PS9121-F3-AX

Logic Output Optoisolators Overview

The PS9121-F3-AX is a high-speed optocoupler manufactured by Renesas Electronics Corporation, housed in an SO-5 surface-mount package. It features a single channel with a 3750 Vrms isolation voltage and a minimum common-mode transient immunity of 15 kV/µs. The device operates with a forward current of 10 mA and a typical forward voltage of 1.65 V. Electrical performance includes a rise time of 20 ns and a fall time of 5 ns, supporting data rates up to 15 Mbps. The output stage provides a maximum output current of 25 mA with a power dissipation rating of 40 mW.

Logic Output Optoisolators Feature Summary

• Integrates a GaAlAs LED input side with an active low photo IC output for signal isolation.
• Provides high common-mode transient immunity to ensure reliable operation in noisy environments.
• Features fast switching characteristics with nanosecond-level rise and fall times.

Logic Output Optoisolators Applications

• High-speed digital signal isolation in industrial control systems
• Data communication interfaces requiring galvanic isolation
• Microcontroller input/output isolation in embedded systems

Logic Output Optoisolators Procurement Notes

Verify the specific suffix AX against official Renesas documentation to confirm packaging and tape-and-reel specifications. Ensure compatibility with SO-5 footprint requirements during PCB layout. Confirm RoHS compliance status through the latest datasheet revision. Cross-reference the manufacturer part number with authorized distributor catalogs to validate authenticity and supply chain integrity before procurement.

Logic Output Optoisolators Selection Notes

Select this component when high-speed signal transmission is required alongside robust electrical isolation. The 15 kV/µs CMTI rating makes it suitable for applications with significant noise interference. Compare the 10 mA forward current requirement against system drive capabilities. Evaluate the 3750 Vrms isolation voltage against safety standards applicable to the target equipment design.

Logic Output Optoisolators Part Context

This component belongs to the PS9121 series of high-speed optocouplers from Renesas Electronics. It is designed as a direct replacement for legacy high-speed isolators in compact surface-mount designs. The SO-5 package allows for space-constrained layouts while maintaining high isolation performance. It serves as a key interface component between low-voltage logic circuits and higher-voltage or noisy domains.

Logic Output Optoisolators Replacement Considerations

PS9121-V-F3-AX is a documented variant within the same product family.