APS1551S

Overview

The APS1551S is a high-speed PhotoIC coupler from Panasonic Industrial Devices, featuring an AlGaAs LED and integrated signal processing. It provides one channel with a data rate of 50 Mbps and isolation voltage of 3750 Vrms. The device uses a push-pull totem pole output capable of sourcing 10 mA. Key electrical parameters include a forward current of 25 mA, forward voltage of 1.6 V, reverse voltage of 5 V, and power dissipation of 40 mW. Rise and fall times are 4 ns and 5 ns respectively, with propagation delays up to 30 ns. Operating temperature ranges from -40°C to +105°C in a compact SMD package.

Feature Summary

• Integrates AlGaAs LED with smart photo sensor and signal processor for high-speed communication
• Provides electrical insulation with high noise immunity and 3750 Vrms isolation voltage
• Utilizes totem pole TTL output logic for direct interfacing with digital circuits

Applications

• Motor control systems
• Programmable Logic Controller (PLC) interfaces
• Industrial equipment signal transmission

Procurement Notes

Verify the component lifecycle status carefully before procurement, as this part is designated as NRND (Not Recommended for New Designs). Confirm that existing inventory meets project requirements without relying on future manufacturing availability. Ensure compatibility with current design constraints given the potential discontinuation risk associated with this specific series designation.

Selection Notes

Select this component when high-speed data transfer at 50 Mbps is required within a compact 4.4x4.3x2.1mm footprint. The integrated signal processor eliminates the need for external buffering, simplifying circuit design. Consider the wide operating temperature range suitable for industrial environments. Verify that the 3750 Vrms isolation rating aligns with safety standards for the intended application.

Part Context

This device belongs to the APS1/APS2 PhotoIC Coupler series by Panasonic Industrial Devices. These components combine optical isolation with internal signal conditioning to achieve speeds up to 50 Mbps. The series is designed for robust performance in noisy industrial settings, offering superior common-mode transient immunity compared to standard optocouplers.

Replacement Considerations

Public confirmed substitute part numbers: None identified.