TRF3701IRHC Equivalent & Substitute Parts

Part Overview

The TRF3701IRHC is an RF Modulator IC manufactured by Texas Instruments, designed for applications requiring modulation across the 140MHz to 1.5GHz frequency range. This device operates with a supply voltage of 4.5V to 5.5V and delivers an output power of -1dBm with a noise floor of -156dBm/Hz. The component is classified as Obsolete, making identification of suitable substitute parts essential for ongoing system support and new design implementations.

Substiute Parts

TRF3701IRHC

Texas InstrumentsIn Stock: 1332TRF3701IRHC Datasheet

Current PartRFQ

TRF370333IRGER

Texas InstrumentsIn Stock: 16122TRF370333IRGER Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TRF3701IRHC is determined by the following critical parameters:

Functional Compatibility: Both the main part and substitute must serve the modulator function with compatible supply voltage ranges (4.5V ~ 5.5V).

Frequency Coverage: The substitute part must support the required LO and RF frequency bands. The TRF3701IRHC operates within 140MHz to 1.5GHz; substitute parts may extend this range while maintaining backward compatibility within the original specification window.

Electrical Performance: Output power, P1dB, and noise floor characteristics must meet or exceed the original part's performance envelope to ensure system-level functionality.

Package and Mounting: Surface mount compatibility and pin count considerations are secondary factors; however, package differences may require PCB layout modifications.

Compliance and Status: Active product status and maintained RoHS3 compliance ensure long-term availability and regulatory alignment.

The identified substitute part TRF370333IRGER meets these criteria through extended frequency coverage, improved electrical performance, and active product status, while maintaining supply voltage compatibility and RoHS3 compliance.

Parameter Comparison

Engineering Selection Recommendations

The TRF370333IRGER is the manufacturer-recommended substitute for the obsolete TRF3701IRHC. Both devices maintain identical supply voltage specifications (4.5V ~ 5.5V) and RoHS3 compliance status, ensuring regulatory continuity.

The substitute part offers extended frequency coverage (400MHz ~ 4GHz versus 140MHz ~ 1.5GHz), improved P1dB performance (9.5dBm versus 6.5dBm), and superior noise floor characteristics (-163dBm/Hz versus -156dBm/Hz). These enhancements provide performance headroom for demanding applications.

The primary design consideration is the package transition from 16-pin to 24-pin VFQFN, which requires PCB layout modification. Additionally, the increased supply current (235mA versus 145mA) necessitates power supply capacity verification.

For applications operating exclusively within the 140MHz to 1.5GHz band, the TRF370333IRGER remains fully compatible and backward-compatible, as its frequency range encompasses the original specification window.

Frequently Asked Questions (FAQ)

Q: Can the TRF370333IRGER directly replace the TRF3701IRHC without PCB modifications?

A: No. The TRF370333IRGER uses a 24-pin VFQFN package compared to the 16-pin VQFN of the original part. PCB layout redesign is required to accommodate the different pin configuration and package footprint.

Q: What is the impact of the increased supply current on system design?

A: The substitute part draws 235mA versus 145mA for the original part, representing a 90mA increase. Power supply capacity and thermal management must be re-evaluated to accommodate this higher current draw.

Q: Is the TRF370333IRGER suitable for applications operating below 400MHz?

A: The TRF370333IRGER is specified for operation from 400MHz to 4GHz. Applications requiring operation below 400MHz fall outside the substitute part's specified frequency range and require alternative solutions.

Q: Are both parts RoHS3 compliant?

A: Yes. Both the TRF3701IRHC and TRF370333IRGER are ROHS3 compliant with MSL rating 2 (1 Year), ensuring regulatory alignment for new designs and legacy system support.

Q: Why is the TRF3701IRHC classified as Obsolete?

A: The TRF3701IRHC has reached end-of-life status. The TRF370333IRGER is the active product offering from Texas Instruments for RF modulation applications, providing extended capabilities and long-term availability.