LFEC33E-3FN484I Equivalent & Substitute Parts

Part Overview

The LFEC33E-3FN484I is an EC series Field Programmable Gate Array (FPGA) manufactured by Lattice Semiconductor Corporation, featuring 360 I/O pins and 32,800 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 where legacy compatibility is required.

Substiute Parts

LFEC33E-3FN484I

Lattice Semiconductor CorporationIn Stock: 1142LFEC33E-3FN484I Datasheet

Current PartRFQ

LFE2-35E-5FN484I

Lattice Semiconductor CorporationIn Stock: 1174LFE2-35E-5FN484I Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LFEC33E-3FN484I is determined by the following critical parameters:

• Package Compatibility: Both main and substitute parts must use the 484-BBGA package format with identical 23x23mm dimensions to ensure PCB footprint compatibility
• Voltage Supply Range: Supply voltage must fall within 1.14V ~ 1.26V to maintain electrical compatibility with existing power delivery infrastructure
• I/O Pin Count: The substitute part must provide sufficient I/O pins to support the original design's signal routing requirements
• Logic Element Capacity: The substitute must provide adequate logic resources to accommodate the design implementation
• Operating Temperature Range: The substitute must support the -40°C ~ 100°C operating temperature specification
• Mounting Type: Surface mount technology must be maintained for assembly compatibility
• Regulatory Compliance: REACH and ECCN classifications must align with the original part's regulatory status

The LFE2-35E-5FN484I qualifies as a substitute based on these parameters.

Parameter Comparison

Engineering Selection Recommendations

The LFE2-35E-5FN484I serves as the manufacturer-recommended substitute for the obsolete LFEC33E-3FN484I. Both devices maintain identical electrical specifications including supply voltage range (1.14V ~ 1.26V), operating temperature range (-40°C ~ 100°C), and package format (484-BBGA, 23x23mm). Both parts carry equivalent regulatory compliance status with REACH Unaffected designation and matching ECCN and HTSUS classifications.

The substitute part operates as an active product, ensuring ongoing availability and supply chain continuity. The LFE2-35E-5FN484I belongs to the ECP2 series, representing a more current FPGA architecture compared to the obsolete EC series. While the substitute provides slightly reduced logic element capacity (32,000 versus 32,800) and I/O count (331 versus 360), it maintains sufficient resources for most legacy design implementations. The reduction in total RAM bits (339,968 versus 434,176) should be evaluated against specific application memory requirements.

Frequently Asked Questions (FAQ)

Q: Can the LFE2-35E-5FN484I directly replace the LFEC33E-3FN484I on existing PCBs?

A: Yes, both devices use identical 484-BBGA packaging with matching 23x23mm dimensions, enabling direct PCB footprint compatibility without layout modifications.

Q: Are the power supply requirements identical between these parts?

A: Both parts operate within the same supply voltage range of 1.14V ~ 1.26V, allowing use of existing power delivery infrastructure without modification.

Q: What are the differences in logic capacity between these devices?

A: The LFEC33E-3FN484I provides 32,800 logic elements and 434,176 RAM bits, while the LFE2-35E-5FN484I provides 32,000 logic elements and 339,968 RAM bits. The substitute offers approximately 97.6% of the original logic capacity and 78.3% of the original RAM capacity.

Q: What is the difference in I/O pin availability?

A: The LFEC33E-3FN484I provides 360 I/O pins, while the LFE2-35E-5FN484I provides 331 I/O pins. Design implementations must accommodate this 29-pin reduction in available I/O resources.

Q: Are the operating temperature ranges compatible?

A: Both devices support identical operating temperature specifications of -40°C ~ 100°C (TJ), ensuring thermal compatibility in equivalent application environments.

Q: Do both parts meet the same regulatory requirements?

A: Yes, both parts carry REACH Unaffected status, matching ECCN classification (3A991D), and identical HTSUS codes (8542.39.0001), ensuring equivalent regulatory compliance.

Q: What is the product status difference between these parts?

A: The LFEC33E-3FN484I is classified as obsolete, while the LFE2-35E-5FN484I is an active product with ongoing manufacturer support and supply availability.