ORSO82G5-3FN680C Equivalent & Substitute Parts

Part Overview

The ORSO82G5-3FN680C is an ORCA® 4 Field Programmable Gate Array (FPGA) manufactured by Lattice Semiconductor Corporation. This device features 372 I/O pins, 10,368 logic elements, and 113,664 total RAM bits in a 680-BBGA package. The product is currently obsolete, making identification of compatible substitute components essential for ongoing system support, design updates, and production continuity.

Substiute Parts

ORSO82G5-3FN680C

Lattice Semiconductor CorporationIn Stock: 796ORSO82G5-3FN680C Datasheet

Current PartRFQ

LFE3-35EA-8FN672C

Lattice Semiconductor CorporationIn Stock: 1032LFE3-35EA-8FN672C Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The LFE3-35EA-8FN672C is identified as a manufacturer-recommended substitute for the ORSO82G5-3FN680C. Substitution eligibility is determined by the following critical parameters:

Substitution Criteria:

• Manufacturer: Both parts manufactured by Lattice Semiconductor Corporation
• Mounting Type: Both are surface mount devices
• Moisture Sensitivity Level: Both rated MSL 3 (168 Hours)
• Regulatory Compliance: Both REACH Unaffected with matching ECCN and HTSUS classifications
• Package Type: Both utilize FPGA BGA packaging (680-FPBGA and 672-FPBGA respectively)
• Product Status: Substitute is Active, ensuring ongoing availability and support

The substitute part represents a different FPGA architecture (ECP3 series versus ORCA® 4 series) with modified electrical and functional specifications. Compatibility requires design-level evaluation of logic element count, RAM capacity, I/O pin count, and voltage supply requirements for the target application.

Parameter Comparison

Engineering Selection Recommendations

Selection between the ORSO82G5-3FN680C and LFE3-35EA-8FN672C must account for the following factors:

Product Status Consideration: The ORSO82G5-3FN680C is obsolete. The LFE3-35EA-8FN672C is active and supported by the manufacturer, ensuring availability of documentation, design tools, and technical support.

Regulatory and Compliance Alignment: Both parts share identical REACH status (REACH Unaffected), ECCN classification (3A991D), and HTSUS code (8542.39.0001), ensuring equivalent regulatory treatment in procurement and export scenarios.

Packaging and Assembly: Both devices employ surface mount BGA technology with identical MSL ratings. PCB layout modifications are required due to different package footprints (680-FPBGA versus 672-FPBGA) and pin counts (372 versus 310 I/O).

Electrical and Functional Differences: The substitute part operates at a narrower voltage range (1.14V ~ 1.26V versus 1.425V ~ 3.6V) and provides significantly higher logic element density (33,000 versus 10,368) and RAM capacity (1,358,848 versus 113,664 bits). These differences require design-level validation to confirm functional compatibility with the target application.

Frequently Asked Questions (FAQ)

Q: Can the LFE3-35EA-8FN672C be used as a direct replacement for the ORSO82G5-3FN680C?

A: Direct replacement is not possible without design modifications. While both are Lattice Semiconductor FPGAs with compatible regulatory status and MSL ratings, they differ in package footprint, pin count, voltage supply range, and logic architecture. PCB layout redesign and firmware recompilation are required.

Q: What are the key differences in I/O capability between these parts?

A: The ORSO82G5-3FN680C provides 372 I/O pins, while the LFE3-35EA-8FN672C provides 310 I/O pins. Applications requiring more than 310 I/O connections cannot use the substitute without external multiplexing or alternative design approaches.

Q: How do the voltage supply requirements differ?

A: The ORSO82G5-3FN680C operates across 1.425V to 3.6V, supporting broader voltage range applications. The LFE3-35EA-8FN672C operates across 1.14V to 1.26V, requiring tighter power supply regulation and limiting compatibility with legacy 3.3V or 5V systems without level translation.

Q: Are the package dimensions compatible with existing PCB designs?

A: No. The ORSO82G5-3FN680C uses a 680-FPBGA (35x35mm) package, while the LFE3-35EA-8FN672C uses a 672-FPBGA (27x27mm) package. Different footprints, ball counts, and pitch require complete PCB redesign.

Q: What is the impact of the higher logic element count in the substitute part?

A: The LFE3-35EA-8FN672C provides 33,000 logic elements versus 10,368 in the original part. This provides greater design flexibility and capacity for complex logic implementations, but does not guarantee functional equivalence without design validation.

Q: Are both parts subject to the same export controls?

A: Yes. Both parts share identical ECCN (3A991D) and HTSUS (8542.39.0001) classifications, ensuring equivalent treatment under export control regulations and tariff schedules.