Ic Package Types And Definitions}

Submitted by: DAVID SMITH

IC (Integrated Circuit) means an assemblage of electronic components such as resistors, transistors, capacitors, etc. All these are crammed into a very small chip and attached with each other to acquire a common objective.

The IC package is what encases the die of integrated circuit and extends it out into a device we can more conveniently attach to. Every external connection on the die is linked via a very small piece of gold wire to a pad or pin on the packaging. The silver, extruding terminals on an IC are the pins. These pins carry out the work to link to different components of a circuit. These are of highest significance to us whereas they are what will go on to connect to the remaining elements and wires in a circuit.

Every IC is polarized and each is pin is distinctive in case of both position and operation. For this reason, it is necessary for the package to have some way to impart which pin is which. For most ICs, a dot or a notch (in some cases, both or sometimes anyone of them) designates the first pin. If you can recognize the first pin, the rest of the pin numbers increase according to the sequence as you move counter-clockwise around the chip.

The way how the IC packages mount to a circuit board is one of the primary distinguishable package type characteristics. Mainly there are two mounting types: through-hole (PTH) or surface-mount (SMD or SMT). All packages fall into one of these two mounting types. Usually through-hole packages are bigger in size and much simpler to work with. They are designed especially to be pierced through one side of a board and dredged to the other side.

Surface-mount packages can be small to minuscule in size. They are all intended to be installed on one side of a circuit board and be dredged to the surface. Most of the times, the pins of a SMD package thrust out the side. These also steep to the chip, or are sometimes set out in a matrix on the bottom of the chip. ICs with surface mount packages are not very suitable to assemble with hands. Generally special tools are needed to assist in the process.

There are numerous varieties of IC packages, each of which has distinctive measures, mounting styles, and/or pin-enumerations. These packages are batched into three major categories: Dual In-line Packages, Grid Arrays and Chip Carriers. Each package, regardless of the category has a body style that scales with pin count. The number of pins determines the physical dimension of the package, the name of the package does not.

1. Dual In-line Packages [DIP], or Dual In-Line [DIL] packages are packages with two rows of leads on two sides of the package. DIP ICs may be through-hole [PDIP or CERDIP] or SMT package [SOJ or SOIC].

2. Quad Flat Packs or Chip Carriers are square packages [or nearly square], with leads on all four sides Chip Carriers, as in PLCCs and other variants are strictly Surface Mount Technology (SMT).

3. Grid Arrays are those type packages that have their pins arranged in a grid. The pin grid may consist of Leads, pads, or solder balls on an area array. The through hole variant is called a PGA, while the SMT variant might be called LGA or BGA.

About the Author: David Smith, Senior Vice President of

USComponent.com

, an IGBT power transistor module distributor since 2001.

Source:

isnare.com

Permanent Link:

isnare.com/?aid=1945112&ca=Computers+and+Technology
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Things To Consider When Searching For Chimney Cleaning In Bergen County Nj

byAlma Abell

Homeowners look for chimney cleaning services for different reasons. There are many of these services around, and it can be hard to decide which one to select. There are a number of things to consider when looking for the best service. First, you should determine your specific requirements, then compare the various companies to find one that meets your needs. It is important that you have a list of all the tasks that you want to the company to take care of and ensure that everything is indicated in the service contract.

It is also essential that you choose a company that is experienced in handling such tasks. As a rule, the longer the firm has been in the industry, the more able they’ll be to providing quality services. This, of course, does not mean that new companies do not provide good services, it simply means that you need to test their expertise first. You should look for a firm that provides a complete package as opposed to one that charges per service. Depending on your requirements, ensure that the firm can provide all the services that you have on your list. This will generally help reduce your overall cost.

In addition, it is essential to check the company’s commitment level to service excellence. Some Chimney Cleaning in Bergen County NJ services will offer their clients discounts in return for lasting working relationships. This can be an excellent way to reduce costs, but before committing to such a service, ask them to give you a trial period of at least one month to enable you assess the services that they provide.

If you are happy with the services that the company provides, make sure you read and understand the service contract before you commit to it. It will be beneficial to go through the quote once more to ensure the company will not add other charges when the job is completed. If there will be additional charges, the service provider should inform you about them ahead of time, and have them included in the service contract before the work starts. Visit the website of All American Chimney & Duct Cleaning Inc. to learn more about chimney cleaning in Bergen County NJ.