IDT, Microcontrollers, models:

5L2503	User Manual
5P49V6965	Register Descriptions And Programming Manual
MicroClock 5x2503 Series	User Manual
Microclock 5L1503 Series	User Manual
Microclock 5X1503 Series	User Manual
SDAH01	User Manual
VersaClock 6E Series	Register Descriptions And Programming Manual
ZWIR4512	Getting Started Manual