Maxim > Products > Sensors > MAX6657, MAX6658, MAX6659
Maxim > Products > Thermal Management > MAX6657, MAX6658, MAX6659

MAX6657, MAX6658, MAX6659

±1°C, SMBus-Compatible Remote/Local Temperature Sensors with Overtemperature Alarms

Overview

Technical Documents

Ordering Info

Status

Active: In Production.

Description

The MAX6657/MAX6658/MAX6659 are precise, two-channel digital temperature sensors. Each accurately measures the temperature of its own die and one remote PN junction, and reports the temperature in digital form on a 2-wire serial interface. The remote junction can be a diode-connected transistor like the low-cost NPN type 2N3904 or 2N3906 PNP type. The remote junction can also be a common-collector PNP, such as a substrate PNP of a microprocessor.

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 MAX6657/MAX6658/MAX6659 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 temperature is represented in extended mode as 10 bits + sign with a resolution of 0.125°C. When the conversion rate is faster than 4Hz, output data is 7 bits + sign with a resolution of 1°C. The MAX6657/MAX6658/MAX6659 also include an SMBus timeout feature to enhance system reliability.

Remote accuracy is ±1°C between +60°C and +100°C with no calibration needed. The MAX6657 measures temperatures from 0°C to +125°C and the MAX6658/MAX6659 from -55°C to +125°C. The MAX6659 has the added benefit of being able to select one of three addresses through an address pin, and a second over-temperature alarm pin for greater system reliability.

Data Sheet

Download	Rev 5	(PDF, 172kB)
E-Mail

Key Features

Dual Channel Measures Remote and Local Temperature
11-Bit, +0.125°C Resolution
High Accuracy ±1°C (max) from +60°C to +100°C (Remote)
No Calibration Required
Programmable Under/Overtemperature Alarms
Programmable Conversion Rate (0.0625Hz to 16Hz)
SMBus/I²C*-Compatible Interface
Two Alarm Outputs: active-low ALERT and active-low OVERT1 (MAX6657 and MAX6658)
Three Alarm Outputs: active-low ALERT, active-low OVERT1, and active-low OVERT2 (MAX6659)
Compatible with 65nm Process Technology(Y Versions)

Applications/Uses

Computers: Desktop, Workstation, Server
Notebook Computers
Servers
Workstations

Key Specifications:

Temperature Sensors

Part Number

Sensor Type

Alarm Output

Functions

Interface

Remote Chan.

Accuracy
(±°C)

Parasite Pwr.

Temp. Thresh.

Temp. Resolution
(bits)

Oper. Temp.
(°C)

Smallest Available Pckg.
(mm²)

Budgetary Price

max w/pins

See Notes

MAX6657

Remote

Alert

Overt

Remote & Local Sensor

2-Wire/I²C/SMBus

Single

Programmable

-55 to +125

30.9

$1.89 @1k

MAX6658

$1.96 @1k

MAX6659

$2.25 @1k

See All Temperature Sensors (103)

Pricing 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.

Diagram

Typical Operating Circuit

Application Notes

Application Note 1057		Compensating for Ideality Factor and Series Resistance Differences between Thermal-Sense Diodes
Application Note 3502		Effect of PC Board Trace Width on Remote-Diode Temperature-Sensor Accuracy
Tutorial 4679		Thermal Management Handbook

Product Guides

Thermal Management (PDF)

Reliability Reports

Reliability Report:	MAX6657.pdf MAX6658.pdf MAX6659.pdf
Show FIT data for:

Software/Models

none

Ordering Information

Filters:

Part Number:

Package:

Temperature:

