NXP Semiconductors MRFG35010R1

Overview

MRFG35010R1 from Freescale Semiconductor is a gallium arsenide pseudomorphic high-electron-mobility transistor (GaAs PHEMT) RF power FET designed for WLL/MMDS and UMTS driver stages operating from 1800 to 3600 MHz. It delivers 10 W P1dB at 3550 MHz, 10 dB power gain, and 30% drain efficiency under Class AB conditions (VDD = 12 V, IDQ = 180 mA), targeting linear base station amplifier applications.

For engineers reviewing the MRFG35010R1 datasheet, MRFG35010R1 pinout, MRFG35010R1 application, or MRFG35010R1 equivalent, this device requires attention to its unmatched RF port impedances (e.g., Zsource = 4.1 − j15.8 Ω at 3550 MHz), thermal resistance of 4.8 °C/W in Class AB, gate-source cutoff voltage range (−1.2 to −0.7 V), and NI-360HF package mechanical constraints for heatsink mounting.

Technical Context

This GaAs PHEMT operates as a single-ended common-source RF power amplifier stage with fixed biasing architecture. Its design supports wideband linear amplification across 3.4–3.6 GHz using external input/output matching networks, as confirmed by measured S-parameters (e.g., |S21| = 1.268 ∠11.14° at 2.9 GHz, Class AB) and load-pull validated performance metrics.

The device employs an unpassivated die in a ceramic/metal NI-360HF package with flanged case for direct thermal coupling. It requires stable 12 V DC drain supply and negative gate bias (VGS(Q) = −1.0 to −0.5 V) to maintain 180 mA quiescent current, with channel temperature limited to ≤150 °C for reliability.

Key Specifications

Pinout & Package

The MRFG35010R1 is housed in the NI-360HF package (Case 360D-02, Style 1), a flanged ceramic/metal hermetic package with solderable lid and insulated base for direct-mount thermal management. Dimensions: 20.19–20.45 mm × 5.72–5.97 mm × 1.96–2.21 mm (L×W×H), with 3-terminal configuration.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar RF power FET applications.

Compared with MRFG35010R1, MRFG35010AR1 offers identical RF performance with enhanced process yield, while QPD1005 provides higher power at the cost of increased supply voltage, thermal complexity, and board redesign - making MRFG35010R1 optimal for cost-sensitive, 12 V-based 3.5 GHz driver applications.

Availability

MRFG35010R1 is available at Aetrix Electronics and suitable for UMTS base station drivers, WLL/MMDS transmitters, 3.5 GHz small cell power amplifiers, and linear microwave link amplifiers requiring stable component supply and legacy design continuity.

Supply support for MRFG35010R1 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

Freescale Semiconductor (now part of NXP Semiconductors) was a leading designer of RF power semiconductors for wireless infrastructure, emphasizing high-efficiency GaAs and later GaN solutions for cellular base stations.

The MRFG35010R1 belongs to Freescale's MRFG-series GaAs PHEMT portfolio, engineered specifically for high-linearity, high-efficiency driver-stage amplification in 3G and fixed wireless systems operating between 1.8–3.6 GHz.

FAQ

What is the recommended gate bias voltage for MRFG35010R1 in Class AB operation?

The MRFG35010R1 requires a quiescent gate voltage (VGS(Q)) of −1.0 to −0.5 V at IDQ = 180 mA and VDD = 12 V. This range ensures stable Class AB conduction while avoiding excessive gate leakage; actual value depends on unit-to-unit VGS(th) variation (−1.2 to −0.7 V) and thermal drift. A trimmable bias network, as shown in Figure 1 of the MRFG35010R1 datasheet, is recommended for production calibration.

Can MRFG35010R1 be used in Class A mode, and what are the key trade-offs?

Yes, MRFG35010R1 supports Class A operation with IDQ = 1000 mA, yielding higher linearity and lower noise but reduced efficiency (23% vs. 30% in Class AB) and higher thermal dissipation (RθJC = 5.3 °C/W). The device's 28.3 W total dissipation rating permits this, but heatsink requirements increase significantly - requiring ≥7.5 °C/W thermal resistance to maintain TC ≤ 90 °C.

What are the exact NI-360HF package dimensions and mounting requirements for MRFG35010R1?

The MRFG35010R1 uses the NI-360HF package (Case 360D-02, Style 1): 20.19–20.45 mm length, 5.72–5.97 mm width, 1.96–2.21 mm height, with a 9.02–9.27 mm × 9.96–10.16 mm flange footprint. Mounting requires conductive thermal interface material and mechanical clamping or solder attachment to a copper-alloy heatsink; the flange is electrically isolated from internal terminals per package drawing.

Is MRFG35010R1 RoHS compliant, and what does the 'R1' suffix indicate?

Yes, MRFG35010R1 is RoHS compliant per EU Directive 2011/65/EU, with lead-free terminations and halogen-free molding compound. The 'R1' suffix denotes tape-and-reel packaging: 500 devices per 32 mm carrier tape on a 13-inch reel, optimized for high-speed SMT placement in telecom PA module manufacturing.

How does the MRFG35010R1 replacement notice affect existing designs?

Freescale explicitly states "MRFG35010R1 replaced by MRFG35010AR1" - the AR1 variant is a direct, pin- and electrically compatible replacement with identical specifications and NI-360HF packaging. No PCB or circuit changes are required; MRFG35010AR1 improves process consistency and long-term supply assurance while maintaining full functional equivalence with MRFG35010R1.