Lattice Semiconductor LFEC20E-3FN484I FPGA Equivalent & Substitute Parts

Part Overview

The LFEC20E-3FN484I is an EC series Field Programmable Gate Array (FPGA) manufactured by Lattice Semiconductor Corporation, featuring 360 I/O pins and 19,700 logic elements in a 484-BBGA package. This device is classified as obsolete, making identification of compatible substitute parts essential for ongoing system support and new design implementations. The EC series has been superseded by newer FPGA architectures, requiring careful parameter alignment when selecting replacement components.

Substiute Parts

LFEC20E-3FN484I

Lattice Semiconductor CorporationIn Stock: 1011LFEC20E-3FN484I Datasheet

Current PartRFQ

LFE2-20E-5FN484I

Lattice Semiconductor CorporationIn Stock: 770LFE2-20E-5FN484I Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LFEC20E-3FN484I is determined by the following critical parameters:

Package Compatibility: Both the main part and substitute must use the 484-BBGA package with identical 23x23mm physical dimensions to ensure PCB footprint compatibility and reflow soldering process alignment.

Electrical Interface: Supply voltage range (1.14V ~ 1.26V) and operating temperature range (-40°C ~ 100°C) must be maintained to ensure functional compatibility within existing power delivery and thermal management systems.

I/O Pin Count: The substitute part must provide sufficient I/O pins to accommodate the signal routing requirements of the original design. The LFEC20E-3FN484I provides 360 I/O pins.

Logic Capacity: The substitute must provide adequate logic elements and RAM bits to support the implemented design. The LFEC20E-3FN484I contains 19,700 logic elements and 434,176 RAM bits.

Mounting and Environmental Compliance: Surface mount technology, MSL rating, and regulatory compliance (REACH, ECCN, HTSUS) must align with manufacturing and supply chain requirements.

Parameter Comparison

Engineering Selection Recommendations

The LFE2-20E-5FN484I is the manufacturer-recommended substitute for the obsolete LFEC20E-3FN484I. Both devices share identical package geometry (484-FPBGA 23x23mm), supply voltage range (1.14V ~ 1.26V), operating temperature range (-40°C ~ 100°C), and MSL rating (3, 168 Hours). Both comply with identical regulatory classifications (ECCN 3A991D, HTSUS 8542.39.0001, REACH Unaffected).

The LFE2-20E-5FN484I is an active product with ROHS3 compliance, providing enhanced supply chain availability compared to the obsolete EC series. The ECP2 series offers 21,000 logic elements, exceeding the 19,700 elements of the original part, providing additional design margin for logic implementation.

Design considerations include the reduction in I/O pin count from 360 to 331 pins and the reduction in total RAM bits from 434,176 to 282,624 bits. These differences require design verification to confirm compatibility with existing signal routing and memory requirements.

Frequently Asked Questions (FAQ)

Q: Can the LFE2-20E-5FN484I directly replace the LFEC20E-3FN484I without PCB modifications?

A: Both devices use the 484-BBGA package with identical 23x23mm physical dimensions, enabling direct PCB footprint compatibility. However, the reduction in I/O pin count (360 to 331) and RAM bits (434,176 to 282,624) requires design verification to confirm functional compatibility with the implemented application.

Q: What is the significance of the product status change from Obsolete to Active?

A: The LFEC20E-3FN484I is classified as obsolete, indicating discontinued manufacturing and limited supply availability. The LFE2-20E-5FN484I is active, ensuring ongoing manufacturing support, improved supply chain availability, and long-term component sourcing reliability.

Q: Are the supply voltage and operating temperature ranges identical?

A: Yes. Both the LFEC20E-3FN484I and LFE2-20E-5FN484I operate at 1.14V ~ 1.26V supply voltage and -40°C ~ 100°C junction temperature, ensuring compatibility with existing power delivery and thermal management infrastructure.

Q: What regulatory compliance differences exist between these parts?

A: Both devices share identical ECCN (3A991D) and HTSUS (8542.39.0001) classifications and REACH Unaffected status. The LFE2-20E-5FN484I includes ROHS3 compliance certification, providing enhanced environmental regulatory alignment for new designs.

Q: How do the logic element and RAM bit differences affect substitution?

A: The LFE2-20E-5FN484I provides 21,000 logic elements compared to 19,700 in the original part, offering additional logic capacity. However, RAM bits are reduced from 434,176 to 282,624 bits. Design verification is required to confirm that the implemented design fits within the substitute part's resource constraints.

Q: Is the MSL rating identical for both parts?

A: Yes. Both devices have an MSL rating of 3 with a 168-hour moisture absorption limit, ensuring identical handling, storage, and reflow soldering requirements.