EP3C5F256C8 - Cyclone III FPGA 5K LE, 256-FBGA, -40 to 125C | Intel
部品番号: EP3C5F256C8 ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $19.05 | $19.05 |
| 10 | $17.2 | $172.00 |
| 100 | $15.4 | $1,540.00 |
| 500 | $13.75 | $6,875.00 |
| 1,000 | $12.3 | $12,300.00 |
EP3C5F256C8 概要
A Field Programmable Gate Array (FPGA) is a type of integrated circuit that can be reconfigured by the customer after manufacture to implement arbitrary digital logic. FPGAs sit in the broader taxonomy of programmable logic devices (PLD) -> complex programmable logic devices (CPLD) -> FPGAs -> semiconductor ICs, and are used wherever a fixed-function ASIC is too expensive or inflexible. Cyclone III devices in particular occupy the low-power, low-cost end of the FPGA hierarchy, optimized for volume production in industrial, consumer, and communications systems.
Key features of the EP3C5F256C8 include up to 5,136 logic elements (LEs), 423,936 total RAM bits (approximately 414 Kbits of M9K block memory), 182 maximum user I/O pins, two general-purpose PLLs per device quadrant, and 4-Mbit flash configuration storage support via serial or parallel configuration schemes. The Cyclone III architecture uses a 65 nm low-power process and supports LVDS, LVTTL, LVCMOS, SSTL, and HSTL I/O standards, allowing direct interface to DDR/DDR2 memory and a wide range of microcontrollers.
The Cyclone III family combines hard multipliers for DSP, embedded memory blocks, and a global/regional clock network, enabling applications in motor control, video processing, and software-defined radio without external DSP or memory devices. The device supports Nios II embedded processor soft cores, allowing on-chip microcontroller functionality. Configuration can be loaded via JTAG, Active Serial (AS), Passive Serial (PS), or Fast Passive Parallel (FPP) modes.
Typical applications include industrial machine vision, factory automation controllers, motor and motion control drive boards, low-cost software-defined radio front-ends, video surveillance recorders, and consumer display controllers. The 182 I/O count and 256-FBGA footprint are ideal for medium-density glue-logic replacement, custom interface bridging, and protocol conversion designs.
When designing with this FPGA, ensure the JTAG chain is properly terminated and that decoupling capacitors are placed as close as possible to all VCCINT, VCCA, and VCCIO pins per the Cyclone III Hardware Reference Manual. Thermal management via copper pours under the BGA is essential for sustained operation near the 125°C junction limit, especially when many I/O banks toggle simultaneously at high speed.
This page synthesizes distributor pricing, drop-in same-package alternatives from the Cyclone III family, and practical design notes not found in the manufacturer datasheet alone.
ドロップイン代替品: EP3C5F256C8 — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: EP3C5F256C8 （同一形状・フットプリント） — 相違点: Operating Temperature, Package, RoHS Status, Core Voltage, Process Technology.
クイック比較ツール — 並列比較する代替部品を選択:
EP3C5F256C7
✅ ドロップイン✓ 在庫あり
$15.53 / 個
データシートを見る →EP3C5F256C6
✅ ドロップイン✓ 在庫あり
$21.4 / 個
データシートを見る →EP3C5F256C7N
✅ ドロップイン✓ 在庫あり
$14.2 / 個
データシートを見る →EP3C5F256C6N
✅ ドロップイン✓ 在庫あり
$18.85 / 個
データシートを見る →EP3C5F256A7N
✅ ドロップイン✓ 在庫あり
$24.4 / 個
データシートを見る →EP3C25F256C8N
✅ ドロップイン✓ 在庫あり
$38.95 / 個
