2N7002 | Datasheet, Pinout, Circuit, PDF Fairchild Semiconductor

2N7002 – Voltage Level Changer – Online Demo

2N7002 Pinout

2n7002 pinout Picture

2n7002 is a SOT-23 package N-channel type transistor; according to the datasheet can be seen with a maximum withstand voltage value of 60V, for the SOT-23 package N-channel type transistor is already a very high withstand voltage value, and has a continuous current of 500ma (used to drive a small current circuit is enough); has a very fast switching performance, so very suitable for switching circuits; because the amplification gain is about 20 or so, so it is also very suitable for level conversion circuits. So it is very suitable for switching circuits; because the amplification gain is about 20, so it is also very suitable for level conversion circuits. For example, used in two different operating voltage microcontroller for serial communication, due to the two voltage is not consistent, so the definition of the high and low levels are not the same, this time it is necessary to achieve a level conversion circuit to achieve the two high and low levels of unity, so that you can achieve serial communication.
The pin definitions are shown below:

In general NMOS is usually used for low end drive (that is to say only small Vgs are needed to turn the NMOS on).

2N7002 Equivalent

2N7002 Picture

2N7002 is a commonly used N-channel MOSFET, package for SOT-23, this package is more suitable for small PCB more space-saving and easy to weld (hot air gun blowing directly on it); specific device parameters are as follows: with a maximum withstand voltage value of 60V, although the value is not very large, but for this package of products has been more large (this type of product) (generally used in low-voltage circuits); on voltage of 1.6V (typical, maximum 2.5V, minimum 1V); generally speaking, 1.6V or so of the on voltage can be directly driven by the microcontroller, which is very favorable for embedded devices, can be directly driven by the microcontroller, you can reduce the design of the drive circuit, making the circuit cost is lower; faster switching time (on is) 20ns off is 40ns), can be used for low-voltage DCDC conversion circuit. Generally speaking, 2n7002 transistors are generally used in level conversion circuits, protection circuits for embedded devices and as switches in circuits. Precautions are: gate drive voltage should be less than the rated value (2n7002 is 20V, higher than this value will break down), anti-static protection, 2n7002 only 115ma of continuous current through, which means that the transistor in most cases is only suitable for low-power circuits.
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