LFE5U-85F-6BG381C

The LFE5U-85F-6BG381C is a commercial‑grade FPGA IC from Lattice Semiconductor's ECP5 family. It combines a high logic capacity, embedded RAM, and a broad I/O complement in a compact 381‑FBGA package for surface‑mount assembly.

Designed for commercial embedded designs that require configurable digital logic, on‑chip memory and flexible I/O, this device delivers integration and predictable electrical characteristics (supply 1.045 V–1.155 V, operating temperature 0 °C–85 °C) suitable for a wide range of non‑safety‑critical applications.

Key Features

• Logic Capacity — 84,000 logic elements for implementing custom digital functions, glue logic and state machines.
• Embedded Memory — Approximately 3.83 Mbits of on‑chip RAM to support buffering, lookup tables and small data stores.
• I/O — 205 user I/Os for flexible interfacing with external peripherals and buses.
• Package & Mounting — 381‑FBGA (381‑CABGA, 17×17) in a surface‑mount form factor for dense board integration.
• Power and Temperature — Recommended supply voltage range of 1.045 V to 1.155 V and commercial operating range of 0 °C to 85 °C.
• ECP5 Family Architecture — Includes family features documented in the ECP5 data sheet such as sysCLOCK PLLs, flexible clock distribution, programmable I/O cells, DDR memory support and SERDES/PCS blocks for serial interfaces.
• Compliance — RoHS‑compliant for environmental/assembly considerations.

Typical Applications

• Commercial Embedded Systems — Implement custom logic, protocol bridging and control functions where a commercial‑grade FPGA form factor and I/O count are required.
• Memory Interface and Data Buffering — Use on‑chip RAM and DDR support features for buffering and interface logic in systems that require local data staging.
• High‑I/O Control and Glue Logic — Leverage 205 I/Os for connecting sensors, switches, displays and peripheral buses in compact designs.
• Serial and Protocol Bridging — Employ the ECP5 family’s SERDES and PCS capabilities to implement high‑speed serial links and protocol conversion in commercial equipment.

Unique Advantages

• High Logic Density: 84,000 logic elements enable consolidation of multiple functions into a single device, reducing bill‑of‑materials and board area.
• Significant Embedded Memory: Approximately 3.83 Mbits of RAM supports local data handling without immediate external memory dependency.
• Extensive I/O: 205 user I/Os provide design flexibility for complex peripheral and bus connections.
• Compact Surface‑Mount Package: 381‑FBGA (17×17) minimizes PCB footprint while supporting high pin counts for dense integration.
• Controlled Power and Thermal Window: Defined supply range (1.045 V–1.155 V) and commercial temperature rating simplify power design and thermal planning for mainstream applications.
• Documented ECP5 Family Features: Clocking, programmable I/O, DDR support and SERDES/PCS building blocks are described in the ECP5 data sheet to aid design and verification.

Why Choose LFE5U-85F-6BG381C?

The LFE5U-85F-6BG381C offers a balanced combination of logic capacity, embedded memory and I/O density in a compact commercial‑grade FBGA package. It is suitable for designers who need configurable digital resources, on‑chip RAM and flexible interfacing within the electrical and temperature ranges specified for commercial applications.

As a member of the Lattice ECP5 family, this device aligns with the architectural elements and documented features in the ECP5 data sheet—providing predictable behavior for clocking, I/O and serial interface functions that support scalable design implementations.

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