ACPL-177KL

Transistor, Photovoltaic Output Optoisolators Overview

The ACPL-177KL is a high-reliability Class K hermetically sealed quad-channel logic output optocoupler manufactured by Broadcom. It utilizes a 16-pin ceramic DIP package with options for gold-plated or solder-dipped leads. The device operates across the full military temperature range of -55°C to +125°C and complies with MIL-PRF-38534 standards. Each channel integrates a GaAsP LED coupled to a high-gain photodetector with an open-collector output, ensuring low saturation voltage and high transmission rates. It supports a supply voltage as low as 3.0V, achieving a minimum current transfer ratio (CTR) of 300% at an input current of 0.5mA, with an isolation voltage of 1500Vdc.

Transistor, Photovoltaic Output Optoisolators Feature Summary

• Class K reliability compliant with MIL-PRF-38534 for harsh environments
• Hermetically sealed 16-pin ceramic DIP construction
• Low saturation voltage and high signal transmission speed via open-collector outputs
• Operational stability across the complete military temperature spectrum

Transistor, Photovoltaic Output Optoisolators Applications

• Military and aerospace systems
• High-reliability industrial control
• Microprocessor system interfaces
• Medical equipment requiring strict isolation

Transistor, Photovoltaic Output Optoisolators Procurement Notes

Verify the specific lead finish option (gold-plated or solder-dipped) required for your assembly process. Confirm that the Class K qualification meets your project's reliability standards. Ensure the 16-pin ceramic DIP footprint matches your PCB design constraints. Validate that the 1500Vdc isolation rating satisfies your safety requirements. Check for any specific handling instructions regarding the hermetic seal integrity during installation.

Transistor, Photovoltaic Output Optoisolators Selection Notes

Select this component when mission-critical reliability in extreme temperatures is mandatory. The quad-channel configuration reduces board space compared to single-channel alternatives. The low input current requirement aids in power-constrained designs. The open-collector output simplifies interfacing with various logic families. Consider the ceramic package for superior thermal and mechanical stability over plastic variants.

Transistor, Photovoltaic Output Optoisolators Part Context

This part belongs to Broadcom's high-reliability optocoupler family designed for defense and aerospace applications. It shares architectural similarities with other Class K devices like the ACPL-573KL but offers four channels instead of two. The series emphasizes robust isolation and performance under severe environmental stress, distinguishing it from commercial-grade optocouplers used in general consumer electronics.

Transistor, Photovoltaic Output Optoisolators Replacement Considerations

Direct substitutes include other Class K quad-channel optocouplers meeting MIL-PRF-38534 specifications. Verify pinout compatibility before substitution. Ensure the replacement maintains the same 16-pin ceramic DIP form factor. Confirm equivalent isolation voltage and temperature range ratings are met.

Transistor, Photovoltaic Output Optoisolators FAQ

What is the maximum operating temperature for the ACPL-177KL?

The device is rated for operation up to +125°C, covering the full military temperature range.

Does the ACPL-177KL use a plastic or ceramic package?

It uses a hermetically sealed 16-pin ceramic DIP package.

What is the minimum current transfer ratio specified?

The minimum CTR is 300% when the input current is 0.5mA.