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ULN2003A pinout Simplified ULN2003A logical pinout diagram.. The ULN2003A is an integrated circuit produced by Texas Instruments.It consists of an array of seven NPN Darlington transistors capable of 500 mA, 50 V output.
Transistor array chip containing two bipolar transistors. Transistor arrays consist of two or more transistors on a common substrate. Unlike more highly integrated circuits, the transistors can be used individually like discrete transistors. That is, the transistors in the array are not connected to each other to implement a specific function.
Darlington Transistor (NPN-type) In electronics, a Darlington configuration (commonly called as a Darlington pair) is a circuit consisting of two bipolar transistors with the emitter of one transistor connected to the base of the other, such that the current amplified by the first transistor is amplified further by the second one. [1]
NPN open collector output schematic. A signal from an IC's internal function is applied as the base input for a NPN BJT transistor, which controls the transistor's switching to the IC's ground. The external output is the transistor's collector.
Supermatched NPN Transistor Pair LM566 Yes Voltage Controlled Oscillator (VCO) LM567 No Tone decoder LM3909 LED Flasher/Oscillator LM3914: Bargraph display driver (linear steps) LM3915: Bargraph display driver (logarithmic steps) LM3916: Yes Bargraph display driver (VU-meter steps) LM13600 Yes Operational Transconductance Amplifier (OTA) LM13700
The 2N3904 is an NPN transistor that can only switch one-third the current of the 2N2222 but has otherwise similar characteristics. The 2N3904 exhibits its forward gain (beta) peak at a lower current than the 2N2222, and is useful in amplifier applications with reduced I c , e.g., (gain peak at 10 mA for the 2N3904 but 150 mA for the 2N2222).