EP2C20F256I8 - Cyclone II FPGA 18,752 LE, 256-BGA | Altera
MPN： EP2C20F256I8 ✓ 啟用中EP2C20F256I8 概覽
An FPGA is an integrated circuit whose logic fabric is configured after manufacturing by loading a configuration bitstream. Instead of executing sequential software, it creates parallel hardware datapaths: designers write HDL, synthesize logic into logic elements, routing and I/O blocks, and configure the device in-system. Cyclone II FPGAs are SRAM-based, so they are volatile and need to reload their bitstream at power-up from flash, a host processor, or an Altera configuration device. In product hierarchy, this part is an FPGA -> SRAM-based FPGA -> mid-range Cyclone II -> Altera programmable logic family.
Headline features include 18,752 logic elements, 239,616 RAM bits, and 152 user I/O pins. The 1.2 V core logic family is CMOS, and the 256-ball BGA has a moderate footprint that suits parallel bus designs and controlled-impedance board layouts. The industrial-temperature suffix widens the allowable ambient operating range compared with commercial C-grade siblings. The device supports JTAG and active/passive serial configuration modes, allowing flexible factory programming and in-field updates.
Architecturally, Cyclone II places logic in logic array blocks together with embedded memory blocks, and connects the fabric through programmable routing to I/O banks. The 90 nm low-cost process balances density, power, and unit price for cost-sensitive systems. Since Cyclone II is SRAM-based, the non-volatile configuration solution must be selected early; typical choices include an EPC-series configuration device or a host microcontroller that loads the .rbf/.pof image at power-on.
Typical applications include industrial control and motor-drive interfaces, communication bridging, video/image preprocessing, test instrumentation, and IoT edge gateways. The 152 I/O pins give designers enough flexibility to connect memories, ADCs, DACs, transceivers, and human-machine-interface peripherals. The 239,616 RAM bits are useful for FIFOs, small line buffers, and coefficient tables, reducing the need for external SRAM in moderate-size designs.
Designers should decouple the 1.2 V core rail thoroughly and follow Altera Cyclone II board-layout guidance for the F256 BGA. Because exact current and thermal figures were not included in the fetched distributor data, use the official Cyclone II power calculator and the device handbook to size regulators and heatsinking before production.
This page adds distributor context, ordering-code alternatives, and practical design guidance beyond the bare datasheet, helping engineers complete sourcing and design triage more quickly.
直接替換替代品，適用於 EP2C20F256I8 — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： EP2C20F256I8 （相同外形與佔位） — 差異在於 Package, Process Technology, Total RAM Bits, Speed Grade, Embedded Multipliers (18x18).
EP2C20F256I8N
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →EP2C20F256C8N
✅ 直接替換聯絡詢價
查看資料表 →EP2C20F256C8
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →EP2C20F256C7N
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →EP2C20F256C6N
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →EP2C20F256I8 最大額定值與電氣特性
| FPGA Family | Cyclone II |
| Number of Logic Elements | 18752 LE |
| Total RAM Bits | 239616 bits |
| Number of User I/O | 152 |
| Package Type | 256-LBGA (FBGA-256) |
| 腳位數 | 256 |
| Core Supply Voltage | 1.2 V |
| Logic Family | CMOS |
| Process Technology | 90 nm CMOS |
| Speed Grade | 8 |
| Temperature Grade | Industrial (I) |
| Configuration Memory | SRAM-based |
| 安裝方式 | Surface Mount |
| Terminal Form | BALL |
EP2C20F256I8 256-lbga (fbga-256) 腳位配置指南
EP2C20F256I8（256-lbga (fbga-256) 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。
無詳細腳位定義資料： EP2C20F256I8.
請參閱 資料表 以查看完整腳位配置。
典型應用
EP2C20F256I8 適用於 6 應用s: Industrial Automation and Motor Control, Communication and Protocol Bridging, Video and Image Preprocessing, Test and Measurement Instrumentation, IoT and Edge Gateway Logic, Robotics and Motion Control.
