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PCA9538BS,118 PCA9538BS
Configuration
1 options
Configuration
24+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- NXP PCA9538BS, 118
- Type
- NXP
- Minimum package
- 6000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- NXP
- Electronic Component
- PCA9538BS,118
- Electronic Component
- 1
- Package
- HVQFN-16-EP(4x4)
- Electronic Component
- I / O Expander
- Electronic Component
- 0.36g
- Electronic Component
- 1
- I / O
- 8
- Features
- positions; and
- Electronic Component
- BM0265968511
- Operating Temperature
- 40℃~+85℃
- Operating Voltage
- 2.3V~5.5V
- Interface Type
- I2C；SMBus
- Current(IOL)
- 24mA
- Clock Frequency(fc)
- 400kHz
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
PCA9538BS,118 8位I²C/SMBus I/O扩展器产品概述
一、产品定位与核心功能
PCA9538BS,118是恩智浦（NXP）推出的8位通用I/O扩展器，专为解决微控制器（MCU）/微处理器（MPU）I/O端口资源不足的问题设计。通过I²C/SMBus接口与主机通信，可在不增加系统硬件复杂度的前提下，为各类电子系统扩展8个独立的输入/输出通道，同时支持多设备级联和中断主动通知，平衡了功能扩展性与低功耗需求，适配消费电子、工业控制、物联网等多场景。
二、通信接口与级联能力
该器件兼容I²C和SMBus协议，支持最高400kHz的快速模式通信，满足中速数据传输需求；通过硬件地址引脚配置，最多可支持4个设备级联，无需额外增加通信总线负载，即可将系统I/O扩展至32个（4×8），适合多路传感器采集、多通道LED驱动等需要大量I/O的场景。
三、关键电气性能参数解析
- 宽电压与低功耗：工作电压范围覆盖2.3V~5.5V，兼容3.3V和5V逻辑系统；静态电流仅1μA，待机状态下功耗极低，适合电池供电的便携设备（如智能手环、无线传感器节点）。
- 强驱动能力：每个I/O通道支持最大24mA灌电流，可直接驱动小型继电器、LED指示灯等负载，无需额外添加驱动电路，简化系统设计。
- 稳定逻辑电平：输出高电平（VOH）典型值4.1V，输出低电平（VOL）最大值400mV，与主流MCU/MPU的逻辑电平完全匹配，避免信号干扰或误触发。
- 工业级温度范围：工作温度支持**-40℃~+85℃**，可适应 harsh环境（如工业现场、户外监测设备）。
四、中断输出与I/O灵活性
器件内置中断输出引脚，当任意I/O通道的输入状态发生变化时，会主动向主机触发中断，无需主机持续轮询I/O寄存器，显著降低主机的资源占用率，提升系统响应速度。此外，每个I/O通道可独立配置为输入或输出模式，支持软件上拉电阻使能，满足不同场景下的信号采集或控制需求。
五、封装与典型应用
采用16-HVQFN（4×4mm） 小封装，体积紧凑，适合高密度PCB布局（如智能手机、智能家电的主板）。典型应用场景包括：
- 消费电子：智能家居设备（如智能灯控、传感器Hub）、智能穿戴（如智能手表的辅助I/O扩展）；
- 工业控制：小型PLC的I/O扩展、传感器节点的多路信号采集；
- 物联网设备：低功耗无线模块的I/O扩展（如LoRa节点的多路开关控制）；
- 汽车电子（辅助级）：车载小屏的按键扩展、车内传感器接口。
该器件凭借高集成度、低功耗、强驱动能力等特点，成为系统I/O扩展的高性价比选择，适配多类电子系统的升级需求。
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