LFE2-20E-5F672I - 21K LUT FPGA, 402 I/O, 1.2V | Lattice
MPN： LFE2-20E-5F672I ✓ 啟用中LFE2-20E-5F672I 概覽
An FPGA is a reconfigurable semiconductor whose logic, memory, and signal-processing functions are defined after fabrication. Within the product hierarchy, an FPGA belongs to programmable logic devices and broadens the capabilities of fixed-function logic ICs. ECP2 devices combine configurable LUT-based logic, embedded memory, dedicated DSP resources, and programmable I/O for designs requiring adaptable parallel processing, interface bridging, control, and signal conditioning.
The LFE2-20E-5F672I provides approximately 21,000 logic cells, 21K LUTs, 402 I/O, 282,624 embedded-memory bits, and DSP resources. Its 1.2 V core operating voltage supports contemporary low-voltage digital systems, while the -5 speed designation identifies its performance grade. The large 672-pin FBGA provides substantial I/O capacity for high-pin-count memory, communications, control, and industrial interface designs.
The ECP2 architecture allows logic functions to be assembled from LUTs and routed through a programmable interconnect. Embedded memory supports buffering and data storage, while DSP blocks accelerate arithmetic operations commonly needed in filtering, signal processing, and control loops. Boundary-level I/O resources can be assigned to supported standards and interfaces, reducing reliance on external interface components when board constraints permit.
Typical uses include industrial automation, communications infrastructure, embedded control, video and image processing, instrumentation, and high-density interface consolidation. The 402-I/O count is especially useful for designs connecting multiple memory devices, sensors, converters, transceivers, and parallel buses. The industrial-temperature grade supports designs where extended operating-temperature capability is required.
PCB implementation requires careful attention to the 672-ball package, power integrity, decoupling, and high-speed routing. Place the 1.2 V and auxiliary supply decoupling capacitors close to their associated balls, follow the reference design for ball assignment and configuration, and preserve continuous return paths beneath high-speed signal routes. Configuration and programming requirements must also be planned before final schematic capture.
This product record combines the confirmed device identity, package, logic capacity, speed grade, supply voltage, and available drop-in references with practical guidance for FPGA design, sourcing, comparison, and qualification. It supports faster engineering decisions while keeping package compatibility and manufacturer-document verification central to replacement selection.
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LFE2-20SE-5FN672I
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LFE2-20E-5FN672I
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LFE2-20E-6FN672C
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LFE2-20E-4FN672C
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
LFE2-20E-5F672C
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查看資料表 →LFE2-20E-5F672I 最大額定值與電氣特性
| Device Type | ECP2 FPGA |
| Logic Cells | 21000 cells |
| Lookup Tables | 21K LUTs |
| User I/O | 402 I/O |
| Embedded Memory | 282624 bits |
| Core Supply Voltage | 1.2 V |
| Speed Grade | -5 |
| Temperature Grade | Industrial |
| FPGA Family | LatticeECP2 |
| Process Technology | 90 nm |
| DSP Resources | DSP resources included |
| 封裝 | 672-pin FBGA |
| Package Family | FBGA |
| 安裝類型 | Surface Mount |
| Configuration | SRAM FPGA configuration |
| Programmable Logic | LUT-based FPGA |
| Embedded Memory Type | Block RAM |
LFE2-20E-5F672I fbga 腳位配置指南
LFE2-20E-5F672I（fbga 封裝）的腳位配置。 此數位 IC 包含 GPIO、通訊介面（UART、SPI、I2C）與電源腳位。替代腳位功能與配置選項請參閱製造商資料表。對嵌入式系統設計與 PCB 佈局至關重要。
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典型應用
LFE2-20E-5F672I 適用於 6 應用s: Industrial Automation Controller, High-Speed Interface Consolidation, Digital Signal Processing, Video and Image Processing, Communications Infrastructure, Instrumentation and Test Equipment.