Industrial Automation and Motor Control
The EP2C20F256I8 fits industrial automation because its industrial-temperature suffix is intended for factory-floor and outdoor-unconditioned equipment. Its 18,752 logic elements can implement encoder decoding, PWM generation, cascaded PID loops, and fieldbus bridging, while 239,616 RAM bits provide small queue and coefficient storage. The 152 user I/O pins connect to position sensors, current-sense ADCs, gate-driver inputs, and isolated UART/RS-485 transceivers. In motor-drive applications the FPGA is often placed between a host MCU and power-stage gate drivers, performing real-time commutation and fault handling in parallel hardware. If the final system must operate above or below the commercial temperature envelope, this industrial part provides a useful ordering-code margin for the programmable logic itself. The FPGA should be powered from a clean 1.2 V rail and configured from a non-volatile memory at every power-up.
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Communication and Protocol Bridging
EP2C20F256I8 is well suited for communication bridging because its parallel fabric can simultaneously handle multiple serial protocols and data reformatting engines. The 18,752 logic elements are sufficient for UART-to-SPI, Ethernet framing assist, CAN message handling, or custom packet parsing, while 239,616 RAM bits provide FIFO and descriptor buffering between clock domains. The 152 user I/O support connections to PHYs, line transceivers, LVDS-style links, and memory interfaces. In a typical industrial gateway, the FPGA exchanges data with a host processor, performs protocol translation, and drives isolated fieldbus transceivers. Because the device is SRAM-based, a supervisor or external CPLD should sequence the configuration load and hold reset until the FPGA is operational. The industrial-temperature grade adds robustness for communications equipment in plant-floor or roadside cabinets.
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Video and Image Preprocessing
The EP2C20F256I8 supports video and image preprocessing because 239,616 RAM bits can implement line buffers and small frame stores, while the programmable logic performs pixel-level operations in parallel. Designers can synthesize Bayer-to-RGB conversion, color space correction, thresholding, edge detection, or simple convolution kernels inside the FPGA fabric. The 152 user I/O pins connect to CMOS image sensors, display drivers, and DDR/SDRAM controller chips when larger image storage is required. Because the industrial I8 variant is intended for harsher environments, it is suitable for outdoor surveillance cameras, machine-vision equipment, and kiosk displays. For high-resolution or high-frame-rate processing, confirm that the speed grade 8 timing model meets the pixel clock requirement; a faster grade such as 6 or 7 may be selected for more demanding systems.
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Test and Measurement Instrumentation
In test and measurement equipment, the EP2C20F256I8 can act as a flexible data-acquisition and sequencing engine. Its 152 user I/O pins connect to high-speed ADCs, DACs, comparators, and digital control buses, while the FPGA fabric implements timing generators, trigger logic, decimation filters, and data formatting without loading a host CPU. The 18,752 logic elements allow several acquisition channels and a small embedded state machine to run concurrently. The 239,616 RAM bits provide acquisition FIFOs and calibration tables. The industrial-temperature suffix is valuable for benchtop and rack instruments that may be operated in warm environments. Because measurement applications often require repeatable start-up, use the active or passive serial configuration mode with a dedicated configuration device to ensure the FPGA loads deterministic firmware before measurement begins.
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IoT and Edge Gateway Logic
The EP2C20F256I8 is useful in IoT and edge gateways for offloading deterministic I/O, sensor aggregation, and protocol framing from the main applications processor. Its compact 256-FBGA package and industrial-temperature ordering option make it practical for DIN-rail gateways, remote terminal units, and outdoor edge computers. The 18,752 logic elements can implement multiple UARTs, SPI controllers, I2C bridges, and simple Ethernet packet processing; the 239,616 RAM bits provide small packet buffers. The 152 I/O pins can connect to sensors, memory, and wireless module parallel interfaces. Since an FPGA introduces a separate firmware image, the gateway software must manage the configuration file, versioning, and fail-safe update procedure. The 1.2 V core should be supplied from a dedicated regulator with adequate decoupling for reliable field operation.
