参数资料
型号: DS1820
厂商: Maxim Integrated
文件页数: 6/23页
文件大小: 0K
描述: IC DGTL THERMOMETER TO92-3
其它有关文件: DS1820 Digital Thermometer
标准包装: 500
感应温度: -55°C ~ 125°C
输出类型: 开路漏极
电源电压: 3 V ~ 5.5 V
精确度: ±0.5°C
封装/外壳: TO-226-3、TO-92-3 标准主体
供应商设备封装: TO-92
包装: 散装
DS18S20
Figure 4. Supplying the Parasite-Powered DS18S20 During Temperature Conversions
V PU
DS18S20
μ P
V PU
GND DQ V DD
4.7k
1-Wire BUS
TO OTHER
1-WIRE DEVICES
Figure 5. Powering the DS18S20 with an External Supply
μ P
V PU
4.7k
1-Wire BUS
DS18S20
GND DQ V DD
V DD (EXTERNAL SUPPLY)
TO OTHER
1-WIRE DEVICES
64-BIT LASERED ROM CODE
Each DS18S20 contains a unique 64-bit code (see Figure 6) stored in ROM. The least significant 8 bits of
the ROM code contain the DS18S20’s 1-Wire family code: 10h. The next 48 bits contain a unique serial
number. The most significant 8 bits contain a cyclic redundancy check (CRC) byte that is calculated from
the first 56 bits of the ROM code. A detailed explanation of the CRC bits is provided in the CRC
Generation section. The 64-bit ROM code and associated ROM function control logic allow the
DS18S20 to operate as a 1-Wire device using the protocol detailed in the 1-Wire Bus System section.
Figure 6. 64-Bit Lasered ROM Code
8-BIT CRC
48-BIT SERIAL NUMBER
8-BIT FAMILY CODE (10h)
MSB
LSB
MSB
LSB
MSB
LSB
6 of 23
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