供应TJA1050T CAN总线驱动器IC
FEATURES
· Fully compatible with the “ISO 11898” standard
· High speed (up to 1 Mbaud)
· Very low ElectroMagnetic Emission (EME)
· Differential receiver with wide common-mode range for
high ElectroMagnetic Immunity (EMI)
· An unpowered node does not disturb the bus lines
· Transmit Data (TXD) dominant time-out function
· Silent mode in which the transmitter is disabled
· Bus pins protected against transients in an automotive
environment
· Input levels compatible with 3.3 V and 5 V devices
· Thermally protected
· Short-circuit proof to battery and to ground
· At least 110 nodes can be connected
GENERAL DESCRIPTION
The TJA1050 is the interface between the Controller Area
Network (CAN) protocol controller and the physical bus.
The device provides differential transmit capability to the
bus and differential receive capability to the CAN
controller.
The TJA1050 is the third Philips high-speed CAN
transceiver after the PCA82C250 and the PCA82C251.
The most important differences are:
· Much lower electromagnetic emission due to optimal
matching of the output signals CANH and CANL
· Improved behaviour in case of an unpowered node
· No standby mode.
This makes the TJA1050 eminently suitable for use in
nodes that are in a power-down situation in partially
powered networks.
数字温度传感器DS18B20的原理与应用 作者:马云峰,陈子夫,李培全 文章来源:电子元器件应用 引言 DS18B20是DALLAS公司生产的一线式数字温度传感器,具有3引脚TO-92小体积封装形式;温度测量范围为-55℃~+125℃,可编程为9位~12位A/D转换精度,测温分辨率可达0.0625℃,被测温度用符号扩展的16位数字量方式串行输出;其工作电源既可在远端引入,也可采用寄生电源方式产生;多个DS18B20可以并联到3根或2根线上,CPU只需一根端口线就能与诸多DS18B20通信,占用微处理器的端口较少,可节省大量的引线和逻辑电路。以上特点使DS18B20非常适用于远距离多点温度检测系统。2DS18B20的内部结构 DS18B20内部结构如图1所示,主要由4部分组成:64位ROM、温度传感器、非挥发的温度报警触发器TH和TL、配置寄存器。DS18B20的管脚排列如图2所示,DQ为数字信号输入/输出端;GND为电源地;VDD为外接供电电源输入端(在寄生电源接线方式时接地,见图4)。 ROM中的64位序列号是出厂前被光刻好的,它可以看作是该DS18B20的地址序列码,每个DS18B20的64位序列号均不相同。64位ROM的排的循环冗余校验码(CRC=X8+X5+X4+1)。ROM的作用是使每一个DS18B20都各不...
一、用途 该产品用于交流电动机连接,帮助单相电动机启动和运行,主要用于电风扇、排气扇、节能灯等。二、性能指标 项目 性能 环境温度 -25~+85℃ 额定电压 250VAC~500VAC 额定频率 50/60Hz 容量范围 0.47~24uF 容量偏差 ±5% 损耗角正切值 Tanδ≤0.002(100Hz;25℃) 试验电压 1.75Un/5s 三:使用条件 海拔:不超过2000m 投入时剩余电压:不超过Un的10% 允许电流:不超过In的1.3倍 允许电压:不超过1.1倍Un下长期运行。四、产品规格 标称电容uF 370-450V L*W*H 1 37*12.7*24 1.2 37*12.7*24 1.5 39*16*28 1.8 36.5*17*28 2 36.5*17*28 2.4 36.5*17*28 2.5 38*20*30 3 38*20*30 4 47*17.5*33 4.75 47*17.5*33 5 47*20*37 6 47*20*37 8 47*25*42 10 58*28*43 12 58*28*43 14 58*28*43 15 30*60*53 16 60*30*53 20 60*35*49 24 60*35*49复合型交流电动机电容器 标称电容uF ...