Active production — what it means for the BOM
The MAX222EWN+T: RoHS3 compliant — no exemption expiry to track on this line. The 18-SOIC wide-body package (0.295-inch, 7.50 mm width) is a common footprint that matches the industry-standard SOIC-18W land pattern.
RS-232 transceiver — what the ratings tell a repair bench
The 250 kbps data rate covers the standard RS-232 band — terminal ports, serial debug headers, and legacy peripheral links. If a board has a dead serial port and the scorch mark points here, the 500 mV receiver hysteresis gives noise immunity on long cables without external schmitt triggers. The full-duplex capability keeps TX and RX paths independent — no half-duplex turnaround delay to account for in the firmware.