参数资料
型号: SE98ATL,147
厂商: NXP Semiconductors
文件页数: 28/43页
文件大小: 849K
描述: IC TEMP SENSOR DDR 3.6V 8-HXSON
标准包装: 1
功能: 温度监控系统(传感器)
传感器类型: 内部
感应温度: -40°C ~ 125°C
精确度: ±4°C(最小值)
拓扑: ADC(三角积分型),寄存器库
输出类型: I²C?/SMBus?
输出警报:
输出风扇:
电源电压: 1.7 V ~ 3.6 V
工作温度: -40°C ~ 125°C
安装类型: 表面贴装
封装/外壳: 8-WFDFN 裸露焊盘
供应商设备封装: 8-WSON
包装: 标准包装
其它名称: 568-4780-6
SE98A_4
?NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 04  25 November 2009
28 of 43
NXP Semiconductors
SE98A
DDR memory module temp sensor, 1.7 V to 3.6 V
9.1  SE98A in memory module application
Figure 15
 shows the SE98A being placed in the memory module application with the
SPD. The SE98A is centered in the memory module to provide the function to monitor the
temperature of the DRAM. In the event of overheat, the SE98A triggers the EVENT
 output
and the memory controller can throttle the memory bus to slow the DRAM, or the CPU can
increase the refresh rate for the DRAM. The memory controller can also read the SE98A
and watch the DRAM thermal behavior.
 
9.2  Layout consideration
The SE98A does not require any additional components other than the host controller to
measure temperature. A 0.1 糉 bypass capacitor between the V
DD
 and V
SS
 pins is
located as close as possible to the power and ground pins for noise protection.
9.3  Thermal considerations
In general, self-heating is the result of power consumption and not a concern, especially
with the SE98A, which consumes very low power. In the event the SDA and EVENT
 pins
are heavily loaded with small pull-up resistor values, self-heating affects temperature
accuracy by approximately 0.5 癈.
Equation 1
 is the formula to calculate the effect of self-heating:
(1)
where:
擳 = T
j
 T
amb
T
j
 = junction temperature
T
amb
 = ambient temperature
R
th(j-a)
 = package thermal resistance
V
DD
 = supply voltage
I
DD(AV)
 = average supply current
V
OL(SDA)
 = LOW-level output voltage on pin SDA
V
OL(EVENT)
 = LOW-level output voltage on pin EVENT
Fig 15.   System application
002aad76
SE98A
EVENT
DIMM
DRAM
DRAM
DRAM
DRAM
MEMORY CONTROLLER
SMBus
CPU
SPD
SDA
SCL
?SPAN class="pst SE98ATP-547_2307474_14">T   R
th j-a
(    )
V
DD
I
DD AV
(    )
?/DIV>
(
)    V
OL SDA
(
)
I
OL
k
sin
(
) SDA
(
)
?/DIV>
(
)    V
OL EVENT
(
)
I
OL
k
sin
(
)EVENT
?/DIV>
(
)
+
+
[
]
?/DIV>
=
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SE98ATP 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:DDR memory module temp sensor, 1.7 V to 3.6 V
SE98ATP,147 功能描述:板上安装温度传感器 I2 CLOCAL +/-1OC 1.7-3.6V TSDIMM 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
SE98ATP,547 功能描述:板上安装温度传感器 PROG TWI DIG 3.6V 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
SE98PW 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:SO-DIMM SMBus/I2C-bus temperature sensor
SE98PW,118 功能描述:板上安装温度传感器 I2C LOCAL +/- 2OC 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