PCA9646: 经过缓冲的4通道2线总线开关

PCA9646是一款单片CMOS集成电路,适用于I²C总线、SMBus、PMBus及其他基于类似原理的系统应用中的2线总线缓冲和切换。

可按任何组合独立启用各四个输出,由可编程控制寄存器的内容决定。每个I/O的阻抗均与所有其他I/O隔离,因此允许总共五个带有最大指定负载的2线总线分支(例如,1 MHz时的Fm+ I²C总线为5 × 400 pF,或在更低频率时为5 × 4 nF)(参考1)。可串联使用多个PCA9646,提供强大的扇出能力。

类似PCA9525和PCA9605简易总线缓冲器,PCA9646附带用于时钟信号的单向缓冲器和用于数据信号的双向缓冲器。可通过可编程控制寄存器的内容设置时钟信号的方向。时钟展宽和定时必须始终由主器件控制。

PCA9646极其适合2线总线地址扩展和增加最大负载电容。超大型LED显示是完美的示例。

PCA9646: 产品结构框图
Outline 3d SOT403-1
数据手册 (1)
名称/描述Modified Date
Buffered 4-channel 2-wire bus switch (REV 2.0) PDF (162.0 kB) PCA9646 [English]17 Jun 2015
应用说明 (3)
名称/描述Modified Date
Very large I2C-bus systems and long buses (REV 1.0) PDF (216.0 kB) AN11084 [English]26 Oct 2011
Level shifting techniques in I2C-bus design (REV 1.0) PDF (52.0 kB) AN10441 [English]20 Jun 2007
PCA954X FAMILY OF I²C / SMBus MULTIPLEXERS and SWITCHES (REV 2.0) PDF (807.0 kB) AN262 [English]01 Oct 2004
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 (2)
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
Add design fl exibility with multi-channel I2C/SMBus muxes and switches; NXP® 2-, 4-, and 8-channel... (REV 1.0) PDF (641.0 kB) 75016529 [English]01 Jul 2008
封装信息 (1)
名称/描述Modified Date
plastic thin shrink small outline package; 16 leads; body width 4.4 mm (REV 1.0) PDF (300.0 kB) SOT403-1 [English]08 Feb 2016
包装 (1)
名称/描述Modified Date
TSSOP16; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or... (REV 1.0) PDF (218.0 kB) SOT403-1_118 [English]08 Apr 2013
支持信息 (1)
名称/描述Modified Date
Footprint for wave soldering (REV 1.0) PDF (16.0 kB) SSOP-TSSOP-VSO-WAVE [English]08 Oct 2009
IBIS
订购信息
型号状态
PCA9646PWActive
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
PCA9646PWSOT403-1SSOP-TSSOP-VSO-WAVEReel 13" Q1/T1ActivePCA9646PW,118 (9352 927 49118)PCA9646PCA9646PWAlways Pb-free0.05.02E811
Buffered 4-channel 2-wire bus switch pca9646d
Very large I2C-bus systems and long buses pca9601
Level shifting techniques in I2C-bus design pca9685pw
PCA954X FAMILY OF I²C / SMBus MULTIPLEXERS and SWITCHES pca9516apw
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
Add design fl exibility with multi-channel I2C/SMBus muxes and switches; NXP® 2-, 4-, and 8-channel... pca9548a
PCA9646PW IBIS Model PCA9646PW
SOT403-1 LPC812M101JDH16
SSOP-TSSOP-VSO-WAVE LPC1114FDH28
Reel 13" Q1/T1 LPC812M101JDH16
PCA9646
PCA9633