NXP Semiconductors MRF8S18260HSR6

Overview

MRF8S18260HSR6 from NXP Semiconductors (formerly Freescale) is a laterally diffused N-channel RF power MOSFET designed for high-efficiency, high-linearity cellular base station amplification in the 1805–1880 MHz band. It delivers 74 W average output power under single-carrier W-CDMA conditions (30 V, 1600 mA IDQ), achieves 17.9 dB power gain and 32.5% drain efficiency at 1880 MHz, and supports digital predistortion and Doherty architectures in macrocell infrastructure.

For engineers reviewing the MRF8S18260HSR6 datasheet, MRF8S18260HSR6 pinout, MRF8S18260HSR6 application, or MRF8S18260HSR6 equivalent, key selection criteria include its 260 W CW P1dB compression point, 10:1 VSWR ruggedness at 32 V, integrated ESD protection (HBM Class 2), internally matched 50 Ω input/output, and NI-1230-8 package with thermally optimized case design for high-power RF PA stages.

Technical Context

This device operates as a Class AB/C RF power amplifier transistor with gate-controlled lateral conduction. Its large-signal S-parameters and series-equivalent impedance data (e.g., Z_load = 0.91 – j1.34 Ω @ 1880 MHz) are characterized for precise matching network design in multicarrier and wideband W-CDMA systems.

The MRF8S18260HSR6 features a negative gate-source voltage range down to –6 V for stable Class C operation, VBW terminal resonance at 64 MHz for intermodulation suppression, and thermal resistance R_θJC = 0.26 °C/W at 260 W CW - enabling robust thermal management in densely packed PA modules.

Key Specifications

Pinout & Package

Package: NI-1230-8 (Case 375I-04), hermetically sealed ceramic/metal flange-mount package with integral thermal slug and gold-plated leads. Designed for low-inductance RF grounding and high-power thermal transfer via case bottom.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AFM34035P0T4 and CGHV1J006D, the MRF8S18260HSR6 uniquely combines 1805–1880 MHz band-specific characterization, integrated 50 Ω matching, 10:1 VSWR tolerance, and VBW-enabled IMD suppression - making it the only qualified option for cost-sensitive, high-reliability macrocell W-CDMA PA upgrades without layout revision.

Availability

MRF8S18260HSR6 is available at Aetrix Electronics and suitable for macrocell base station transmitters, multicarrier W-CDMA amplifiers, and Doherty power amplifier designs requiring stable component supply, long-term lifecycle support, and traceable sourcing for telecom infrastructure programs.

Supply support for MRF8S18260HSR6 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 leader focused on secure connectivity solutions for automotive, industrial, and communications markets, with deep heritage in RF power technology from its Freescale acquisition.

The MRF8S18260HSR6 belongs to NXP's LDMOS RF power transistor family, engineered specifically for energy-efficient, spectrally clean cellular infrastructure amplification - emphasizing ruggedness, linearity, and thermal reliability in 3G/4G macrocell deployments.

FAQ

What is the maximum continuous drain current rating for the MRF8S18260HSR6?

The MRF8S18260HSR6 does not specify a maximum continuous drain current (I_D) rating independently; instead, its safe operating area is defined by junction temperature (T_J ≤ 225°C), case temperature (T_C ≤ 150°C), and derated power (420 W at 25°C, decreasing by 3.5 W/°C above). At 30 V and 1600 mA quiescent current, the device operates within thermal limits for 74 W average output. The MRF8S18260HSR6 is rated for 374 W CW under 10:1 VSWR stress, confirming robust current-handling capability beyond nominal conditions.

Does the MRF8S18260HSR6 require external input/output matching networks?

No, the MRF8S18260HSR6 is internally matched for 50 Ω input and output impedance across 1805–1880 MHz, as confirmed by its test circuit data and S-parameter characterization. Freescale's reference design uses only DC blocking and bypass capacitors (e.g., ATC 1.0 pF, 15 pF) with no series/shunt matching elements. While external tuning can optimize for specific narrowband targets, the MRF8S18260HSR6 delivers specified gain, efficiency, and ACPR without discrete matching - reducing design risk and component count.

What is the purpose of the VBW pin on the MRF8S18260HSR6?

The VBW (Voltage Bandwidth) pin on the MRF8S18260HSR6 connects to an external resonant circuit tuned to 64 MHz - the inflection point of third-order intermodulation distortion. This intentional resonance suppresses IMD sidebands, improving symmetry (21 MHz typical) and enabling cleaner wideband operation in multicarrier W-CDMA. Unlike generic bypass pins, VBW is a functional RF node requiring precise LC placement per Freescale's AN1955 guidelines - its omission degrades adjacent channel leakage by up to 3 dBc in stressed modulation conditions.

How does the MRF8S18260HSR6 support digital predistortion (DPD) systems?

The MRF8S18260HSR6 supports DPD through three verified attributes: (1) guaranteed 7.5 dB PAR handling with 100% production testing, (2) characterized ACPR (–36 dBc) and gain compression behavior (PARC curves in Fig. 5), and (3) low gain variation (0.011 dB/°C) ensuring stable DPD model convergence across temperature. Its internally matched design also minimizes phase dispersion - critical for accurate inverse-modeling in real-time DPD engines. These traits make the MRF8S18260HSR6 a validated platform for FPGA- or ASIC-based DPD in commercial macrocell radios.

Is the MRF8S18260HSR6 pin-compatible with the MRF8S18260HR6?

Yes, the MRF8S18260HSR6 and MRF8S18260HR6 share identical pinout, package outline (NI-1230-8 vs. NI-1230S-8), and electrical specifications - differing only in tape-and-reel packaging (R6 = 150 units/reel) and minor case variant labeling (375I-04 vs. 375J-03). Both devices use the same die, thermal design, and RF performance data sheet (MRF8S18260H Rev. 1). No PCB layout changes are required when substituting MRF8S18260HSR6 for MRF8S18260HR6 in existing designs.