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74169 Synchronous Counter

Description

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. All state changes, whether in counting or parallel loading, are initiated by the LOW-to-HIGH transition of the clock. CityTech BD

Features

  • 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

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