Datasheet > 传感器/换能器 > 温度传感器> DS18B20Z+T&R

DS18B20Z+T&R

更新时间： 2024-02-29 13:46:15

品牌	Logo	应用领域
美信 - MAXIM		传感器换能器温度传感器输出元件
页数	文件大小	规格书
22页	243K
描述
Serial Switch/Digital Sensor, 12 Bit(s), 0.50Cel, Rectangular, 8 Pin, Surface Mount, 0.150 INCH, LEAD FREE, SOIC-8

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DS18B20Z+T&R 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Active	包装说明：	SOP8,.25
Reach Compliance Code：	compliant	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	Factory Lead Time：	8 weeks
风险等级：	0.99	最大精度（摄氏度）：	0.5 Cel
其他特性：	COMPLIANCE TO MIL-150	主体宽度：	3.9 mm
主体高度：	1.55 mm	主体长度或直径：	4.9 mm
外壳：	PLASTIC	JESD-609代码：	e3
安装特点：	SURFACE MOUNT	位数：	12
端子数量：	8	最大工作电流：	1.5 mA
最高工作温度：	125 °C	最低工作温度：	-55 °C
输出接口类型：	1-WIRE INTERFACE	封装主体材料：	PLASTIC/EPOXY
封装等效代码：	SOP8,.25	封装形状/形式：	RECTANGULAR
电源：	3.3/5 V	传感器/换能器类型：	TEMPERATURE SENSOR,SWITCH/DIGITAL OUTPUT,SERIAL
子类别：	Other Sensors	最大供电电压：	5.5 V
最小供电电压：	3 V	表面贴装：	YES
端子面层：	Matte Tin (Sn)	端接类型：	SOLDER
Base Number Matches：	1

DS18B20Z+T&R 数据手册

DS18B20

MEMORY

The DS18B20’s memory is organized as shown in Figure 7. The memory consists of an SRAM

scratchpad with nonvolatile EEPROM storage for the high and low alarm trigger registers (T_Hand T_L)

and configuration register. Note that if the DS18B20 alarm function is not used, the T_Hand T_Lregisters

can serve as general-purpose memory. All memory commands are described in detail in the DS18B20

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_Hand T_Lregisters. Byte 4

contains the configuration register data, which is explained in detail in the Configuration Register section.

Bytes 5, 6, and 7 are reserved for internal use by the device and cannot be overwritten.

Byte 8 of the scratchpad is read-only and contains the CRC code for bytes 0 through 7 of the scratchpad.

The DS18B20 generates this CRC using the method described in the CRC Generation section.

Data is written to bytes 2, 3, and 4 of the scratchpad using the Write Scratchpad [4Eh] command; the data

must be transmitted to the DS18B20 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, T_Land configuration 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 to

the scratchpad at any time using the Recall E²[B8h] command. The master can issue read time slots

following the Recall E²command and the DS18B20 will indicate the status of the recall by transmitting 0

while the recall is in progress and 1 when the recall is done.

Figure 7. DS18B20 Memory Map

SCRATCHPAD

(POWER-UP STATE)

Byte 0 Temperature LSB (50h)

(85°C)

Byte 1 Temperature MSB (05h)

Byte 2 T_HRegister or User Byte 1*

Byte 3 T_LRegister or User Byte 2*

Byte 4 Configuration Register*

Byte 5 Reserved (FFh)

EEPROM

T_HRegister or User Byte 1

T_LRegister or User Byte 2

Configuration Register

Byte 6 Reserved

Byte 7 Reserved (10h)

Byte 8 CRC*

*Power-up state depends on value(s) stored in EEPROM.

7 of 22

1...4 5 678 9 10...22

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与DS18B20Z+T&R相关器件

型号	品牌	描述	获取价格	数据表
DS18S20	DALLAS	High Precision 1-Wire Digital Thermometer	获取价格
DS18S20	MAXIM	High-Precision 1-Wire Digital Thermometer	获取价格
DS18S20	ADI	1-Wire寄生供电数字温度计	获取价格
DS18S20/T&R	MAXIM	Serial Switch/Digital Sensor, 9 Bit(s), 0.50Cel, Rectangular, 3 Pin, Through Hole Mount, T	获取价格
DS18S20+PAR	MAXIM	暂无描述	获取价格
DS18S20+T&R	MAXIM	Serial Switch/Digital Sensor, 9 Bit(s), 0.50Cel, Rectangular, 3 Pin, Through Hole Mount, R	获取价格

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