ATF-331M4-TR2 Equivalent & Substitute Parts

Part Overview

The ATF-331M4-TR2 is an RF MOSFET pseudomorphic high electron mobility transistor (pHEMT FET) manufactured by Broadcom Limited, designed for RF amplification applications at 2 GHz. This component operates at 4 V with a gain of 15 dB and output power of 19 dBm in a MiniPak 1412 surface mount package.

The ATF-331M4-TR2 is classified as obsolete. Locating equivalent or substitute components is necessary for ongoing production support, design updates, and inventory replenishment where original stock is unavailable or depleted.

Substiute Parts

ATF-331M4-TR2

Broadcom LimitedIn Stock: 1142ATF-331M4-TR2 Datasheet

Current PartRFQ

SKY65050-372LF

Skyworks Solutions Inc.In Stock: 47606SKY65050-372LF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ATF-331M4-TR2 is determined by alignment of the following critical parameters:

Technology Class: Both the main part and substitute must be pHEMT FET devices to maintain equivalent RF performance characteristics and biasing requirements.

Frequency Band: The main part operates at 2 GHz. Substitute parts operating at adjacent or overlapping frequency bands (such as 2.4 GHz) are acceptable where the application bandwidth permits.

Voltage Compatibility: The main part is rated at 5.5 V maximum with a 4 V test condition. Substitute parts must support equivalent or higher voltage ratings to ensure safe operation within the same power supply architecture.

Gain and Noise Figure: The main part delivers 15 dB gain and 0.6 dB noise figure. Substitute parts with equal or superior gain and noise performance maintain signal integrity in RF amplification circuits.

Output Power: The main part produces 19 dBm output power. Substitute parts with comparable or higher output power capability ensure adequate signal levels for downstream stages.

Package Compatibility: The main part uses MiniPak 1412 (0505 metric). Substitute parts in different packages (such as SC-70-4) require PCB layout and assembly process modifications but are electrically compatible if other parameters align.

Compliance and Status: The main part is obsolete. Active substitute parts with current manufacturing status and equivalent compliance certifications (REACH, ECCN) are preferred for long-term supply assurance.

Parameter Comparison

Engineering Selection Recommendations

SKY65050-372LF Substitution Criteria:

The SKY65050-372LF from Skyworks Solutions Inc. is an active product with current manufacturing status, providing supply continuity where the ATF-331M4-TR2 is no longer available. Both devices are pHEMT FET technologies with REACH compliance and EAR99 export classification, ensuring regulatory alignment.

Frequency Consideration: The SKY65050-372LF operates at 2.4 GHz versus the ATF-331M4-TR2 at 2 GHz. This frequency offset is acceptable for applications with bandwidth tolerance spanning both bands. Circuit tuning adjustments may be required for narrowband designs.

Voltage and Current: The SKY65050-372LF operates at a lower test voltage (3 V versus 4 V) but maintains a higher rated voltage (6 V versus 5.5 V). Current ratings are lower (55 mA versus 305 mA), indicating reduced power dissipation. Applications requiring the full current capacity of the ATF-331M4-TR2 must evaluate whether the SKY65050-372LF current capability is sufficient.

Gain and Noise Performance: The SKY65050-372LF delivers superior gain (15.5 dB versus 15 dB) and lower noise figure (0.4 dB versus 0.6 dB), providing improved signal-to-noise ratio in RF amplification stages.

Output Power: The SKY65050-372LF produces lower output power (10.5 dBm versus 19 dBm). Applications requiring the full 19 dBm output level must confirm that 10.5 dBm meets system requirements or implement additional amplification stages.

Package Transition: The SKY65050-372LF uses SC-70-4 packaging versus MiniPak 1412. PCB layout, footprint, and assembly process changes are required. Both packages are surface mount with MSL 1 rating, ensuring equivalent moisture handling.

Compliance: Both parts carry identical REACH and ECCN classifications, supporting equivalent supply chain and export compliance requirements.

Frequently Asked Questions (FAQ)

Q: Can the SKY65050-372LF directly replace the ATF-331M4-TR2 without circuit modifications?

A: Direct pin-for-pin replacement is not possible due to different package types (MiniPak 1412 versus SC-70-4). PCB layout and footprint changes are required. Additionally, the lower output power (10.5 dBm versus 19 dBm) and reduced current rating (55 mA versus 305 mA) may require circuit tuning or stage reconfiguration depending on application requirements.

Q: What is the impact of the frequency difference (2 GHz versus 2.4 GHz)?

A: The 400 MHz frequency offset affects impedance matching networks and filter designs. Applications with bandwidth spanning both frequencies can accommodate this shift with tuning adjustments. Narrowband designs centered at 2 GHz may require significant circuit redesign.

Q: Is the lower output power of the SKY65050-372LF acceptable?

A: The SKY65050-372LF produces 10.5 dBm versus the ATF-331M4-TR2 at 19 dBm, an 8.5 dB reduction. System-level power budget analysis is required to determine if this level meets downstream requirements or if additional amplification stages are necessary.

Q: Are there compliance or supply chain differences between these parts?

A: Both parts carry identical REACH and ECCN classifications. The SKY65050-372LF is an active product with current manufacturing status, providing long-term supply assurance compared to the obsolete ATF-331M4-TR2.

Q: What are the thermal and current handling differences?

A: The SKY65050-372LF has a lower current rating (55 mA versus 305 mA), resulting in reduced power dissipation and thermal load. Applications requiring the full current capacity of the ATF-331M4-TR2 must verify that the SKY65050-372LF current capability is adequate for the intended circuit.

Q: Can the SKY65050-372LF be used in existing PCB designs without layout changes?

A: No. The different package types require new footprints and PCB layout modifications. Assembly process parameters may also differ between MiniPak 1412 and SC-70-4 packages.