HFA3128B96

Overview

The HFA3128B96 is an ultra-high frequency transistor array fabricated using Intersil’s complementary bipolar UHF-1 process. The device integrates five dielectrically isolated transistors on a common monolithic substrate, featuring NPN and PNP types with transition frequencies of 8 GHz and 5.5 GHz, respectively. It exhibits a noise figure of 3.5 dB at 1.0 GHz in a 50 Ω system. Key electrical parameters include an NPN current gain (hFE) of 130, an NPN Early voltage of 50 V, and a collector-to-collector leakage current of less than 1 pA. The package is a 14-pin SOIC.

Feature Summary

• Dielectric isolation between transistors ensures complete isolation within the array.
• Low noise performance suitable for high-frequency amplifier and mixer applications.
• Pin-compatible design aligns with industry standard 3XXX series arrays.

Applications

• VHF/UHF amplifiers
• VHF/UHF mixers
• IF converters
• Synchronous detectors

Procurement Notes

Verify RoHS compliance status as the suffix '96' indicates lead-free plus anneal availability. Confirm manufacturer origin, as production may be attributed to Renesas Electronics following corporate acquisitions. Ensure datasheet revision matches the specific manufacturing lot requirements for your application.

Selection Notes

Select this component when designing circuits requiring matched NPN and PNP pairs with low noise characteristics at VHF/UHF frequencies. Consider the 14-pin SOIC package constraints and thermal dissipation capabilities. Verify that the 8 GHz NPN transition frequency meets the specific signal processing bandwidth requirements of the target system.

Part Context

This part belongs to the HFA3046, HFA3096, HFA3127, and HFA3128 family of ultra-high frequency transistor arrays. These components share similar fabrication processes and functional architectures, differing primarily in specific transistor configurations or packaging options. They are designed for high-performance RF signal processing tasks.

Replacement Considerations

Direct pin-compatible replacements include other members of the 3XXX series arrays. Verify electrical parameter equivalence, particularly transition frequency and noise figure, before substituting with alternative manufacturers' offerings.

FAQ

What is the transition frequency of the NPN transistors in the HFA3128B96?

The NPN transistors exhibit a transition frequency (fT) of 8 GHz.

Does the HFA3128B96 offer isolation between its internal transistors?

Yes, the device features complete isolation between transistors due to its dielectrically isolated construction on a common monolithic substrate.

What is the typical noise figure of this component?

The noise figure is 3.5 dB at 1.0 GHz in a 50 Ω system.