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7474 IC D-type Flip Flop Counter or Delay Flip-flop

Original price was: 12.00 EGP.Current price is: 11.00 EGP.

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Availability: In Stock
SKU:2270091930861

74HC74N flip-flop IC utilizes the Schottky TTL circuitry to produce high-speed D-type flip-flops. Each flip-flop has individual clear and set inputs, and also complementary Q and Q`(bar) outputs.

7474 Pinout Configuration
Pin Number Pin Symbol Name Description
5,9 1Q / 2Q Output Output Pin of the Flip Flop
6,8 1Q’(bar) / 2Q’(bar) Complementary Output The inverted output pin of Flip Flop
3, 11 1CLK / 2CLK Clock Input Pin These pins must be provided with a clock pulse for the flip-flop
1,13 1CLR (bar) / 2CLR (bar) Clear Data Resets the flip-flop by clearing its memory
2,12 1D /2D Data Input Pin Input pin of the Flip Flop
4, 10 1PRE (bar) / 2PRE (bar) PRE Input Another Input pin for Flip Flop. Also referred to as a set pin
7 Vss Ground Connected to the ground of the system
14 Vdd/Vcc Supply Voltage Powers the IC typically with 5V
Specifications
Product Attribute Attribute Value
Product Category: Flip-Flops
Number of Circuits: 2
Logic Family: 74HC
Logic Type: D-Type Flip-Flop
Polarity: Inverting/Non-Inverting
Input Type: Single-Ended
Output Type: Differential
Propagation Delay Time: 44 ns
High-Level Output Current: – 5.2 mA
Low-Level Output Current: 5.2 mA
Supply Voltage – Min: 2 V
Supply Voltage – Max: 6 V
Minimum Operating Temperature: – 40 C
Maximum Operating Temperature: + 125 C
Function: D-Type
Number of Channels: 2
Number of Input Lines: 8
Number of Output Lines: 4
Operating Supply Voltage: 2 V to 6 V

Note: Complete Technical Details can be found in the 74HC74 datasheet given at the end of this page.

How to use 7474

Using a Flip-Flop is pretty straightforward. Simply power the IC using the Vcc and GND pin. As told earlier each flip-flop operates independently, just connect the input signals 2 and 3 for using the 1st flip-flop and you will get the output at pins 5 and 6. Pin 3 should be provided with a clock source normally a PWM signal from an MCU or 555 timers is used. The pin can be used to clear the data and reset the flip-flop by making it high. The complete working of the Flip flop can be understood by looking at the function table below. The symbol “X” indicates don’t care and the up-arrow indicates the rising edge of the signal.

INPUTS OUTPUTS
PRE (bar) CLR (bar) CLK D Q Q (bar)
L H X X H L
H L X X L H
L L X X H H
H H H H L
H H L L H
H H L X Q0 Q(bar)

You can also simulate the IC to check if it would work as desired. Here I have used logic state and logic bits to view if the IC functions as it is supposed to, but you can replace them with the actual circuitry of your application to check if it would suit your needs. The gif file shown below can be verified with the truth table above to make sure that the IC works as desired.

74LS74 Circuit Working

Applications
  • Used as Shift Registers
  • Memory/Control Registers
  • Buffer Circuits
  • Sampling Circuits
  • Latching devices
Component Datasheet
7474 Datasheet
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