HSMP-489B-TR2G

RF Diode Overview

The HSMP-489B-TR2G is a surface mount RF PIN switch diode from Broadcom Limited, belonging to the HSMP-489x series. It features an ultra-low parasitic inductance design optimized for high-frequency applications ranging from 500 MHz to 3 GHz. The device utilizes a single diode configuration housed in a SOT-323 package with three leads. Key electrical specifications include a peak inverse voltage of 100 V, a maximum series resistance of 2.5 Ω at a forward current of 5 mA, and a total capacitance of 0.33 pF measured at 1 MHz. The component supports a junction temperature up to 150 °C and operates within a storage temperature range of -65 °C to +150 °C.

RF Diode Feature Summary

• Ultra-low parasitic inductance architecture designed for frequencies significantly higher than conventional PIN diodes
• Single diode configuration providing flexibility while saving board space and reducing cost
• Low capacitance and low resistance characteristics optimized for switching applications
• Lead-free construction with better thermal conductivity for higher power dissipation

RF Diode Applications

• High frequency transmit/receive switches operating between 500 MHz and 3 GHz
• Low inductance shunt mounted switches requiring minimal parasitic effects
• Series attenuator circuits in microstrip configurations
• High isolation SPDT switches utilizing dual bias techniques

RF Diode Procurement Notes

Verify the ordering suffix TR2G indicates tape and reel packaging containing 10,000 devices per 13-inch reel. Confirm compliance with Electronic Industries RS-481 standards for taping surface mounted components. Ensure the specific part number matches the required single diode configuration and SOT-323 package type before procurement.

RF Diode Selection Notes

Select this component when ultra-low parasitic inductance is critical for performance above 500 MHz. The single diode configuration suits simple series or shunt switching topologies. Verify that the 100 V peak inverse voltage rating meets the circuit requirements. Consider the SOT-323 footprint dimensions during PCB layout to ensure proper pad alignment and thermal management.

RF Diode Part Context

This component belongs to the HSMP-489x series, which distinguishes itself from the HSMP-389x series through its focus on ultra-low parasitic inductance. While the 389x series targets general switching with low capacitance, the 489x series is specifically engineered for much higher frequency operations. The HSMP-489B variant represents the single diode option within this low-inductance family.

RF Diode Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Designers should consult official replacement guides or contact the manufacturer directly for qualified alternatives.