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Usart level shifting 3.3v to 1.8v

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Rocketman46

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Hi All,

What is the preferred easiest way to drop 3.3v usart pins to 1.8v to interface to an external device. I cannot change the Micro Vin voltage, so I will have to lower the voltage level external.

Is it acceptable to use two resistors and create a potential divider, or would you recommend another method. I have already built the board and this was an over site.

Thanks,
 

hi,
I use a resistive divider [ 1k8 & 3k3] for 5V down to 3.3v for logic levels, works OK.
E
 
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