SFH6139

Overview

The SFH6139 is a high-speed optocoupler featuring a Darlington transistor output with base access, manufactured by Vishay Semiconductor Opto Division. It provides an isolation voltage of 5300Vrms and supports a maximum output voltage of 18V. The device operates with a DC input type and delivers a minimum current transfer ratio of 400% at 1.6mA forward current. Typical switching times are 600ns for turn-on and 1.5µs for turn-off. It functions within a temperature range of -55°C to 100°C and is available in an 8-SMD鸥翼 package.

Feature Summary

• High isolation voltage capability of 5300Vrms for robust electrical separation
• Darlington output configuration with accessible base terminal for enhanced control
• High current transfer ratio ensuring efficient signal transmission at low input currents
• Designed for low power logic applications involving CMOS and low power TTL

Applications

• Low power logic interface circuits
• CMOS and low power TTL interfacing
• General purpose digital isolation

Procurement Notes

Verify component status as the SFH6139 may be listed as obsolete or end-of-life depending on the specific distribution channel and date. Confirm availability of alternative packages such as the X017T variant if standard stock is unavailable. Ensure compliance with RoHS3 specifications and check for any recent product change notices regarding manufacturing origin or labeling updates before finalizing procurement plans.

Selection Notes

Select this component when high gain and low input current requirements are critical for system efficiency. The integrated Darlington structure offers superior current amplification compared to standard transistor outputs. Consider the base pin accessibility for potential speed optimization or linear operation needs. Verify that the 18V output voltage limit aligns with the downstream circuitry requirements.

Part Context

The SFH6139 belongs to Vishay's family of high-speed optocouplers designed for reliable digital signal isolation. It complements similar models like the SFH6138, offering distinct output characteristics tailored for specific logic levels. This series emphasizes low power consumption while maintaining high isolation integrity, making it suitable for compact electronic designs requiring galvanic separation.

Replacement Considerations

Check for direct substitutes such as the SFH6138 if pin compatibility and functional equivalence are required. Evaluate other Vishay variants within the same high-speed optocoupler lineup for potential drop-in replacements. Always verify datasheet parameters against the original design specifications before implementing any substitute component.

FAQ

What is the typical current transfer ratio for the SFH6139?

The SFH6139 guarantees a minimum current transfer ratio of 400% when tested at a forward current of 1.6mA.

Does the SFH6139 have a base connection?

Yes, the device features a Darlington output with an accessible base terminal, allowing for additional control over the output stage.