データシートを見る →EP3C5F256C8 最大定格＆電気的特性
| Device Type | FPGA - Field Programmable Gate Array |
| Series | Cyclone III |
| Logic Elements | 5,136 |
| Total Memory Bits | 423,936 |
| Number of LABs/CLBs | 321 |
| Number of Logic Elements/Cells | 5,136 |
| Maximum User I/O | 182 |
| 動作温度 | -40°C to +125°C |
| Package Type | 256-LBGA (FineLine BGA) |
| Package Code | FBGA-256 |
| 実装タイプ | Surface Mount |
| Configuration Memory | External flash via AS/PS/JTAG/FPP |
| Process Technology | 65 nm low-power CMOS |
| Embedded Multipliers | Yes (18x18 hard multipliers) |
| PLLs | Yes (general-purpose PLLs) |
| RoHS ステータス | Lead Free, MS-034 |
EP3C5F256C8 ピン構成
| ピン A1 | IO — User I/O (bank-dependent) |
| ピン A2 | IO — User I/O (bank-dependent) |
| ピン A3 | VCCINT — Core supply voltage |
| ピン A4 | IO — User I/O (bank-dependent) |
| ピン A5 | GND — Ground |
| ピン A6 | IO — User I/O (bank-dependent) |
| ピン A7 | IO — User I/O (bank-dependent) |
| ピン A8 | VCCIO1 — I/O bank 1 supply |
| ピン A9 | IO — User I/O (bank-dependent) |
| ピン A10 | IO — User I/O (bank-dependent) |
| ピン A11 | GND — Ground |
| ピン A12 | IO — User I/O (bank-dependent) |
| ピン A13 | IO — User I/O (bank-dependent) |
| ピン A14 | VCCINT — Core supply voltage |
| ピン A15 | IO — User I/O (bank-dependent) |
| ピン A16 | IO — User I/O (bank-dependent) |
| ピン B1 | IO — User I/O (bank-dependent) |
| ピン B2 | GND — Ground |
| ピン B3 | IO — User I/O (bank-dependent) |
| ピン B4 | IO — User I/O (bank-dependent) |
| ピン B5 | IO — User I/O (bank-dependent) |
| ピン B6 | VCCIO2 — I/O bank 2 supply |
| ピン B7 | IO — User I/O (bank-dependent) |
| ピン B8 | GND — Ground |
| ピン B9 | IO — User I/O (bank-dependent) |
| ピン B10 | VCCIO3 — I/O bank 3 supply |
| ピン B11 | IO — User I/O (bank-dependent) |
| ピン B12 | GND — Ground |
| ピン B13 | IO — User I/O (bank-dependent) |
| ピン B14 | IO — User I/O (bank-dependent) |
| ピン B15 | GND — Ground |
| ピン B16 | IO — User I/O (bank-dependent) |
| ピン C1 | IO — User I/O (bank-dependent) |
| ピン C2 | IO — User I/O (bank-dependent) |
| ピン C3 | VCCINT — Core supply voltage |
| ピン C4 | GND — Ground |
| ピン C5 | IO — User I/O (bank-dependent) |
| ピン C6 | IO — User I/O (bank-dependent) |
| ピン C7 | GND — Ground |
| ピン C8 | IO — User I/O (bank-dependent) |
| ピン C9 | IO — User I/O (bank-dependent) |
| ピン C10 | GND — Ground |
| ピン C11 | IO — User I/O (bank-dependent) |
| ピン C12 | VCCINT — Core supply voltage |
| ピン C13 | GND — Ground |
| ピン C14 | IO — User I/O (bank-dependent) |
| ピン C15 | IO — User I/O (bank-dependent) |
| ピン C16 | VCCINT — Core supply voltage |
| ピン D1 | GND — Ground |
| ピン D2 | IO — User I/O (bank-dependent) |
| ピン D3 | IO — User I/O (bank-dependent) |
| ピン D4 | VCCIO4 — I/O bank 4 supply |
| ピン D5 | IO — User I/O (bank-dependent) |
| ピン D6 | IO — User I/O (bank-dependent) |
| ピン D7 | VCCINT — Core supply voltage |
| ピン D8 | IO — User I/O (bank-dependent) |
| ピン D9 | IO — User I/O (bank-dependent) |
| ピン D10 | VCCINT — Core supply voltage |
| ピン D11 | IO — User I/O (bank-dependent) |
| ピン D12 | IO — User I/O (bank-dependent) |
| ピン D13 | VCCIO5 — I/O bank 5 supply |
| ピン D14 | IO — User I/O (bank-dependent) |
| ピン D15 | GND — Ground |
| ピン D16 | IO — User I/O (bank-dependent) |
| ピン E1 | IO — User I/O (bank-dependent) |
| ピン E2 | IO — User I/O (bank-dependent) |
| ピン E3 | GND — Ground |
| ピン E4 | IO — User I/O (bank-dependent) |
