OPI126

Overview

The OPI126 is a logic output optoisolator manufactured by TT Electronics/Optek Technology. It features an open collector output configuration with a high isolation voltage of 15000VDC and supports a data rate of 250kbps. The device provides common mode transient immunity (CMTI) for reliable signal transmission in electrically noisy environments.

Feature Summary

• Logic output design with open collector configuration
• High isolation voltage rating of 15000VDC
• Supports data rates up to 250kbps
• Engineered for high common mode transient immunity

Applications

• Digital signal isolation in noisy industrial environments
• Microcontroller interface circuits requiring galvanic isolation
• Logic level translation between different voltage domains

Procurement Notes

Verify the specific suffix or variant code when ordering, as manufacturers often use suffixes to denote packaging or environmental ratings. Confirm that the open collector output type matches the target circuit requirements. Ensure the 15000VDC isolation rating meets the safety standards of the final application. Cross-reference the datasheet for pinout compatibility if replacing existing components.

Selection Notes

Select this component when high-voltage isolation is required alongside digital logic interfacing. The open collector output necessitates an external pull-up resistor for proper operation. Consider the 250kbps speed limit when designing for higher frequency applications. Verify that the CMTI specifications are sufficient for the noise levels present in the system environment.

Part Context

This part belongs to the OPI series of optoisolators from TT Electronics/Optek Technology. The series includes variants such as the OPI125TX and OPI127, which may offer different output types or speeds. These devices are designed for robust performance in applications demanding significant electrical separation between input and output circuits.

Replacement Considerations

Public confirmed substitute part numbers: OPI125TX, OPI127.