PS9121-F3-A

Logic Output Optoisolators Overview

The PS9121-F3-A is a high-speed, active-low type optically coupled isolator manufactured by CEL. It integrates an AlGaAs LED on the input side with a photodiode and output circuitry to provide electrical isolation. The device features a 3.75kV isolation voltage rating and is housed in a compact 5-SO package. Key electrical specifications include a common mode transient immunity of 15kV/µs and a data rate capability of up to 15 Mbps. This component is designed for applications requiring reliable signal transmission across isolated boundaries with high noise immunity.

Logic Output Optoisolators Feature Summary

• High-speed operation with 15 Mbps data rate capability
• Active-low logic output configuration
• Robust common mode transient immunity of 15kV/µs
• Compact 5-SO surface mount packaging

Logic Output Optoisolators Applications

• Industrial communication interfaces
• Microprocessor system isolation
• Signal transmission in noisy environments

Logic Output Optoisolators Procurement Notes

Verify part status carefully as this specific variant may be obsolete or discontinued. Confirm availability through authorized distributors or check for valid replacement components from Renesas Electronics America. Ensure the source documentation matches the exact part number suffix to guarantee correct functional specifications and pinout compatibility.

Logic Output Optoisolators Selection Notes

Select this component when high-speed digital isolation is required with active-low output logic. Consider the 3.75kV isolation rating and 15kV/µs CMTI for robust performance in electrically noisy industrial settings. Verify package constraints and ensure the 5-SO form factor fits the design layout. Check current manufacturing status due to potential obsolescence.

Logic Output Optoisolators Part Context

The PS9121 series represents a family of high-speed optoisolators from CEL, now under Renesas Electronics America. These devices are engineered for efficient signal transfer between isolated circuits using AlGaAs LED technology. The PS9121-F3-A specifically denotes the version with F3 packaging and active-low functionality within this product line.

Logic Output Optoisolators Replacement Considerations

Similar substitutes may be available from Renesas Electronics America. Verify functional equivalence regarding speed, isolation voltage, and output logic state before substitution.