sheet   Application Notes   Design Guides   Engineering Journals   Reliability Reports   Software/Models   Evaluation Kits

Price and Availability   Samples   Buy Online   Package Information   Lead-Free Information

Related Products   Notes and Comments   Evaluation Kits