HCPL3700W

Transistor, Photovoltaic Output Optoisolators Overview

The HCPL3700W is an AC/DC to Logic Interface Optocoupler manufactured by onsemi. It features a single channel with a Darlington output configuration housed in an 8-DIP package. The device supports AC or DC input signals and provides logic level compatibility. Key electrical parameters include a maximum continuous output current of 30 mA, a typical rise time of 45 μs, and a typical fall time of 0.5 μs. It operates within a temperature range of -40°C to +85°C and offers isolation voltage ratings up to 5000 Vrms depending on the specific suffix variant.

Transistor, Photovoltaic Output Optoisolators Feature Summary

• Integrates an aluminum gallium arsenide LED with a threshold detection input buffer IC for flexible threshold adjustment via a single resistor.
• Provides programmable detection voltage capabilities suitable for wide input voltage ranges.
• Features a high-gain Darlington output compatible with TTL and CMOS logic levels.

Transistor, Photovoltaic Output Optoisolators Applications

• Low voltage detection circuits
• AC/DC voltage detection within 5V to 240V ranges
• Relay contact monitoring systems
• Current sensing applications
• Microprocessor interface circuits

Transistor, Photovoltaic Output Optoisolators Procurement Notes

Verify the specific suffix (e.g., W, M, SDM) to confirm package type, isolation rating, and operating temperature range. Confirm RoHS compliance status through official datasheets. Check for end-of-life notices as some variants may be discontinued. Ensure the selected variant meets the required isolation voltage for your safety standards.

Transistor, Photovoltaic Output Optoisolators Selection Notes

Select based on required isolation voltage, which varies between 2500 Vrms and 5000 Vrms across the series. Choose the appropriate package style (PDIP or SMD) and temperature range (-40°C to +85°C or 0°C to +70°C). Ensure the programmable threshold feature aligns with the input signal characteristics and noise immunity requirements of the application.

Transistor, Photovoltaic Output Optoisolators Part Context

The HCPL3700W belongs to the HCPL3700 series of AC/DC to Logic Interface Optocouplers. This family is designed for applications requiring precise threshold detection and logic interfacing from analog or switching inputs. The series combines optical isolation with integrated circuitry for enhanced functionality compared to standard optocouplers.

Transistor, Photovoltaic Output Optoisolators Replacement Considerations

Direct substitutes include other HCPL3700 variants such as HCPL3700M, HCPL3700SDM, and HCPL3700VM, provided they match the required package, isolation rating, and temperature specifications. Verify pinout compatibility and electrical parameters before substitution.

Transistor, Photovoltaic Output Optoisolators FAQ

What is the function of the internal input buffer in the HCPL3700W?

The internal input buffer allows for flexible threshold level adjustment using a single external resistor, enabling programmable detection voltage for various input signal types.

Is the HCPL3700W output compatible with standard logic families?

Yes, the Darlington output is compatible with both TTL and CMOS logic levels.