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Robotics and Motion Control
The EP2C20F256I8 is a solid fit for robotics and motion control because its programmable hardware can execute multiple joint-control loops, safety interlocks, and communication protocols in parallel. With 18,752 logic elements, a designer can implement step/direction generation, quadrature encoder decoding, torque loop math, and trajectory profile logic in the same FPGA. The 239,616 RAM bits provide lookup tables and command queues for smooth motion profiles. The 152 user I/O connect to servo drive interfaces, brake circuits, and feedback sensors. The industrial-temperature I8 ordering code is important in robot cabinets and moving machinery where ambient temperature can rise well above normal indoor levels. In deployment, ensure the FPGA configuration is reloaded after each power cycle and that safety-critical faults are handled by hardware logic independent of software.
推薦
推薦產品摘要
工程參考資料，適用於 EP2C20F256I8 — 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 | EP2C20F256I8N | EP2C20F256C8N | EP2C20F256C8 | EP2C20F256C7N | EP2C20F256C6N |
|---|---|---|---|---|---|---|
| Package | 256-LBGA (FBGA-256) | 256-LBGA (FBGA-256) | 256-LBGA (FBGA-256) | 256-LBGA (FBGA-256) | 256-LBGA (FBGA-256) | 256-LBGA (FBGA-256) |
| Brand | Altera | Altera | Altera | Altera | Altera | Altera |
| Number of Logic Elements | 18752 LE | 18752 LE | 18752 LE | 18752 LE | 18752 LE | 18752 LE |
| Total RAM Bits | 239616 bits | 239616 bits | 239616 bits | 239616 bits | 239616 bits | 239616 bits |
| Number of User I/O | 152 | 152 | 152 | 152 | 152 | 152 |
| Core Supply Voltage | 1.2 V | 1.2 V | 1.2 V | 1.2 V | 1.2 V | 1.2 V |
| Speed Grade | 8 | 8 | 8 | 8 | 7 | 6 |
| Temperature Grade | Industrial (I) | Industrial (I) | Commercial (C) | Commercial (C) | Commercial (C) | Commercial (C) |
主要差異化特點
- Industrial-temperature ordering code in the same 256-FBGA package (對比EP2C20F256C8N)
- Speed grade 8 is available in an industrial-temp ordering option (對比EP2C20F256C7N and EP2C20F256C6N)
- Direct lead-free sibling exists without changing electrical function (對比EP2C20F256I8N)
設計說明
EP2C20F256I8 uses a 1.2 V core supply. Use a dedicated low-noise regulator sized after reading the Cyclone II power calculator, and place 0.1 uF ceramic capacitors near every core supply pin with additional bulk capacitance on the power plane. Separate I/O bank supplies should be filtered and matched to the interface voltage standards. FPGAs draw configuration and dynamic current in bursts, so the power supply must maintain regulation during configuration startup. Follow the Cyclone II device handbook guidance for decoupling and power sequencing.
The 256-ball FBGA package requires careful fanout: route core and I/O supply balls to an internal power plane through short vias, and place decoupling capacitors on the opposite side of the BGA when possible. Maintain the differential or single-ended trace impedance required by the connected interfaces. A typical 4-layer or 6-layer stack is advisable for this pin count. Reference the Cyclone II pin tables and board-layout guidelines in the manufacturer handbook for exact pin assignments and recommended via patterns.
Cyclone II is SRAM-based and loses its configuration when power is removed. Do not assume the FPGA is ready immediately after power-up; hold downstream logic in reset until the configuration device has loaded the bitstream. If firmware must be updated in the field, verify the remote update controller and configuration device connection early in the design. Also remember that an industrial-temperature FPGA does not make the whole board industrial-grade; check surrounding components and power supply temperature ratings.
合規資訊
Fetched data did not explicitly state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict minerals status. Altera/Intel parts with an N suffix typically denote a lead-free finish; EP2C20F256I8 has no N suffix, so verify compliance markings and datasheet status before assembly.
