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PCA9543APW,118 PCA9543APW
Configuration
1 options
Configuration
25+
Available for RFQ
Technical data
Product details
18
specifications
Core information
- Product name
- NXP PCA9543APW, 118
- Type
- NXP
- Minimum package
- 2500 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- NXP
- Electronic Component
- PCA9543APW,118
- Electronic Component
- 1
- Package
- TSSOP-14
- Electronic Component
- Other Interface
- Electronic Component
- 0.001g
- Electronic Component
- 1
- Features
- positions
- Electronic Component
- BM0257165783
- Operating Temperature
- 40℃~+85℃
- Operating Voltage
- 2.3V~5.5V
- Interface Type
- I2C
- Electronic Component
- Electronic Component
- Electronic Component
- 2500
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
PCA9543APW,118 产品概述
一、产品简介
PCA9543APW,118 是恩智浦（NXP）推出的一款双通道 I²C 总线多路复用器，采用 14 引脚 TSSOP 封装。器件工作电压范围宽（2.3V 至 5.5V），工业级工作温度（-40℃ ～ +85℃），适用于需要在同一主控制器下管理多路 I²C 从设备或隔离冲突地址设备的嵌入式系统与消费类电子产品。
二、主要功能与特性
- 双通道 I²C 路由：在一个物理 I²C 总线与最多两个从属总线之间进行选择和隔离，避免地址冲突或提供独立的总线拓扑。
- 兼容 I²C 协议：对上游主机透明，可在不改变从设备固件的情况下进行总线切换与管理。
- 宽电压工作：支持 2.3V 至 5.5V 电源，使其能与各种逻辑电平的主控芯片配合使用。
- 工业温度等级：工作温度覆盖 -40℃ 至 +85℃，满足工业级应用的可靠性需求。
- 紧凑封装：TSSOP-14 封装利于密集布局的 PCB 设计。
三、典型应用场景
- 同一主控下管理具有相同 I²C 从地址的多个传感器或 EEPROM。
- 系统设计需要分段隔离 I²C 器件以降低总线电容或噪声影响时。
- 多路传感器采集平台、嵌入式控制器、工业自动化终端、可穿戴设备与测试与测量设备等。
四、设计与使用建议
- 上拉电阻：I²C 总线需要外部上拉电阻。为保证信号完整性与总线速度，应根据总线电容和目标通信速率选择合适阻值（常见取值 1kΩ–10kΩ 范围内调整）。
- 电源与地：器件对电源噪声敏感，建议在 VCC 旁并联去耦电容，短走线连接地平面以降低干扰。
- 通道切换：在切换通道前后注意主设备与下游器件的状态同步，避免在事务中途切换导致总线冲突或数据丢失。
- 布局建议：将多路复用器靠近主控器或信号源放置，尽量缩短主线上行与下行走线，分支线可适度分散以降低耦合与回路面积。
五、选型与替代考量
若系统需要更多通道或更高集成度，可考虑多通道多路复用器或带有地址引脚/寄存器控制的同类器件。选择时应关注电源电压兼容性、工作温度、封装形式及对 I²C 速度模式的支持，以确保与现有平台兼容。
总结：PCA9543APW,118 以其双通道隔离能力、宽电压与工业温度特性，适合用于扩展 I²C 设备数量、解决地址冲突并改善总线管理的场景。针对具体系统，合理配置上拉阻值、布局与电源滤波能显著提升总线稳定性与可靠性。
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