Full-speed USB 2.0 is the standout peripheral here. On an 8-bit PIC running at 48 MHz, the USB module handles the protocol timing in hardware, so the core isn't burdened with bit-banging. This lets the PIC18F45K50-I/P serve as a USB-to-serial bridge, a HID-class device, or a simple data-logger endpoint without requiring a separate USB controller IC. The 2 KB RAM is tight for bulk endpoints, but for control-transfer and interrupt-transfer profiles it works within the memory budget. Designs that need a USB-capable MCU in a through-hole package have few alternatives at this price tier.
For a procurement decision, this removes the obsolescence risk that haunts many 8-bit MCU lines. The part is ROHS3 compliant. If you're qualifying a BOM for a multi-year production run, this is a safe anchor — no need to stockpile or hunt for a second source today.
Through-hole 40-DIP — board-level fit and handling
The 40-pin DIP package (0.600" body width, 15.24 mm row spacing) is a through-hole footprint. It plugs into standard DIP sockets or solders directly into plated through-holes on a PCB. No reflow profile needed — hand-soldering or wave-solder is fine. The PDIP body is robust for manual assembly and field replacement. Store the tubes in a dry environment anyway if the seal is broken.