33.Interface ICs

Selection guide
Interface ICs


Selection guide




October 2009




www.st.com/interface
Interface standards
Interface ICs are a collection of standard functional blocks that provide a means
to connect logic level signals to the various voltages and current requirements
of transmission lines and buses. With this in mind a variety of Recommended
Standards [RS] have been developed.

RS-232
A single-ended serial transmission schematic is implemented by this standard.
Maximum data rate can now reach 120 kbps through 10 to 20 meter cables, with a
max load capacitance of 2500 pF. Longer cable lengths and higher data rate require
balanced connection lines.


RS-422
This standard allows only one differential way communication mode, u