TRF1122IRTMT Equivalent & Substitute Parts

Part Overview

The TRF1122IRTMT is an RF Mixer IC designed for MDS, MMDS, and WCS applications operating at 2.5GHz as an up converter. Manufactured by Texas Instruments in a 32-VQFN (5x5) surface mount package, this component delivers 20dB gain with a supply voltage range of 4.75V to 5.25V and 50mA supply current. The product is currently obsolete, making identification of functionally equivalent alternatives essential for system redesign, legacy product support, and continued production requirements.

Substiute Parts

TRF1122IRTMT

Texas InstrumentsIn Stock: 1775TRF1122IRTMT Datasheet

Current PartRFQ

TRF3705IRGER

Texas InstrumentsIn Stock: 29699TRF3705IRGER Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TRF1122IRTMT is determined by the following critical parameters:

• Functional equivalence: RF mixer or modulator capability within the 2.5GHz operating band
• Frequency range compatibility: Operating frequency must encompass or closely align with 2.5GHz
• Gain characteristics: Comparable gain performance (20dB reference)
• Supply voltage compatibility: Operating voltage range must support 4.75V to 5.25V or be adaptable through voltage regulation
• Package form factor: Surface mount technology with pin-compatible or functionally equivalent pinout
• Regulatory compliance: ROHS3 compliance and EAR99 classification maintained
• Moisture sensitivity: MSL rating acceptable for standard handling and storage

The TRF3705IRGER qualifies as a substitute based on its RF modulation capability across the 300MHz to 4GHz frequency range, which encompasses the 2.5GHz operating point of the original part, combined with compatible surface mount packaging, ROHS3 compliance, and EAR99 classification.

Parameter Comparison

Engineering Selection Recommendations

Selection of the TRF3705IRGER as a substitute for the obsolete TRF1122IRTMT is supported by the following engineering criteria:

Product Status: The TRF3705IRGER maintains active production status with Texas Instruments, ensuring long-term availability and supply chain continuity compared to the obsolete TRF1122IRTMT.

Regulatory Compliance: Both components maintain ROHS3 compliance and EAR99 classification, satisfying environmental and export control requirements without modification to system certifications.

Frequency Coverage: The TRF3705IRGER operates across 300MHz to 4GHz, providing full coverage of the 2.5GHz operating point required by the original application.

Moisture Sensitivity: The TRF3705IRGER carries an MSL rating of 2 (1 Year), which is superior to the TRF1122IRTMT MSL rating of 3 (168 Hours), reducing moisture-related handling constraints during manufacturing and storage.

Design Integration Considerations: Substitution requires evaluation of supply voltage compatibility (3.15V to 3.6V versus 4.75V to 5.25V), supply current requirements (306mA versus 50mA), and package footprint differences (24-VQFN 4x4 versus 32-VQFN 5x5). PCB layout and power delivery architecture modifications may be necessary.

Frequently Asked Questions (FAQ)

Q: Can the TRF3705IRGER directly replace the TRF1122IRTMT without PCB modifications?

A: Direct pin-for-pin replacement is not possible due to package differences (24-VQFN 4x4 versus 32-VQFN 5x5) and different pinout configurations. PCB layout redesign is required. Additionally, supply voltage and current requirements differ, necessitating power delivery circuit modifications.

Q: What are the primary electrical differences between these components?

A: The TRF1122IRTMT operates at 4.75V to 5.25V with 50mA supply current and delivers 20dB gain as an up converter. The TRF3705IRGER operates at 3.15V to 3.6V with 306mA supply current and provides 7.1dBm output power as a modulator. Functional topology and performance characteristics differ significantly.

Q: Are both components compliant with current environmental regulations?

A: Yes. Both the TRF1122IRTMT and TRF3705IRGER are ROHS3 compliant, REACH unaffected, and classified as EAR99 for export control purposes.

Q: What is the significance of the MSL rating difference?

A: The TRF3705IRGER MSL rating of 2 (1 Year) indicates superior moisture resistance compared to the TRF1122IRTMT MSL rating of 3 (168 Hours). This reduces the risk of moisture-induced failures during manufacturing, storage, and field deployment, particularly in humid environments.

Q: Is the TRF3705IRGER the only available substitute?

A: Based on the provided substitute list, the TRF3705IRGER is the documented equivalent for the TRF1122IRTMT. Additional alternatives may exist within the Texas Instruments RF component portfolio, but substitution decisions should be validated against specific application requirements.