What Are The Detailed Specifications Of Common IC Components

IC components used in PCBA processing are usually divided into two categories: DIP (Dual In-line Package) plug-in IC and SMD (Surface Mount Device) surface mount components. DIP plug-in IC has two rows of pins that can be inserted into the holes of the PCB for connection, suitable for manual soldering and repair. SMD surface mount components are directly welded on the surface of the PCB, which has higher integration and production efficiency and is suitable for mass production and automated welding. The two are different in terms of packaging form, pin type and applicable scenarios. It is very important to choose the appropriate IC component according to actual needs.

In the SMD field, what do the 0603, 0805, and 1206 we often hear stand for? In fact, they represent the package size of the component, that is, length (Length) multiplied by width (Width). These dimensions are usually given in inches or millimeters. Generally speaking, the dimensions of SMD resistors and capacitors are described in inches. These dimensions are composed of four digits in sets of two digits.

For example:

• 0603: 0.06" x 0.03", or 60 x 30 mils, or 1.6 x 0.8mm (note: 1 mil = one thousandth of an inch).
• 0805: 0.08" x 0.05", or 80 x 50 mils, or 2.0 x 1.25mm.
• 1206: 0.12" x 0.06", or 120 x 60 mils, or 3.2 x 1.6mm.

Sometimes, component dimensions are also expressed in metric millimeters. For example, 1608 (mm) corresponds to 0603 (inch).

Correspondence between metric and imperial components package

SMD resistor specifications
The specifications of SMD resistors are usually marked directly on the component, and codes are generally used to represent their resistance values. These codes can be numeric codes, color codes, or alphabetical codes. Common SMD resistor specifications include nominal resistance, tolerance, power rating, etc.

	No marking
	For marked low-ohm resistors, you'll typically see an "R," an ohms symbol, or another character in place of the decimal point: 0.22ohm.
	E-24 series/non-E series (R=25/40/5O/60/2501400/500mQ): 4 digits. "R" used as decimal point: other 3 significant figures:0.02ohm.
	If the multiplier (last digit) is zero, this also means decimal: 24 ohms.E-24 series, 1%, 0.5%, E24 exception value 10/11/13/15/20/75.
	1%, 0.5%, E24/E96 series: 4 digits The first three digits are significant figures and the fourth digit is the exponent:10K ohms.
	5%, E24 series: 3 digits The first two digits are significant figures, and the third digit is the exponent.

There are many different types of capacitors, mainly made of different materials, such as ceramic capacitors, tantalum capacitors, electrolytic capacitors, etc. These types of capacitors differ in their characteristics. Capacitors with a capacity above 0.1uF are generally regarded as larger capacitance values. Larger capacitors usually have positive and negative terminals.

For SMD capacitors, since there is no obvious identification, we usually need to refer to the specifications on the patch tape. From the perspective of the volume of the capacitive element, the larger the volume, the greater the capacitance value.

In the specifications on the aasembly tape, you will see codes like 104 and 103, which represent the capacitance value. For example, 104, according to the above expression, represents 10 x 10 raised to the fourth power pF, which is 100000 pF, which is 100nF, or 0.1uF. Likewise, 330 represents 33pF.

SMD capacitors are not marked with any value

                                                    220 is expressed as 22pF

Other SMD components
For SMD transistor, SOT (Small Outline Transistor), such as SOT-23
IC for SMD, SOIC (Small Outline IC), such as SOIC-8, SOIC-16
The more pins the IC has, of course, different packaging technologies will be derived (that is, the die case packaging will be different), for example
TQFP (Thin Quad Flat Pack), 100 or 144 pins.
PQFP (Plastic Quad Flat Pack), 208 or 240 pins.
BGA (Ball-Grid Array), 256 to 1000+ pins.