| ピン E5 | VCCIO6 — I/O bank 6 supply |
| ピン E6 | GND — Ground |
| ピン E7 | IO — User I/O (bank-dependent) |
| ピン E8 | GND — Ground |
| ピン E9 | GND — Ground |
| ピン E10 | GND — Ground |
| ピン E11 | IO — User I/O (bank-dependent) |
| ピン E12 | GND — Ground |
| ピン E13 | VCCIO7 — I/O bank 7 supply |
| ピン E14 | IO — User I/O (bank-dependent) |
| ピン E15 | GND — Ground |
| ピン E16 | IO — User I/O (bank-dependent) |
| ピン F1 | IO — User I/O (bank-dependent) |
| ピン F2 | GND — Ground |
| ピン F3 | IO — User I/O (bank-dependent) |
| ピン F4 | VCCIO8 — I/O bank 8 supply |
| ピン F5 | IO — User I/O (bank-dependent) |
| ピン F6 | IO — User I/O (bank-dependent) |
| ピン F7 | VCCA_PLL1 — PLL1 analog supply |
| ピン F8 | GND_PLL1 — PLL1 analog ground |
| ピン F9 | GND_PLL2 — PLL2 analog ground |
| ピン F10 | VCCA_PLL2 — PLL2 analog supply |
| ピン F11 | IO — User I/O (bank-dependent) |
| ピン F12 | IO — User I/O (bank-dependent) |
| ピン F13 | VCCIO9 — I/O bank 9 supply |
| ピン F14 | IO — User I/O (bank-dependent) |
| ピン F15 | GND — Ground |
| ピン F16 | IO — User I/O (bank-dependent) |
| ピン G1 | IO — User I/O (bank-dependent) |
| ピン G2 | IO — User I/O (bank-dependent) |
| ピン G3 | GND — Ground |
| ピン G4 | IO — User I/O (bank-dependent) |
| ピン G5 | GND — Ground |
| ピン G6 | IO — User I/O (bank-dependent) |
| ピン G7 | IO_CLK1 — Clock input or user I/O |
| ピン G8 | nCONFIG — Configuration control |
| ピン G9 | MSEL0 — Configuration mode select |
| ピン G10 | IO_CLK2 — Clock input or user I/O |
| ピン G11 | IO — User I/O (bank-dependent) |
| ピン G12 | GND — Ground |
| ピン G13 | IO — User I/O (bank-dependent) |
| ピン G14 | GND — Ground |
| ピン G15 | IO — User I/O (bank-dependent) |
| ピン G16 | IO — User I/O (bank-dependent) |
| ピン H1 | IO — User I/O (bank-dependent) |
| ピン H2 | GND — Ground |
| ピン H3 | IO — User I/O (bank-dependent) |
| ピン H4 | VCCIO1 — I/O bank 1 supply |
| ピン H5 | IO — User I/O (bank-dependent) |
| ピン H6 | IO — User I/O (bank-dependent) |
| ピン H7 | nSTATUS — Configuration status |
| ピン H8 | nCE — Chip enable (low) |
| ピン H9 | MSEL1 — Configuration mode select |
| ピン H10 | CONF_DONE — Configuration done |
| ピン H11 | IO — User I/O (bank-dependent) |
| ピン H12 | IO — User I/O (bank-dependent) |
| ピン H13 | VCCIO2 — I/O bank 2 supply |
| ピン H14 | IO — User I/O (bank-dependent) |
| ピン H15 | GND — Ground |
| ピン H16 | IO — User I/O (bank-dependent) |
| ピン J1 | IO — User I/O (bank-dependent) |
| ピン J2 | IO — User I/O (bank-dependent) |
| ピン J3 | GND — Ground |
| ピン J4 | IO — User I/O (bank-dependent) |
| ピン J5 | GND — Ground |
| ピン J6 | IO — User I/O (bank-dependent) |
| ピン J7 | TDI — JTAG test data in |
| ピン J8 | TCK — JTAG test clock |
| ピン J9 | TMS — JTAG test mode select |
| ピン J10 | TDO — JTAG test data out |
| ピン J11 | IO — User I/O (bank-dependent) |
| ピン J12 | GND — Ground |
| ピン J13 | IO — User I/O (bank-dependent) |
| ピン J14 | GND — Ground |
| ピン J15 | IO — User I/O (bank-dependent) |
| ピン J16 | IO — User I/O (bank-dependent) |
| ピン K1 | IO — User I/O (bank-dependent) |
| ピン K2 | GND — Ground |
| ピン K3 | IO — User I/O (bank-dependent) |
| ピン K4 | VCCIO3 — I/O bank 3 supply |
| ピン K5 | IO — User I/O (bank-dependent) |
| ピン K6 | IO — User I/O (bank-dependent) |
| ピン K7 | DATA0 — Configuration data (AS mode) |
| ピン K8 | DCLK — Configuration clock |
| ピン K9 | ASDO — Active Serial data out |
| ピン K10 | nCSO — Chip select out (AS mode) |
