MAX232 vs TRS202EC Line Drivers
The TRS202 uses smaller capacitors. I guess that the switching frequency is higher for the switched capacitors. With the capacitors it doubles the +5V to +10V and then makes it negative to -10V. For the MAX232 you need 1uF capacitors and for the TRS202 you need 0.1uF capacitors (but 1uF is also ok. max 10uF). Both are pin compatible, but keep the value of the capacitors in mind. The TRS202 is based on the MAX202.