Transmissions are made using 4 channels.The current status of this electronic part is Obsolete.You can mount it by using Surface Mount.With a supply voltage of 3.3V, it operates.A few characteristics of Counter, Internal Oscillator can be found in it.
XR16V654IJ Features
XR16V654IJ Applications
There are a lot of Rochester Electronics, LLC XR16V654IJ UARTs applications.