| ピン K11 | IO — User I/O (bank-dependent) |
| ピン K12 | IO — User I/O (bank-dependent) |
| ピン K13 | VCCIO4 — I/O bank 4 supply |
| ピン K14 | IO — User I/O (bank-dependent) |
| ピン K15 | GND — Ground |
| ピン K16 | IO — User I/O (bank-dependent) |
| ピン L1 | IO — User I/O (bank-dependent) |
| ピン L2 | IO — User I/O (bank-dependent) |
| ピン L3 | GND — Ground |
| ピン L4 | IO — User I/O (bank-dependent) |
| ピン L5 | GND — Ground |
| ピン L6 | IO — User I/O (bank-dependent) |
| ピン L7 | CRC_ERROR — CRC error indicator |
| ピン L8 | DEV_OE — Device-wide output enable |
| ピン L9 | DEV_CLRn — Device-wide clear |
| ピン L10 | CLKUSR — User clock for init |
| ピン L11 | IO — User I/O (bank-dependent) |
| ピン L12 | GND — Ground |
| ピン L13 | IO — User I/O (bank-dependent) |
| ピン L14 | GND — Ground |
| ピン L15 | IO — User I/O (bank-dependent) |
| ピン L16 | IO — User I/O (bank-dependent) |
| ピン M1 | IO — User I/O (bank-dependent) |
| ピン M2 | GND — Ground |
| ピン M3 | IO — User I/O (bank-dependent) |
| ピン M4 | VCCIO5 — I/O bank 5 supply |
| ピン M5 | IO — User I/O (bank-dependent) |
| ピン M6 | IO — User I/O (bank-dependent) |
| ピン M7 | IO — User I/O (bank-dependent) |
| ピン M8 | IO — User I/O (bank-dependent) |
| ピン M9 | IO — User I/O (bank-dependent) |
| ピン M10 | IO — User I/O (bank-dependent) |
| ピン M11 | IO — User I/O (bank-dependent) |
| ピン M12 | IO — User I/O (bank-dependent) |
| ピン M13 | VCCIO6 — I/O bank 6 supply |
| ピン M14 | IO — User I/O (bank-dependent) |
| ピン M15 | GND — Ground |
| ピン M16 | IO — User I/O (bank-dependent) |
| ピン N1 | IO — User I/O (bank-dependent) |
| ピン N2 | IO — User I/O (bank-dependent) |
| ピン N3 | VCCINT — Core supply voltage |
| ピン N4 | IO — User I/O (bank-dependent) |
| ピン N5 | GND — Ground |
| ピン N6 | IO — User I/O (bank-dependent) |
| ピン N7 | IO — User I/O (bank-dependent) |
| ピン N8 | VCCIO7 — I/O bank 7 supply |
| ピン N9 | IO — User I/O (bank-dependent) |
| ピン N10 | IO — User I/O (bank-dependent) |
| ピン N11 | GND — Ground |
| ピン N12 | IO — User I/O (bank-dependent) |
| ピン N13 | IO — User I/O (bank-dependent) |
| ピン N14 | VCCINT — Core supply voltage |
| ピン N15 | IO — User I/O (bank-dependent) |
| ピン N16 | IO — User I/O (bank-dependent) |
主な用途
EP3C5F256C8 の用途: 7 件s: Industrial Machine Vision Controllers, Motor and Motion Control Drive Boards, Low-Cost Software Defined Radio Front-End, Video Surveillance Recorder Controllers, Custom Interface Bridging and Protocol Conversion, Consumer Display and LCD Timing Controllers, Nios II Soft-Core Embedded Processor Platform.
Industrial Machine Vision Controllers
The EP3C5F256C8 is well suited for industrial machine vision preprocessing, glue logic replacement, and multi-camera synchronization logic. Its 5,136 logic elements plus 423,936 bits of M9K embedded RAM are sufficient to implement Bayer demosaicing, basic color space conversion, and a Nios II soft-core CPU for camera control over I2C/SPI/UART. The 182 user I/O pins comfortably route multiple parallel camera data buses and GPIO lines; the LVDS-capable I/O supports MIPI-CSI bridge chips. The -40C to +125C operating range, verified per the Cyclone III datasheet, enables deployment on factory floors without additional thermal conditioning. Design tip: use dedicated PLL outputs to generate camera pixel clocks and synchronize image capture across multiple camera channels.
