3 ms·
Most all modern rs232 ports use a similar approach to generate the negative voltages needed as well. The ubiquitous max232 and its copies/clones all use charge
by osamagirl69 6y ago
Most all modern rs232 ports use a similar approach to generate the negative voltages needed as well. The ubiquitous max232 and its copies/clones all use charge pumps to convert a +5v rail to +/-12v rails for the line drivers.
- kens 6y agoTake a look at the max233 cross-sections by @TubeTimeUS. It looks like a normal DIP integrated circuit, but it has four discrete capacitors in the IC package for the charge pumps. https://twunroll.com/article/1286136812658806785# https://twunroll.com/article/1286136812658806785#
- osamagirl69 6y agoVery cool -- I always wondered how they integrated those caps into the package