onsemi

BAT54S

BAT54S Description

The BAT54S from onsemi is a Schottky diode array configured as 1 pair series connection, designed for high-efficiency, low-power applications. This surface-mount (SOT-23) device offers a 30V maximum reverse voltage (Vr) and a forward voltage (Vf) of 800mV at 100mA, ensuring minimal power loss. With a reverse recovery time (trr) of just 5ns, it excels in high-speed switching circuits. The diode array is optimized for small-signal applications (≤200mA) and features low reverse leakage (2µA @ 25V), making it ideal for precision circuits. Although marked as obsolete, its robust performance and REACH compliance ensure continued relevance in legacy designs.

BAT54S Features

• Schottky Technology: Delivers fast switching and low forward voltage drop.
• High-Speed Performance: 5ns reverse recovery time for efficient switching applications.
• Low Leakage: 2µA @ 25V ensures minimal power dissipation in standby modes.
• Compact SOT-23 Package: Space-saving surface-mount design for PCB integration.
• Series-Connected Pair: Simplifies circuit design for dual-diode requirements.
• Wide Operating Range: 30V Vr and 200mA average rectified current per diode.
• MSL 1 (Unlimited): Suitable for extended storage without moisture sensitivity concerns.

BAT54S Applications

The BAT54S is particularly suited for:

• Signal Demodulation: Fast switching enables accurate RF and audio signal processing.
• Power OR-ing Circuits: Low Vf reduces voltage drop in redundant power systems.
• Protection Clamping: Guards sensitive ICs against voltage transients.
• High-Speed Logic Gates: Used in diode-based logic families for low propagation delay.
• Portable Electronics: Ideal for battery-powered devices due to low leakage and compact size.

Conclusion of BAT54S

The BAT54S stands out for its fast switching, low power loss, and compact form factor, making it a reliable choice for high-frequency and low-voltage applications. While obsolete, its performance metrics (e.g., 5ns trr, 800mV Vf) remain competitive, particularly in legacy or cost-sensitive designs. Engineers favor it for space-constrained, high-efficiency circuits where Schottky advantages are critical. For modern alternatives, consider onsemi’s updated diode arrays, but the BAT54S remains a proven solution for niche requirements.