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DS1775R4&R

更新时间： 2024-01-10 20:16:36
品牌 Logo 应用领域
美信 - MAXIM 输出元件传感器换能器
页数 文件大小 规格书
17页 408K
描述
Serial Switch/Digital Sensor, 9 Bit(s), 2Cel, Rectangular, Surface Mount, LEAD FREE, SOT-23, 5 PIN

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中文翻译

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DS1775R4&R 技术参数

是否无铅： 含铅是否Rohs认证： 不符合
生命周期：ActiveReach Compliance Code：compliant
风险等级：5.72最大精度（摄氏度）：2 Cel
JESD-609代码：e0安装特点：SURFACE MOUNT
位数：9最大工作电流：1 mA
最高工作温度：125 °C最低工作温度：-55 °C
输出接口类型：2-WIRE INTERFACE封装形状/形式：RECTANGULAR
传感器/换能器类型：TEMPERATURE SENSOR,SWITCH/DIGITAL OUTPUT,SERIAL最大供电电压：5.5 V
最小供电电压：2.7 V表面贴装：YES
端子面层：Tin/Lead (Sn/Pb)端接类型：SOLDER
Base Number Matches：1

DS1775R4&R 数据手册

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DS1775  
DATA TRANSFER ON 2–WIRE SERIAL BUS Figure 4  
Figure 5 details how data transfer is accomplished on the two–wire bus. Depending upon the state of the  
R/W bit, two types of data transfer are possible:  
1. Data transfer from a master transmitter to a slave receiver. The first byte transmitted by the  
master is the slave address. Next follows a number of data bytes. The slave returns an acknowledge  
bit after each received byte.  
2. Data transfer from a slave transmitter to a master receiver. The first byte (the slave address) is  
transmitted by the master. The slave then returns an acknowledge bit. Next follows a number of data  
bytes transmitted by the slave to the master. The master returns an acknowledge bit after all received  
bytes other than the last byte. At the end of the last received byte, a ‘not acknowledge’ is returned.  
The master device generates all of the serial clock pulses and the START and STOP conditions. A  
transfer is ended with a STOP condition or with a repeated START condition. Since a repeated START  
condition is also the beginning of the next serial transfer, the bus will not be released.  
The DS1775 may operate in the following two modes:  
1. Slave receiver mode: Serial data and clock are received through SDA and SCL. After each byte is  
received, an acknowledge bit is transmitted. START and STOP conditions are recognized as the  
beginning and end of a serial transfer. Address recognition is performed by hardware after reception  
of the slave address and direction bit.  
2. Slave transmitter mode: The first byte is received and handled as in the slave receiver mode.  
However, in this mode, the direction bit will indicate that the transfer direction is reversed. Serial data  
is transmitted on SDA by the DS1775 while the serial clock is input on SCL. START and STOP  
conditions are recognized as the beginning and end of a serial transfer.  
SLAVE ADDRESS  
A control byte is the first byte received following the START condition from the master device. The  
control byte consists of a four bit control code; for the DS1775, this is set as 1001 binary for read and  
write operations. The next three bits of the control byte are the device select bits (A2, A1, A0). These bits  
are set to 000 (A2="0", A1="0", A0="0") for the DS1775R/TRL and vary according to the device's part  
number as specified in the "Ordering Information" section. They are used by the master device to select  
which of eight devices are to be accessed. The set bits are in effect the three least significant bits of the  
slave address. The last bit of the control byte (R/ W ) defines the operation to be performed. When set to a  
"1" a read operation is selected, and when set to a "0" a write operation is selected. Following the START  
condition, the DS1775 monitors the SDA bus checking the device type identifier being transmitted. Upon  
receiving the 1001 code and appropriate device select bits of 000, the DS1775 outputs an acknowledge  
signal on the SDA line.  
10 of 14  
1...78910111213...17

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