Industrial Automation Controller
The LFE2-20E-5F672I fits industrial automation controllers because its 21K LUTs can implement sequencing, state machines, communications, and control logic while 402 I/O connect sensors, actuators, and field buses. The 1.2 V core supports modern control electronics, and the -5 speed grade provides useful timing headroom for deterministic logic. Its industrial-temperature designation is appropriate for equipment operating beyond commercial-temperature conditions. Designers should assign available I/O according to voltage-tolerance and standard-support rules, then verify timing against the slowest industrial operating condition. Separate auxiliary and core supply rails, local decoupling, configuration storage, and watchdog or reset behavior must be included in the power and control architecture.
推薦
High-Speed Interface Consolidation
With 402 user I/O, the LFE2-20E-5F672I can consolidate parallel data paths, memory interfaces, and protocol conversion logic in a single ECP2 FPGA. The 21K LUTs provide enough configurable logic for clock-domain control, data alignment, buffering, and state management, while DSP resources can support arithmetic operations alongside the interface path. Its -5 speed grade is advantageous when timing margins are important in synchronous systems. The 672-pin FBGA requires deliberate escape routing and power planning, especially when high-speed groups terminate on adjacent balls. Engineers should use the manufacturer's supported I/O standards, preserve matched-length relationships where required, and validate signal-integrity behavior with realistic loading and clock assumptions.
推薦
Digital Signal Processing
The LFE2-20E-5F672I can implement fixed-point filtering, modulation, demodulation, waveform generation, and control algorithms using its LUT fabric, embedded memory, and DSP resources. Twenty-one thousand logic cells permit datapath control and peripheral logic to coexist with the DSP pipeline, reducing the need for separate programmable devices. The -5 grade and 1.2 V core support a modern implementation platform, while 402 I/O provide parallel data, clock, and control connectivity. Practical implementations should pipelize timing-critical arithmetic, account for memory-port limitations, and avoid using general routing for wide buses when dedicated resources can be assigned. Fixed-point scaling, accumulator width, saturation, and clock-domain crossings should be documented and verified through simulation and timing analysis.
推薦
Video and Image Processing
The LFE2-20E-5F672I is suitable for programmable video timing, pixel transport, image preprocessing, and test-pattern generation where parallel interfaces and configurable logic are required. Its 21K LUTs can combine timing controls with data-path logic, while embedded memory supports line buffers and short-frame storage. The 402-I/O capability can accommodate multi-bit pixel and synchronization channels, subject to the voltage standards and timing constraints of the selected package balls. The -5 speed grade helps accommodate pipelined datapaths, but image throughput depends on valid I/O allocation, memory bandwidth, and clock rate. Designers should use a reproducible video timing generator, constrain all pixel paths appropriately, and verify horizontal and vertical blanking behavior in hardware.
推薦
Communications Infrastructure
The LFE2-20E-5F672I can serve in line-card, baseband, and protocol-conversion systems that require programmable packet handling, parallel data movement, and multiple external interfaces. Its 21K LUTs, 282,624 embedded-memory bits, and DSP capability support pipelined datapaths, while 402 I/O support dense parallel connections. The industrial-temperature option and -5 speed grade suit equipment requiring predictable operation over a broader temperature range. A practical design should separate clock domains, constrain switch fabric paths, and reserve configuration and test access. High-speed serial interfaces require the manufacturer’s supported transceiver resources and correct reference-clock arrangement. Power integrity and thermal performance should be evaluated with actual I/O activity because dense simultaneous switching can materially affect the device’s operating behavior.
推薦
Instrumentation and Test Equipment
The LFE2-20E-5F672I can implement timing, sequence, acquisition-control, and pattern-generation logic in modular instrumentation. Its 21K LUTs support multiple concurrent channels, 402 I/O support dense analog and digital control connections, and embedded memory can hold acquisition tables or calibration sequences. The -5 speed grade is useful for short deterministic timing paths, while DSP resources may perform filtering or correction alongside control functions. Designers should partition acquisition, trigger, and communication logic carefully, then use dedicated clocking to keep instrumentation timing coherent. External converters and transceivers must be matched to the FPGA’s supported I/O standards and voltage levels. Timing analysis should include probe loading, trigger latency, and worst-case clock uncertainty rather than only nominal logic delay.
