Non Polarized Capacitor Types

A capacitor is an electronic component with two terminals that store electricity temporarily. There are two types of capacitors: non-polarized and polarized. Non-polarized capacitors have no negative polarity or positive polarity, while polarized capacitors have a positive pole and negative pole.

There is only one type of polarized capacitor, which is the electrolytic capacitor. The non-polarized capacitors are more popular because they are inexpensive and have better longevity. It also doesn’t matter which direction they’re installed either.

However, the type of non-polarized capacitor does matter. There are at least eight different types of non-polarized capacitors. Let’s briefly examine them below.

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Ceramic Capacitors

Ceramic capacitors are used the most because they’re the cheapest and the most tested capacitors. They have been around since the 1930s but have seen improvements over the many decades. Ceramic capacitors are used a lot in radio frequency circuits.

Silver Mica Capacitors

You won’t see silver mica capacitors used too often because they cost more than most other capacitors. But they are highly durable capacitors because of their stability and temperature resistance. Circuits that depend on stability, such as filter circuits and oscillator circuits, will use silver mica capacitors.

Polyester Capacitors

These are cheaper capacitors with good accuracy and less prone to leakage. Unfortunately, their stability is not as good as other capacitor types.

Polystyrene Capacitors

You can get a lot of accuracy out of polystyrene capacitors. They’re difficult to find on the market, though. Most circuit designs don’t use them anymore. Besides, they were pretty expensive, to begin with.

Polycarbonate Capacitors

Polycarbonate capacitors are also kind of pricey, but they’re made from high-quality material and last a long time. They can withstand high temperatures without leaking.

Polypropylene Capacitors

Polypropylene capacitors are high performing capacitors with great stability but a tad expensive.

Teflon Capacitors

No other capacitor is more stable than a Teflon capacitor. It is one of the most accurate capacitors with virtually no leakage whatsoever.

Glass Capacitors

Glass capacitors may be the most expensive of all capacitors, but they’re extremely tough and stable.

IC 7474 Pin Diagram and its Application

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.

Basic Information of 74LS138 3 to 8 Line Decoder IC

74LS138 3 to 8 Line Decoder IC utilizes the silicon-gate TTL technology. The design of the chip is for de-multiplexing or decoding applications. The 74LS138 comes with three inputs to eight output setup. It also has a special design that allows it to be used in data-routing applications or high-performance memory-decoding. It is effective in applications that require short propagation delay times.

The decoders have a special function of minimizing the effects of system decoding in high-performance memory systems.

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74LS138 3 to 8 Line Decoder IC Configuration

The basic configuration of the 74LS138 3 to 8 Line Decoder IC is that it has 3 inputs to 8 outputs setup. Each pin in the decoder has a special function that differentiates it from the rest.

A, B, C: these are address input pins

G2A (Enable input – active LOW), G2B (Enable input – active LOW), G1(Enable input – active HIGH)

GND – Ground

Y0, Y1, Y2, Y3, Y4, Y5, Y6, Y7: Out pins

Users can pick different available packages of this device.

Features of 74LS138 3 to 8 Line Decoder IC

The dominating features of the 74LS138 include the following:

  • It has been designed for high-speed performance
  • It simplifies cascading with the incorporation of the three enable pins
  • It has de-multiplexing capabilities
  • It delivers high performance
  • At has an ESD protection
  • It has balanced propagation delays
  • Its inputs can accept voltages that are higher than VCC
  • A typical propagation delay is 21nS
  • Another great feature is that it is consumption-friendly when it comes to power. It does not consume a lot of power, thus, help in reducing the cost of power. Its typical consumption is 32mW
  • It can operate within a wide range of temperatures i.e. from -40 degrees Celsius to +125 degrees Celsius.

An overview of 74LS138 3 to 8 Line Decoder IC

The chip has been designed for high-performance us in memory-decoding or data-routing applications that need short propagation delay times.

In most applications, any delays are not tolerated because the performance is determined by the memory unit data exchange rate. Using the 74LS138 3 line decoder is ideal in such applications because the delay times are permissible using this decoder.


You can use it for:

  • Servers
  • Line decoders
  • Digital systems
  • Line de-multiplexing
  • Memory circuits
  • Telecom circuits.


SCT3xxxxR SiC MOSFET Overview

ROHM made the announcement of the availability of a new trench gate structure, SiC MOSFETs. This is a six-SCT3xxx xR series, which has a 4-pin package to maximize the performance of switching, reduce power consumption, reduce switching loss. Compared to the 3-pin package, this 4-pin package enhances efficiency greatly. The 3-pin package does not separate the driver and power sources as the 4-pin package does. This helps reducing parasitic inductance components, which eventually helps in maximizing the switching speed of SiC MOSFETs.

What is SiC MOSFETs ideal for?

Well, SiC MOSFETs are ideal for solar inverters, server power supplies, and charging stations for electrical vehicles.

The reason why SCT3xxxxR SiC MOSFET is ideal for these high-demanding electrical installations is that they require high efficiency, which is offered by the 4-pin package that maximizes the switching speeds.

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Features of the SCT3xxxxR SiC MOSFET

  • Reduces switching loss by about 35%

One of the most amazing features of SCT3xxxxR SiC MOSFET is that it reduces switching loss by about 35%. Thanks to the 4-pin package that reduces the effect of the inductance component, the driver source and the terminal source are separated to reduce switching loss. Users simply need to add the turn-off and turn-on loss to reduce switching loss by about 35% compared to conventional products.

  • Fast switching speed and reverse recovery

Another outstanding feature of SCT3xxxxR SiC MOSFET is the speed at which it operates. Whether you are switching on or reserving, the speeds are extremely fast.

  • High speed and low on-resistance

The SCT3xxxxR SiC MOSFET works excellently with silicon devices. The electrical characteristics of ROHM’s SiC MOSFET allow it to work well even at high temperatures. This means that there are high speeds recorded and low on-resistance because the peripheral components are downsized.

  • Flexible operating temperatures

SCT3xxxxR SiC MOSFET can operate with temperature ranging between -55 degrees Celsius to 175 degrees Celsius.  This wide range of temperatures allows it to operate high-demanding devices while maintaining high efficiency.

  • Evaluation board

The evaluation board of SCT3xxxxR SiC MOSFET is effective as it can evaluate other ROHM SiC MOSFETs. The features of the evaluation board are excellent and allow for adjustments depending on the electrical requirements. It also has in-built protection and an overcurrent protection function.

These are the main features of the SCT3xxxxR SiC MOSFET. Of course, it is a revolutionary tech improvement that enhances efficiency while reducing power consumption.