PCA9505/PCA9506为I²C总线应用提供40位并行输入/输出(I/O)端口扩展,分为5组,每组8个I/O。在5 V供电电压时,输出能够拉出10 mA和灌入15 mA,在总封装负载为600 mA的情况下,允许直接驱动40个LED。可将40个I/O端口中的任何一个配置为输入或输出。输出端口为图腾柱且其逻辑状态在Acknowledge时改变(组更改)。除在所有I/O上附带100 kΩ内部上拉电阻外,PCA9505与PCA9506完全相同。PCA9506在I/O上不附带内部上拉电阻,以减少用作输出时或由推挽驱动器驱动输入时的功耗。
器件可配置为屏蔽每个输入端口以防其状态改变时生成中断,也可配置为系统主器件读取时反转I/O数据逻辑状态。
开漏中断输出引脚(1)允许监视输入引脚并在每次一个或多个输入端口发生变化时指定(除非已屏蔽)。
输出使能(1)引脚可指定任何被选作输出的I/O的三态,并可用作输入信号以使LED闪烁或调光(频率 > 80 Hz且更改占空比的PWM)。
内部上电复位(POR)或硬件复位(1)引脚会将40个I/O初始化为输入。三个地址选作引脚配置8个从地址之一。
PCA9506提供56引脚TSSOP和HVQFN封装,而PCA9505仅提供TSSOP封装。它们均用于-40 Cel至+85 Cel的工业温度范围。
产品特点 Features
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应用
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型号 | 可订购的器件编号 | 订购码 (12NC) | 产品状态 | 封装 |
PCA9505DGG | 9352 844 86118 | PCA9505DGG,118 | 量产 | TSSOP56 (SOT364-1) |
PCA9505DGG | 9352 844 86112 | PCA9505DGG,112 | 量产 | TSSOP56 (SOT364-1) |
PCA9506BS | 9352 815 75118 | PCA9506BS,118 | 量产 | HVQFN56 (SOT684-1) |
PCA9506DGG | 9352 807 98518 | PCA9506DGG,518 | 量产 | TSSOP56 (SOT364-1) |
PCA9506DGG | 9352 807 98512 | PCA9506DGG,512 | 量产 | TSSOP56 (SOT364-1) |
型号 | 订购码 (12NC) | 可订购的器件编号 | 化学成分 |
PCA9505DGG | 9352 844 86118 | PCA9505DGG,118 | PCA9505DGG |
PCA9505DGG | 9352 844 86112 | PCA9505DGG,112 | PCA9505DGG |
PCA9506BS | 9352 815 75118 | PCA9506BS,118 | PCA9506BS |
PCA9506DGG | 9352 807 98518 | PCA9506DGG,518 | PCA9506DGG |
PCA9506DGG | 9352 807 98512 | PCA9506DGG,512 | PCA9506DGG |
档案名称 | 标题 | 类型 | 格式 |
PCA9505_06 | 40-bit I2C-bus I/O port with RESET, OE and INT | Data sheet | |
AN10441 | Level shifting techniques in I2C-bus design | Application note | |
AN255 | I2C / SMBus Repeaters, Hubs and Expanders | Application note | |
AN10710 | Features and applications of the PCA9505_06 I2C-bus extender | Application note | |
75016527 | Extend standard I2C-bus devices without worrying about offset voltages; NXP I2C-bus extender PCA9505_06 in a proven application | Brochure | |
75016532 | Extend the I2C-bus with advanced repeaters and hubs; NXP 2-channel I2C-bus repeaters PCA9515x and 5-channel I2C-bus hubs PCA9516x | Leaflet | |
75016080 | Extend the reach of any I2C-bus system without special offset voltage levels; NXP I2C-bus extender PCA9505_06 | Leaflet | |
75017424 | NXP I2C-bus solutions 2013: Smart, simple solutions for the 12 most common design concerns | Leaflet | |
UM10204 | I2C-bus specification and user manual | User manual | |
UM10206 | I2C Demonstration Board 2005-1 Quick Start Guide | User manual | |
UM10323 | PCA9600 demonstration board OM6293 | User manual |