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 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). SN54/74LS290 SN54/74LS293 DECADE COUNTER; 4-BIT BINARY COUNTER LOW POWER SCHOTTKY 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 14 MR 13 MR 12 CP1 11 CP0 10 Q0 9 Q3 8 NOTE: The Flatpak version has the same pinouts (Connection Diagram) as the Dual In-Line Package. J SUFFIX CERAMIC CASE 632-08 14 1 14 1 N SUFFIX PLASTIC CASE 646-06 LS290 1 MS VCC 14 2 NC MR 13 3 MS MR 12 4 Q2 CP1 11 5 Q1 CP0 10 6 NC Q0 9 14 7 GND Q3 8 1 D SUFFIX SOIC CASE 751A-02 ORDERING INFORMATION SN54LSXXXJ SN74LSXXXN SN74LSXXXD Ceramic Plastic SOIC LS293 1 NC 2 NC 3 NC 4 Q2 5 Q1 6 NC 7 GND PIN NAMES Clock (Active LOW going edge) Input to ÷ 2 Section. Clock (Active LOW going edge) Input ...