1.4 MOS tube achieve the four road 3 v and 5 v level bidirectional conversion,

2.Power input tape counter-attack joint protection, integrated 3.3 VLDO, and can provide is not more than 150 ma current

3.With power light, work or not be clear at a glance

4.Can realize UART, IIC, 1 - wire, SPI bus signals such as bidirectional conversion

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