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PCAL6408ABSHP
Configuration
1 options
Configuration
24+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- NXP PCAL6408ABSHP
- Type
- NXP
- Minimum package
- 6000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- NXP
- Electronic Component
- PCAL6408ABSHP
- Electronic Component
- 1
- Package
- HVQFN-16-EP(3x3)
- Electronic Component
- I / O Expander
- Electronic Component
- 0.001g
- Electronic Component
- 1
- I / O
- 8
- Features
- Built-in LEDDriver; positions; and; IOLevel
- Electronic Component
- BM0255903169
- Operating Temperature
- 40℃~+85℃
- Operating Voltage
- 1.65V~5.5V
- Interface Type
- I2C；SMBus
- Current(IOH)
- 25mA
- Current(IOL)
- 25mA
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
PCAL6408ABSHP 概述
PCAL6408ABSHP 是恩智浦（NXP）的一款高集成度 8 位 I²C/SMBus I/O 扩展器，封装为 HVQFN-16-EP (3×3mm)，适用于对 MCU GPIO 受限或需远端采集/驱动的场景。器件支持最高 400 kHz 的 I²C/SMBus 时钟，工作电源范围宽（1.65 V ~ 5.5 V），工作温度范围 -40 ℃ ~ +85 ℃，静态电流极低，仅约 1 μA，适合低功耗设计与电池供电产品。
一、主要规格亮点
- 接口类型：I²C / SMBus，最高时钟频率 fc = 400 kHz。
- I/O 数量：8 位通用可编程 I/O。
- 输出类型：支持推挽式与开漏输出配置，灵活适配负载与系统拓扑。
- 中断输出：具备中断输出，可在输入变化时通知主控，减少轮询。
- 驱动能力：灌电流 IOL = 25 mA，拉电流 IOH = 25 mA（单脚负载能力需参考实际布局及功耗）。
- 工作电压：1.65 V ~ 5.5 V，方便与不同电平的主控直接接口。
- 支持设备数量：可在总线上配置 2 个器件地址（根据地址引脚设置）。
- 封装：HVQFN-16-EP（3×3 mm），适合空间受限应用。
二、典型应用场景
- MCU/MPU GPIO 扩展：用于按键矩阵、状态信号采集、外设开关控制等。
- LED 驱动与指示灯控制：适用于低至中等电流指示灯（注意单脚 25 mA 限制）。
- 电源与系统管理：与温度、充电、背光等模块结合，通过中断实现事件驱动。
- 工业与消费类产品：智能家居、可穿戴设备、仪表与无线终端等。
三、设计与使用建议
- 电源解耦：靠近芯片 VDD 布置 0.1 μF 陶瓷电容及必要的横向滤波，保证总线与 I/O 稳定。
- I²C 拉升：SDA/SCL 需要外部上拉电阻，阻值与系统电压、总线容量和所需上升时间相关。器件支持 1.65 V 起电压，若与不同电平主控共存，通常无需电平移位器，但需注意上拉与总线容性。
- 中断接法：中断引脚可连接至 MCU 中断输入，建议外接合适上拉/下拉并配置滤抖，防止毛刺触发。
- 输出与负载：单脚最大 25 mA，但应避免所有通道同时高电流输出以限制总耗散和热应力。HVQFN 有底部敷铜焊盘（EP），需将其与地相连并做热孔散热。
- 地址配置：通过器件的地址引脚设定最多 2 个不同地址，可在同一 I²C 总线上并联最多两只该型号器件。
四、优势总结
PCAL6408ABSHP 提供了小体积、高电平兼容性与低静态功耗的平衡方案。它适合空间受限、功耗敏感且需可靠中断响应的系统。灵活的输出类型与合理的驱动能力，使其在消费、工业和便携式产品设计中都具有良好适配性。
如需进一步的电气特性曲线、引脚定义或寄存器表，请参考恩智浦官方 Datasheet 以完成硬件和固件设计验证。
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