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3-State Output Octal D-Type Flip-Flop IC - 74HC374

3-State Output Octal D-Type Flip-Flop IC - 74HC374

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  • Buffered inputs
  • Common three-state output enable control
  • Three-state outputs
  • Bus line driving capability
  • Balanced propagation delay and transition times
  • Significant power reduction compared to LSTTL logic ICs
  • High noise immunity
  • Direct LSTTL input logic compatibility
  • CMOS Input compatibility
  • 10 LSTTL Load standard outputs
  • 15 LSTTL Load bus driver outputs

3-State Output Octal D-Type Flip-Flop IC - 74HC374

The 74HC Series 74HC374 is a 20 Pin 3-State output Octal D-Type Flip-Flop IC having 2V to 6V Operating Voltage range with 7.8mA output current and high noise immunity. It has the ability to drive  15  LS-TTL  loads.  Due to the large output drive capability and the 3-STATE feature, these devices are ideally suited for interfacing with bus lines in a bus organized system.  

The eight edge-triggered flip-flops enter data into their registers on the LOW to HIGH transition of the clock (CP). The output-enable (OE) controls the 3-state outputs and is independent of the register operation. When OE is HIGH, the outputs are in the high-impedance state.

Pinout:

Pinout of 74HC374 IC

Package Includes:

  • 1 x IC - 74HC374

Specifications:

Operating Voltage Range 2.0 to 6.0 V
Package DIP−20
Input Current 1 uA
Powering Current 80 uA
Output Current at VCC 6 mA
Fan-Out 10 LS-TTL Load
Propagation Delay 14 ns
Temperature Range -65 °C to +150 °C

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ADDITIONAL RESOURCES

1.What is the difference between the 74HC374 and 74HC574 ICs?

  • Both the 74HC374 and 74HC574 are octal D-type flip-flops with three states, but their input and output configurations differ. The 74HC374 has a common clock input and eight separate data inputs, whereas the 74HC574 has eight separate clock inputs and a common data input. The 74HC374 has a latch enable input, which enables or disables the flip-flops, whereas the 74HC574 does not.

2.How does the 3-state output feature of the 74HC374 IC work? 

  • The 74HC374 IC's 3-state output feature allows the output pins to be placed in a high-impedance state, effectively disconnecting them from the circuit. This function is frequently used in bus systems where multiple devices must share the same data lines.