HFA3128BZ

Overview

The HFA3128BZ is an ultra-high frequency transistor array manufactured by Renesas Electronics Corporation. It consists of five dielectrically isolated PNP bipolar transistors on a common monolithic substrate, fabricated using the complementary bipolar UHF-1 process. The device operates at a transition frequency (fT) of 5.5 GHz with a typical noise figure of 3.5 dB. Key electrical parameters include a maximum collector-emitter voltage (VCEO) of 8 V, a maximum emitter-base voltage (VEBO) of 5.5 V, and a continuous collector current of 65 mA. The power dissipation is rated at 150 mW, and it functions within a temperature range of -55°C to +125°C. It is housed in a 16-lead QFN EP package.

Feature Summary

• Monolithic construction provides close electrical and thermal matching among the five integrated transistors.
• Dielectric isolation ensures independent operation of individual transistors within the array.
• Full terminal access allows for maximum application flexibility in circuit design.

Applications

• VHF/UHF Amplifiers
• VHF/UHF Mixers
• IF Converters
• Synchronous Detectors

Procurement Notes

Verify component authenticity through authorized channels due to end-of-life status. Confirm RoHS compliance details as specified in official documentation. Check moisture sensitivity level requirements before handling. Validate package dimensions against PCB footprint specifications. Ensure supply chain stability given discontinued manufacturing status.

Selection Notes

Select this component for designs requiring matched PNP arrays at 5.5 GHz. Compare against NPN variants like HFA3127 if polarity differs. Consider thermal management for 150 mW dissipation in compact QFN packages. Verify compatibility with existing RF layouts. Evaluate alternative packages if lead-free constraints apply.

Part Context

The HFA3128 series belongs to Renesas' family of ultra-high frequency transistor arrays, including HFA3046, HFA3096, and HFA3127. These devices utilize the same UHF-1 process technology. The HFA3128 specifically features all PNP transistors, contrasting with the NPN-only HFA3127 or the mixed NPN-PNP HFA3096. This family is designed for high-frequency analog applications requiring precise matching.

Replacement Considerations

Public confirmed substitute part numbers are not available. The HFA3128BZ is listed as obsolete. Designers should consult manufacturer recommendations for next-generation replacements or evaluate equivalent arrays from other vendors if pin-compatible alternatives exist.