ULN2064B

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The ULN2064B is one of the most versatile, high voltage, high current Darlington array integrated circuits. It is manufactured by Texas Instruments and is popular with designers for its unique combination of features, including wide operating voltage range (2V-50V), high current rating (500 mA per channel), and multiple logic input compatibility (TTL, 5V CMOS logic). The ULN2064B is ideal for applications in many electronic circuits and system designs, including solenoid and relay control, DC motor control, power supply regulation, power device switching, and more.

The ULN2064B consists of eight NPN darlington transistors. Each of them have a collector-emitter voltage rating of 50V (maximum) and an output current rating of 500 mA. The transistors are connected in parallel, making them suitable for driving high current loads. They can also be used to interface with logic circuits, as each output is driven by a separate logic input. Internal ESD protection and low-voltage output enable safe operation under high-voltage conditions.

The ULN2064B operates on the principle of two-level logic. High-level logic (H) causes the output to be on and low-level logic (L) causes the output to be off. When a logic input is set to H, the associated output transistor conducts current. Conversely, when the same logic input is set to L, the output transistor does not conduct current. All of the outputs can also be controlled by a single input, making it possible to control large loads with ease.

The ULN2064B is ideally suited for applications that require multiple inputs and output control. Its ability to interface with low-voltage logic circuits and drive high-current loads make it one of the most popular high-voltage and high-current integrated circuits. The ULN2064B can be used to control solenoids and relays in security systems, drive high-current DC motors in home automation systems, provide power supply regulation in power converters and switching circuits, and much more. It is an invaluable tool in the design of modern electronic systems and a must-have for any designer looking to add versatility and reliability to his projects.

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