PCA9512A/B是一款热交换I²C总线和SMBus缓冲器,允许将I/O卡插入带电背板而不会损坏数据和时钟总线并附带两个专用供电电压引脚以在保持每个电压电平最佳噪音容限的同时提供3.3 V和5 V系统之间的电平切换。任一引脚均可以2.7 V至5.5 V的供电电压供电,不限制哪个供电电压更高。控制电路会防止背板连接到卡上,直至背板上出现停止位或总线闲置且卡上没有总线冲突。当连接建立时,PCA9512A/B提供双向缓冲,保持背板和卡电容隔离。
如果VCC和VCC2同时上升,则可使用PCA9512A或PCA9512B ,但如果VCC和VCC2上升之间的间隔不同,则只应使用PCA9512B。
PCA9512A/B上升时间加速器电路允许使用更弱的DC上拉电流,同时仍满足上升时间要求。PCA9512A/B采用了一个数字输入引脚,能启用和禁用全部四个SDAn和SCLn引脚上的上升时间加速器。
插入过程中,PCA9512A/B的SDAn和SCLn引脚预充电至1 V,以最大程度减少芯片寄生电容充电所需的电流。
PCA9510A/11A/12A/12B/13A/14A I/O驱动器的递增偏移设计允许其串联或并联另一PCA9510A/11A/12A/12B/13A/14A器件以及静态偏移总线缓冲器的I²C兼容侧,但无法连接至那些总线缓冲器的静态偏移侧。
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 |
PCA9512AD | 9352 797 21118 | PCA9512AD,118 | 量产 | SO8 (SOT96-1) |
PCA9512AD | 9352 797 21112 | PCA9512AD,112 | 量产 | SO8 (SOT96-1) |
PCA9512ADP | 9352 797 19118 | PCA9512ADP,118 | 量产 | TSSOP8 (SOT505-1) |
PCA9512BD | 9352 940 04118 | PCA9512BD,118 | 量产 | SO8 (SOT96-1) |
PCA9512BDP | 9352 940 05118 | PCA9512BDP,118 | 量产 | TSSOP8 (SOT505-1) |
型号 | 订购码 (12NC) | 可订购的器件编号 | 化学成分 |
PCA9512AD | 9352 797 21118 | PCA9512AD,118 | PCA9512AD |
PCA9512AD | 9352 797 21112 | PCA9512AD,112 | PCA9512AD |
PCA9512ADP | 9352 797 19118 | PCA9512ADP,118 | PCA9512ADP |
PCA9512BD | 9352 940 04118 | PCA9512BD,118 | PCA9512BD |
PCA9512BDP | 9352 940 05118 | PCA9512BDP,118 | PCA9512BDP |
档案名称 | 标题 | 类型 | 格式 |
PCA9512 | Level shifting hot swappable I2C-bus and SMBus bus buffer | 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 PCA9512 I2C-bus extender | Application note | |
75016527 | Extend standard I2C-bus devices without worrying about offset voltages; NXP I2C-bus extender PCA9512 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 PCA9512 | 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 |