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The "Leaded Chip Carrier" (LCC) is a type of packaging used for integrated circuits. These packages are notable for having leads around their periphery which are used to electrically connect them to printed circuit boards (PCBs) and other devices.

Here are some key points about LCCs:

Design and Structure

•LCCs are square or rectangular packages with leads (metallic conductive legs) extending from the sides. Unlike packages with leads on just two sides, LCC leads may extend from all four sides of the package.

•The leads are generally "J-shaped" or "L-shaped" and are designed to be soldered directly to the surface of the PCB, making the LCC a type of surface-mount device (SMD).

Electrical Connection

•The leads provide the electrical connections from the silicon chip inside the LCC to the PCB. They are designed to have good mechanical strength and ensure reliable electrical contact.

•Because these are surface-mount devices, the LCCs are soldered onto pads on the PCB, and the solder also helps provide mechanical stability.

Size and Applications

•LCCs are typically small and can house a silicon chip without a lot of extra package size, which helps save space on the PCB.

•They are used across various applications, from simple circuits like timers and counters to more complex microprocessors and micro-controllers. They are found in consumer electronics, automotive systems, and professional electronic equipment.

Thermal and Environmental Performance

•The LCC's structure allows for efficient thermal performance, as the heat generated by the chip can be conducted out through the leads and then dissipated into the PCB and surrounding environment.

•LCCs can also be robust in terms of environmental resilience, depending on the specific materials and designs used. They may be suitable for use in environments with varying temperatures and humidity levels.

Considerations in Use

•Like all SMDs, LCCs require careful handling and specific soldering techniques to ensure reliable connections and avoid damage. This is particularly important during rework (removing and replacing components).

•Inspection can sometimes be challenging because the solder joints are under the package and not always easily visible. Techniques such as X-ray inspection are sometimes used to check these hidden solder joints.

•Because of their compact size and lead configuration, LCCs can allow for high-density layouts on PCBs, contributing to miniaturization and the reduction of overall system size.

It's important to note that technology and terminology in electronics evolve, and there can be variations in package names and details. For specific characteristics, capabilities, and recommendations for handling a particular LCC, it is always best to refer to the manufacturer's data-sheet or technical documents associated with the specific component you're using.