PCA9540BDP 2通道I2C总线多路复用器

PCA9540B是一款二选一双向变换多路复用器,通过I²C总线进行控制。SCL/SDA上游对会扇出两个SCx/SDx下游对或通道。一次只选择一条SCx/SDx通道,由可编程控制寄存器的内容决定。

上电复位功能会将寄存器设为其默认状态并初始化I²C总线状态机而不选择任何通道。

多路复用器的传递门如此构造,使得VDD引脚可用于限制PCA9540B所传递的最高电压。这允许在各SCx/SDx对上使用不同的总线电压,在没有任何额外保护的情况下使1.8 V、2.5 V或3.3 V部件能够与5 V部件通信。外部上拉电阻可将总线上拉至该通道想要的电压电平。所有I/O引脚均为5 V耐受。

产品特点 Features
封装
型号 可订购的器件编号 订购码 (12NC) 产品状态 封装
PCA9540BDP 9352 760 36118 PCA9540BDP,118 量产 TSSOP8 (SOT505-1)
PCA9540BDP/DG 9352 933 84118 PCA9540BDP/DG,118 量产 TSSOP8 (SOT505-1)
订货和供应
型号 订购码 (12NC) 可订购的器件编号 化学成分
PCA9540BDP 9352 760 36118 PCA9540BDP,118 PCA9540BDP
PCA9540BDP/DG 9352 933 84118 PCA9540BDP/DG,118 PCA9540BDP/DG
PCA9540BDP 技术支持
档案名称 标题 类型 格式
PCA9540BDP 2-channel I2C-bus multiplexer Data sheet pdf
AN10441 Level shifting techniques in I2C-bus design Application note pdf
AN255 I2C / SMBus Repeaters, Hubs and Expanders Application note pdf
AN10710 Features and applications of the PCA9540B I2C-bus extender Application note pdf
75016527 Extend standard I2C-bus devices without worrying about offset voltages; NXP I2C-bus extender PCA9540B in a proven application Brochure pdf
75016532 Extend the I2C-bus with advanced repeaters and hubs; NXP 2-channel I2C-bus repeaters PCA9540Bx and 5-channel I2C-bus hubs PCA9516x Leaflet pdf
75016080 Extend the reach of any I2C-bus system without special offset voltage levels; NXP I2C-bus extender PCA9540B Leaflet pdf
75017424 NXP I2C-bus solutions 2013: Smart, simple solutions for the 12 most common design concerns Leaflet pdf
UM10204 I2C-bus specification and user manual User manual pdf
UM10206 I2C Demonstration Board 2005-1 Quick Start Guide User manual pdf
UM10323 PCA9600 demonstration board OM6293 User manual pdf