74ls290.pdf part of datasheets 74ls290 74ls290.pdf, . Electronic Components Datasheets Various datasheets 74ls290.pdf text manual preview

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SN54/74LS290
SN54/74LS293
DECADE COUNTER;
4-BIT BINARY COUNTER
The SN54 / 74LS290 and SN54 / 74LS293 are high-speed 4-bit ripple type
counters partitioned into two sections. Each counter has a divide-by-two sec- DECADE COUNTER;
tion and either a divide-by-five (LS290) or divide-by-eight (LS293) section 4-BIT BINARY COUNTER
which are triggered by a HIGH-to-LOW transition on the clock inputs. Each
section can be used separately or tied together (Q to CP)to form BCD, LOW POWER SCHOTTKY
Bi-quinary, or Modulo-16 counters. Both of the counters have a 2-input gated
Master Reset (Clear), and the LS290 also has a 2-input gated Master Set
(Preset 9).