参数资料
| 型号： | DS1841N+T&R |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 6/17页 |
| 文件大小： | 0K |
| 描述： | IC RES LOG NV I2C 10-TDFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 接片： | 128 |
| 电阻（欧姆）： | 22k |
| 电路数： | 1 |
| 温度系数： | 标准值 ±250 ppm/°C |
| 存储器类型： | 非易失 |
| 接口： | I²C，2 线串口 |
| 电源电压： | 2.7 V ~ 5.5 V |
| 工作温度： | -40°C ~ 100°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-WFDFN 裸露焊盘 |
| 供应商设备封装： | 10-TDFN-EP（3x3） |
| 包装： | 带卷 (TR) |
DS1841
Temperature-Controlled, NV, I2C,
Logarithmic Resistor
14
______________________________________________________________________________________
Byte read: A byte read is an 8-bit information transfer
from the slave to the master plus a 1-bit ACK or NACK
from the master to the slave. The 8 bits of information
that are transferred (most significant bit first) from the
slave to the master are read by the master using the bit
read definition, and the master transmits an ACK using
the bit write definition to receive additional data bytes.
The master must NACK the last byte read to terminate
communication so the slave returns control of SDA to
the master.
Slave address byte: Each slave on the I2C bus
responds to a slave address byte sent immediately fol-
lowing a START condition. The slave address byte con-
tains the slave address in the most significant 7 bits
and the R/W bit in the least significant bit.
The DS1841’s slave address is determined by the state
of the A0 and A1 address pins as shown in Figure 2.
Address pins tied to GND result in a 0 in the corre-
sponding bit position in the slave address. Conversely,
address pins tied to VCC result in a 1 in the corre-
sponding bit positions.
When the R/W bit is 0 (such as in 50h), the master is
indicating that it will write data to the slave. If R/W = 1
(51h in this case), the master is indicating that it wants
to read from the slave.
If an incorrect slave address is written, the DS1841
assumes the master is communicating with another I2C
device and ignores the communication until the next
START condition is sent.
Memory address: During an I2C write operation, the
master must transmit a memory address to identify the
memory location where the slave is to store the data.
The memory address is always the second byte trans-
mitted during a write operation following the slave
address byte.
I2C Communication
Writing a single byte to a slave: The master must gen-
erate a START condition, write the slave address byte
(R/W = 0), write the memory address, write the byte of
data, and generate a STOP condition. Remember the
master must read the slave’s acknowledgment during
all byte write operations.
When writing to the DS1841, the potentiometer adjusts to
the new setting once it has acknowledged the new data
that is being written, and the EEPROM is written following
the STOP condition at the end of the write command. To
change the setting without changing the EEPROM, termi-
nate the write with a repeated START condition before
the next STOP condition occurs. Using a repeated
START condition prevents the tW delay required for the
EEPROM write cycle to finish.
SDA
SCL
tHD:STA
tLOW
tHIGH
tR
tF
tBUF
tHD:DAT
tSU:DAT
REPEATED
START
tSU:STA
tHD:STA
tSU:STO
tSP
STOP
NOTE: TIMING IS REFERENCE TO VIL(MAX) AND VIH(MIN).
START
Figure 3. I2C Timing Diagram
相关PDF资料 |
PDF描述 |
|---|---|
| MS3108E28-11S | CONN PLUG 22POS RT ANG W/SCKT |
| IDT72V71643DAG | IC DGTL SW 4096X4096 144-TQFP |
| IDT72V71643DA | IC DGTL SW 4096X4096 144-TQFP |
| DS1881E-050+T&R | IC DGTL POT NV 2CH 45K 16TSSOP |
| IDT72V70840DA | IC DGTL SW 4096X4096 144-TQFP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1841T+ | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Temperature-Controlled, NV, I2C, Logarithmic Resistor |
| DS1841T+T&R | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Temperature-Controlled, NV, I2C, Logarithmic Resistor |
| DS1841T+TR | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Temperature-Controlled, NV, I2C, Logarithmic Resistor |
| DS1841X | 功能描述:数字电位计 IC Temp-Cntrlld NV I2C Logarithmic Resistor 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 |
| DS1842 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:76V, APD, Bias Output Stage with Current Monitoring |
发布紧急采购，3分钟左右您将得到回复。