PCA9519: 4通道电平变换I²;C总线/SMBus转发器

PCA9519是一款4通道电平变换I²C总线/SMBus转发器,能使处理器低电压2线串行总线连接标准I²C总线或SMBus I/O。在电平切换过程中保留I²C总线系统所有工作模式和功能的同时,它还允许通过为数据(SDA)和时钟(SCL)线路提供双向缓冲来扩展I²C总线,从而使I2C总线或SMBus在高电压侧的最大电容达到400 pF。SDA和SCL引脚为耐过压且在PCA9519未通电时为高阻抗。

端口B驱动器兼容SMBus I/O电平,而端口A使用电流感应机制检测输入或输出低电平信号,以防止总线锁定。端口A使用1 mA上拉电流源和200 Ω下拉驱动器。这使端口A上的低电平适应更小的电压摆幅。端口A内部缓冲器上的输出下拉低电平设为大约0.2 V,而内部缓冲器的输入阈值设为比输出电压低电平的低大约50 mV。当端口A I/O内部驱动为低电平时,输入端不会将低电平识别为低电平。这能防止发生锁定状况。端口B上的输出下拉驱动真正的低电平且输入电平设为大约SMBus或I²C总线电压电平的0.3,能使端口B连接至任何其他I²C总线器件或缓冲器。

除非VCC(A)高于0.8 V且VCC(B)高于2.5 V,否则不会启用PCA9519驱动器。也可使用使能(EN)引脚在系统控制下打开和关闭驱动器。应该注意,当总线闲置时仅改变EN引脚的状态。

0 Hz至400 kHz时钟频率

备注:最大系统工作频率可能因转发器添加的延迟而小于400 kHz。
PCA9519: 产品结构框图
PCA9519: 应用结构框图
Outline 3d SOT616-1
数据手册 (1)
名称/描述Modified Date
4-channel level translating I2C-bus/SMBus repeater (REV 3.0) PDF (178.0 kB) PCA9519 [English]10 Jan 2013
应用说明 (2)
名称/描述Modified Date
Level shifting techniques in I2C-bus design (REV 1.0) PDF (52.0 kB) AN10441 [English]20 Jun 2007
I2C / SMBus Repeaters, Hubs and Expanders (REV 2.0) PDF (1.0 MB) AN255 [English]19 Dec 2002
用户指南 (4)
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
PCA9600 demonstration board OM6293 (REV 1.0) PDF (130.0 kB) UM10323 [English]15 Dec 2008
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
Extend the I2C-bus with advanced repeaters and hubs; NXP® 2-channel I2C-bus repeaters PCA9515x and... (REV 1.0) PDF (740.0 kB) 75016532 [English]01 Jul 2008
封装信息 (2)
名称/描述Modified Date
plastic thin shrink small outline package; 20 leads; body width 4.4 mm (REV 1.0) PDF (304.0 kB) SOT360-1 [English]08 Feb 2016
plastic thermal enhanced very thin quad flat package; no leads; 24 terminals; body 4 x 4 x 0.85 mm (REV 1.0) PDF (202.0 kB) SOT616-1 [English]08 Feb 2016
包装 (2)
名称/描述Modified Date
HVQFN24; reel pack; standard product orientation; 12NC ending 118 (REV 1.0) PDF (196.0 kB) SOT616-1_118 [English]16 Jan 2014
TSSOP20; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or... (REV 4.0) PDF (225.0 kB) SOT360-1_118 [English]15 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
PCA9519BSActive
PCA9519PWActive
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
PCA9519BSSOT616-1Reel 13" Q1/T1ActivePCA9519BS,118 (9352 812 52118)9519PCA9519BSAlways Pb-free0.02.05E811
PCA9519PWSOT360-1SSOP-TSSOP-VSO-WAVEReel 13" Q1/T1ActivePCA9519PW,118 (9352 812 53118)PA9519PCA9519PWAlways Pb-free0.02.05E811
Bulk PackDiscontinuedPCA9519PW,112 (9352 812 53112)PA9519PCA9519PWAlways Pb-free0.02.05E811
4-channel level translating I2C-bus/SMBus repeater pca9519bs
Level shifting techniques in I2C-bus design pca9685pw
I2C / SMBus Repeaters, Hubs and Expanders pca9600
I2C-bus specification and user manual pca9685pw
I2C-bus specification and user manual pca9685pw
PCA9600 demonstration board OM6293 pca9600
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
Extend the I2C-bus with advanced repeaters and hubs; NXP® 2-channel I2C-bus repeaters PCA9515x and... pca9600
PCA9519 IBIS model PCA9519BS
plastic thermal enhanced very thin quad flat package; no leads; 24 terminals; body 4 x 4 x 0.85 mm TFF1007HN
HVQFN24; reel pack; standard product orientation; 12NC ending 118 TFF1007HN
SOT360-1 LPC1112FDH20
SSOP-TSSOP-VSO-WAVE LPC1114FDH28
Reel 13" Q1/T1 LPC824M201JDH20
PCA9519BS
PCA9519BS
TFF11152HN
PCA9634