推薦
推薦產品摘要
工程參考資料，適用於 LFE2-20E-5F672I — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | LFE2-20SE-5FN672I | LFE2-20E-5FN672I | LFE2-20E-6FN672C | LFE2-20E-4FN672C | LFE2-20E-5F672C |
|---|---|---|---|---|---|---|
| Brand | Lattice Semiconductor | Lattice Semiconductor | Lattice Semiconductor | Lattice Semiconductor | Lattice Semiconductor | Lattice Semiconductor |
| Package | 672-pin FBGA | FPBGA-672 | FPBGA-672 | FPBGA-672 | FPBGA-672 | 672-pin FBGA |
| FPGA Family | ECP2 E-Series | ECP2 S-Series | ECP2 E-Series | ECP2 E-Series | ECP2 E-Series | ECP2 E-Series |
| Lookup Tables | 21K LUTs | 21K LUTs | 21K LUTs | 21K LUTs | 21K LUTs | 21K LUTs |
| User I/O | 402 I/O | 402 I/O | 402 I/O | 402 I/O | 402 I/O | 402 I/O |
| Core Supply Voltage | 1.2 V | 1.2 V | 1.2 V | 1.2 V | 1.2 V | 1.2 V |
| Speed Grade | -5 | -5 | -5 | -6 | -4 | -5 |
| Temperature Grade | Industrial | Industrial | Industrial | Commercial | Commercial | Commercial |
主要差異化特點
- Exact speed-grade alignment (對比LFE2-20E-6FN672C)
- Industrial-temperature configuration (對比LFE2-20E-6FN672C)
- Same resource and I/O density (對比LFE2-20SE-5FN672I)
設計說明
Implement the 1.2 V core and all auxiliary rails exactly as described in the ECP2 power-supply section. Place the prescribed high-frequency capacitors directly at the relevant FBGA supply balls, use multiple vias for each connection, and provide low-impedance planes beneath the device. Separate noisy external circuits from the FPGA supply network. Estimated: when a regulator efficiency is known, multiply the calculated core and I/O power by the inverse of that efficiency to estimate total input power; do not treat this estimate as a datasheet maximum.
A 672-ball FBGA requires disciplined escape routing, especially for clocks and high-speed interfaces. Follow the manufacturer reference layout for ball assignments, via arrays, plane shapes, and decoupling. Keep configuration signals away from high-speed data where practical, provide accessible test points, and maintain continuous ground references beneath routed layers. Validate the escape pattern against the PCB fabricator’s fine-pitch BGA capability before releasing artwork.
Do not treat two devices with the same LUT count and FBGA outline as automatically interchangeable. Verify the exact ball map, power rails, configuration interface, supported I/O standards, speed grade, temperature range, and bitstream support. The LFE2-20SE-5FN672I is presented as a complete replacement, but its S-Series feature set still requires design-level review. Document any substitution and rerun pinout, timing, power, and configuration checks.
Constrain all device clocks with realistic uncertainty and drive them through the manufacturer’s recommended clock-capable pins where applicable. Use source-synchronous or board-specific constraints for parallel interfaces, keep I/O voltage references clean, and examine series termination, loading, and return-path discontinuities. The -5 speed grade does not guarantee signal integrity; successful operation still depends on layout, power quality, external devices, and the target data rate.
Estimate worst-case power from the design’s clock activity, I/O toggling, RAM usage, and DSP loading rather than from a single nominal operating point. Then compare junction temperature with the device limit under the highest ambient temperature and worst PCB airflow condition. Use spread copper, thermal vias, and internal plane layers to spread heat from the large FBGA. Estimated: total dissipation equals core power plus auxiliary and I/O power; any resulting temperature-rise calculation must use the package thermal model for the actual PCB.
合規資訊
The available product listings do not provide explicit RoHS, REACH, lead-free, halogen-free, or conflict-minerals declarations. Automotive qualification is not established for this industrial-temperature FPGA option.