WMSIC Electronic Components

MICROCHIP USB2422T/MJ USB2422T

ModelUSB2422T/MJ
PackageQFN-24-EP(4x4)
BrandMICROCHIP
Price Price on request Electronic component prices change quickly with market supply and demand. Please refer to the latest WMSIC quotation for current pricing.
Configuration
1 options
Configuration 23+

Available for RFQ

Technical data

Product details

19 specifications

Core information

Product name
MICROCHIP USB2422T / MJ
Type
MICROCHIP
Minimum package
5000 个

Technical parameters

Electronic Component
Electronic Component
Electronic Component
MICROCHIP
Electronic Component
USB2422T/MJ
Electronic Component
1
Package
QFN-24-EP(4x4)
Type
Electronic Component
Electronic Component
USB Hub
Electronic Component
0.07g
Electronic Component
1
Channel Count
2
Features
Regulator; Power Supply Switch; ESD; Power Supply Switch;; BC1.1
Electronic Component
BM0228687299
Operating Voltage
3.3V
USB
USB 2.0
Electronic Component
Electronic Component
Electronic Component
5000

For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.

USB2422T/MJ 产品概述

一、产品简介

USB2422T/MJ 是 Microchip(美国微芯)出品的一款小型 USB 集线器控制器,面向嵌入式系统中对两路下游端口的 USB 拓展需求。器件遵循 USB 2.0 规范,工作电压 3.3V,封装为 QFN-24-EP(4×4),集成了集线器控制逻辑,适合空间受限且需稳定 USB 连接管理的应用场景。

二、主要特性

  • 类型:USB 集线器控制器(Hub)。
  • USB 协议版本:兼容 USB 2.0 规范,向下兼容低速/全速设备;在具体拓扑中可支持 USB 2.0 的高/全/低速互通(以器件资料为准)。
  • 工作电压:3.3V 单电源供电。
  • 通道数:2 个下游端口(两路扩展)。
  • 封装:QFN-24-EP(4×4),适合紧凑 PCB 布局与热量散逸。
  • 集成度高,减少外部元件数量,便于快速实现 USB 集线器功能。

三、电气与封装参数

USB2422T/MJ 在 3.3V 电源下工作,需注意电源去耦与稳压设计以保证信号完整性。QFN-24-EP 封装带裸露焊盘,既有利于热量传导也便于地连接,焊盘设计应参考厂方封装图纸以确保焊接可靠性。关于信号端口的静电保护、差分线对长度匹配和阻抗控制,应按 USB 2.0 的高速信号布局规范执行。

四、设计与使用建议

  • 电源:为保证稳定,建议在器件电源引脚附近放置 0.1μF 和 1μF 的并联去耦电容,并在入口处加 LC 或 Ferrite 以抑制噪声。若系统为总线供电或自供电,需根据负载计算总电流并考虑端口电流限制方案。
  • PCB 布局:USB 的差分对(D+/D-)应保持恒定阻抗(通常 90Ω 差分),差分对尽量短且避免与高速信号交叉。上游与下游线缆接口处宜预留 ESD 抑制器(TVS)。
  • 时钟与配置:参考数据手册确认是否需要外部晶振或时钟源,以及是否需要通过寄存器配置端口电源控制、过流检测等功能。
  • 热管理与焊接:QFN-EP 中央焊盘须确保与地平面充分焊接以利散热,过孔布局需与工艺匹配,避免焊接缺陷。

五、典型应用场景

  • 工业控制终端、仪器仪表:在有限空间内为多路 USB 设备提供可靠连接和管理。
  • 嵌入式设备与单板计算机:扩展外设接口,如键盘、鼠标、存储设备等。
  • 医疗设备、收银系统与信息亭:对接多种 USB 外设且对稳定性与 EMI 要求高的应用。

六、采购与支持

欲获取完整电气参数、引脚分配、寄存器描述与评估板资料,请参考 Microchip 官方数据手册与应用笔记。若需更多端口或特殊功能(如电流检测、电源开关集成等),可咨询厂商推荐的同系列或替代型号,并获取参考设计与布局指导。

注:本文为基于器件基本参数的工程概述,具体设计请以 Microchip 官方数据手册与参考设计为准。

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