DM74163 Synchronous 4-Bit Counters(???4??????)
DM74163A SYNCHRONOUS 4-BIT COUNTERS
DM74163AJ/A+ Synchronous Up Counter
DM74163AN SYNCHRONOUS 4-BIT COUNTERS
DM74163AN/A+ Synchronous Up Counter
DM74163AN/B+ Synchronous Up Counter
DM74163N Synchronous 4-Bit Counters
DM74163N/A+ Synchronous Up Counter
DM74163N/B+ Synchronous Up Counter