TS3A225EYFFR

TS3A225E是一个音频头戴式耳机开关器件。此器件可检测模拟麦克风是否存在，并在音频立体声插孔中的不同接头之间切换系统模拟麦克风引脚。立体声接头中的麦克风连接可与接地连接互换，具体取决于制造商。当TS3A225E检测到一个特定配置时，器件会自动将麦克风线路连接到适当的引脚。此器件还报告音频立体声插孔上插入的模拟麦克风。 在某些系统中，需要将立体声插孔引脚接地。TS3A225E提供用于接地短路的两个内部低电阻(<100mΩ) FET开关。

TS3A225E is an audio headset switch device that detects the existence and polarity of a microphone connected to a headset. Upon detection of a microphone the TS3A225E automatically connects a system analog microphone pin to the appropriate audio jack connection. The device also routes the system microphone GND to the proper jack connection. The detection sequence is initiated via I²C command or the external trigger detection (DET_TRIGGER) pin. The automatic routing feature can be disabled by I²C command. Additionally, all the switches of TS3A225E can be manually controlled by I²C register. The TS3A225E detects whether or not a microphone is present on an inserted audio stereo jack. If a microphone is detected, the TS3A225E pulls the /MIC_PRESENT pin low and also indicates the presence of the microphone in an I²C register. The /MIC_PRESENT connection is an open - drain output with a maximum on resistance of 25 Ω. This makes the /MIC_PRESENT pin compatible with HDA standards. The /MIC_PRESENT pin can also be used as an interrupt flag in I2S based systems.

• VDD范围 = 2.78至4.5V
• 打开立体声插孔开关前断开
• 针对接地场效应晶体管(FET)开关的Ron：晶圆级芯片封装(WCSP)：70mΩ；四方扁平无引线(QFN)封装：100mΩ
• GND和麦克风连接的自主检测
• 由I²C或外部触发引脚触发的检测
• HDA兼容麦克风插入指示器
• 1.8V兼容I²C开关控制
• 静电放电(ESD)性能测试符合JESD 22标准：
  • 2000V人体模型（A114 - B，II类）
  • 500V充电器件模型(C101)
• ESD性能(SLEEVE，RING2，TIP)：±8kV接触放电(IEC 61000 - 4 - 2)

• 手机/平板电脑
• 笔记本电脑