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

7474 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 NumberPin SymbolNameDescription
5,91Q / 2QOutputOutput Pin of the Flip Flop
6,81Q’(bar) / 2Q’(bar)Complementary OutputThe inverted output pin of Flip Flop
3, 111CLK / 2CLKClock Input PinThese pins must be provided with a clock pulse for the flip-flop
1,131CLR (bar) / 2CLR (bar)Clear DataResets the flip-flop by clearing its memory
2,121D /2DData Input PinInput pin of the Flip Flop
4, 101PRE (bar) / 2PRE (bar)PRE InputAnother Input pin for Flip Flop. Also referred to as a set pin
7VssGroundConnected to the ground of the system
14Vdd/VccSupply VoltagePowers the IC typically with 5V
 
Specifications
Product AttributeAttribute Value
Product Category:Flip-Flops
Number of Circuits:2
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 7474 datasheet given at the end of this page.

Like every other chip in the 7400 series, this IC must be connected to power before you can use it. Most 7400 ICs support a VCC voltage of 5V. One difference between the HC and LS version of the chip is that the 74HC04 supports 2V to 6V, while the 74LS04 supports only 5V.

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.

INPUTSOUTPUTS
PRE (bar)CLR (bar)CLKDQQ (bar)
LHXXHL
HLXXLH
LLXXHH
HHHHL
HHLLH
HHLXQ0Q(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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