HCPL-817-00DE

Optoisolators - Transistor, Photovoltaic Output

The HCPL-817-00DE is a transistor output optoisolator with photovoltaic input. It is designed to provide electrical isolation and signal transmission between two circuits. The device uses a light-activated phototransistor to block or allow the flow of current in a circuit, depending on the amount of light received.

The HCPL-817-00DE is used in many applications, including medical applications such as patient monitoring, industrial automation, switching control, and process control. The primary advantage of optoisolators is that they allow isolation of signals between two different circuits, even when the circuits are running at different voltages or have different ground references. This provides an extra layer of protection that prevents the interference and damage that can be caused by signal crosstalk.

The HCPL-817-00DE is a bilateral device that responds to both positive and negative logic signals. It is a low voltage device, operating from 4.5V to 16V, making it suitable for use in portable systems. The device has a low power dissipation of just 5 mW and is both UL and CSA approved.

The HCPL-817-00DE is a 4-pin device, with a photovoltaic input and an opencollector output transistor. The photovoltaic input is the device’s light sensitive element and is directly exposed to light/IR. When the device receives infrared radiation, it will generate a proportional electrical current at its output transistor. The output current is proportional to the intensity and duration of the received light.

The output of the HCPL-817-00DE opto-isolator is an open collector NPN phototransistor. It operates as either an "on" or "off" switch, switching between a low resistance (on state) and a high impedance (off state). The output transistor can handle a maximum collector current of 100mA and a maximum collector-emitter voltage of 30V. The output can be used to control an LED, solenoid, an opto-coupler, etc.

The HCPL-817-00DE is designed to tolerate high ESD voltages (2.5kV) and temperature fluctuations from -55°C to +105°C. It has a very low current leakage (less than 10nA) and a photo-sensitivity level of 0.45 mA/mW, making it very reliable in a range of applications. It is highly reliable, efficient, and cost-effective, making it a popular choice for many applications.

In summary, the HCPL-817-00DE is a reliable and cost-effective optoisolator with photovoltaic input and transistor output. It allows electrical isolation and signal transmission between two circuits and is suitable for a range of applications, including medical, industrial automation, switching control, and process control. The device is UL and CSA approved, has a low power dissipation, and can tolerate high ESD voltages and temperature fluctuations. It is a popular choice for many applications due to its efficiency and reliability.