MAX6642 ±1°C, SMBus-Compatible Remote/Local Temperature Sensor with Overtemperature Alarm

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)

Price^**

MAX6642

Remote

Alert

•	Remote & Local Sensor

•	Single Temperature Alarm

2-Wire/SMBus

Single

Programmable

$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.

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: 1-28 of 28

MAX6642

Free
Sample

Buy

Package:	TYPE PINS FOOTPRINT
	DRAWING CODE/VAR *

Temp

RoHS/Lead-Free?
Materials Analysis

MAX6642ATT94+

TDFN;6 pin;
Dwg: 21-0137 (PDF)
Use pkgcode/variation: T633+2*

-40°C to +125°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX6642ATT94+T

TDFN;6 pin;
Dwg: 21-0137 (PDF)
Use pkgcode/variation: T633+2*

-40°C to +125°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX6642ATT92+

TDFN;6 pin;
Dwg: 21-0137 (PDF)
Use pkgcode/variation: T633+2*

-40°C to +125°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX6642ATT92

THIN QFN (Dual);6 pin;
Dwg: 21-0137 (PDF)
Use pkgcode/variation: T633-2*

-40°C to +125°C

RoHS/Lead-Free: No
Materials Analysis

MAX6642ATT94

THIN QFN (Dual);6 pin;
Dwg: 21-0137 (PDF)
Use pkgcode/variation: T633-2*

-40°C to +125°C

RoHS/Lead-Free: No
Materials Analysis

MAX6642ATT96

THIN QFN (Dual);6 pin;
Dwg: 21-0137 (PDF)
Use pkgcode/variation: T633-2*

-40°C to +125°C

RoHS/Lead-Free: No
Materials Analysis

MAX6642ATT98+

TDFN;6 pin;
Dwg: 21-0137 (PDF)
Use pkgcode/variation: T633+2*

-40°C to +125°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX6642ATT98

THIN QFN (Dual);6 pin;
Dwg: 21-0137 (PDF)
Use pkgcode/variation: T633-2*

-40°C to +125°C

RoHS/Lead-Free: No
Materials Analysis

MAX6642ATT9A

THIN QFN (Dual);6 pin;
Dwg: 21-0137 (PDF)
Use pkgcode/variation: T633-2*

-40°C to +125°C

RoHS/Lead-Free: No
Materials Analysis

MAX6642ATT9C

THIN QFN (Dual);6 pin;
Dwg: 21-0137 (PDF)
Use pkgcode/variation: T633-2*

-40°C to +125°C

RoHS/Lead-Free: No
Materials Analysis

MAX6642ATT9E

THIN QFN (Dual);6 pin;
Dwg: 21-0137 (PDF)
Use pkgcode/variation: T633-2*

-40°C to +125°C

RoHS/Lead-Free: No
Materials Analysis

MAX6642YATT90+

TDFN;6 pin;
Dwg: 21-0137 (PDF)
Use pkgcode/variation: T633+2*

-40°C to +125°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX6642YATT98+

TDFN;6 pin;
Dwg: 21-0137 (PDF)
Use pkgcode/variation: T633+2*

-40°C to +125°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX6642ATT90

THIN QFN (Dual);6 pin;
Dwg: 21-0137 (PDF)
Use pkgcode/variation: T633-2*

-40°C to +125°C

RoHS/Lead-Free: No
Materials Analysis

MAX6642ATT90+

TDFN;6 pin;
Dwg: 21-0137 (PDF)
Use pkgcode/variation: T633+2*

-40°C to +125°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX6642ATT92-T

THIN QFN (Dual);6 pin;
Dwg: 21-0137 (PDF)
Use pkgcode/variation: T633-2*

-40°C to +125°C

RoHS/Lead-Free: No
Materials Analysis

MAX6642ATT94-T

THIN QFN (Dual);6 pin;
Dwg: 21-0137 (PDF)
Use pkgcode/variation: T633-2*

-40°C to +125°C

RoHS/Lead-Free: No
Materials Analysis

MAX6642ATT96-T

THIN QFN (Dual);6 pin;
Dwg: 21-0137 (PDF)
Use pkgcode/variation: T633-2*

-40°C to +125°C

RoHS/Lead-Free: No
Materials Analysis

MAX6642ATT98-T

THIN QFN (Dual);6 pin;
Dwg: 21-0137 (PDF)
Use pkgcode/variation: T633-2*

-40°C to +125°C

RoHS/Lead-Free: No
Materials Analysis

MAX6642ATT9A-T

THIN QFN (Dual);6 pin;
Dwg: 21-0137 (PDF)
Use pkgcode/variation: T633-2*

-40°C to +125°C

RoHS/Lead-Free: No
Materials Analysis

MAX6642ATT9C-T

THIN QFN (Dual);6 pin;
Dwg: 21-0137 (PDF)
Use pkgcode/variation: T633-2*

-40°C to +125°C

RoHS/Lead-Free: No
Materials Analysis

MAX6642ATT9E-T

THIN QFN (Dual);6 pin;
Dwg: 21-0137 (PDF)
Use pkgcode/variation: T633-2*

-40°C to +125°C

RoHS/Lead-Free: No
Materials Analysis

MAX6642ATT90+T

TDFN;6 pin;
Dwg: 21-0137 (PDF)
Use pkgcode/variation: T633+2*

-40°C to +125°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX6642ATT98+T

TDFN;6 pin;
Dwg: 21-0137 (PDF)
Use pkgcode/variation: T633+2*

-40°C to +125°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX6642ATT92+T

TDFN;6 pin;
Dwg: 21-0137 (PDF)
Use pkgcode/variation: T633+2*

-40°C to +125°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX6642YATT90+T

TDFN;6 pin;
Dwg: 21-0137 (PDF)
Use pkgcode/variation: T633+2*

-40°C to +125°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX6642YATT98+T

TDFN;6 pin;
Dwg: 21-0137 (PDF)
Use pkgcode/variation: T633+2*

-40°C to +125°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX6642ATT90-T

THIN QFN (Dual);6 pin;
Dwg: 21-0137 (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