The Motorola part is an engineering sample / prototype (devices numbered XC rather than MC are prototypes). The device you have is a microcontroller with onboard EPROM (the window is for erasing that eprom), and is no longer even referenced on the Freescale website (which is what Motorola SPS was until it was spun off). I would guess it was dropped a long time ago - the entire non-HC family was end-of-lifed or given planned obsolescence a long time ago except for some part being used in high volume in legacy applications.
Can't help (right now) on the other part.
Cheers
PeteS