LFE5U-45F-6BG381C

The LFE5U-45F-6BG381C is an ECP5 family Field Programmable Gate Array (FPGA) from Lattice Semiconductor Corporation, supplied in a 381‑FBGA package. It provides a balanced combination of logic capacity, on‑chip memory and I/O resources for commercial embedded designs.

With 44,000 logic elements, approximately 1.99 Mbits of embedded memory and 203 user I/O pins, this device is suited to applications that require moderate logic density, flexible I/O and on‑chip memory while operating within a commercial temperature range and a narrow core supply window.

Key Features

• Core Logic  44,000 logic elements (as listed in the product specifications) for implementing combinational and sequential logic functions.
• Embedded Memory  Approximately 1.99 Mbits of on‑chip RAM for data buffering, FIFOs and small lookup tables.
• I/O Resources  203 available I/O pins to support parallel interfaces, control signals and multiple peripheral connections.
• Programmable Fabric and DSP  Device family datasheet documents sysDSP slices and programmable routing and slice architectures for embedded signal processing and custom datapaths.
• High‑speed Interfaces and SERDES  The ECP5 family documentation includes SERDES and Physical Coding Sublayer (PCS) blocks and a flexible dual SERDES architecture for serial link implementations.
• Memory Interface Support  Datasheet coverage includes DDR memory support, DQS grouping and DLL/DQS calibration blocks for external memory interfacing.
• Power and Supply  Core supply operating range specified at 1.045 V to 1.155 V for regulated power design.
• Package & Mounting  381‑FBGA supplier package (381‑CABGA, 17×17) with surface‑mount mounting type for compact board integration.
• Operating Grade  Commercial grade device with an operating temperature range of 0 °C to 85 °C.
• Compliance  RoHS‑compliant construction for regulatory and environmental considerations.

Typical Applications

• High‑speed data communications  Use the device’s documented SERDES and PCS blocks to implement serial links and protocol bridging in communications modules.
• Memory interface and buffering  Leverage DDR support and approximately 1.99 Mbits of embedded memory for external memory controllers, buffer management and interface logic.
• Embedded signal processing  Implement DSP and custom datapath functions using the device fabric and sysDSP slice architecture described in the datasheet.
• I/O‑intensive control and bridging  The 203 I/O pins enable parallel buses, sensor interfaces and system control logic for industrial and commercial embedded systems.

Unique Advantages

• Substantial logic capacity: 44,000 logic elements provide room for moderate to complex FPGA implementations without external glue logic.
• On‑chip memory integration: Approximately 1.99 Mbits of embedded RAM reduces dependence on external memory for many buffering and storage tasks.
• Broad I/O count: 203 I/O pins allow flexible partitioning between high‑speed interfaces, control signals and peripheral connections.
• Documented high‑speed and memory features: Datasheet coverage of SERDES, PCS, DDR support and DLL/DQS calibration provides design guidance for high‑performance interfaces.
• Compact SMD package: 381‑FBGA (381‑CABGA, 17×17) surface‑mount package suitable for space‑constrained board designs.
• Commercial temperature and RoHS compliance: Designed for commercial applications with a 0 °C to 85 °C range and RoHS‑compliant manufacturing.

Why Choose LFE5U-45F-6BG381C?

The LFE5U-45F-6BG381C positions itself as a well‑balanced FPGA option within the ECP5 family, delivering a combination of 44,000 logic elements, nearly 2 Mbits of embedded RAM and a high I/O count in a compact 381‑FBGA package. Its documented features for SERDES, DDR memory interfacing and DSP‑oriented slices make it suitable for designs that need on‑chip processing, memory buffering and high‑speed links while remaining within a commercial temperature envelope.

This device is appropriate for engineers and procurement teams targeting scalable FPGA resources with clear electrical and mechanical specifications—core supply range, I/O count, package and operating temperature—backed by the ECP5 family datasheet detail for system integration and validation.

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