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General 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 tempera-
ture 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 bit
with the least significant bit (LSB) corresponding to
+0.25癈. The ALERT output asserts when the local or
remote overtemperature thresholds are violated. A fault
queue may be used to prevent the ALERT output from
setting until two consecutive faults have been detected.
Measurements can be done autonomously or in a sin-
gle-shot mode.
Remote accuracy is ?癈 maximum error between
+60癈 and +100癈. The MAX6642 operates from -40癈
to +125癈, and measures remote temperatures
between 0癈 and +150癈. The MAX6642 is available in
a 6-pin TDFN package with an exposed pad.
Applications
Desktop Computers
Notebook Computers
Servers
Thin Clients
Test and Measurement
Workstations
Graphic Cards
Features
o Dual Channel: Measures Remote and Local
Temperature
o +0.25?/SPAN>C Resolution
o High Accuracy ?/SPAN>1?/SPAN>C (max) (Remote) and 
?癈 (Local) from +60癈 to +100癈
o Measures Remote Temperature Up to +150?/SPAN>C
o Programmable Overtemperature Alarm
Temperature Thresholds
o SMBus/I
2
C-Compatible Interface
o Tiny TDFN Package with Exposed Pad
?癈, SMBus-Compatible Remote/Local
Temperature Sensor with Overtemperature Alarm
________________________________________________________________ Maxim Integrated Products   1
Ordering Information
19-2920; Rev 3; 10/09
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxims website at www.maxim-ic.com.
E
V
A
L
UA
T
IO
N
 
KI
T
A
V
A
IL
A
B
L
E
PART
TEMP RANGE
PIN-PACKAGE
MAX6642ATT90-T
-40癈 to +125癈
6 TDFN-EP*
MAX6642ATT92-T
-40癈 to +125癈
6 TDFN-EP*
MAX6642ATT94-T
-40癈 to +125癈
6 TDFN-EP*
MAX6642ATT96-T
-40癈 to +125癈
6 TDFN-EP*
MAX6642ATT98-T
-40癈 to +125癈
6 TDFN-EP*
MAX6642ATT9A-T
-40癈 to +125癈
6 TDFN-EP*
MAX6642ATT9C-T
-40癈 to +125癈
6 TDFN-EP*
MAX6642ATT9E-T
-40癈 to +125癈
6 TDFN-EP*
MAX6642
2200pF
0.1糉
糚
DXP
GND
SDA
SCLK
ALERT
DATA
CLOCK
INTERRUPT TO 糚
47?/DIV>
10k?EACH
3.3V
V
CC
Typical Operating Circuit
PART
MEA    RED TEMP RAN  E
T  P
MARK
MAX6642ATT90-T
0癈 to +150癈
AF
MAX6642ATT92-T
0癈 to +150癈
AFD
MAX6642ATT94-T
0癈 to +150癈
AFE
MAX6642ATT96-T
0癈 to +150癈
AFF
MAX6642ATT98-T
0癈 to +150癈
AEW
MAX6642ATT9A-T
0癈 to +150癈
AF
MAX6642ATT9C-T
0癈 to +150癈
AFH
MAX6642ATT9E-T
0癈 to +150癈
AFI
Selector Guide
T = Tape and reel.
*EP = Exposed pad.
Pin Configuration and Functional Diagram appear at end of
data sheet.
SMBus is a trademark of Intel Corp.
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相关代理商/技术参数
MAX6642ATT94-T 功能描述:板上安装温度传感器 RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor
MAX6642ATT96+ 制造商:Maxim Integrated Products 功能描述:- Rail/Tube
MAX6642ATT96-T 功能描述:板上安装温度传感器 RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor
MAX6642ATT98 制造商:Maxim Integrated Products 功能描述:1 C SMBUS-COMPATIBLE REMOTE/LOCAL TEMPERATURE SENSOR WITH O - Rail/Tube
MAX6642ATT98+ 制造商:Maxim Integrated Products 功能描述:TEMP SENSOR DGTL 2-WIRE 6TDFN EP - Rail/Tube
MAX6642ATT98+T 功能描述:板上安装温度传感器 SMBus-Compatible Temperature Sensor RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor
MAX6642ATT98-T 功能描述:板上安装温度传感器 RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor
MAX6642ATT9A-T 功能描述:板上安装温度传感器 RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor