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LFEC33E-4FN672C Equivalent & Substitute Parts
Part Overview
The LFEC33E-4FN672C is an EC series Field Programmable Gate Array (FPGA) manufactured by Lattice Semiconductor Corporation, featuring 496 I/O pins and 32,800 logic elements in a 672-BBGA package. This device is classified as obsolete, making identification of compatible substitute parts essential for ongoing system support and new design implementations. The ECP2 series provides a direct functional alternative with maintained electrical and mechanical compatibility.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer | Lattice Semiconductor Corporation |
| Series | EC |
| Logic Elements/Cells | 32,800 |
| Total RAM Bits | 434,176 |
| Number of I/O | 496 |
| Voltage Supply Range | 1.14V – 1.26V |
| Operating Temperature | 0°C – 85°C (TJ) |
| Package Type | 672-BBGA (27×27) |
| Mounting Type | Surface Mount |
| Moisture Sensitivity Level | 3 (168 Hours) |
| Product Status | Obsolete |
Substitute Part Grouping Explanation
Substitution of the LFEC33E-4FN672C is determined by the following critical parameters:
Electrical Compatibility: Supply voltage range (1.14V – 1.26V) and operating temperature range (0°C – 85°C) must be maintained.
Mechanical Compatibility: Package type (672-BBGA) and pin count (496 I/O) establish physical and electrical interface requirements.
Functional Capacity: Logic element count (32,800), RAM capacity (434,176 bits), and I/O configuration must support the original application requirements.
Environmental & Compliance: Moisture sensitivity level (MSL 3), REACH status, and ECCN classification must align with supply chain and regulatory requirements.
The LFE2-35E-5FN672C meets all substitution criteria through identical package geometry, matching supply voltage and temperature specifications, and equivalent logic density within acceptable tolerance.
Parameter Comparison
| Parameter | LFEC33E-4FN672C | LFE2-35E-5FN672C | Compatibility |
|---|---|---|---|
| Manufacturer | Lattice Semiconductor | Lattice Semiconductor | Match |
| Package Type | 672-BBGA (27×27) | 672-BBGA (27×27) | Match |
| Number of I/O | 496 | 450 | Substitute has reduced I/O |
| Logic Elements | 32,800 | 32,000 | Substitute has reduced capacity |
| Total RAM Bits | 434,176 | 339,968 | Substitute has reduced capacity |
| Voltage Supply | 1.14V – 1.26V | 1.14V – 1.26V | Match |
| Operating Temperature | 0°C – 85°C | 0°C – 85°C | Match |
| Mounting Type | Surface Mount | Surface Mount | Match |
| Moisture Sensitivity | MSL 3 (168 Hours) | MSL 3 (168 Hours) | Match |
| Product Status | Obsolete | Active | Substitute is active |
| REACH Status | REACH Unaffected | REACH Unaffected | Match |
| ECCN | 3A991D | 3A991D | Match |
Engineering Selection Recommendations
The LFE2-35E-5FN672C is the manufacturer-recommended substitute for the obsolete LFEC33E-4FN672C. Selection of this substitute is supported by:
Regulatory Compliance: Both devices maintain identical REACH status (REACH Unaffected) and ECCN classification (3A991D), ensuring supply chain continuity and export compliance.
Active Product Status: The LFE2-35E-5FN672C is classified as active, providing long-term availability and manufacturing support compared to the obsolete EC series.
Electrical & Thermal Equivalence: Matching supply voltage (1.14V – 1.26V) and operating temperature range (0°C – 85°C) eliminate power delivery and thermal management redesign requirements.
Package & Mounting Compatibility: Identical 672-BBGA package geometry and surface mount configuration enable direct PCB layout reuse without modification.
Functional Capacity Consideration: The substitute provides 32,000 logic elements (versus 32,800) and 450 I/O pins (versus 496). Application designs must confirm that reduced logic density and I/O count do not exceed system requirements.
Frequently Asked Questions (FAQ)
Q: Can the LFE2-35E-5FN672C be used as a direct replacement without PCB modification?
A: The identical 672-BBGA package and pin pitch enable direct PCB placement without layout changes. However, the reduced I/O count (450 versus 496) requires verification that all signal connections map to available pins on the substitute device.
Q: What is the difference in logic capacity between these devices?
A: The LFEC33E-4FN672C contains 32,800 logic elements and 434,176 RAM bits. The LFE2-35E-5FN672C contains 32,000 logic elements and 339,968 RAM bits. Design implementations must confirm that reduced capacity is acceptable for the target application.
Q: Are the power supply requirements identical?
A: Both devices operate within the same supply voltage range of 1.14V – 1.26V and the same temperature range of 0°C – 85°C, eliminating power delivery redesign.
Q: Does the substitute maintain the same moisture sensitivity level?
A: Both devices are classified as MSL 3 (168 Hours), requiring identical handling and storage protocols.
Q: Why is the original part obsolete?
A: The LFEC33E-4FN672C is an older EC series device. Lattice Semiconductor has transitioned to the ECP2 series, which provides improved performance and extended product lifecycle support.
Q: Are there any compliance differences between the two devices?
A: Both devices share identical REACH status (REACH Unaffected) and ECCN classification (3A991D), ensuring equivalent regulatory and export compliance.
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