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参数资料
| 型号： | DS2406P+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 27/32页 |
| 文件大小： | 0K |
| 描述： | IC SW ADDRESS DL W/1K MEM 6-TSOC |
| 产品培训模块： | 1-Wire Communications Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 120 |
| 应用： | 遥控，遥测 |
| 接口： | 1 线 |
| 电源电压： | 2.8 V ~ 6 V |
| 封装/外壳： | 6-LSOJ |
| 供应商设备封装： | 6-TSOC |
| 包装： | 管件 |
| 安装类型： | 表面贴装 |
| 产品目录页面： | 1429 (CN2011-ZH PDF) |
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DS2406
4 of 32
PARASITE POWER
The DS2406 can derive its power entirely from the 1-Wire bus by storing energy on an internal capacitor
during periods of time when the signal line is high. During low times the device continues to operate off
of this “parasite” power source until the 1-Wire bus returns high to replenish the parasite (capacitor)
supply. In applications where the device may be temporarily disconnected from the 1-Wire bus or where
the low-times of the 1-Wire bus may be very long the VCC pin may be connected to an external voltage
supply to maintain the device status.
When writing to the EPROM memory, the 1-Wire communication occurs at normal voltage levels and
then is pulsed momentarily to the programming voltage to cause the selected EPROM bits to be
programmed. The bus master must be able to provide 12V and 10mA to adequately program the EPROM
portions of the device. During programming, only EPROM-based devices are allowed to be present on
the 1-Wire bus.
64-BIT LASERED ROM
Each DS2406 contains a unique ROM code that is 64 bits long. The first 8 bits are a 1-Wire family code.
The next 48 bits are a unique serial number. The last 8 bits are a CRC of the first 56 bits. (See Figure 3).
The 1-Wire CRC is generated using a polynomial generator consisting of a shift register and XOR gates
as shown in Figure 4. The polynomial is X
8
+ X
5
+ X
4
+ 1. Additional information about the Dallas 1-
Wire Cyclic Redundancy Check is available in Application Note 27. The shift register bits are initialized
to zero. Then starting with the least significant bit of the family code, 1 bit at a time is shifted in. After the
8th bit of the family code has been entered, then the serial number is entered. After the 48th bit of the
serial number has been entered, the shift register contains the CRC value. Shifting in the 8 bits of CRC
should return the shift register to all zeros. The 64-bit ROM and the 1-Wire Function Control section
allow the DS2406 to operate as a 1-Wire device and follow the protocol detailed in the section “1-Wire
Bus System”.
64-BIT LASERED ROM Figure 3
MSB
LSB
8-Bit CRC Code
48-Bit Serial Number
8-Bit Family Code (12h)
MSB
LSB MSB
LSB
1-WIRE CRC GENERATOR Figure 4
R
X2
X1
X0
X8
X7
X6
X5
X4
X3
8TH
STAGE
7TH
STAGE
6TH
STAGE
5TH
STAGE
4TH
STAGE
3RD
STAGE
2ND
STAGE
1ST
STAGE
S
INPUT DATA
Polynomial = X8 + X5 + X4 + 1
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS2406P/R | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:Dual Addressable Switch Plus 1kbit Memory |
| DS2406P/T | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:Dual Addressable Switch Plus 1kbit Memory |
| DS2406P/T&R | 制造商:Maxim Integrated Products 功能描述:IC SW DL ADDRESS W/1K MEM 6-TSOC |
| DS2406P/T&R | 功能描述:接口 - 专用 RoHS:否 制造商:Texas Instruments 产品类型:1080p60 Image Sensor Receiver 工作电源电压:1.8 V 电源电流:89 mA 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:BGA-59 |
| DS2406P/TR | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Peripheral IC |
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