OPI1268

Overview

The OPI1268 is a high-voltage digital isolator featuring a single channel and five pins. It provides 16 kV DC isolation between input and output circuits. The device supports data transmission rates up to 2 Mbps with propagation delays of 500 ns or less. It utilizes a GaAlAs LED input coupled to an optical IC output, delivering a TTL-compatible open collector inverter signal. The unit operates within a temperature range of -50°C to 100°C.

Feature Summary

• Provides high voltage isolation for DC and AC circuit separation while maintaining signal integrity.
• Capable of high-speed digital data transmission using an integrated optical coupling mechanism.
• Delivers a stable digital output with an open collector inverter configuration compatible with TTL logic.

Applications

• Data transmission systems requiring high voltage isolation
• PC board power system isolation
• Industrial equipment power isolation
• Medical equipment power isolation
• Office equipment isolation

Procurement Notes

Verify the specific suffix designation when ordering, as variants such as OPI1268S exist with potentially different packaging or certification attributes. Confirm that the required isolation voltage and speed meet the application specifications before procurement. Ensure compatibility with the intended operating temperature range and interface requirements.

Selection Notes

Select this component when high voltage isolation combined with moderate-speed digital signaling is required. The open collector output necessitates appropriate pull-up resistor selection for the target logic level. Consider the physical dimensions and through-hole mounting style during PCB layout planning to ensure adequate creepage and clearance distances are maintained.

Part Context

The OPI1268 belongs to the OPI series of high-voltage optoisolators manufactured by TT Electronics/Optek Technology. This series is designed to replace traditional transformers or relays in applications requiring electrical isolation. The device integrates a high-efficiency infrared LED with a specialized output IC to achieve reliable performance in noisy environments.

Replacement Considerations

Public confirmed substitute part numbers: None identified.