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DS1855X-010

更新时间： 2024-01-18 17:17:48
品牌 Logo 应用领域
达拉斯 - DALLAS 转换器电位器存储电阻器
页数 文件大小 规格书
20页 252K
描述
Dual Nonvolatile Digital Potentiometer and Secure Memory

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DS1855X-010 技术参数

是否无铅： 含铅是否Rohs认证： 不符合
生命周期：Active零件包装代码：BGA
包装说明：0.100 X 0.100 INCH, FCP-14针数：14
Reach Compliance Code：not_compliantECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.84
Is Samacsys：N其他特性：NONVOLATILE MEMORY; OTHER RESISTOR VALUE IS 10000 OHM WITH 100 TAP POSITION
标称带宽：1 kHz控制接口：2-WIRE SERIAL
转换器类型：DIGITAL POTENTIOMETERJESD-30 代码：R-PBGA-B14
JESD-609代码：e0长度：2.338 mm
功能数量：2位置数：256
端子数量：14最高工作温度：85 °C
最低工作温度：-40 °C封装主体材料：PLASTIC/EPOXY
封装代码：VFBGA封装等效代码：FLIP CHIP
封装形状：RECTANGULAR封装形式：GRID ARRAY, VERY THIN PROFILE, FINE PITCH
峰值回流温度（摄氏度）：NOT SPECIFIED电源：3/5 V
认证状态：Not Qualified电阻定律：LINEAR
最大电阻容差：20%最大电阻器端电压：3.3 V
最小电阻器端电压：-0.3 V座面最大高度：0.841 mm
子类别：Digital Potentiometers标称供电电压：3 V
表面贴装：YES标称温度系数：750 ppm/ °C
温度等级：INDUSTRIAL端子面层：Tin/Lead (Sn/Pb)
端子形式：BALL端子位置：BOTTOM
处于峰值回流温度下的最长时间：NOT SPECIFIED标称总电阻：10000 Ω
宽度：2.109 mmBase Number Matches：1

DS1855X-010 数据手册

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DS1855  
The DS1855 is capable of an 8-byte page write. A page write is initiated the same way as a byte write, but  
the master does not send a STOP condition after the first byte. Instead, after the slave acknowledges  
receipt of the data byte, the master can send up to seven more bytes using the same nine-clock sequence.  
The master must terminate the write cycle with a STOP condition or the data clocked into the DS1855  
will not be latched into permanent memory.  
Acknowledge Polling  
Once the internally timed write has started and the DS1855 inputs are disabled, acknowledge polling can  
be initiated. The process involves transmitting a START condition followed by the device address. The  
R/W bit signifies the type of operation that is desired. The read or write sequence will only be allowed to  
proceed if the internal write cycle has completed and the DS1855 responds with a zero.  
Read Operations  
After receiving a matching address byte with the R/W bit set high, the device goes into the read mode of  
operation. There are three read operations: current address read, random read, and sequential address  
read.  
CURRENT ADDRESS READ  
The DS1855 has an internal address register that maintains the address used during the last read or write  
operation, incremented by one. This data is maintained as long as VCC is valid. If the most recent address  
was the last byte in memory, the register resets to the first address. This address stays valid between  
operations as long as power is available.  
Once the device address is clocked in and acknowledged by the DS1855 with the R/W bit set to high, the  
current address data word is clocked out. The master does not respond with a zero, but does generate a  
STOP condition afterwards.  
RANDOM READ  
A random read requires a dummy-byte write sequence to load in the data word address. Once the device  
and data address bytes are clocked in by the master and acknowledged by the DS1855, the master must  
generate another START condition. The master now initiates a current address read by sending the device  
address with the read/write bit set high. The DS1855 acknowledges the device address and serially clocks  
out the data byte.  
SEQUENTIAL ADDRESS READ  
Sequential reads are initiated by either a current address read or a random address read. After the master  
receives the first data byte, the master responds with an acknowledge. As long as the DS1855 receives  
this acknowledge after a byte is read, the master may clock out additional data words from the DS1855.  
After reaching address FFh, it resets to address 00h.  
The sequential read operation is terminated when the master initiates a STOP condition. The master does  
not respond with a zero.  
For a more detailed description of 2-wire theory of operation, refer to the next section.  
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