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5V到3.3V转换

Other Parts Discussed in Thread: ADS1211, TXB0106

求推荐电压转换芯片,一侧电压3.3V的ARM9的spi接口,另外一侧为ADS1211的5Vspi接口,采用什么转换芯片比较合适?目前我采用的txb0106可是无法通信,spi的时钟接入txb0106后变形严重,能否推荐更好的电压转换芯片,速度尽量高!谢谢