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参数资料
| 型号： | DS1845E-050+T&R |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 8/14页 |
| 文件大小： | 0K |
| 描述： | IC POT/MEM DUAL NV 50K 14-TSSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1,000 |
| 接片： | 100，256 |
| 电阻（欧姆）： | 10k，50k |
| 电路数： | 2 |
| 温度系数： | 标准值 750 ppm/°C |
| 存储器类型： | 非易失 |
| 接口： | I²C（设备位址） |
| 电源电压： | 2.7 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 14-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 14-TSSOP |
| 包装： | 带卷 (TR) |
DS1845
3 of 14
DS1845 BLOCK DIAGRAM Figure 1
MEMORY ORGANIZATION
The DS1845’s serial EEPROM is internally organized with 256 words of 1 byte each. Each word requires
an 8-bit address for random word addressing. The byte at address F9h determines the wiper setting for
potentiometer 0, which contains 100 positions. Writing values above 63h to this address sets the wiper to
its uppermost position. The byte at address F8h determines the wiper setting for potentiometer 1, which
contains 256 positions (00h to FFh). The factory default wiper position for both potentiometers is FFh.
Memory locations 00h to F7h are factory programmed to 00h. Address locations FAh though FFh are
reserved and should not be written.
DEVICE OPERATION
Clock and Data Transitions: The SDA pin is normally pulled high with an external resistor or device.
Data on the SDA pin may only change during SCL low time periods. Data changes during SCL high
periods will indicate a start or stop conditions depending on the conditions discussed below. Refer to the
timing diagram Fig 2 for further details.
Start Condition: A high-to-low transition of SDA with SCL high is a start condition which must
precede any other command. Refer to the timing diagram Fig 2 for further details.
Stop Condition: A low-to-high transition of SDA with SCL high is a stop condition. After a read
sequence, the stop command places the DS1845 into a low-power mode. Refer to the timing diagram Fig
2 for further details.
Acknowledge: All address and data byte are transmitted via a serial protocol. The DS1845 pulls the
SDA line low during the ninth clock pulse to acknowledge that it has received each word.
Standby Mode: The DS1845 features a low-power mode that is automatically enabled after power-on,
after a stop command, and after the completion of all internal operations.
VCC
GND
SDA
SCL
WP
A0
A1
A2
H0
W0
L0
H1
W1
L1
248 BYTES
EEPROM
MEMORY
6 RESERVED
BYTES
1 BYTE WIPER
SETTING
POT 0
1 BYTE WIPER
SETTING
POT 1
CONTROL
DATA
POTENTIOMETER 0
2-WIRE
INTERFACE
POTENTIOMETER 1
100
Position
Pot
256
Position
Pot
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1845E-10 | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
| DS1845E-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 |
| DS1845E-100/T&R | 制造商:Maxim Integrated Products 功能描述:DUAL NV POT & MEM TSSO T&R 10/100K - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC POT/MEM DUAL NV 100K 14-TSSOP |
| DS1845E-100/T&R | 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 |
| DS1845E-100+ | 功能描述:数字电位计 IC Dual NV w/Memory 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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