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参数资料
| 型号： | DS1867S-10+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 11/14页 |
| 文件大小： | 0K |
| 描述： | IC POT W/EEPROM DUAL 10K 16-SOIC |
| 标准包装： | 45 |
| 接片： | 256 |
| 电阻（欧姆）： | 10k |
| 电路数： | 2 |
| 温度系数： | 标准值 750 ppm/°C |
| 存储器类型： | 非易失 |
| 接口： | 3 线串口 |
| 电源电压： | 4.5 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 16-SOIC W |
| 包装： | 管件 |
| 产品目录页面： | 1430 (CN2011-ZH PDF) |
DS1867
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The Cout output of the DS1867 can be used to drive the DQ input of another DS1867. When connecting
multiple devices, the total number of bits sent is always 17 times the number of DS1867s in the daisy
chain.
An optional feedback resistor can be placed between the Cout terminal of the last device and the DQ input
of the first DS1867, thus allowing the controlling processor to read, as well as, write data or circularly
clock data through the daisy chain. The value of the feedback or isolation resistor should be in the range
from 2 to 10 kohms.
When reading data via the COUT pin and isolation resistor, the DQ line is left floating by the reading
device. When RST is driven high, bit 17 is present on the COUT pin, which is fed back to the input DQ pin
through the isolation resistor. When the CLK input transitions low to high, bit 17 is loaded into the first
position of the I/O shift register and bit 16 becomes present on COUT and DQ of the next device. After 17
bits (or 17 times the number of DS1867s in the daisy chain), the data has shifted completely around and
back to its original position. When RST transitions to the low state to end data transfer, the value (the
same as before the read occurred) is loaded into the wiper-0, wiper-1, and stack select bit I/O register.
CASCADING MULTIPLE DEVICES Figure 5
NONVOLATILE WIPER SETTINGS
The DS1867 maintains the position of the wiper in the absence of power. This feature is provided through
the use of EEPROM type memory cell arrays. During normal operation, the position of the wiper is
determined by the device multiplexers and stored in the shadow memory (EEPROM). The manner in
which an update occurs has been optimized for reliability, durability, and performance. Additionally, the
update operation is totally transparent to the user.
When power is applied to the DS1867, wiper settings will be the last recorded in the EEPROM memory
cells or shadow memory before the last power-down. Changes to the EEPROM memory cells occur
during a predefined power-down sequence. If the DS1867 detects a voltage transition to 4.5 volts or less,
on the power supply input, the part initiates an automatic wiper storage sequence. This storage sequence
will save in EEPROM memory the contents of the I/O shift register before a total power-shutdown;
provided specific power-down timing requirements are met. The minimum total power-down time is
specified at 4 milliseconds. Power-down timing requirements on VCC are shown in Figure 6.
The EEPROM memory cells are specified to accept greater than 25,000 writes before a wear-out
condition. If the EEPROM memory cells do reach a wear-out condition, the DS1867 will still function
properly while power is applied. A minimum time of 4 ms between 4.5V and 3V is required to perform
the proper position storage of the wiper.
相关PDF资料 |
PDF描述 |
|---|---|
| DS1867S-10 | IC POT W/EEPROM DUAL 10K 16-SOIC |
| VE-J12-MZ-F3 | CONVERTER MOD DC/DC 15V 25W |
| VE-J11-MZ-F2 | CONVERTER MOD DC/DC 12V 25W |
| VI-25W-MY-F3 | CONVERTER MOD DC/DC 5.5V 50W |
| VE-J11-MZ-F1 | CONVERTER MOD DC/DC 12V 25W |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1867S-10+ | 功能描述:数字电位计 IC Dual w/EEPROM RoHS:否 制造商:Maxim Integrated 电阻:200 Ohms 温度系数:35 PPM / C 容差:25 % POT 数量:Dual 每 POT 分接头:256 弧刷存储器:Volatile 缓冲刷: 数字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作电源电压:1.7 V to 5.5 V 电源电流:27 uA 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:TQFN-16 封装:Reel |
| DS1867S-100 | 功能描述:数字电位计 IC RoHS:否 制造商:Maxim Integrated 电阻:200 Ohms 温度系数:35 PPM / C 容差:25 % POT 数量:Dual 每 POT 分接头:256 弧刷存储器:Volatile 缓冲刷: 数字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作电源电压:1.7 V to 5.5 V 电源电流:27 uA 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:TQFN-16 封装:Reel |
| DS1867S-100+ | 功能描述:数字电位计 IC Dual w/EEPROM RoHS:否 制造商:Maxim Integrated 电阻:200 Ohms 温度系数:35 PPM / C 容差:25 % POT 数量:Dual 每 POT 分接头:256 弧刷存储器:Volatile 缓冲刷: 数字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作电源电压:1.7 V to 5.5 V 电源电流:27 uA 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:TQFN-16 封装:Reel |
| DS1867S-50 | 功能描述:数字电位计 IC RoHS:否 制造商:Maxim Integrated 电阻:200 Ohms 温度系数:35 PPM / C 容差:25 % POT 数量:Dual 每 POT 分接头:256 弧刷存储器:Volatile 缓冲刷: 数字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作电源电压:1.7 V to 5.5 V 电源电流:27 uA 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:TQFN-16 封装:Reel |
| DS1867S-50+ | 功能描述:数字电位计 IC Dual w/EEPROM RoHS:否 制造商:Maxim Integrated 电阻:200 Ohms 温度系数:35 PPM / C 容差:25 % POT 数量:Dual 每 POT 分接头:256 弧刷存储器:Volatile 缓冲刷: 数字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作电源电压:1.7 V to 5.5 V 电源电流:27 uA 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:TQFN-16 封装:Reel |
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