step down level shifter

127

02:15:28

conversion of 5v dc to 3.3 v dc
it just use an 1:2 ratio of resistors

published 9 years ago

BillyT

9 years ago

There is no usable output current.

hurz

9 years ago

Billy, this is working fine for a unidirectional way. Mos inputs are voltage controled, so no need for higher current then this.

hurz

9 years ago

BTW, the most simple way to connect two different digital domains is just a resistor. ESD protection clamps the to high voltage and 3.3V is much enough to indicate high logic level backwards.

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