LFE5U-45F-8BG381I

The LFE5U-45F-8BG381I is an industrial-grade FPGA from the ECP5 family, optimized for mid-density logic integration in a compact 381‑FBGA footprint. It provides a balance of programmable logic, on-chip memory, and a broad I/O count for embedded and industrial designs requiring deterministic operation across a wide temperature range.

Built for system integration, this device combines 44,000 logic elements, approximately 1.99 Mbits of embedded memory, and 203 user I/Os in a surface-mount 381‑CABGA (17×17) package, operating from 1.045 V to 1.155 V and rated for −40 °C to 100 °C.

Key Features

• Logic Capacity — 44,000 logic elements to implement complex state machines, glue logic, and moderate-density processing tasks.
• Embedded Memory — Approximately 1.99 Mbits of on-chip RAM suitable for buffers, FIFOs, and small local data stores.
• I/O and Packaging — 203 user I/Os in a 381‑FBGA package; surface-mount 381‑CABGA (17×17) supplier package for compact PCB implementations.
• Industrial Grade — Rated for industrial operating temperatures from −40 °C to 100 °C for deployment in harsh environments.
• Power — Narrow core supply range of 1.045 V to 1.155 V for stable core operation across defined conditions.
• Compliance — RoHS‑compliant manufacturing to support restricted substance requirements.
• ECP5 Family Capabilities — As part of the ECP5 family (see family data sheet), architecture-level features include programmable I/O cells, clocking resources such as PLLs, DDR memory support, SERDES and physical coding sublayer blocks, and on-chip configuration options documented for the ECP5 family.

Typical Applications

• Industrial Control — Implement deterministic control logic and interface bridging with available I/Os and embedded memory while meeting industrial temperature requirements.
• Embedded Systems — Integrate peripherals, custom logic, and local buffering for compact embedded appliances using the 381‑FBGA package.
• Communications & I/O Bridging — Use the high I/O count and family-level SERDES/DDR capabilities to realize protocol converters, interface adapters, and data buffering.

Unique Advantages

• Balanced Integration: Combines 44,000 logic elements with nearly 2 Mbits of embedded memory to consolidate multiple discrete components into a single FPGA.
• Compact Package: 381‑FBGA (381‑CABGA 17×17) enables dense board layouts while providing 203 I/Os for flexible connectivity.
• Industrial Temperature Range: −40 °C to 100 °C rating supports deployment in temperature-challenging environments common in industrial applications.
• Controlled Core Supply: Tight core voltage range (1.045 V–1.155 V) reduces supply design variability and supports predictable power planning.
• Standards-Conscious Manufacturing: RoHS compliance helps meet environmental and regulatory requirements for product manufacturing.
• Family-Level Feature Set: Access to ECP5 family architecture elements—such as PLLs, programmable I/O, DDR support, SERDES, and configuration options—provides design flexibility documented in the ECP5 data sheet.

Why Choose LFE5U-45F-8BG381I?

The LFE5U-45F-8BG381I positions itself as a practical mid-density FPGA solution for engineers who need a combination of substantial logic capacity, embedded RAM, and a high I/O count in a compact, industrial-grade package. Its defined electrical and thermal operating windows and RoHS compliance make it suitable for production designs that require predictable behavior and regulatory alignment.

This device is appropriate for design teams consolidating glue logic, custom peripheral interfaces, and moderate buffering on a single FPGA while leveraging the documented ECP5 family capabilities for clocking, memory, and I/O programmability.

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