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我们在寻找TTL转RS232的转换芯片。我这边找到的MAX3232这个芯片尺寸太大，请帮忙寻找相关物料。谢谢！
需求如下：
1． 3.3V TTL转RS232。
2． 只需要一路TX、RX转换即可。
3． 尺寸要尽可能小。
