LM3291TME/NOPB Equivalent & Substitute Parts

Part Overview

The LM3291TME/NOPB is an RF Modulator IC manufactured by Texas Instruments in a 12-WFBGA/DSBGA package. This component is classified as Not For New Designs, indicating it has reached end-of-life status. For applications requiring RF modulation functionality, equivalent substitute parts must be evaluated based on functional compatibility, electrical performance, and packaging constraints.

Substiute Parts

LM3291TME/NOPB

Texas InstrumentsIn Stock: 1531LM3291TME/NOPB Datasheet

Current PartRFQ

LT5568-2EUF#TRPBF

Analog Devices Inc.In Stock: 2851LT5568-2EUF#TRPBF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LM3291TME/NOPB is based on the following criteria:

Functional Compatibility: Both the main part and substitute must perform RF modulation functionality.

Regulatory Compliance: Substitute parts must maintain ROHS3 compliance, REACH unaffected status, and EAR99 export classification to ensure regulatory continuity.

Packaging & Mounting: Surface mount technology is required. Package footprint compatibility must be verified during design integration.

Product Status: Active product status is preferred for new designs to ensure long-term availability and supply chain stability.

The LT5568-2EUF#TRPBF from Analog Devices Inc. qualifies as a functional substitute based on shared modulator functionality, active product status, and equivalent regulatory compliance.

Parameter Comparison

Engineering Selection Recommendations

For New Designs: The LT5568-2EUF#TRPBF is the appropriate selection. It maintains active product status, ensuring availability and manufacturer support. Both components share identical RoHS3, REACH, and export classification compliance, eliminating regulatory risk during substitution.

For Legacy System Maintenance: If the LM3291TME/NOPB must remain in production, verify available inventory and establish long-term supply agreements with authorized distributors. The Not For New Designs status indicates limited future availability.

Package Transition Consideration: The LT5568-2EUF#TRPBF uses a 16-WQFN package versus the 12-WFBGA/DSBGA of the original part. PCB layout and footprint redesign is required for this substitution.

Frequently Asked Questions (FAQ)

Q: Can the LT5568-2EUF#TRPBF directly replace the LM3291TME/NOPB without PCB modifications?

A: No. The LT5568-2EUF#TRPBF uses a 16-WQFN Exposed Pad package (4x4mm) while the LM3291TME/NOPB uses a 12-DSBGA package (1.64x1.24mm). PCB footprint redesign and layout modifications are required.

Q: Are there compliance risks when substituting these parts?

A: No. Both components maintain identical RoHS3 compliance, REACH unaffected status, and EAR99 export classification. Regulatory documentation remains consistent across the substitution.

Q: Why is the LM3291TME/NOPB marked as Not For New Designs?

A: This designation indicates the part has reached end-of-life status at Texas Instruments. New designs should utilize the LT5568-2EUF#TRPBF or equivalent active alternatives to ensure long-term supply chain stability.

Q: What are the key electrical differences between these modulators?

A: The LT5568-2EUF#TRPBF provides specified RF frequency range (700MHz ~ 1.05GHz), LO frequency range (550MHz ~ 1.25GHz), output power (-2.8dBm), and supply voltage (4.5V ~ 5.25V). The LM3291TME/NOPB electrical specifications are not provided in the available documentation.

Q: Is the LT5568-2EUF#TRPBF suitable for high-volume production?

A: Yes. Active product status and current inventory levels (2782 pcs) support production requirements. Verify long-term availability with Analog Devices Inc. for extended production schedules.