IC 74LS374 3-State Octal Edge-Triggered D-Type Flip-Flop

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  • Jameco Part no.: 47634
  • Manufacturer: Major Brands
  • Manufacturer no.: 74LS374
  • HTS code: 8542310000
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3-State Octal Edge-Triggered D-Type Flip-Flops


These 8-bit registers feature totem-pole 3-STATE outputs designed specifically for driving highly-capacitive or relatively low-impedance loads. The high-impedance state and increased high-logic level drive provide these registers with the capability of being connected directly to and driving the bus lines in a bus-organized system without need for interface or pull-up components. They are particularly attractive for implementing buffer registers, I/O ports, bidirectional bus drivers, and working registers. The eight flip-flops of the DM74LS374 are edge-triggered D-type flip flops. On the positive transition of the clock, the Q outputs will be set to the logic states that were set up at the D inputs. A buffered output control input can be used to place the eight outputs in either a normal logic state (HIGH or LOW logic levels) or a high-impedance state. In the high-impedance state the outputs neither load nor drive the bus lines significantly. The output control does not affect the internal operation of the flip-flops. That is, the old data can be retained or new data can be entered even while the outputs are OFF.


  • 3-STATE bus-driving outputs
  • Full parallel-access for loading
  • Buffered control inputs
  • P-N-P inputs reduce D-C loading on data lines

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