LFEC3E-5TN100C Equivalent & Substitute Parts

Part Overview

The LFEC3E-5TN100C is an EC series Field Programmable Gate Array (FPGA) manufactured by Lattice Semiconductor Corporation. This device features 67 I/O pins, 3100 logic elements, and 56320 total RAM bits in a 100-LQFP surface mount package. The product is currently obsolete, making identification of compatible substitute parts essential for ongoing system support, redesigns, and production continuity.

Substiute Parts

LFEC3E-5TN100C

Lattice Semiconductor CorporationIn Stock: 6157LFEC3E-5TN100C Datasheet

Current PartRFQ

LFE2-6E-5TN144C

Lattice Semiconductor CorporationIn Stock: 1629LFE2-6E-5TN144C Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LFEC3E-5TN100C is determined by the following critical parameters:

Electrical Compatibility:

• Supply voltage range: 1.14V ~ 1.26V (must match or be compatible)
• Logic element count: minimum 3100 cells required for functional equivalence
• RAM capacity: minimum 56320 bits required
• I/O pin count: minimum 67 pins required for signal routing

Physical & Manufacturing Compatibility:

• Mounting type: Surface Mount (required)
• Operating temperature range: 0°C ~ 85°C (TJ) (must meet or exceed)
• Moisture sensitivity level: MSL 3 or better (required)

Regulatory & Compliance:

• REACH Status: REACH Unaffected (maintained)
• ECCN: EAR99 (maintained)
• HTSUS: 8542.39.0001 (maintained)

The LFE2-6E-5TN144C meets all substitution criteria with enhanced specifications in logic elements (6000 vs. 3100), I/O count (90 vs. 67), and active product status.

Parameter Comparison

Engineering Selection Recommendations

The LFE2-6E-5TN144C is the qualified substitute for the obsolete LFEC3E-5TN100C based on the following factors:

Electrical Equivalence: Both devices operate at identical supply voltage (1.14V ~ 1.26V) and temperature range (0°C ~ 85°C TJ). The substitute provides equal RAM capacity (56320 bits) with enhanced logic element density (6000 vs. 3100).

Regulatory Compliance: The LFE2-6E-5TN144C maintains identical REACH, ECCN, and HTSUS classifications, ensuring compliance continuity in regulated applications.

Product Availability: The substitute is in active production status with confirmed inventory (1589 pcs), whereas the main part is obsolete. This ensures long-term supply chain viability.

Physical Integration Consideration: The substitute uses a 144-LQFP package (20x20mm) compared to the 100-LQFP package (14x14mm) of the main part. PCB layout redesign is required to accommodate the larger package footprint and increased I/O pin count (90 vs. 67).

Frequently Asked Questions (FAQ)

Q: Can the LFE2-6E-5TN144C directly replace the LFEC3E-5TN100C without design changes?

A: Electrical substitution is valid; however, physical redesign is required. The substitute uses a larger 144-LQFP package versus the 100-LQFP package of the original part. PCB layout modifications are necessary to accommodate the different package dimensions and additional I/O pins.

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

A: Yes. Both devices operate at 1.14V ~ 1.26V supply voltage, eliminating the need for power supply modifications.

Q: What is the significance of the increased logic element count in the substitute?

A: The LFE2-6E-5TN144C provides 6000 logic elements versus 3100 in the original part. This enhancement provides additional design margin and supports more complex FPGA configurations without functional limitations.

Q: Does the substitute maintain the same moisture sensitivity level?

A: Yes. Both parts are classified as MSL 3 (168 Hours), requiring identical handling and storage protocols.

Q: Are there any compliance or regulatory differences between the two parts?

A: No. Both parts maintain identical REACH, ECCN (EAR99), and HTSUS classifications, ensuring regulatory equivalence in all jurisdictions.

Q: What is the primary reason for substitution?

A: The LFEC3E-5TN100C is obsolete. The LFE2-6E-5TN144C is the manufacturer-recommended substitute with active production status and confirmed availability.