The IC 7474 is an electrical chip consisting of dual D-type positive edge-triggered flip flops. Their outputs include preset and clear. Flip flops are often seen in electronic and computer devices because they have the ability to store data. Each flip-flop can store approximately one bit of data. There are many types of flip-flops, but the “D-type” indicates it is for storing data.
Diagram and Application
There are 14 pins associated with the IC 7474 chip. Each pin has a specific purpose in making an electrical circuit function. The pins are as follows:
Pin 1 – Clear 1 Input
Pin 2 – D1 input
Pin 3 – Clock 1 Input
Pin 4 – Preset 1 Input
Pin 5 – Q1 output
Pin 6 – Complement Q1 output
Pin 7 – Ground
Pin 8 – Complement Q2 output
Pin 9 – Q2 output
Pin 10 – Preset 2 Input
Pin 11 – Clock 2 Input
Pin 12 – D2 input
Pin 13 – Clear 2 Input
Pin 14 – Positive Supply
The D input is like a memory cell, delay line, or zero-order hold. When D input information is triggered to go to the flip flops, the triggering has nothing to do with the transition of time. It has more to do with the level of voltage.
However, the D input information can be altered whether the clock is set to high or low. This won’t affect any of the outputs if there are no violations of the hold times and data setup. On the other hand, if the clear inputs or preset inputs have a low logic level, the outputs will be reset no matter the logic levels of the clock inputs.
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Overall, the IC 7474 has wide operating conditions because of its large voltage range operation. If you were to purchase the IC 7474 chip separately, it would only cost you a few dollars. But you must have experience working with electrical components if you’re going to install or replace this chip. That way, you can stay safe.