MGA-545P8-TR2 Equivalent & Substitute Parts

Part Overview

The MGA-545P8-TR2 is an RF amplifier IC designed for WLL and WLAN applications, operating across the 50MHz to 7GHz frequency range in an 8-LPCC surface mount package. This part is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity. Substitute parts must maintain compatibility with the original electrical specifications, physical footprint, and supply voltage requirements while accommodating minor performance variations within acceptable engineering tolerances.

Key Parameters

Parameter	Value	Unit
Frequency Range	50MHz ~ 7GHz	MHz/GHz
P1dB (Output Power at 1dB Compression)	21.3	dBm
Gain	11.5	dB
Noise Figure	2.9	dB
Supply Voltage	3.3	V
Supply Current	135	mA
Package Type	8-WFDFN Exposed Pad	—
Mounting Type	Surface Mount	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the MGA-545P8-TR2 is determined by the following critical parameters:

Electrical Compatibility: Supply voltage must be 3.3V to ensure direct integration into existing power distribution networks. Frequency range overlap is required; the substitute must cover the operational bands of the original design.

Physical Compatibility: Package type must be 8-WFDFN Exposed Pad with surface mount capability to maintain PCB layout compatibility and reflow soldering processes.

Performance Envelope: While P1dB, gain, and noise figure may vary, substitutes must operate within the same general performance class to preserve circuit function. Supply current variations are acceptable provided they remain within typical design margins.

Compliance & Status: Active product status is preferred for long-term availability, though compliance certifications (RoHS, REACH) ensure regulatory alignment with current manufacturing standards.

Parameter Comparison

Parameter	MGA-545P8-TR2 (Broadcom)	TRF37C73IDSGT (Texas Instruments)	Notes
Frequency Range	50MHz ~ 7GHz	1MHz ~ 6GHz	Substitute covers lower frequency limit; upper limit reduced by 1GHz
P1dB	21.3 dBm	16.5 dBm	4.8 dB reduction in output power
Gain	11.5 dB	17 dB	5.5 dB increase in gain
Noise Figure	2.9 dB	4.6 dB	0.6 dB increase in noise figure
Supply Voltage	3.3V	3.3V	Direct compatibility
Supply Current	135 mA	55 mA	Significant reduction in power consumption
Package Type	8-WFDFN Exposed Pad	8-WFDFN Exposed Pad	Identical package footprint
Mounting Type	Surface Mount	Surface Mount	Compatible assembly process
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	Identical handling requirements
Product Status	Obsolete	Active	Substitute ensures long-term availability

Engineering Selection Recommendations

The TRF37C73IDSGT from Texas Instruments is the manufacturer-recommended substitute for the obsolete MGA-545P8-TR2. Both devices share identical package geometry (8-WFDFN Exposed Pad), supply voltage (3.3V), and moisture sensitivity classification, enabling direct PCB layout reuse without redesign.

Compliance Status: The TRF37C73IDSGT carries Active product status with RoHS3 compliance and REACH Unaffected designation, ensuring regulatory alignment with current manufacturing and environmental standards. The original MGA-545P8-TR2 is REACH Unaffected with no RoHS classification specified.

Performance Trade-offs: The substitute exhibits higher gain (17 dB vs. 11.5 dB) and lower supply current (55 mA vs. 135 mA), reducing thermal load and power consumption. However, P1dB is reduced by 4.8 dB (16.5 dBm vs. 21.3 dBm), and the frequency upper limit decreases from 7GHz to 6GHz. Noise figure increases marginally by 0.6 dB. These variations require circuit-level evaluation to confirm suitability for the target application.

Availability: The substitute part is currently in stock with 1401 units available, providing immediate procurement capability compared to the obsolete original.

Frequently Asked Questions (FAQ)

Q: Can the TRF37C73IDSGT be used as a direct drop-in replacement for the MGA-545P8-TR2?

A: Physical and electrical compatibility is confirmed for the 3.3V supply and 8-WFDFN package. However, performance differences in P1dB, gain, noise figure, and frequency range require application-specific validation. Circuit simulation or bench testing is necessary to confirm functional equivalence in your specific design.

Q: What is the primary reason for substitution?

A: The MGA-545P8-TR2 is classified as obsolete. The TRF37C73IDSGT is an active product with confirmed long-term availability, ensuring production continuity and supply chain stability.

Q: How do the frequency ranges differ?

A: The MGA-545P8-TR2 operates from 50MHz to 7GHz, while the TRF37C73IDSGT operates from 1MHz to 6GHz. If your application requires operation above 6GHz, the substitute may not be suitable. Conversely, if your design operates below 50MHz, the substitute provides extended lower-frequency capability.

Q: What is the impact of the 4.8 dB P1dB reduction?

A: Lower P1dB indicates reduced output power capability before compression. In high-power applications, this may require circuit redesign or selection of an alternative amplifier stage. In low-power or small-signal applications, this difference may be negligible.

Q: Are there any handling or storage differences?

A: Both parts share identical Moisture Sensitivity Level 1 (Unlimited) classification, requiring no special storage or handling modifications during transition.

Q: What compliance certifications apply to the substitute?

A: The TRF37C73IDSGT is RoHS3 Compliant and REACH Unaffected, meeting current environmental and regulatory requirements for commercial and industrial applications.

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