LFEC20E-3FN484C Equivalent & Substitute Parts

Part Overview

The LFEC20E-3FN484C is an EC series Field Programmable Gate Array (FPGA) manufactured by Lattice Semiconductor, featuring 360 I/O pins and 19,700 logic elements in a 484-BBGA package. This device is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production support. The ECP2 series successor provides enhanced logic capacity and active product status while maintaining electrical and mechanical compatibility within defined parameters.

Substiute Parts

LFEC20E-3FN484C

Lattice SemiconductorIn Stock: 813LFEC20E-3FN484C Datasheet

Current PartRFQ

LFE2-20E-5FN484C

Lattice Semiconductor CorporationIn Stock: 1531LFE2-20E-5FN484C Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LFEC20E-3FN484C is determined by the following critical parameters:

• Package Compatibility: Both main and substitute parts use 484-BBGA (484-FPBGA 23x23) surface mount packaging, ensuring mechanical and thermal compatibility
• Voltage Supply Range: Identical 1.14V ~ 1.26V supply voltage requirement maintains electrical compatibility
• Operating Temperature Range: Both devices operate within 0°C ~ 85°C (TJ), ensuring thermal envelope compatibility
• Mounting Type: Surface mount technology is consistent across both parts
• Regulatory Compliance: Both parts share REACH Unaffected status and identical ECCN/HTSUS classifications

The LFE2-20E-5FN484C qualifies as a substitute based on these matching parameters. While the substitute part offers increased logic capacity (21,000 elements vs. 19,700) and different I/O count (331 vs. 360), these represent functional enhancements rather than incompatibilities. The substitute maintains the same electrical interface, thermal characteristics, and regulatory standing.

Parameter Comparison

Engineering Selection Recommendations

The LFE2-20E-5FN484C is the manufacturer-recommended substitute for the obsolete LFEC20E-3FN484C. Selection should be based on the following factors:

Product Status: The LFEC20E-3FN484C is obsolete, limiting long-term availability and support. The LFE2-20E-5FN484C maintains active product status, ensuring continued manufacturing, technical support, and supply chain stability.

Regulatory Compliance: Both parts maintain identical REACH Unaffected status and ECCN/HTSUS classifications, ensuring no change to regulatory or export requirements.

Electrical Interface: Identical voltage supply range (1.14V ~ 1.26V) and operating temperature range (0°C ~ 85°C) guarantee direct electrical compatibility without power supply or thermal management modifications.

Physical Compatibility: Both devices use 484-BBGA packaging with identical 23x23mm footprint and surface mount technology, allowing direct PCB layout reuse without redesign.

Functional Differences: The substitute provides 21,000 logic elements compared to 19,700 in the original part, representing a functional enhancement. However, the substitute has 331 I/O pins versus 360 in the original. Design teams must verify that the reduced I/O count does not conflict with application requirements before implementation.

Frequently Asked Questions (FAQ)

Q: Can the LFE2-20E-5FN484C be used as a direct replacement for the LFEC20E-3FN484C?

A: The LFE2-20E-5FN484C is electrically and mechanically compatible based on matching voltage supply, operating temperature, package type, and footprint. However, the I/O count differs (331 vs. 360 pins). Direct replacement is possible only if the application does not require all 360 I/O pins of the original device.

Q: What are the key compatibility criteria for FPGA substitution in this product category?

A: Critical parameters include package type (484-BBGA), voltage supply range (1.14V ~ 1.26V), operating temperature range (0°C ~ 85°C), and physical footprint (23x23mm). These parameters determine whether a substitute can function in the same PCB assembly without hardware modifications.

Q: Why does the substitute part have fewer I/O pins?

A: The LFE2-20E-5FN484C (331 I/O) and LFEC20E-3FN484C (360 I/O) represent different product lines within Lattice Semiconductor's FPGA portfolio. The ECP2 series prioritizes logic capacity and memory configuration over I/O count. Design teams must confirm that application requirements can be met with the reduced I/O availability.

Q: Are there differences in RAM capacity between these parts?

A: Yes. The LFEC20E-3FN484C provides 434,176 RAM bits, while the LFE2-20E-5FN484C provides 282,624 RAM bits. Applications requiring the full RAM capacity of the original part may not be compatible with the substitute without design modifications.

Q: What is the significance of the obsolete product status?

A: Obsolete status indicates that the LFEC20E-3FN484C is no longer manufactured or supported by Lattice Semiconductor. Existing inventory may be limited, and technical support is unavailable. The LFE2-20E-5FN484C, with active product status, ensures ongoing availability and manufacturer support for new designs.

Q: Are moisture sensitivity levels identical?

A: Yes. Both parts carry MSL 3 (168 Hours) rating, indicating identical moisture handling and storage requirements during manufacturing and assembly processes.