HSMP-489B-BLKG

RF Diode Overview

The HSMP-489B-BLKG is a surface mount RF PIN switch diode from Broadcom Limited, belonging to the HSMP-489x series. It features a dual anode configuration housed in a SOT-323 package with three leads. The device has a peak inverse voltage of 100 V and a maximum series resistance of 2.5 Ω at a forward current of 5 mA. Total capacitance is specified as 0.33 pF maximum at 1 MHz and 0.375 pF typical at 500 MHz–3 GHz. Parasitic inductance is limited to 1.0 nH typical. Operating temperature ranges from -65 °C to +150 °C.

RF Diode Feature Summary

• Ultra-low parasitic inductance designed for frequencies significantly higher than conventional PIN diodes
• Dual anode configuration providing flexibility for specific circuit topologies
• Lead-free construction compliant with environmental standards

RF Diode Applications

• High frequency switching circuits operating between 500 MHz and 3 GHz
• Low inductance shunt mounted switches
• Microstrip series connection applications requiring minimal parasitic effects

RF Diode Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm the presence of the G0 marking code on the SOT-323 package to ensure correct identification. Check for RoHS compliance documentation if required by assembly specifications. Ensure storage conditions remain within the specified temperature range to maintain device integrity prior to soldering.

RF Diode Selection Notes

Select this component when ultra-low inductance is critical for high-frequency performance above 500 MHz. The dual anode configuration suits specific biasing requirements distinct from single or common cathode variants. Verify that the 100 V breakdown voltage meets the circuit's reverse voltage demands. Consider the SOT-323 footprint compatibility during PCB layout design to ensure proper thermal and electrical connections.

RF Diode Part Context

This part belongs to the HSMP-489x series, which focuses on low inductance characteristics for high-frequency applications. It differs from the HSMP-389x series primarily by its optimized inductance properties rather than just capacitance or resistance values. The series includes various configurations such as single, series, and common cathode, with the B suffix specifically denoting the dual anode variant.

RF Diode Replacement Considerations

Direct substitutes include other HSMP-489x series parts with matching dual anode configurations, such as HSMP-4890-BLKG. Cross-series replacements like HSMP-389B-BLKG may be considered if inductance constraints are less stringent. Verify package dimensions and pinout compatibility before substitution.