As of right now, this electronic part is in a Obsolete status.Mounting is done through Surface Mount.In order for it to operate, a voltage of 5V must be applied.There are some characteristics of Counter, Internal Oscillator that it possesses.
ST16C552ACJ68 Features
ST16C552ACJ68 Applications
There are a lot of Rochester Electronics, LLC ST16C552ACJ68 UARTs applications.