There is a cost-effective package 48-TQFP available.Transmissions are made using 1, UART channels.As for packaging, Tray is chosen.At present, this electronic part has a status of Obsolete.You can mount it by using Surface Mount.There is 2.97V~5.5V supply voltage for it.Several characteristics of Timer/Counter are present in it.
ST16C450IQ48-F Features
ST16C450IQ48-F Applications
There are a lot of MaxLinear, Inc. ST16C450IQ48-F UARTs applications.