binary up/down counter the sn54/74ls192 is an up/down bcd decade (8421) counter and the sn54/74ls193 is an up/down modulo-16 binary counter . separate count up and count down clocks are used and in either counting mode the circuits opera...
binary Counters
August 1986 Revised March 2000
DM74LS90 decade and binary Counters
General Description
Each of these monolithic counters contains four masterslave flip-flops and additional gating to provide a divide-bytwo counter an...