2N2640

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The 2N2640 is a discrete NPN Silicon transistor array with three elements designed for general-purpose low-power amplification and switching applications. It is composed of a PNP SILICON planar epitaxial transistor and two NPN elements.

The 2N2640 is often used in timer applications, such as delay line circuits, because it is pin-to-pin compatible with the 2N2707A, 2N3907, and 2N2907A delay lines. It can also be used as an amplifier because the PNP element has higher input impedance than the NPN elements. This improves the overall gain-bandwidth product of the array.

The basic operational principle of the 2N2640 transistor array is similar to that of other bipolar junction transistors (BJTs). Current flows in one direction through the emitter-base junction, causing electrons to be released from the emitter and current to flow towards the collector. When this happens, the collector-emitter voltage drop, or VCE, is reversed, allowing current to flow from the collector to the emitter.

The 2N2640 is also suited for switching applications. When the bias current in the base-emitter junction is increased, the base-collector voltage, or VCB, decreases exponentially, causing the transistor to switch on and off rapidly. This makes it ideal for switching low-level signals, such as those found in logic circuits. It can also be used to switch higher levels of current, making it suitable for motor or robotics applications.

The 2N2640 is a reliable and robust transistor array that offers good performance at low power. It has excellent thermal performance, which allows it to withstand high temperatures. Other features include a good input/output isolation, fast switching times, and low power dissipation.

Overall, the 2N2640 is an ideal choice for general-purpose low-power amplification and switching applications. It is pin-to-pin compatible with other transistors in its class, making it easy to integrate into existing designs. The excellent thermal performance, fast switching times, and low power dissipation make it ideal for a wide range of low-power applications.

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