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PCA9547PW,118 PCA9547PW
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- NXP PCA9547PW, 118
- Type
- NXP
- Minimum package
- 2500 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- NXP
- Electronic Component
- PCA9547PW,118
- Electronic Component
- 1
- Package
- TSSOP-24
- Type
- Multiplexer
- Electronic Component
- Signal Switch / Codec / Multiplexer
- Electronic Component
- 0.137g
- Electronic Component
- 1
- Features
- Level Conversion
- Electronic Component
- BM0242331606
- Operating Temperature
- 40℃~+85℃
- Operating Voltage
- 2.3V~5.5V
- Power Supply
- Power Supply
- Current(IOL)
- 6mA
- Static Current(Iq)
- 2uA
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
PCA9547PW,118 产品概述
一、产品概览
PCA9547PW 是恩智浦（NXP）推出的一款 I²C/SMBus 多路复用器（1-to-8 通道），封装为 TSSOP-24（型号后缀 PW）。该器件用于在单一主控总线上选择不同的从属总线，解决从机地址冲突、降低总线电容限制并实现总线隔离。支持单电源供电，适配各种低压嵌入式系统。
二、主要特性
- 工作电压：2.3 V ～ 5.5 V，适用于 3.3 V 与 5 V 系统。
- 极低静态电流：Iq ≈ 2 µA（节省功耗，适合电池供电设备）。
- 输出拉低能力（IOL）：6 mA，满足常见总线负载驱动需求。
- 传播延迟：tpd = 0.31 ns（@5.5 V, Cb = 50 pF，典型值）。
- 工作温度范围：-40 ℃ ～ +85 ℃，适合工业级环境。
- 封装：TSSOP-24，适合 PCB 空间受限的应用。
- 控制方式：通过 I²C 总线写入控制寄存器选择通道（支持通道使能/禁用），实现主从总线的透明切换与隔离。
三、功能说明
PCA9547 通过内部开关将上游（主）总线与最多八个下游（分支）总线之一相连。每个下游分支在未被选中时与上游完全隔离，避免信号冲突与电容累积。器件支持在 I²C 总线上通过控制字节直接选择目标通道，部分实现多通路快速切换和热插拔保护。低静态电流与广泛的工作电压使其可用于低功耗与多源电压系统。
四、典型应用场景
- 多传感器系统：同一主控通过复用器访问多个地址相同或分布在不同位置的传感器。
- 工业控制与测试设备：隔离不同测量通路，避免信号相互干扰。
- 通信与消费电子：扩展 I²C 设备数量，简化线路布局。
- 电池供电与便携设备：得益于低 Iq，适合对待机功耗敏感的产品。
五、封装与订购提示
- 型号说明：PCA9547PW 表示 TSSOP-24 封装，后缀 “,118” 通常指厂家卷带（Tape & Reel）包装规格，便于自动贴装生产。
- 设计建议：在布局时为 SDA/SCL 添加合适的上拉电阻，修正总线终端与分支电容，确保开关切换后的总线完整性与时序满足系统要求。
- 温度与电源预留裕量，特别在 5.5 V 边界与高温工作下，确保器件可靠性。
PCA9547PW 以其低功耗、宽电压范围与多通道复用能力，适合需要扩展或分离 I²C 总线的各类嵌入式与工业应用。若需更详细的管脚分配、时序图与寄存器定义，请参考 NXP 官方数据手册。
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