LFEC33E-3FN672C Equivalent & Substitute Parts

Part Overview

The LFEC33E-3FN672C is an EC series Field Programmable Gate Array (FPGA) manufactured by Lattice Semiconductor Corporation, featuring 496 I/O pins and 32,800 logic elements in a 672-BBGA package. This device is classified as obsolete, making identification of compatible substitute parts essential for ongoing system support and new design implementations. The ECP2 series provides a direct functional alternative with maintained electrical and mechanical compatibility.

Substiute Parts

LFEC33E-3FN672C

Lattice Semiconductor CorporationIn Stock: 869LFEC33E-3FN672C Datasheet

Current PartRFQ

LFE2-35E-5FN672C

Lattice Semiconductor CorporationIn Stock: 5351LFE2-35E-5FN672C Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LFEC33E-3FN672C is determined by the following critical parameters:

Package Compatibility: Both the main part and substitute must use the 672-BBGA (27x27) package to ensure mechanical fit and pin compatibility on existing PCBs.

Electrical Specifications: Supply voltage range (1.14V ~ 1.26V) and operating temperature range (0°C ~ 85°C) must be maintained or exceeded to ensure functional equivalence in the target application.

I/O Pin Count: The substitute part must provide sufficient I/O pins to support the design requirements. The LFEC33E-3FN672C provides 496 I/O pins.

Logic Capacity: Logic element count and RAM bit capacity determine whether the substitute can accommodate the original design's functional requirements.

Manufacturer Consistency: Parts from Lattice Semiconductor Corporation ensure design tool compatibility and technical support continuity.

The LFE2-35E-5FN672C meets all substitution criteria through identical package geometry, matching electrical specifications, and manufacturer continuity.

Parameter Comparison

Engineering Selection Recommendations

The LFE2-35E-5FN672C is the manufacturer-recommended substitute for the obsolete LFEC33E-3FN672C. Selection of this substitute is justified by the following factors:

Product Status: The LFE2-35E-5FN672C maintains active product status with current manufacturing support, ensuring long-term availability and supply chain stability compared to the obsolete LFEC33E-3FN672C.

Regulatory Compliance: Both parts maintain identical REACH and ECCN classifications, ensuring no change to export control or environmental compliance requirements.

Package and Electrical Equivalence: Identical 672-BBGA package geometry and matching supply voltage/temperature specifications enable direct substitution without PCB redesign or power supply modifications.

Design Capacity Considerations: The LFE2-35E-5FN672C provides 32,000 logic elements and 339,968 RAM bits compared to the original 32,800 logic elements and 434,176 RAM bits. The I/O count is 450 pins versus 496 pins on the original part. Design validation is required to confirm that the substitute's reduced I/O and memory capacity are sufficient for the target application.

Frequently Asked Questions (FAQ)

Q: Can the LFE2-35E-5FN672C be used as a direct drop-in replacement for the LFEC33E-3FN672C?

A: The LFE2-35E-5FN672C uses the same 672-BBGA (27x27) package and operates within identical voltage and temperature ranges, enabling physical and electrical compatibility. However, the reduced I/O count (450 vs. 496) and logic element capacity (32,000 vs. 32,800) require design validation to confirm functional equivalence for your specific application.

Q: What are the key differences between these two parts?

A: The primary differences are product series (EC vs. ECP2), I/O pin count (496 vs. 450), logic element count (32,800 vs. 32,000), and RAM capacity (434,176 vs. 339,968 bits). Both parts share identical package geometry, supply voltage range, operating temperature range, and regulatory classifications.

Q: Why is the LFEC33E-3FN672C obsolete?

A: The LFEC33E-3FN672C is classified as obsolete by the manufacturer. The LFE2-35E-5FN672C, with active product status, represents the current generation equivalent from Lattice Semiconductor Corporation.

Q: Are there any compliance or certification differences?

A: Both parts maintain identical REACH and ECCN classifications (3A991D), ensuring no change to regulatory or export control requirements. The LFE2-35E-5FN672C is RoHS3 compliant, providing additional environmental compliance assurance.

Q: What should I verify before implementing the LFE2-35E-5FN672C as a substitute?

A: Verify that your design does not require more than 450 I/O pins, 32,000 logic elements, or 339,968 RAM bits. Confirm that the ECP2 series architecture is compatible with your design tools and firmware. Validate power delivery and thermal management for the substitute part in your specific application context.