APS1551SZ

Overview

The APS1551SZ is a high-speed optocoupler manufactured by Panasonic Industrial Devices. It features a single channel with a data rate of 50 Mbps and an isolation voltage of 3750 Vrms. The device utilizes an AlGaAs LED and PhotoIC, housed in a compact 4.4x4.3x2.1mm package. Key electrical parameters include a forward current of 25 mA, forward voltage of 1.6 V, and output current of 10 mA. Rise and fall times are typically 4 ns and 5 ns respectively. It operates within a temperature range of -40°C to +105°C and has a power dissipation of 40 mW.

Feature Summary

• High-speed signal transmission capability at 50 Mbps for efficient data isolation.
• Robust electrical isolation with 3750 Vrms rating to protect sensitive circuits.
• Compact surface-mount design suitable for space-constrained applications.

Applications

• Industrial communication interfaces requiring galvanic isolation
• Data acquisition systems needing high-speed signal transfer
• Power supply feedback loops for isolated control signals

Procurement Notes

Verify the specific suffix 'S' indicates tape-and-reel packaging versus tube packaging if applicable. Confirm RoHS compliance status through official documentation. Check for NRND (Not Recommended for New Designs) status which may impact long-term availability. Ensure lead-free soldering profiles align with component specifications during assembly processes.

Selection Notes

Select this component when high-speed digital isolation is required alongside moderate current drive capabilities. Consider the 15kV/µs common-mode transient immunity for noisy environments. Evaluate thermal management needs given the 40 mW power dissipation limit. Compare against alternative packages if board space constraints differ from the standard SOP-5 form factor.

Part Context

This part belongs to the APS series of high-speed optocouplers from Panasonic. It represents a solution for isolating digital signals in modern electronic systems where speed and reliability are critical. The series typically offers various insulation voltages and data rates to suit different application requirements across industrial and consumer electronics sectors.

Replacement Considerations

Check Panasonic's official cross-reference lists for direct replacements. Verify pinout compatibility and electrical parameter equivalence before substituting. Ensure any alternative component meets the same isolation voltage and data rate specifications to maintain system integrity.