参数资料
型号: SE98APW,118
厂商: NXP Semiconductors
文件页数: 5/43页
文件大小: 849K
描述: IC TEMP SENSOR DDR 8-TSSOP
产品培训模块: I²C Bus Fundamentals
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-TSSOP,8-MSOP(0.118",3.00mm 宽)
供应商设备封装: 8-TSSOP
包装: 标准包装
产品目录页面: 847 (CN2011-ZH PDF)
其它名称: 568-4732-6
SE98A_4
?NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 04  25 November 2009
5 of 43
NXP Semiconductors
SE98A
DDR memory module temp sensor, 1.7 V to 3.6 V
7.   Functional description
7.1  Serial bus interface
The SE98A uses the 2-wire serial bus (I
2
C-bus/SMBus) to communicate with a host
controller. The serial bus consists of a clock (SCL) and data (SDA) signals. The device
can operate on either the I
2
C-bus Standard/Fast mode or SMBus. The I
2
C-bus
Standard-mode is defined to have bus speeds from 0 Hz to 100 kHz, I
2
C-bus Fast-mode
from 0 Hz to 400 kHz, and the SMBus is from 10 kHz to 100 kHz. The host or bus master
generates the SCL signal, and the SE98A uses the SCL signal to receive or send data on
the SDA line. Data transfer is serial, bidirectional, and is one bit at a time with the Most
Significant Bit (MSB) transferred first, and a complete I
2
C-bus data is 1 byte. Since SCL
and SDA are open-drain, pull-up resistors must be installed on these pins.
7.2  Slave address
The SE98A uses a 4-bit fixed and 3-bit programmable (A0, A1 and A2) 7-bit slave address
that allows a total of eight devices to coexist on the same bus. The input of each pin is
sampled at the start of each I
2
C-bus/SMBus access. The A0, A1 and A2 pins are pulled
LOW internally. The A0 pin is also overvoltage tolerant, supporting 10 V software write
protection when applied to the SPD that shares common address lines.
 
Fig 5.    Slave address
R/W
002aab304
0
0
1
1
A2
A1
A0
fixed
hardware
selectable
slave address
MSB
LSB
X
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