HCPL-6251

Series:	--
Packaging:	Tube
Part Status:	Active
Number of Channels:	4
Inputs - Side 1/Side 2:	4/0
Voltage - Isolation:	1500VDC
Common Mode Transient Immunity (Min):	1kV/µs
Input Type:	DC
Output Type:	Push-Pull, Totem Pole
Current - Output / Channel:	15mA
Data Rate:	5MBd
Propagation Delay tpLH / tpHL (Max):	350ns, 350ns
Rise / Fall Time (Typ):	45ns, 10ns
Voltage - Forward (Vf) (Typ):	1.3V
Current - DC Forward (If) (Max):	8mA
Voltage - Supply:	4.5 V ~ 20 V
Operating Temperature:	-55°C ~ 125°C
Mounting Type:	Surface Mount
Package / Case:	16-Flatpack
Supplier Device Package:	16-Flatpack

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Optoisolators - Logic OutputThe HCPL-6251 optocoupler is one of the most widely used optoisolator devices for communication between digital and analog circuits. It is a logic output optoisolator designed to switch between two states based on the control signal. The device typically consists of an integrated circuit (IC), an LED, and a phototransistor detector. The HCPL-6251 optoisolator has two distinct components: the driver circuit and the detector circuit. The driver circuit consists of an integrated circuit that consists of a driver and output transistor, both of which are located on the same chip. This integrated circuit is responsible for generating the logic levels for operation of the optoisolator. It also contains circuitry to reduce power consumption in order to make the device more efficient.The second component is the detector circuit, which contains an LED and a phototransistor. The LED is used to supply the light signal to the corresponding phototransistor in the detector circuit. The phototransistor detects the incoming light signal and gives out a logic level voltage across the two pins of the detector circuit. The output from the detector circuit is then used to control the logic signals from the optoisolator.The HCPL-6251 optoisolator can be used in various applications, including switching high-current loads, controlling motors, and interfacing with microprocessors. It is also widely used in the telecommunications industry for controlling digital signal conditioning circuits. In addition, it is also used in the automotive industry for controlling the electrical systems of a vehicle, such as the lights, radio, and cruise control. Due to its high performance and low cost, the HCPL-6251 optoisolator is suitable for a wide range of applications. It is optimized for low-current switching, high-current switching, and high-frequency operation. It provides an isolation level of up to 1600 Volts, making it ideal for working with both low-voltage and High-voltage circuits.The working principle of the HCPL-6251 optoisolator is based on the principle of phototransistors, which are used to detect light signals. When the LED emits light, it is detected by the phototransistor in the detector circuit. This results in the generation of a voltage, which is then used to control the logic levels of the optoisolator. This voltage is amplified and then sent to the output driver circuit, which then sends the logic level signals to inputs of the microcontroller, digital logic circuits, or other optoisolator circuits.The HCPL-6251 optoisolator device is capable of providing a wide range of operation, including low-current switching, high-current switching, and high-frequency operation. The device is designed to be easy to use and has a low power consumption. It is also non-polarized and can be used in a wide range of AC and DC applications, making it an ideal choice for a variety of applications.

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