HSCH-5531

RF Diode Overview

The HSCH-5531 is a dual beam lead Schottky diode pair manufactured by Broadcom Limited, designed for microwave mixer and detector applications. It features a low barrier configuration with a minimum breakdown voltage of 20 V and a maximum dynamic resistance of 3 Ω at 5 mA forward current. The device exhibits a maximum total capacitance of 0.10 pF at 0 V reverse bias and 1 MHz frequency. Maximum forward voltage is 375 mV at 1 mA, with a maximum leakage current of 400 nA at 1 V reverse bias. Power dissipation is rated at 150 mW CW, operating within a temperature range of -65°C to +175°C.

RF Diode Feature Summary

• Monolithic pair construction ensures closely matched electrical parameters between the two diodes.
• Platinum tri-metal system provides high temperature stability and rugged mechanical construction.
• Silicon nitride passivation layer offers immunity from contaminants to prevent IR drift.
• Polyimide scratch protection enhances reliability during handling and assembly.

RF Diode Applications

• Balanced mixers and even harmonic anti-parallel pair mixers
• Bridge quads, star quads, and ring quads for double balanced mixers
• Stripline, microstrip, or coplanar waveguide circuits

RF Diode Procurement Notes

Verify component authenticity through authorized distributors as the HSCH-5531 may be subject to obsolescence status. Confirm lot traceability and ensure ESD-safe handling protocols are strictly followed during receipt and storage. Review specific ordering suffixes for any variations in packaging or testing standards before finalizing procurement orders.

RF Diode Selection Notes

Select the HSCH-5531 when a low barrier characteristic is required for mixer applications compared to medium barrier alternatives like the HSCH-5512. Ensure circuit designs accommodate the 3 Ω dynamic resistance and 0.10 pF capacitance specifications. Verify that the mounting process utilizes thermocompression bonding or conductive epoxy compatible with beam lead devices to maintain structural integrity.

RF Diode Part Context

The HSCH-5531 belongs to the HSCH-55XX series of beam lead Schottky diodes originally developed by Avago Technologies (now Broadcom). This series is engineered for K-band microwave frequencies, providing uniform dimensions and repeatable RF characteristics. The technology utilizes advanced epitaxial techniques to ensure planar passivation and consistent performance across production batches.

RF Diode Replacement Considerations

The HSCH-5512 is a documented alternative within the same series featuring a medium barrier configuration. Substitution requires evaluating differences in dynamic resistance (16 Ω vs 3 Ω) and forward voltage characteristics to ensure compatibility with the existing mixer topology and impedance matching requirements.