MM74C192 • MM74C193 Synchronous 4-Bit Up/Down Decade Counter • Synchronous 4-Bit Up/Down Binary Counter
January 1991 Revised October 1999
MM74C192 • MM74C193
Synchronous 4-Bit Up/Down Decade Counter • Synchronous 4-Bit Up/Down Binary Counter
General Description
The MM74C192 and MM74C193 up/down counters are monolithic complementary MOS (
CMOS) integrated circuits.
The MM74C192 is a BCD counter, while the MM74C193 is a binary counter.
Counting up and counting down is performed by two count inputs, one being held high while the other is clocked.
The outputs change on the positive-going transition of this clock.
These counters feature preset inputs that are set when load is a logical “0” and ...