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| 型号： | DS3905U-020 |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 2/11页 |
| 文件大小： | 0K |
| 描述： | IC POT NV TRIPLE 128POS 10-USOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 50 |
| 接片： | 128 |
| 电阻（欧姆）： | 20k |
| 电路数： | 3 |
| 温度系数： | 标准值 123 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： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 10-µMAX |
| 包装： | 管件 |
DS3904/DS3905
Triple 128-Position Nonvolatile Digital
Variable Resistor/Switch
10
_____________________________________________________________________
one clock pulse per bit of data. Figures 2 and 3
detail how data transfer is accomplished on the 2-
wire bus. Depending upon the state of the R/W bit,
two types of data transfer are possible.
Each data transfer is initiated with a start condition
and terminated with a stop condition. The number
of data bytes transferred between start and stop
conditions is not limited and is determined by the
master device. The information is transferred byte-
wise and each receiver acknowledges with a ninth
bit.
Within the bus specifications, a regular mode
(100kHz clock rate) and a fast mode (400kHz clock
rate) are defined. The DS3904/DS3905 work in both
modes.
Acknowledge: Each receiving device, when
addressed, generates an acknowledge after the
byte has been received. The master device must
generate an extra clock pulse that is associated
with this acknowledge bit.
A device that acknowledges must pull down the
SDA line during the acknowledge clock pulse in
such a way that the SDA line is a stable low during
the high period of the acknowledge-related clock
pulse. Of course, setup and hold times must be
taken into account. A master must signal an end of
data to the slave by not generating an acknowl-
edge bit on the last byte that has been clocked out
of the slave. In this case, the slave must leave the
data line high to enable the master to generate the
stop condition.
Data transfer from a master transmitter to a
slave receiver. The first byte transmitted by the
master is the command/control byte. Next follows a
number of data bytes. The slave returns an
acknowledge bit after each received byte.
Data transfer from a slave transmitter to a mas-
ter receiver. The master transmits the first byte (the
command/control byte) to the slave. The slave then
returns an acknowledge bit. Next follows the data
byte transmitted by the slave to the master. The
master returns NACK followed by a stop.
The master device generates all 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 is
not released.
1
MSB
START
LSB
COMMAND BYTE
*DS3904, USE 0's INSTEAD OF A2 AND A1 FOR THE DEVICE ADDRESS
DEVICE IDENTIFIER
OR
"FAMILY CODE"
SLAVE
ADDRESS
0
1
0
A2* A1* A0 R/W
MSB
LSB
DATA BYTE
RHIZ
CONTROL BIT
RESISTOR SETTING
Figure 4. Command and Data Byte Structures
MSB
A0h
A1h
F8h
F9h
FAh
00h
80h
7Fh
F9h
LSB
10
0
10
00
START
MSB
LSB
111
ACK
11
0
MSB
LSB
0
10
0
10
00
START
MSB
LSB
11
1
ACK
STOP
ACK
11
0
1
MSB
LSB
0
10
0
10
00
START
MSB
LSB
11
1
ACK
STOP
ACK
11
0
1
0
MSB
LSB
10
0
10
00
START
MSB
LSB
11
1
ACK
11
0
1
READ RESISTOR 1 VALUE
A0 = GND FOR DS3904
A0, A1, A2 = GND FOR DS3905
WRITE RESISTOR 0
TO MIN POSITION
MSB
LSB
10
0
10
00
REPEATED
START
MSB
LSB
ACK
STOP
NACK
FROM
SLAVE
FROM
SLAVE
FROM
SLAVE
MASTER
0
1
STOP
MSB
LSB
000
ACK
00
0
MSB
LSB
100
ACK
00
0
MSB
LSB
011
ACK
11
1
SET RESISTOR 1 TO Hi-Z
WRITE RESISTOR 2 TO
MAX POSITION
EXAMPLE 2-WIRE TRANSACTIONS
RESISTOR DATA
Figure 5. Example 2-Wire Transactions
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS3905U-020/T&R | 制造商:Maxim Integrated Products 功能描述:TRIPLE NV DIG RES T&R - Tape and Reel |
| DS3905U-020/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 |
| DS3905U-020+ | 功能描述:数字电位计 IC Triple 128-Position Nonvolatile 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 |
| DS3905U-020+T&R | 制造商:Maxim Integrated Products 功能描述:DGTL POTENTIOMETER 128POS 20KOHM TRIPLE 10USOP - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC POT NV TRIPLE 128POS 10-USOP 制造商:Maxim Integrated Products 功能描述:Digital Potentiometer ICs Triple 128-Position Nonvolatile |
| DS3905U-020+T&R | 功能描述:数字电位计 IC Triple 128-Position Nonvolatile 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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