NXP Semiconductors MRF19090SR3

Overview

MRF19090SR3 from NXP Semiconductors (formerly Freescale) is a lateral N-channel enhancement-mode RF power MOSFET designed for Class AB base station amplifiers operating at 1930–1990 MHz. It delivers 90 W PEP output power at 26 Vdc with 11.5 dB typical two-tone power gain and 35% drain efficiency, targeting CDMA/PCS multicarrier transmitter stages in macrocell infrastructure.

For engineers reviewing the MRF19090SR3 datasheet, MRF19090SR3 pinout, MRF19090SR3 application, or MRF19090SR3 equivalent, key selection criteria include its 1930–1990 MHz frequency coverage, 90 W PEP capability, internal input/output matching, 10:1 VSWR ruggedness, and RoHS-compliant NI-880S package with drain-gate-source terminal configuration.

Technical Context

This device operates as a common-source RF power amplifier stage with internally matched 50 Ω input and output impedance networks optimized for 1930–1990 MHz. Its lateral MOSFET structure enables high thermal stability (T_J = 200°C max) and robust 10:1 VSWR tolerance at full 90 W CW output.

It features gate threshold voltage of 2.0–4.0 Vdc, forward transconductance of 7.2 S typical, and low reverse transfer capacitance (C_rss = 4.2 pF), supporting stable high-efficiency operation under wideband multicarrier signals including IS-95 CDMA with pilot, sync, paging, and traffic codes 8–13.

Key Specifications

Pinout & Package

Package: NI-880S (Case 465C-02, Style 1), hermetically sealed ceramic/metal flange-mount package with solderable baseplate for direct thermal mounting. Dimensions: 23.0 mm × 13.7 mm × 5.1 mm (A × B × K max).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MRF19090SR3, MRF19090R3 offers identical RF performance in a physically larger package better suited for high-thermal-mass macrocell deployments, while MRFE6VP61K25H provides wider bandwidth and higher power but demands full circuit redesign and lacks internal matching.

Availability

MRF19090SR3 is available at Aetrix Electronics and suitable for CDMA base station transmitters, PCS multicarrier amplifiers, GSM combiner modules, and TDMA repeater output stages requiring stable component supply across extended product lifecycles.

Supply support for MRF19090SR3 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 acquired Freescale in 2015 and maintains legacy RF power transistor portfolios for telecom infrastructure. The company specializes in high-reliability analog and RF solutions for mission-critical communications.

The MRF19090SR3 belongs to Freescale's legacy RF Power Field Effect Transistor family, engineered specifically for Class AB operation in 1900–2000 MHz base station power amplifiers with emphasis on ruggedness, linearity, and thermal stability.

FAQ

What is the maximum operating junction temperature for the MRF19090SR3?

The MRF19090SR3 has a maximum operating junction temperature (T_J) of 200°C, as specified in Table 1 of the Freescale MRF19090 datasheet Rev. 6. This rating enables reliable operation in high-ambient environments typical of outdoor base station cabinets, provided thermal design maintains case temperature ≤150°C and accounts for R_θJC = 0.65 °C/W.

Does the MRF19090SR3 require external matching networks for 50 Ω systems?

No, the MRF19090SR3 is internally matched for 50 Ω input and output impedance across 1930–1990 MHz, eliminating the need for external broadband matching components in standard base station PA designs. However, the datasheet provides series-equivalent Z_source and Z_load values (e.g., 4.3 – j6.1 Ω at 1960 MHz) for custom matching if non-50 Ω system integration is required.

What is the gate threshold voltage range for the MRF19090SR3?

The MRF19090SR3 has a gate threshold voltage (V_GS(th)) range of 2.0 Vdc to 4.0 Vdc, measured at V_DS = 10 Vdc and I_D = 300 μAdc. This parameter defines the minimum gate voltage needed to initiate conduction and is critical for setting stable Class AB quiescent current (I_DQ = 750 mA) using the specified V_GS(Q) range of 2.5–4.5 Vdc.

Can the MRF19090SR3 withstand antenna VSWR mismatches?

Yes, the MRF19090SR3 is characterized to handle 10:1 VSWR continuously at 26 Vdc and 1960 MHz with 90 W CW output power, as stated in the "Features" section of the datasheet. This ruggedness eliminates the need for external VSWR protection circuits in base station final amplifier stages where antenna faults or environmental detuning may occur.

What is the RoHS compliance status of the MRF19090SR3?

The MRF19090SR3 is RoHS compliant, as explicitly stated in the "Features" section of the Freescale MRF19090 datasheet Rev. 6. Its NI-880S package uses lead-free terminations and complies with Directive 2011/65/EU, making it suitable for telecom infrastructure products sold in EU and other regulated markets requiring RoHS certification.