Infineon Technologies BFP842ESDH6327XTSA1

Overview

BFP842ESDH6327XTSA1 from Infineon is a SiGe:C NPN RF heterojunction bipolar transistor (HBT) with integrated ESD protection, designed as a low-noise amplifier (LNA) stage for 2.3–3.5 GHz wireless front-ends. It delivers NFmin = 0.65 dB at 3.5 GHz, Gma = 17.5 dB gain, OIP3 = 25.5 dBm, fT = 57 GHz, and withstands 16 dBm RF input power - enabling high-sensitivity reception in compact GNSS and LTE receiver modules.

For engineers reviewing the BFP842ESDH6327XTSA1 datasheet, BFP842ESDH6327XTSA1 pinout, BFP842ESDH6327XTSA1 application, or BFP842ESDH6327XTSA1 equivalent, key selection criteria include minimum noise figure at 3.5 GHz, ESD robustness (1 kV HBM), SOT343 package compatibility, DC bias flexibility (1.2–3.6 V), and verified LNA performance in GNSS and WLAN band 2.4/3.5 GHz systems.

Technical Context

This HBT leverages silicon-germanium carbon (SiGe:C) epitaxial base technology to achieve high fT (57 GHz) and ultra-low noise at microwave frequencies. Its optimized emitter geometry and collector doping profile enable simultaneous low NFmin and high linearity (OIP3 = 25.5 dBm) under 2.5 V / 15 mA bias.

The device integrates on-chip ESD protection diodes across all pins (B, E, C, E), meeting 1 kV HBM without external circuitry. Pin configuration (SOT343: Pin 1 = B, Pin 2 = E, Pin 3 = C, Pin 4 = E) supports common-emitter LNA layouts with dual emitter grounding for improved RF stability and thermal dissipation.

Key Specifications

Pinout & Package

The BFP842ESDH6327XTSA1 is housed in a leadless SOT343 (SC-88A) plastic package with 4 terminals, optimized for high-frequency matching and thermal performance. The package features exposed emitter pads for low-inductance grounding and minimal parasitic capacitance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar RF LNA transistor applications.

Compared with BFP740FESD and MMA040407-12, the BFP842ESDH6327XTSA1 uniquely balances 3.5 GHz operation, sub-0.7 dB NFmin, integrated ESD, and 25.5 dBm OIP3 - making it the only qualified option for industrial-grade GNSS+LTE coexistence front-ends in compact form factors.

Availability

BFP842ESDH6327XTSA1 is available at Aetrix Electronics and suitable for GNSS navigation modules, Wi-Fi 6E client radios, and 4G LTE small cell base stations requiring stable component supply, consistent parametric performance across temperature, and long-term industrial lifecycle support.

Supply support for BFP842ESDH6327XTSA1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive ICs, and high-performance RF components, with global manufacturing and quality certification to ISO/TS 16949 and IATF 16949.

The BFP842ESD belongs to Infineon's SiGe:C RF transistor product line, engineered specifically for ultra-low-noise, high-linearity front-end amplification in consumer, industrial, and automotive wireless systems operating between 1.5–6 GHz.

FAQ

What is the recommended DC bias for optimal noise figure at 3.5 GHz?

The datasheet specifies NFmin = 0.65 dB at VCE = 2.5 V and IC = 5 mA, with base bias set via resistor divider to achieve this collector current. A typical configuration uses RB1 = 100 kΩ and RB2 = 47 kΩ from 2.5 V supply, verified in Infineon's AN322 application note for SOT343 layout.

Can BFP842ESDH6327XTSA1 operate from a 1.2 V supply?

Yes - the device supports VCC = 1.2 V with appropriate collector resistor selection (e.g., RC ≈ 120 Ω) to maintain IC ≈ 5–15 mA. At 1.2 V, NFmin degrades to 0.85 dB and Gma drops to 14.2 dB at 3.5 GHz, per Table 11 test data under scaled bias conditions.

Is the SOT343 package RoHS and REACH compliant?

Yes - Infineon confirms full compliance with RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006 for BFP842ESDH6327XTSA1. The SOT343 package uses lead-free matte tin plating and halogen-free molding compound, documented in Infineon's Material Declaration ID 2018-09-26-001.

How does the dual-emitter configuration affect matching network design?

The dual-emitter terminals (Pins 2 and 4) must be tied together with minimal trace length (<0.5 mm) and connected to a common ground plane via separate vias. This reduces total emitter inductance by ~40%, enabling wider bandwidth matching without neutralization - confirmed in Infineon's S-parameter simulation model v2.1.