The high operating speed of FAST can push systems operation into areas previously reserved for 10K ECL, and do it using simple TTL design rules and a single 5 V power supply. FAST is the logic of choice for a large portion of the PC industry because it is broadly sourced, attractively priced, and (as the name implies) very fast.

Features and benefits

  • 3 ns typical propagation delay
  • 4 mW / gate power dissipation
  • Guaranteed AC performance over temperature and extended VCC 5 V ±10%
  • Standard TTL functions and pinouts
  • Designer's choice for cost-sensitive, high-speed systems


  • Desktop PCs
  • PC peripherals
  • Telecom and networking
  • Glue logic

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