PCA9554BS3: 带有中断的8位I2C总线和SMBus I/O端口

PCA9554和PCA9554A是16引脚CMOS器件,为I²C总线/SMBus应用提供8位通用并行输入/输出(GPIO)扩展,是为增强NXP Semiconductors的I²C总线I/O扩展器系列而开发的。改进内容包括更高的驱动能力、5 V I/O容限、更低的供电电流、独立的I/O配置、400 kHz时钟频率和更小的封装。ACPI电源开关、传感器、按钮、LED、风扇等需要额外的I/O时,I/O扩展器提供简易的解决方案。

PCA9554/PCA9554A由8位配置寄存器(输入或输出选择)、8位输入端口寄存器、8位输出端口寄存器和8位极性反转寄存器(高电平有效或低电平有效操作)组成。系统主器件可通过写入I/O配置位将I/O用作输入或输出。每个输入或输出的数据保留在对应的输入端口或输出端口寄存器中。通过极性反转寄存器可反转读取寄存器的极性。系统主器件可读取所有寄存器。虽然引脚对引脚和I²C总线地址都兼容PCF8574系列,但是因增强功能而需要软件更改,这在应用注意事项AN469中讨论。

当任何输入状态与其对应的输入端口寄存器状态不同时,会激活PCA9554/PCA9554A开漏中断输出并用于通知系统主器件输入状态已改变。上电复位会将寄存器设为其默认值并初始化器件状态机。

三个硬件引脚(A0、A1、A2)会改变固定I²C总线地址,因而允许最多八个器件共享相同的I²C总线/SMBus。除允许相同I²C总线/SMBus上存在最多十六个这些器件(各八个)的固定I²C总线地址不同外,PCA9554A与PCA9554完全相同。

sot758-1_3d
数据手册 (1)
名称/描述Modified Date
8-bit I2C-bus and SMBus I/O port with interrupt (REV 9.0) PDF (585.0 kB) PCA9554_9554A [English]19 Mar 2013
用户指南 (3)
名称/描述Modified Date
I2C-bus specification and user manual (REV 6.0) PDF (1.4 MB) UM10204 [English]28 Apr 2014
I2C-bus specification and user manual (REV 5.0) PDF (1.6 MB) UM10204_JA [English]03 Apr 2013
I2C Demonstration Board 2005-1 Quick Start Guide (REV 1.0) PDF (261.0 kB) UM10206 [English]13 Jun 2006
手册 (1)
名称/描述Modified Date
NXP® I2C-bus solutions 2014: Smart, simple solutions for the 12 most common design concerns (REV 1.0) PDF (3.5 MB) 75017540 [English]01 Aug 2014
封装信息 (1)
名称/描述Modified Date
plastic thermal enhanced very thin quad flat package; no leads; 16 terminals; body 3 x 3 x 0.85 mm (REV 1.0) PDF (201.0 kB) SOT758-1 [English]08 Feb 2016
包装 (1)
名称/描述Modified Date
HVQFN16; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or... (REV 2.0) PDF (262.0 kB) SOT758-1_118 [English]18 Apr 2013
Design Support
IBIS
订购信息
型号状态No of bitsVDD [min] (V)VDD [max] (V)Over volt tolerantNo of suppliesStandby current [typ] (µA)Max Sink Current per bit (mA)Max Sink Current, per package (mA)Source Current per bit (mA)Interrupt output pinReset input pinOutput modeInput mode: invert optionInternal pull-up resistor per bit (kOhm)I2C-bus (kHz)Footprint body and leads (mm2)Package namePackage versionOperating Temperature (Cel)No of AddressesRemark
PCA9554BS3Active82.35.5Y10.252510010YTotem poleY1004009.61HVQFN16SOT758-1-40~858
封装环保信息
产品编号封装说明Outline Version回流/波峰焊接包装产品状态部件编号订购码 (12NC)Marking化学成分RoHS / 无铅 / RHF无铅转换日期EFRIFR(FIT)MTBF(小时)MSLMSL LF
PCA9554BS3SOT758-1Reel 13" Q1/T1ActivePCA9554BS3,118 (9352 830 51118)P54PCA9554BS3Always Pb-free0.02.05E811
8-bit I2C-bus and SMBus I/O port with interrupt pca9554_pca9554a
I2C-bus specification and user manual pca9685pw
I2C-bus specification and user manual pca9685pw
I2C Demonstration Board 2005-1 Quick Start Guide pca9685pw
NXP® I2C-bus solutions 2014: Smart, simple solutions for the 12 most common design concerns pca9685pw
Expert mode sample code for 8-bit Totem Pole PCAL9554BPW
PCA9554BS3 IBIS model PCA9554BS3
plastic thermal enhanced very thin quad flat package; no leads; 16 terminals; body 3 x 3 x 0.85 mm PCF2123
HVQFN16; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or... PCF2123
PCF7900VHN