FCX690BTA Discrete Semiconductor Products

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Transistor Type:	NPN
Current - Collector (Ic) (Max):	2A
Voltage - Collector Emitter Breakdown (Max):	45V
Vce Saturation (Max) @ Ib, Ic:	300mV @ 5mA, 1A
Current - Collector Cutoff (Max):	100nA (ICBO)
DC Current Gain (hFE) (Min) @ Ic, Vce:	400 @ 1A, 2V
Power - Max:	2W
Frequency - Transition:	150MHz
Operating Temperature:	-55°C ~ 150°C (TJ)
Mounting Type:	Surface Mount
Package / Case:	TO-243AA
Supplier Device Package:	SOT-89-3
Base Part Number:	FCX690B

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The FCX690BTA is a single, discrete Bipolar Junction Transistor (BJT) manufactured by Fairchild Semiconductor. It is a low-noise transistor ideal for use in audio amplifiers and other low-noise applications. In this article, the FCX690BTA application field and working principle will be discussed.The FCX690BTA is an NPN transistor and is available in a plastic surface mount package. It has a maximum gain bandwidth product of 1.7 GHz and a maximum current gain of 285. With its low noise characteristics and good gain, it is suitable for use in low-noise audio amplifiers, RF stages, and other applications that need a low-noise transistor.In terms of its working principle, the FCX690BTA has three electrodes, the collector, base, and emitter. The collector electrode is connected to the positive source, and is where most of the current flows through. The base electrode is connected to ground, and acts as both a control for the voltage and current and as a connection between the collector and the emitter. The emitter is connected to the negative source and is where electrons from the base flow into and out of the transistor.When the base electrode is supplied with the voltage, the electrons from the base electrode flow into the emitter and out to the collector, which creates a current flowing through the transistor. This process is known as current gain, or amplification. The amount of current gain or amplification produced depends on the voltage applied to the base electrode.In addition to using the FCX690BTA for amplifying low-noise signals, it is also useful for switching digital signals. When a digital signal is applied to the base electrode, it causes the collector-emitter voltage to switch from a high voltage to a low voltage. This process is known as switching and can be used to control a variety of digital devices, such as microprocessors, memory chips, and other digital circuits.In summary, the FCX690BTA is a low-noise, discrete Bipolar Junction Transistor, available in a plastic surface mount package. It has a high gain and maximum current gain of 285, making it an ideal choice for low-noise audio applications, RF stages, and digital signal switching. The working principle of the FCX690BTA involves the three electrodes, collector, base and emitter, which when stimulated with a voltage, create a current flow and amplification.

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