: Many versions, like the SP3232E, offer enhanced Electrostatic Discharge (ESD) protection (up to ±15kV), which is vital if the RS-232 port is exposed to frequent plugging and unplugging by users.
SP3232EHEY-L/TR - MaxLinear - SP3232EH Series 460 Kbps 3.3 V RS-232 SMT Transceiver - TSSOP-16 sp3232 vs max3232