HMC481ST89E

Overview

The HMC481ST89E is a single-channel RF gain block amplifier manufactured by Analog Devices Inc. utilizing SiGe or InGaP HBT technology. It operates within a frequency range of DC to 5 GHz and is housed in a surface-mount SOT-89 package. The device requires an operating supply voltage of 8V with a maximum limit of 12V, drawing a typical supply current of 79mA. Key electrical specifications include a power dissipation rating of 632mW, ensuring stable performance across the designated bandwidth for high-frequency applications.

Feature Summary

• Utilizes SiGe or InGaP Heterojunction Bipolar Transistor technology for robust signal amplification
• Designed as a general-purpose gain block suitable for LO or PA driver roles
• Surface-mount construction in a compact SOT-89 package for efficient PCB integration

Applications

• Cellular, PCS, and 3G communication systems
• Fixed wireless and WLAN infrastructure
• CATV, cable modem, and DBS equipment

Procurement Notes

Verify component authenticity through authorized channels due to obsolete lifecycle status. Confirm specific manufacturing lot details and datasheet revisions prior to integration. Ensure storage conditions comply with moisture sensitivity levels. Cross-reference pinout configurations against final design schematics to prevent interface mismatches during assembly processes.

Selection Notes

Select this component for wideband RF applications requiring DC-to-5GHz coverage. Consider the 8V supply requirement and 79mA current draw for power budget calculations. Evaluate thermal management needs given the 632mW power dissipation in the SOT-89 footprint. Assess compatibility with SiGe or InGaP process variations if specified by the design requirements.

Part Context

This part belongs to the HMC481 series of gain block amplifiers from Analog Devices. It serves as a versatile active component for mid-stage amplification in RF chains. The SOT-89 form factor allows for space-constrained designs while maintaining necessary gain characteristics for wireless transmission and reception modules.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Due to the obsolete lifecycle status, direct replacements may require functional equivalence analysis with other wideband SiGe/InGaP gain blocks from Analog Devices or alternative manufacturers.