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PCA9506DGG,518 PCA9506DGG
Configuration
1 options
Configuration
25+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- NXP PCA9506DGG, 518
- Type
- NXP
- Minimum package
- 2000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- NXP
- Electronic Component
- PCA9506DGG,518
- Electronic Component
- 1
- Package
- 56-TSSOP
- Electronic Component
- I / O Expander
- Electronic Component
- 0.46g
- Electronic Component
- 1
- I / O
- 40
- Features
- Built-in LEDDriver; positions; and
- Electronic Component
- BM0262567557
- Operating Temperature
- 40℃~+85℃
- Operating Voltage
- 2.3V~5.5V
- Interface Type
- I2C
- Output Type
- Electronic Component
- Current(IOH)
- 10mA
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
PCA9506DGG,518 产品概述
一、核心特性
PCA9506DGG,518 为恩智浦（NXP）出品的 I²C 总线 40 路 I/O 扩展器，封装为 56‑TSSOP。器件支持 400 kHz 快速模式 I²C，最高可在同一总线上级联或通过地址引脚扩展至 8 个设备。工作电压范围宽（2.3 V 至 5.5 V），工作温度覆盖工业级 -40 ℃ 至 +85 ℃。器件静态电流极低，仅 750 nA，适合低功耗系统。每路为推挽式输出，单路下拉（IOL）可达 15 mA，上拉（IOH）可达 10 mA，并提供中断输出和复位功能；此外集成 LED 驱动特性，方便直接驱动指示灯或小功率 LED 阵列。
二、功能亮点与典型应用
- 内置 LED 驱动：可直接驱动指示灯或状态灯，简化外围电路设计（建议配合限流电阻与功耗评估）。
- 中断输出：当输入状态变化或配置条件触发时，器件通过推挽中断信号通知主控，利于低功耗唤醒与事件驱动设计。
- 级联与地址扩展：最多支持 8 个器件同一 I²C 总线通讯，适合需大量 GPIO 的终端或工业控制系统。
典型应用包括：工业控制与仪表、键盘扫描、LED 指示与背光驱动、物联网节点与嵌入式外设扩展、消费类产品的 GPIO 扩展。
三、设计与电气建议
- I²C 拉电阻：400 kHz 下建议 2.2 kΩ–4.7 kΩ（视总线容量与上拉电源而定），以保证时序与上升沿性能。
- 电源与旁路：VCC 旁路 0.1 μF 陶瓷电容靠近封装引脚，减少瞬态噪声。
- LED 驱动与输出限流：尽管单路 IOL/IOH 能满足小功率 LED，仍应使用限流电阻并注意总包功率与 PCB 散热，避免长期大电流工作超出器件热限制。
- 中断与复位：中断为推挽输出，可直接拉至 MCU GPIO；复位引脚用于外部复位控制，建议在复位后给予适当初始化延时。
四、封装与 PCB 注意事项
56‑TSSOP 小型化封装适合空间受限应用，布线时注意：保持 VCC/GND 平面完整，I²C 信号线尽量短且避免长并行走线；若多器件并联，地址引脚和中断线布线需清晰标识以便调试。热管理上应根据系统总电流估算封装功耗并设计合适铜箔面积。
五、快速上手要点
- 将 VCC 和 GND 连接并添加旁路电容；
- SDA/SCL 加合适拉电阻并连接主控；
- 配置地址引脚以保证每个设备地址唯一；
- 通过 I²C 初始化寄存器，设置方向、输出状态与 LED 驱动参数；
- 使用中断线实现事件通知以降低主控轮询开销。
总结：PCA9506DGG,518 提供高集成度的 40 路 I/O 扩展、低静态功耗与工业级电压/温度范围，适合对 GPIO 数量、功耗与可靠性有较高要求的嵌入式与工业应用。在设计时注意电流限流、总线上拉与热管理，可实现稳定可靠的外设扩展解决方案。
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