ILQ74

Transistor, Photovoltaic Output Optoisolators Overview

The ILQ74 is a quad-channel through-hole optocoupler manufactured by Isocom Components, utilizing the Vishay ILQ series design. It features four independent phototransistor outputs driven by infrared LEDs within a 16-pin PDIP package. The device provides high isolation voltage of 5300 Vrms and supports a maximum forward current of 60 mA. Key electrical parameters include a minimum current transfer ratio of 12.5% and a maximum of 35%. It operates with DC input signals and is designed for robust signal transmission across isolated circuits.

Transistor, Photovoltaic Output Optoisolators Feature Summary

• Quad-channel configuration providing four independent isolation barriers in a single package
• High isolation voltage capability ensuring safe separation between input and output circuits
• Phototransistor output stage suitable for digital signal interfacing
• Through-hole mounting for reliable mechanical stability in industrial applications

Transistor, Photovoltaic Output Optoisolators Applications

• Industrial control systems requiring multi-channel signal isolation
• Data communication interfaces needing galvanic separation
• Power supply feedback loops for safety compliance
• Microcontroller I/O expansion with isolated inputs

Transistor, Photovoltaic Output Optoisolators Procurement Notes

Verify the manufacturer designation on the component marking, as Isocom Components often distributes Vishay-branded devices. Confirm the specific suffix or tape-and-reel option if required for automated assembly. Ensure the procurement documentation explicitly states the 16-pin PDIP package and the 5300 Vrms isolation rating to avoid substitution errors with lower-isolation variants.

Transistor, Photovoltaic Output Optoisolators Selection Notes

Select this component when multiple isolated channels are needed in a compact through-hole footprint. The quad-channel design reduces board space compared to using four separate single-channel optocouplers. Consider the 12.5% to 35% CTR range for circuit design margins. Ensure the application voltage does not exceed the device's isolation ratings and that the PCB layout accommodates the 16-pin DIP spacing.

Transistor, Photovoltaic Output Optoisolators Part Context

The ILQ74 belongs to the Vishay ILQ series of quad-channel optocouplers, widely used in industrial automation. Isocom Components acts as a distributor for these Vishay-designed devices. This series is recognized for its reliability in harsh environments and compliance with international safety standards. The 16-pin PDIP format remains a standard choice for prototyping and legacy system maintenance.

Transistor, Photovoltaic Output Optoisolators Replacement Considerations

Direct substitutes include other quad-channel DIP optocouplers with similar isolation ratings, such as the HCPL-2630 or PC900 series. Verify pin compatibility and current transfer ratio specifications before substitution. Ensure the replacement part meets the same safety certification requirements for the target application.