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-Line Package. 1234567 MS NC MS Q2 Q1 NC GND VCC MR MR CP1 CP0 Q0 Q3 14 13 12 11 10 9 8 http://onsemi.com DECADE COUNTER; 4-BIT BINARY COUNTER LOW POWER SCHOTTKY 14 1 14 1 14 1 J SUFFIX CERAMIC CASE 632-08 N SUFFIX PLASTIC CASE 646-06 D SUFFIX SOIC CASE 751A-02 LS293 1234567 NC NC NC Q2 Q1 NC GND ORDERING INFORMATION SN54LSXXXJ SN74LSXXXN SN74LSXXXD Ceramic Plastic SOIC PIN NAMES LOADING (Note a) CP0 CP1 CP1 MR1, MR2 MS1, MS2 Q0 Q1, Q2, Q3 Clock (Active LOW going edge) Input to ÷ 2 Section. ...