NXP Semiconductors BFG67,215

Overview

BFG67,215 from NXP Semiconductors is an NPN silicon wideband RF transistor in SOT143B package, designed for GHz-range amplification with 8 GHz transition frequency (f_T), 17 dB maximum unilateral power gain at 1 GHz, and 1.3 dB noise figure at 1 GHz under optimal source impedance. It serves as a low-noise, high-gain active device in satellite TV tuner front-ends and portable RF communication receivers.

For engineers reviewing the BFG67,215 datasheet, BFG67,215 pinout, BFG67,215 application, or BFG67,215 equivalent, this part supports critical RF design decisions involving wideband LNA stages, impedance-matched 50 Ω signal paths, and high-frequency stability up to 2 GHz - with verified thermal resistance (R_{th j-s} = 290 K/W) and gold metallization for reliability.

Technical Context

The BFG67,215 operates as a common-emitter NPN RF transistor optimized for small-signal amplification in the 0.5–2 GHz band. Its dual-emitter SOT143B structure enables precise emitter degeneration and bias flexibility, while gold metallization ensures long-term interconnect integrity under thermal cycling.

It delivers stable gain performance across collector currents from 5 mA to 30 mA, with measured G_UM of 17 dB at 1 GHz (IC = 15 mA, V_CE = 8 V) and noise figure rising to 2.2 dB at 2 GHz - confirming its suitability for multi-band tuners requiring consistent low-noise behavior across adjacent channels.

Key Specifications

Pinout & Package

Package: SOT143B - 4-pin plastic surface-mount package with dual-emitter configuration and in-line emitter pinning (Pins 2 and 4 are emitters). Dimensions: 3.0 × 1.4 × 1.1 mm (L × W × H), lead pitch 1.9 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BFG67/X and MRF581, the BFG67,215 offers the optimal balance of GHz gain, low noise, and compact SOT143B packaging for space-constrained satellite and portable RF receivers - whereas BFG67/X demands layout changes and MRF581 lacks required f_T and noise performance.

Availability

BFG67,215 is available at Aetrix Electronics and suitable for satellite TV tuners, portable RF receivers, wireless video transmitters, and ISM-band signal boosters requiring stable component supply, traceable sourcing, and lifecycle continuity.

Supply support for BFG67,215 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

NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and consumer applications.

The BFG67 series belongs to NXP's legacy RF transistor product line, engineered specifically for high-frequency, low-noise amplification in broadcast and portable communications equipment - emphasizing reliability, GHz bandwidth, and ease of 50 Ω system integration.

FAQ

What is the maximum operating frequency supported by the BFG67,215?

The BFG67,215 has a transition frequency (f_T) of 8 GHz, with verified gain (G_UM) of 10 dB at 2 GHz and 17 dB at 1 GHz. Its usable small-signal amplification range extends reliably to 2 GHz in tuned 50 Ω circuits, making it appropriate for satellite TV (950–2150 MHz) and UHF ISM-band applications. Operation beyond 2 GHz requires careful layout de-embedding and stability analysis.

Does the BFG67,215 require external neutralization for stability?

No, the BFG67,215 does not require external neutralization in typical 1–2 GHz LNA designs due to its low feedback capacitance (C_re = 0.5 pF) and unconditional stability confirmed in manufacturer-provided S-parameter data. Stability circles show no unstable regions within 0.5–2 GHz when biased at IC = 15 mA, V_CE = 8 V - enabling robust single-stage amplifier implementations without added components.

What is the recommended bias condition for minimum noise figure in the BFG67,215?

For minimum noise figure, the BFG67,215 should be biased at IC = 5 mA and V_CE = 8 V, with source impedance matched to Γ_opt = 0.455∠33.8° (at 500 MHz) or Γ_opt = 0.375∠65.9° (at 1 GHz). These values are documented in the official NXP noise parameter tables and enable F_min = 1.3 dB at 1 GHz - critical for maximizing receiver sensitivity in satellite tuner front-ends.

Can the BFG67,215 be used in Class A amplifier configurations?

Yes, the BFG67,215 supports Class A operation with DC collector current up to 50 mA (absolute max) and total power dissipation of 300 mW at T_s ≤ 65 °C. For linear Class A amplification at 1 GHz, a typical bias point is IC = 15 mA, V_CE = 8 V - delivering 17 dB G_UM and 1.7 dB noise figure, balancing efficiency, linearity, and thermal safety on standard FR4 PCBs.

Is the BFG67,215 RoHS compliant and halogen-free?

Yes, the BFG67,215 is RoHS compliant and halogen-free per NXP's product change notification PCN-2006-001 and material declarations dated 2007. The SOT143B package uses lead-free matte tin plating and green molding compound, meeting EU Directive 2011/65/EU and JEDEC J-STD-709 requirements for hazardous substance restrictions.