APS1551SX

Overview

The APS1551SX is a high-speed logic output optoisolator manufactured by Panasonic Electric Works. It integrates an AlGaAs LED with a PhotoIC sensor and signal processor to provide electrical insulation while transmitting data at speeds up to 50Mbps. The device features a push-pull/totem pole TTL output capable of sourcing or sinking 10mA, with a maximum output power dissipation of 40mW. It offers a robust isolation voltage of 3,750Vrms and a common mode transient immunity of 15kV/µs. The component is housed in a compact 6-SO package measuring 4.4mm x 4.3mm with a height of 2.1mm.

Feature Summary

• Integrates AlGaAs LED and PhotoIC for high-speed signal transmission up to 50Mbps
• Provides electrical insulation with 3,750Vrms isolation voltage and 15kV/µs common mode transient immunity
• Features push-pull/totem pole TTL output logic for direct interface with digital circuits

Applications

• Motor control systems
• Programmable Logic Controller (PLC) interfaces
• Industrial equipment communication links

Procurement Notes

Verify the specific suffix designation against official Panasonic documentation to ensure correct output configuration and packaging specifications. Confirm that the requested part matches the required isolation voltage and data rate parameters for the intended application environment. Cross-reference the manufacturer part number with authorized distributor catalogs to validate authenticity and traceability before finalizing procurement orders.

Selection Notes

Select this component when high-speed data transfer is required alongside significant electrical isolation between circuit sections. The integrated signal processor simplifies design by eliminating external components typically needed for standard optocouplers. Ensure the system operates within the specified 40mW output power dissipation limit and utilizes the compact footprint suitable for space-constrained industrial layouts.

Part Context

This device belongs to the APS1/APS2 PhotoIC coupler series designed for industrial applications. Unlike traditional optocouplers, it combines the light emitter and receiver on a single chip with embedded processing. This integration enables faster response times and higher noise immunity compared to discrete photodiode-based isolators, making it suitable for demanding digital communication protocols.

Replacement Considerations

The APS1551SZ is a documented variant within the same product family. Verify if the SZ suffix indicates identical performance characteristics or specific packaging differences. Consult official substitution guides to confirm compatibility regarding pinout, electrical ratings, and thermal requirements before replacing the SX variant.