74LS169

BCD DECADE/MODULO 16 BINARY SYNCHRONOUS BI-DIRECTIONAL COUNTERS The SN54 / 74LS168 and SN54 / 74LS169 are fully synchronous 4-stage up/down counters featuring a preset capability for programmable operation, carry lookahead for easy cascading and a U/ D input to control the direction of counting. The SN54 / 74LS168 counts in a BCD decade (8, 4, 2, 1) sequence, while the SN54 / 74LS169 operates in a Modulo 16 binary sequence. www.DataSheet4U.com All state changes, whether in counting or parallel loading, are initiated by the LOW-to-HIGH transition of the clock. SN54/74LS168 SN54/74LS169 BCD DECADE/ MODULO 16 BINARY SYNCHRONOUS BI-DIRECTIONAL COUNTERS LOW POWER SCHOTTKY Low Power Dissipation 100 mW Typical High-Speed Count Frequency 30 MHz Typical Fully Synchronous Operation Full Carry Lookahead for Easy Cascading Single Up / Down Control Input Positive Edge-Trigger Operation Input Clamp Diodes Limit High-Speed Termination Effects J SUFFIX CERAMIC CASE 620-09 16 1 CONNECTION DIAGRAM DIP (TOP VIEW) V CC TC Q 0 Q 1 Q 2 Q 3 CET PE 16 1 N SUFFIX PLASTIC CASE 648-08 16 15 14 13 12 11 10 9 NOTE: The Flatpak version has the same pinouts (Connection Diagram) as the Dual In-Line Package. 1 2 3 4 5 6 7 8 16 1 D SUFFIX SOIC CASE 751B-03 U/D CP P 0 P 1 P 2 P 3 CEP GND ORDERING INFORMATION SN54LSXXXJ SN74LSXXXN SN74LSXXXD Ceramic Plastic SOIC PIN NAMES LOADING (Note a) HIGH LOW 0.25 U.L. 0.5 U.L. 0.25 U.L. 0.25 U.L. 0.25 U.L. 0.25 U.L. 5 (2.5) ...