MM54C192 MM74C192 Synchronous 4-Bit Up Down Decade Counter
MM54C193 MM74C193 Synchronous 4-Bit Up Down Binary Counter
February 1988
MM54C192 MM74C192
Synchronous 4-Bit Up Down Decade Counter
MM54C193 MM74C193
Synchronous 4-Bit Up Down Binary Counter
General Description
These up down counters are monolithic complementary
MOS (CMOS) integrated circuits The MM54C192 and
MM74C192 are BCD counters while the MM54C193 and
MM74C193 are binary counters
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 鈥樷€?鈥欌€?and a clear which forces all outputs to 鈥樷€?鈥欌€?/div>
when it is at a logical 鈥樷€?鈥欌€?The counters also have carry and
borrow outputs so that they can be cascaded using no ex-
ternal circuitry
Features
Y
Y
Y
Y
Y
Y
High noise margin
1V guaranteed
Tenth power TTL compatible
Drive 2 LPTTL loads
Wide supply range
3V to 15V
Carry and borrow outputs for N-bit cascading
Asynchronous clear
High noise immunity
0 45 V
CC
(typ )
Connection Diagram
Dual-In-Line Package
TL F 5901 鈥?1
Top View
Order Number MM54C192 MM74C192
MM54C193 or MM74C193
C
1995 National Semiconductor Corporation
TL F 5901
RRD-B30M105 Printed in U S A
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