Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

Optoisolators - Logic Output

HCPL-2212#500 Application Field and Working Principle

Optoisolators (Opto-Couplers) are widely used in many applications such as providing galvanic insulation, secure communication, and a reliable sensing of input logic levels.

The HCPL-2212#500 optoisolator from Avago is one such device which is specifically targeted for logic level output applications. It features an integrated high speed logic gate optically isolated from the input logic pin. It is able to drive a TTL or CMOS logic level output with a maximum logic output of 8 mA. The HCPL-2212#500 has an open collector output that enables wired-OR applications.

The HCPL-2212#500 has an input voltage range from 3.8V to 5.5V. The threshold of the output is typically 1.8V and the high voltage is typically 3.5V and can reach up to 5V (at <1 mA). The output is very low noise, with a typical rise and fall times of 0.8 and 1.2 µs, respectively.

The HCP-2212#500 device is composed of two basic elements. The first element is an infrared LED which serves as an optical emitting device, and the second element is an integrated high speed logic gate. The LED is powered from the logic signal at the input. The logic input can be either a TTL or CMOS type logic level, which is optically coupled to the integrated high speed logic gate. The optocoupler then drives the output logic level to a TTL or CMOS level depending on the specified output.

The logic output current capability of the HCPL-2212#500 depends on the input voltage. It has a maximum output of 8 mA and can go up to 20 mA at 4.5V. Furthermore, the HCPL-2212#500 has a built-in open collector output which can enable wired OR applications. The open collector feature enables multiple devices to be connected together using a common logic input.

The HCPL-2212#500 also has two types of common Usages in applications. The first type of application is used when the output signal has to be isolated from the input circuit, which can be useful in ground loop applications. The second type of application is when a logic Level is to be sensed. This is very common in automotive and industrial applications where a sensor is used to detect a logic level — for instance a low-voltage signal or a high-voltage signal.

In conclusion, the HCPL-2212#500 logic output optoisolator device is a great choice for applications that require a logic level output with a wired-OR capability. It is very robust and offers a wide voltage and current range. The open collector output makes it suitable for multiple connection with a common logic input.

The specific data is subject to PDF, and the above content is for reference