ULN2004AS16-13 Discrete Semiconductor Products

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The ULN2004AS16-13 is an integrated circuit designed for use in driving a wide variety of relays, lamps, and DC motors. It consists of a 16-channel Darlington array with 500 mA rated outputs, and it is designed to be connected directly to the microprocessor, PLC, or other logic-level outputs. The ULN2004AS16-13 is a popular choice for command and control applications, due to the ease of connecting it to a microprocessor, and its ability to handle high-current applications.

The ULN2004AS16-13 is a bipolar transistor array, which is a type of integrated circuit (IC) in which several transistors are interconnected and controlled together as a single unit. The array consists of 16 individual transistors, each with its own base, collector, and emitter, which are connected in parallel in an integrated circuit package. Each transistor has an associated Darlington driver in the form of two NPN transistors in series.

The driving force behind the array of transistors is the DARLINGTON COUPLING. This coupling is used because it provides very high current-gain, and allows the transistor to conduct current even with low voltages across its base-emitter junction. The Darlington coupling also reduces the input resistance of the transistor array, allowing it to drive larger loads than would be possible with individual transistors.

The ULN2004AS16-13 is designed to be driven by logic-level outputs, such as those from a microprocessor. This allows for greater control over the outputs, as the logic-level signals can be easily converted to voltage and current signals required to drive the transistors. This simplifies the connection of the IC to the rest of the system, as well as allowing for the efficient use of the available power.

The ULN2004AS16-13 is a reliable and cost-effective device for controlling motors, lamps, and relays. The wide range of operating voltages, from 2V to 52V, and the ease of connection to microprocessors and other logic-level outputs makes it a popular choice for many applications. With its high current-gain and low input resistance, the ULN2004AS16-13 can handle higher-power applications than would be possible with individual transistors.

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