74LS90 IC ? (SMD Package) – Decade Counter IC (7490 IC)
The 74LS90 is a 4-bit ripple type counters partitioned into two sections. Each counter has a divide-by-two section and either a divide-by-five (LS90) section 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, bi-quinary, modulo-12, or modulo-16 counters. All of the counters have a 2-input gated Master Reset (Clear), and the LS90 also has a 2-input gated Master Set. The following are the features:-
SKU:
RW-02381
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The 74LS90 is a 4-bit ripple type counters partitioned into two sections. Each counter has a divide-by-two section and either a divide-by-five (LS90) section 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, bi-quinary, modulo-12, or modulo-16 counters. All of the counters have a 2-input gated Master Reset (Clear), and the LS90 also has a 2-input gated Master Set. The following are the features:-
? Low Power Consumption :Typically 45 mW
? High Count Rates :Typically 42 MHz
? Choice of Counting Modes : BCD, Bi-Quinary, Divide-by-Twelve, Binary
? Input Clamp Diodes Limit High Speed Termination Effects
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