SFH6756T

Logic Output Optoisolators Overview

The SFH6756T is a dual-channel high-speed logic output optocoupler manufactured by Vishay Semiconductor Opto Division. It features an open-drain output configuration with a maximum output current of 50 mA per channel and supports data rates up to 10 MBd. The device provides 4000 Vrms isolation voltage and a common-mode transient immunity (CMTI) of 5 kV/µs. It operates on a supply voltage range of 4.5 V to 5.5 V, compatible with +5 V CMOS logic. The unit functions within a temperature range of -40°C to +100°C and is housed in an 8-SOIC surface-mount package.

Logic Output Optoisolators Feature Summary

• Dual-channel architecture providing independent signal isolation for two separate circuits within a single compact package.
• High-speed digital transmission capability supporting data rates up to 10 MBd for efficient communication.
• Robust electromagnetic compatibility characterized by 5 kV/µs common-mode transient immunity to prevent noise-induced errors.
• CMOS-compatible open-drain outputs designed for direct interfacing with standard digital logic systems.

Logic Output Optoisolators Applications

• Industrial automation control systems requiring galvanic isolation between microcontrollers and actuators
• Communication interfaces such as RS-485 and CAN bus networks for noise reduction
• Medical equipment power supplies ensuring patient safety through strict isolation barriers
• Switching mode power supplies (SMPS) for feedback loop isolation

Logic Output Optoisolators Procurement Notes

Verify the specific suffix designation against official Vishay documentation to confirm the exact CMTI rating, as the SFH6756 series includes variants with different immunity levels. Ensure the procurement source provides valid UL certification records if regulatory compliance is required for the end application. Confirm the package type matches the 8-SOIC specification to guarantee proper footprint compatibility during assembly.

Logic Output Optoisolators Selection Notes

Select this component when dual-channel isolation is necessary within a constrained board area. The 5 kV/µs CMTI rating makes it suitable for noisy industrial environments where standard optocouplers may fail. Consider the 10 MBd speed limit when designing high-frequency data links. Verify that the system's ground potential differences do not exceed the 4000 Vrms isolation limit under fault conditions.

Logic Output Optoisolators Part Context

This part belongs to the SFH675x family of high-speed optocouplers from Vishay. The family shares similar SOIC-8 packaging and 10 MBd performance characteristics but varies in channel count and common-mode transient immunity ratings. The SFH6756T specifically addresses applications needing two isolated channels with moderate noise immunity requirements compared to higher-rated siblings.

Logic Output Optoisolators Replacement Considerations

Check datasheets for SFH6755T or SFH6757T to verify pinout compatibility and functional equivalence. Ensure substitute parts meet the same 4000 Vrms isolation and 10 MBd speed requirements. Validate that any alternative maintains the 8-SOIC package dimensions for direct replacement without PCB redesign.