What is the MAX232EING4?
It integrates two drivers and two receivers, handling data rates up to 250 kbps over a single 5V supply rail.
Supply voltage and 3.3V compatibility
It is not designed for 3.3V logic systems — the charge-pump architecture needs the 5V rail to generate the ±10V RS-232 output levels. If your design runs on 3.3V only, look at a low-voltage RS-232 transceiver such as the MAX3232 family instead.
Data rate and receiver hysteresis
Rated at 250 kbps, this transceiver covers standard UART speeds up to 115.2 kbps with margin.
The supplier device package is 16-PDIP.