| No | Part number | Description ( Function ) | Manufacturers | |
| 2 | SC221 | Synchronous Step-Down Regulator SC221 x POWER MANAGEMENT 20MHz, 650mA, X-EMI™-Enabled Synchronous Step-Down Regulator Features Description Patented X-EMITM Inductor Technology Enables Trace Inductors in PC Board Material Excellent EMI Performance Efficiency up to 90% 17.5µA Quiescent Current under Very Light Loads Wide Input Voltage Range — 2.7V to 5.5V Adjustable |
 Semtech |
|
| 1 | SC22101 | Electrically Erasable / Programmable Memories http:// |
 Sierra |
|
[1]
List of most widely used semiconductors
| Part Number | Function | Manufacturers | |
| 1N4007 | The 1N4007 is a rectification diode that is designed for high-voltage applications, typically up to 1000V. It has a maximum current rating of 1A and a forward voltage drop of around 0.7V. |
 Vishay |
|
| LM317 | This is a popular adjustable voltage regulator. |
 ON Semiconductor |
|
6N137 | LM393 | 2N3906 | 2N2222 | TIP120 | 1N5818 | LM324N | A1015 | SMAJ20CA |
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