In the PLCC package, you can get the product at a low cost.An IC with 44 pins is what this device is.In its configuration, it is designed around the 44 pins.
SC16C750BIA44/G:51 Features
SC16C750BIA44/G:51 Applications
There are a lot of NXP Semiconductors / Freescale SC16C750BIA44/G:51 UARTs applications.