Infineon Technologies BFP843H6327XTSA1

Overview

BFP843H6327XTSA1 from Infineon is a robust, pre-matched RF heterojunction bipolar transistor (HBT) optimized for low-noise amplification in 5.5 GHz broadband front-ends. It delivers NFmin = 1.2 dB at 5.5 GHz, Gma = 17 dB, and OIP3 = 19.5 dBm under 1.8 V/15 mA bias, with 20 dBm RF input power tolerance and 1.5 kV HBM ESD hardness.

For engineers reviewing the BFP843H6327XTSA1 datasheet, BFP843H6327XTSA1 pinout, BFP843H6327XTSA1 application, or BFP843H6327XTSA1 equivalent, this device supports high-frequency receiver chains requiring simultaneous low noise, high linearity, and industrial-grade ruggedness in compact SOT343 packaging.

Technical Context

The BFP843H6327XTSA1 is a silicon-germanium (SiGe) HBT fabricated on Infineon's high-frequency process, featuring integrated pre-matching for 50 Ω systems across 450 MHz–5.5 GHz. Its emitter-grounded configuration and dual-emitter layout (Pins 2 & 4) support balanced noise and gain optimization.

It operates with VCE = 1.8 V and IC = 8–15 mA, enabling stable low-voltage operation down to 1.2 V via external collector resistor adjustment. The device meets JEDEC JESD22-A114 HBM ESD requirements (±1.5 kV) and is qualified for industrial temperature range (−55 °C to +150 °C junction).

Key Specifications

Pinout & Package

Package: SOT343 (3.0 × 1.5 × 0.9 mm, 4-pin plastic leadless), surface-mount, lead-free and RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar RF low-noise amplifier applications.

Compared with NE85633 and QPL9057, the BFP843H6327XTSA1 uniquely balances broadband pre-match, industrial reliability, and mid-band noise-linearity trade-off - making it optimal for cost-sensitive, space-constrained GNSS/WiMAX front-ends requiring no redesign across frequency bands.

Availability

BFP843H6327XTSA1 is available at Aetrix Electronics and suitable for GPS/GLONASS receivers, WiMAX customer premises equipment, and SDARS satellite radio tuners requiring stable component supply across extended production lifecycles.

Supply support for BFP843H6327XTSA1 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, RF, and automotive ICs, with leadership in SiGe HBT technology for wireless infrastructure and consumer connectivity.

The BFP843 belongs to Infineon's BFP family of pre-matched RF transistors, designed specifically for high-volume, low-cost LNA applications in multi-standard wireless receivers where board space, test time, and reliability are critical.

FAQ

Can BFP843H6327XTSA1 operate at 1.2 V supply?

Yes - the device supports V_CC = 1.2 V with appropriate collector resistor selection to maintain I_C = 8–15 mA. At 1.2 V, NFmin increases by ≤0.3 dB and Gma drops ≤1.5 dB versus 1.8 V operation, verified per Table 12 and Figure 12 in the v2.0 datasheet. No derating is required for industrial temperature range.

Is SOT343 package compatible with standard reflow profiles?

Yes - the SOT343 package is qualified for IPC/JEDEC J-STD-020D moisture sensitivity level 1 (MSL-1) and supports peak reflow temperatures up to 260 °C for ≤30 seconds. Thermal resistance R_thJS = 405 K/W ensures safe junction temperature rise under 125 mW P_tot, confirmed in Table 3 and Figure 1.

Does BFP843H6327XTSA1 require external matching components?

No - the device is pre-matched for 50 Ω source and load impedances across 450 MHz–5.5 GHz, as validated in Tables 6–12. Only DC blocking capacitors and bias chokes are needed; no shunt/stub matching networks are required for nominal performance, reducing bill-of-materials and layout area by ~35% versus unmatched transistors.

What is the recommended PCB layout practice for dual-emitter pins?

Connect Pins 2 and 4 (both labeled E) directly to the same low-inductance ground plane using separate short traces (<1 mm) and dedicated vias. Avoid daisy-chaining; instead, use star grounding to minimize common-impedance coupling that degrades NFmin and OIP3, as specified in Section 4.2 of the datasheet layout guidelines.