Tape and Reel

Sample

Part Number	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX6657MSA			Active	SOIC(N);8 pin;30.9 mm² Outline Drawing:21-0041 (PDF) Land Pattern: 90-0096 (PDF) Use pkgcode/variation: S8-5*	-55°C to +125°C	RoHS/Lead-Free: No Materials Analysis
MAX6657MSA+			Active	SOIC(N);8 pin;30.9 mm² Outline Drawing:21-0041 (PDF) Land Pattern: 90-0096 (PDF) Use pkgcode/variation: S8+5*	-55°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX6657MSA+T			Active	SOIC(N);8 pin;30.9 mm² Outline Drawing:21-0041 (PDF) Land Pattern: 90-0096 (PDF) Use pkgcode/variation: S8+5*	-55°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX6657MSA-T			Active	N.SO;8 pin Land Pattern: Not Available	-55°C to +125°C	See data sheet
MAX6657YMSA+			Active	SOIC(N);8 pin;30.9 mm² Outline Drawing:21-0041 (PDF) Land Pattern: 90-0096 (PDF) Use pkgcode/variation: S8+5*	-55°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX6657YMSA+T			Active	SOIC(N);8 pin;30.9 mm² Outline Drawing:21-0041 (PDF) Land Pattern: 90-0096 (PDF) Use pkgcode/variation: S8+5*	-55°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX6658MSA			Active	SOIC(N);8 pin;30.9 mm² Outline Drawing:21-0041 (PDF) Land Pattern: 90-0096 (PDF) Use pkgcode/variation: S8-5*	-55°C to +125°C	RoHS/Lead-Free: No Materials Analysis
MAX6658MSA+			Active	SOIC(N);8 pin;30.9 mm² Outline Drawing:21-0041 (PDF) Land Pattern: 90-0096 (PDF) Use pkgcode/variation: S8+5*	-55°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX6658MSA+T			Active	SOIC(N);8 pin;30.9 mm² Outline Drawing:21-0041 (PDF) Land Pattern: 90-0096 (PDF) Use pkgcode/variation: S8+5*	-55°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX6658MSA-T			Active	SOIC(N);8 pin;30.9 mm² Outline Drawing:21-0041 (PDF) Land Pattern: 90-0096 (PDF) Use pkgcode/variation: S8-5*	-55°C to +125°C	RoHS/Lead-Free: No Materials Analysis
Part Number	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX6659MEE			Active	QSOP;16 pin;30.9 mm² Outline Drawing:21-0055 (PDF) Land Pattern: 90-0167 (PDF) Use pkgcode/variation: E16-5*	-55°C to +125°C	RoHS/Lead-Free: No Materials Analysis
MAX6659MEE+			Active	QSOP;16 pin;30.9 mm² Outline Drawing:21-0055 (PDF) Land Pattern: 90-0167 (PDF) Use pkgcode/variation: E16+5*	-55°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX6659MEE+T			Active	QSOP;16 pin;30.9 mm² Outline Drawing:21-0055 (PDF) Land Pattern: 90-0167 (PDF) Use pkgcode/variation: E16+5*	-55°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX6659MEE-T			Active	QSOP;16 pin Land Pattern: Not Available	-55°C to +125°C	See data sheet

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; -D = drypack; -U/+U on DS parts = cut tape. More: See Full Data Sheet or Maxim Product 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.

Similar Products by Function

MAX1617	Remote/Local Temperature Sensor with SMBus Serial Interface
MAX6654	1°C Accurate Remote/Local Temperature Sensor with SMBus Serial Interface
See All Temperature Sensors (109 Products)

Similar Products by Application

Computers: Desktops and Workstations > Thermal Management

More Information

New Product Press Release	[ 2001-09-10 ]
Temperature Family by Product Type

Didn't Find What You Need?

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

Information Index

Overview		Technical Documents		Ordering Info		Related Products
Description Key Features Applications/Uses Key Specifications Diagram Notes and Comments		Data Sheet Application Notes Evaluation Kits Product Guides Reliability Reports Software/Models		Price and Availability Samples Buy Online Package Information Lead-Free Information		Similar Products by Function Similar Products by Application Evaluation Kits Products with Similar Part Numbers Products Used With This

Document Ref.: 19-2034 Rev 5; 2010-10-26
This page last modified: 2010-10-26