HCPL-570K

Transistor, Photovoltaic Output Optoisolators Overview

The HCPL-570K is a single-channel, hermetically sealed logic output optocoupler from Broadcom Limited. It features an 8-pin DIP ceramic package and Class K reliability. Key electrical parameters include a minimum Current Transfer Ratio (CTR) of 200% at 5 mA input current, with a maximum CTR of 1500%. The device supports a maximum continuous output current of 40 mA and has a power dissipation rating of 200 mW. Typical switching times are 2 µs for turn-on and 8 µs for turn-off. The isolation voltage is 1500 VDC. Operating temperatures range from -55°C to +125°C.

Transistor, Photovoltaic Output Optoisolators Feature Summary

• Hermetically sealed construction in an 8-pin DIP ceramic package ensuring high reliability
• Class K reliability level suitable for demanding applications
• Logic output configuration with open collector Darlington transistor output
• High current transfer ratio capability for efficient signal transmission

Transistor, Photovoltaic Output Optoisolators Applications

• Industrial control systems requiring galvanic isolation
• Power supply feedback loops
• Microprocessor interface circuits
• Signal isolation in noisy environments

Transistor, Photovoltaic Output Optoisolators Procurement Notes

Verify the specific suffix code when ordering, as it indicates packaging or reel specifications. Confirm that the required CTR meets the application's minimum threshold, as values vary. Ensure the procurement source provides valid RoHS compliance documentation if required by the design. Check lead times as production cycles may vary. Validate that the hermetic seal integrity is maintained during handling and assembly processes.

Transistor, Photovoltaic Output Optoisolators Selection Notes

Select this component when high reliability and hermetic sealing are critical requirements. The Class K rating makes it suitable for aerospace or military-grade applications where standard plastic packages are insufficient. Consider the 200% minimum CTR for robust signal coupling. The wide operating temperature range supports extreme environmental conditions. Verify that the 40 mA output current capability matches the load requirements of the downstream circuitry.

Transistor, Photovoltaic Output Optoisolators Part Context

The HCPL-570K belongs to the HCPL-570x family of high-speed logic output optocouplers. This series includes variants like HCPL-5700 and HCPL-5702, differing primarily in channel count and specific performance metrics. The HCPL-570K is distinguished by its single-channel configuration and hermetic ceramic packaging, offering superior protection against moisture and contaminants compared to non-hermetic alternatives.

Transistor, Photovoltaic Output Optoisolators Replacement Considerations

Direct replacements within the same family include HCPL-5700#300, which shares similar electrical characteristics but may differ in packaging details. Verify pinout compatibility and ensure the substitute maintains the required hermetic seal and Class K reliability rating. Cross-reference datasheets for exact switching time and CTR specifications to guarantee functional equivalence.