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Part Number SN74LS290
Manufacturers Motorola
Logo Motorola
Description DECADE COUNTER 4-BIT BINARY COUNTER
Datasheet SN74LS290 DatasheetSN74LS290 Datasheet (PDF)

  SN74LS290   SN74LS290
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 section and either a divide-by-five (LS290) or divide-by-eight (LS293) 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, 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). • Corner Power Pin Versions of the LS90 and LS93 • Low Power Consumption . . . Typically 45 mW • High Count Rates . . . Typically 42 MHz • Choice of Counting Modes . . . BCD, Bi-Quinary, Binary • Input Clamp Diodes Limit High Speed Termination Effects CONNECTION DIAGRAM DIP (TOP VIEW) VCC MR MR CP1 CP0 Q0 Q3 14 13 12 11 10 9 8 LS290 NOTE: The Flatpak version has the same pinouts (Connection Diagram) as the Dual In-L.



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