PCA9522 带有热插入逻辑的快速双路双向总线缓冲器
PCA9522是一款单片双极集成电路，适用于I²C总线、SMBus等应用中的总线缓冲。附带用于检测停止和闲置状况的热插入逻辑，使其非常适合背板上的带电插入。缓冲器通过同时缓冲SCL和SDA线路以扩展总线负载。PCA9522直接取代IES5502，仅最大总线电压从15 V降为10 V。
热插入逻辑允许将IC插入带电背板中而不会导致总线上的数据损坏。开集就绪信号(RDY)表示连接建立的时间。背板端口预充电会最大程度减少热插入过程中的总线干扰。
使能功能允许隔离部分总线。可使系统的独立部件连续上线。支持1.8 V至10 V的大范围总线电压之间的总线电平变换。这些功能在连接不同技术、工作速度和负载的系统时提供极大的灵活性。
PCA9522的独特操作提供一种此类双向缓冲器的最快响应时间。它进行此操作无需“上升时间加速器”，而“上升时间加速器”与低噪音容限结合，可能使瞬时故障超出I²C总线规格。
产品特点 Features
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应用
产品实物图
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封装
| 型号 | 可订购的器件编号 | 订购码 (12NC) | 产品状态 | 封装 |
| PCA9522D | 9352 924 35118 | PCA9522D,118 | 量产 | SO8 (SOT96-1) |
| PCA9522DP | 9352 924 36118 | PCA9522DP,118 | 量产 | TSSOP8 (SOT505-1) |
订货和供应
| 型号 | 订购码 (12NC) | 可订购的器件编号 | 化学成分 |
| PCA9522D | 9352 924 35118 | PCA9522D,118 | PCA9522D |
| PCA9522DP | 9352 924 36118 | PCA9522DP,118 | PCA9522DP |
PCA9522 技术支持
| 档案名称 | 标题 | 类型 | 格式 |
| PCA9522 | Fast dual bidirectional bus buffer with hot insertion logic | 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 PCA9522 I2C-bus extender | Application note | |
| 75016527 | Extend standard I2C-bus devices without worrying about offset voltages; NXP I2C-bus extender PCA9522 in a proven application | Brochure | |
| 75016532 | Extend the I2C-bus with advanced repeaters and hubs; NXP 2-channel I2C-bus repeaters PCA9522x 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 PCA9522 | 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 |
