74LS273

74LS273 replacement chip. DIP-20. Octal D-type flip-flop with clear. The 74LS273 is a popular integrated circuit (IC) that belongs to the 74xx series of TTL (Transistor-Transistor Logic) digital logic chips. It specifically falls under the category of flip-flops and latches. The 74LS273 is an octal D-type flip-flop with a clear input, meaning it has eight individual flip-flops in a single package. Here are some key features and characteristics of the 74LS273: Flip-Flop Type: D-type (Data or Delay Flip-Flop) Number of Flip-Flops: 8 (Octal) Inputs: D0 to D7: Data inputs for each flip-flop CP (Clock): Clock input for all flip-flops MR (Master Reset): Master reset input (active-low) Outputs: Q0 to Q7: Individual flip-flop outputs Q̅0 to Q̅7: Complementary outputs Clear Function: The 74LS273 includes a Master Reset (MR) input, which is active-low. When MR is pulled low, it clears all the flip-flops, setting their outputs to a low state. Clock Edge Triggering: The flip-flops are triggered on the rising edge of the clock signal (CP). Operating Voltage: The typical operating voltage is 5V. Package: The 74LS273 is available in various package types, such as DIP (Dual In-line Package) and SOP (Small Outline Package). Applications of the 74LS273 include data storage, address decoding, and general-purpose sequential logic applications where the need for multiple flip-flops is present. It’s important to note that as of my last knowledge update in January 2022, technology and product specifications might have evolved, and there might be newer versions or alternatives available. Always refer to the latest datasheet or documentation for the most accurate and up-to-date information. Arcade Games and Pinball Machines that Use 74LS273 The following arcade games and pinball machines use the 74LS273 on their PCBs: 1942 1943 Asteroids Centipede Centuri Eagle Donkey Kong 3 Double Dragon Gun Smoke Galaga Gyruss Hyper Sports Lady Bug Lethal Enforcers Major Havoc Millipede Missile Command Ms. Pac-Man Pac-Man Rastan Space Duel Spy Hunter Star Wars Street Fighter Tapper Teenage Mutant Ninja Turtles TMNT Tempest Tron Track & Field many others… 74LS273 / 74LS273N Pinout The following represents the pinout of the 74LS273N in a DIP-20 package, commonly used in arcade and pinball machines. PIN 1: Clear PIN 2: Q1 Output PIN 3: D1 Input PIN 4: D2 Input PIN 5: Q2 Output PIN 6: Q3 Output PIN 7: D3 Input PIN 8: D4 Input PIN 9: Q4 Output PIN 10: Ground PIN 11: Clock PIN 12: Q5 Output PIN 13: D5 Input PIN 14: D6 Input PIN 15: Q6 Output PIN 16: Q7 Output PIN17: D7 Input PIN 18: D8 Input PIN 19: Q8 Output PIN 20: Vcc 74LS273 Datasheet You can find the datasheet for the 74LS273 here: 74LS273 datasheet