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参数资料
| 型号： | DS18S20+PAR |
| 厂商： | Maxim Integrated |
| 文件页数： | 5/20页 |
| 文件大小： | 0K |
| 描述： | IC THERM MICROLAN HI-PREC TO-92 |
| 产品培训模块： | 1-Wire Communications Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 500 |
| 感应温度： | -55°C ~ 125°C |
| 输出类型： | 数字 |
| 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-92-3 |
| 包装： | 管件 |
DS18S20-PAR
so the master can determine exactly which DS18S20-PARs have experienced an alarm condition. If an
alarm condition exists and the T H or T L settings have changed, another temperature conversion should be
done to validate the alarm condition.
64-BIT LASERED ROM CODE
Each DS18S20-PAR contains a unique 64–bit code (see Figure 5) stored in ROM. The least significant 8
bits of the ROM code contain the DS18S20-PAR’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-PAR to operate as a 1–wire device using the protocol detailed in the 1-WIRE BUS
SYSTEM section of this datasheet.
64-BIT LASERED ROM CODE Figure 5
8-BIT CRC
48-BIT SERIAL NUMBER
8-BIT FAMILY CODE (10h)
MSB
LSB MSB
LSB
MSB
LSB
to the scratchpad at any time using the Recall E [B8h] command. The master can issue “read time slots”
MEMORY
The DS18S20-PAR’s memory is organized as shown in Figure 6. The memory consists of an SRAM
scratchpad with nonvolatile EEPROM storage for the high and low alarm trigger registers (T H and T L ).
Note that if the DS18S20-PAR alarm function is not used, the T H and T L registers can serve as general-
purpose memory. All memory commands are described in detail in the DS18S20-PAR FUNCTION
COMMANDS section.
Byte 0 and byte 1 of the scratchpad contain the LSB and the MSB of the temperature register,
respectively. These bytes are read-only. Bytes 2 and 3 provide access to T H and T L registers. Bytes 4
and 5 are reserved for internal use by the device and cannot be overwritten; these bytes will return all 1s
when read. Bytes 6 and 7 contain the COUNT REMAIN and COUNT PER oC registers, which can be
used to calculate extended resolution results as explained in the OPERATION – MEASURING
TEMPERATURE section. Byte 8 of the scratchpad is read-only and contains the cyclic redundancy
check (CRC) code for bytes 0 through 7 of the scratchpad. The DS18S20-PAR generates this CRC using
the method described in the CRC GENERATION section.
Data is written to bytes 2 and 3 of the scratchpad using the Write Scratchpad [4Eh] command; the data
must be transmitted to the DS18S20-PAR starting with the least significant bit of byte 2. To verify data
integrity, the scratchpad can be read (using the Read Scratchpad [BEh] command) after the data is
written. When reading the scratchpad, data is transferred over the 1-Wire bus starting with the least
significant bit of byte 0. To transfer the T H and T L data from the scratchpad to EEPROM, the master
must issue the Copy Scratchpad [48h] command.
Data in the EEPROM registers is retained when the device is powered down; at power-up the EEPROM
data is reloaded into the corresponding scratchpad locations. Data can also be reloaded from EEPROM
2
(see the 1-WIRE BUS SYSTEM section) following the Recall E 2 command and the DS18S20-PAR will
indicate the status of the recall by transmitting 0 while the recall is in progress and 1 when the recall is
done.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS18S20-PAR/T&R | 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 |
| DS18S20-PAR+T&R | 制造商:Maxim Integrated Products 功能描述: 制造商:Maxim Integrated Products 功能描述:TEMP SENSOR DGTL 1-WIRE 3PIN TO-92 - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC THERM MICROLAN HI-PREC TO-92 制造商:Maxim Integrated Products 功能描述:Board Mount Temperature Sensors Prgmble Resolution 1-Wire Parasite Pwr |
| DS18S20-PAR+T&R | 功能描述:板上安装温度传感器 Prgmble Resolution 1-Wire Parasite Pwr 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 |
| DS18S20-SL/T&R | 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 |
| DS18S20-SL+T&R | 制造商:Maxim Integrated Products 功能描述:TEMP SENSOR DGTL 1-WIRE - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC THERM MICROLAN HI-PREC TO-92 制造商:Maxim Integrated Products 功能描述:Board Mount Temperature Sensors Prgmble Resolution 1-Wire Parasite Pwr |
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