![]() ![]() 3.1 Specifications of 2N2222 Motor Driver IC. It is often used as a small signal transistor and it is still a small general purpose transistor that endures. Note that in your specific case, the code you're looking for is probably just "331". The 2N2222 is considered a very common transistor and is used as an example of an NPN transistor. If the manufacturer no longer exists, or has gotten bought up by another company decades ago, you're probably just out of luck. If they don't, you'd have to contact the manufacturer and ask. Even if you do know the manufacturer, these codes are meant mostly for the manufacturer's internal reference, so they might not be explained on the datasheet. Specifications of 2N2222A Bipolar Junction NPN Transistor: Transistor Polarity: NPN Collector-Emitter Voltage V(BR)CEO: 30V Power Dissipation Pd: 500mW DC. There is no standard, so without knowing the manufacturer, you're out of luck. ![]() But fitting that along with the part number on a TO-92 or TO-18, let alone a SOT-23 or SC-70, is pretty tough, so other codes are used instead. On parts with more room than a TO-92 or TO-18 provides, you might get a one-digit factory code for which factory the part was made in, combined with a four-digit date code consisting of the last two digits of the year and two digits indicating which week of the year it was made in. The usual practice is to put some manufacturer-specific code that identifies which lot the device came from. ![]()
0 Comments
Leave a Reply. |