Transmissions are made using 2 channels.At present, this electronic part has a status of Obsolete.You can mount it by using Surface Mount.There is 5V supply voltage for it.Several characteristics of Counter, Internal Oscillator are present in it.
XR16L2550IJ Features
XR16L2550IJ Applications
There are a lot of Rochester Electronics, LLC XR16L2550IJ UARTs applications.