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19-2636; Rev 2; 11/03
Local/Remote Temperature Switches in a
μMAX Package
General Description
The MAX6687/MAX6688 comprise a remote-junction
temperature switch and a local temperature switch in a
single package. The remote-junction switch uses an
external P-N junction (typically a diode-connected tran-
sistor on the die of an external CPU, ASIC, or FPGA) as
a sensing element to measure the remote temperature.
The remote-junction temperature switch has a factory-
programmed trip temperature threshold of either
+120°C or +125°C. The local temperature switch has a
pin-programmable temperature threshold that is set by
connecting pins S1 and S2 to ground, to V DD , or leav-
ing them floating. Hysteresis for both local and remote
thresholds is 5°C. The MAX6687/MAX6688 do not
assert on transient (single-sample) faults or when
power is first applied.
The MAX6687 has two open-drain active-low outputs
while the MAX6688 has two push-pull active-high out-
puts. T REMOTE asserts a logic signal when the remote
temperature exceeds the factory-programmed +120°C
or +125°C trip threshold. T LOCAL is asserted when the
Features
o Pin-Programmable Local Temperature Threshold
in 5°C Increments in Two Distinct Ranges: +40°C
to +80°C and +75°C to +115°C
o Factory-Programmed Remote Threshold:
+120°C (L Suffix) or +125°C (H Suffix)
o Open-Drain Active-Low Outputs (MAX6687)
o CMOS Push-Pull, Active-High Outputs (MAX6688)
o ±1.5°C Accuracy
o 2Hz Temperature Sampling Rate
o 215μA Average Supply Current
o 3.0V to 5.5V Power-Supply Voltage
o 8-Pin μMAX Package
Ordering Information
die temperature exceeds the pin-programmed thresh-
old, which is controlled by pins S1 and S2. The local
thresholds are available in two ranges in 5°C incre-
ments. The two ranges are +40°C to +80°C and +75°C
to +115°C.
The MAX6687/MAX6688 operate from a 3.0V to 5.5V
power supply and are available in a space-saving 8-pin
μMAX package.
Applications
CPU Temperature Protection
PART
MAX6687 AU40L
MAX6687AU40H
MAX6687AU75L
MAX6687AU75H
MAX6688 AU40L
MAX6688AU40H
MAX6688AU75L
MAX6688AU75H
TEMP RANGE
-40 ° C to +125 ° C
-40 ° C to +125 ° C
-40 ° C to +125 ° C
-40 ° C to +125 ° C
-40 ° C to +125 ° C
-40 ° C to +125 ° C
-40 ° C to +125 ° C
-40 ° C to +125 ° C
PIN-PACKAGE
8 μMAX
8 μMAX
8 μMAX
8 μMAX
8 μMAX
8 μMAX
8 μMAX
8 μMAX
FPGA Temperature Protection
Fan Control
Pin Configurations/Functional Diagrams/Selector Guide
appear at end of data sheet.
Temperature Alarms
Typical Operating Circuit
3.3V
3.3V
TO SYSTEM
DXP
V DD
3.3V
DXP
V DD
T REMOTE
SHUTDOWN
C S
DXN
MAX6687
T REMOTE
C S
DXN
MAX6688
12V
μ P
S1
S2
T LOCAL
TO SYSTEM
SHUTDOWN
μ P
S1
S2
T LOCAL
N
GND
GND
________________________________________________________________ Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
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相关代理商/技术参数
MAX6688AU40H+T 功能描述:板上安装温度传感器 Remote-Junction Temperature Switch 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
MAX6688AU40H-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
MAX6688AU40L 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
MAX6688AU40L+ 功能描述:板上安装温度传感器 Remote-Junction Temperature Switch 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
MAX6688AU40L+T 功能描述:板上安装温度传感器 Remote-Junction Temperature Switch 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
MAX6688AU40L-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
MAX6688AU75H 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
MAX6688AU75H+ 功能描述:板上安装温度传感器 Remote-Junction Temperature Switch 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