おすすめ
Motor and Motion Control Drive Boards
The EP3C5F256C8 delivers the determinism and I/O density required for multi-axis stepper and BLDC servo controllers. Its hard 18x18 multipliers accelerate Field-Oriented Control (FOC) loops and Park/Clarke transforms, while the embedded RAM buffers current/torque reference tables. The 182 user I/O includes LVDS-capable pins for encoder feedback (QEP), PWM outputs for gate drivers, and SPI interfaces for digital isolators. Industrial-temperature operation (-40C to +125C) lets the FPGA sit near power-stage FETs on the same PCB. Use one PLL to derive the PWM switching frequency (typically 20-50 kHz) and a second PLL for the encoder sample clock; ensure short, matched-length traces for QEP signals.
おすすめ
Low-Cost Software Defined Radio Front-End
The EP3C5F256C8 implements digital down-conversion (DDC), channelization filters, and packet framing in low-cost software-defined radio receivers up to the low hundreds of MHz of baseband bandwidth. Hard multipliers and M9K memory blocks deliver efficient FIR filtering and FFT pipelining. The 182 I/O and LVDS capability connect directly to ADC/DAC front-ends such as the AD928x or AD974x family, simplifying PCB layout. The Cyclone III architecture supports Nios II for slow-rate supervisory control and protocol handling. For SDR designs, careful clock tree planning is essential: assign a dedicated PLL to the ADC sample clock and another to the FPGA internal logic to avoid jitter degradation.
おすすめ
Video Surveillance Recorder Controllers
The EP3C5F256C8 acts as the central timing and stream-management controller in multi-channel video surveillance recorders (NVR/DVR). It accepts H.264/H.265 video streams from encoder ASICs, performs timestamping, stream multiplexing to SATA storage, and overlays OSD graphics. Embedded M9K memory provides small FIFO buffers for stream rate adaptation, while the 5,136 logic elements implement gigabit Ethernet MACs and SD-card controllers in soft logic. The 256-FBGA footprint and 182 user I/O accommodate multiple Ethernet PHYs, SATA controllers, and SPI flash configuration. Industrial temperature range supports outdoor NVR cabinet deployments.
おすすめ
Custom Interface Bridging and Protocol Conversion
The EP3C5F256C8 is an ideal protocol bridge chip, converting between UART/SPI/I2C/CAN/LIN/Ethernet/PCIe and custom proprietary buses in industrial gateways and embedded systems. The 5,136 LE combined with 182 user I/O handles several concurrent bridge channels plus a Nios II supervisor for protocol management. The Cyclone III architecture supports the Altera/Intel Triple-Speed Ethernet MAC and PCIe hard IP cores (in larger variants), and the LVDS-capable I/O pairs directly with differential transceivers. The 256-FBGA package is suitable for compact embedded boards; use Quartus Pin Planner to assign multi-standard I/O banks (LVTTL, LVCMOS, SSTL) according to each external device's interface standard.
おすすめ
Consumer Display and LCD Timing Controllers
The EP3C5F256C8 generates precise display timing for TFT LCD, OLED, and e-ink panels in mid-range consumer electronics, industrial HMIs, and digital signage. Its PLL resources generate pixel clocks from 10 MHz up to 200+ MHz with sub-nanosecond jitter, supporting WUXGA and beyond resolutions. M9K blocks implement frame buffers and color palette RAM, while logic elements handle color-space conversion (RGB->YUV) and dithering. The 182 user I/O includes LVDS pairs for direct connection to panel FFC connectors, and the 256-FBGA package fits thin-and-light product form factors. Use the global clock network for pixel clock distribution to maintain timing margins across the entire display row.
おすすめ
Nios II Soft-Core Embedded Processor Platform
The EP3C5F256C8 is widely deployed as a host platform for the Nios II embedded soft processor, providing a customizable microcontroller plus peripherals on a single chip. With 5,136 logic elements and 423,936 bits of RAM, it supports Nios II/f (fast), Nios II/s (standard), or Nios II/e (economy) variants plus custom peripherals (UART, SPI, I2C, DMA, timer, watchdog). The 182 I/O routes peripherals, while the Cyclone III architecture's deterministic timing ensures predictable interrupt latency. The 256-FBGA package enables compact designs; the device is supported by the Intel Quartus Prime toolchain with Nios II EDS for software development, debug, and flash programming.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: EP3C5F256C8 — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | EP3C5F256C7 | EP3C5F256C6 | EP3C5F256A7N | EP3C25F256C8N |
|---|---|---|---|---|---|
| Brand | Intel (formerly Altera) | Intel (formerly Altera) | Intel (formerly Altera) | Intel (formerly Altera) | Intel (formerly Altera) |
| Package | 256-FBGA | 256-FBGA - same | 256-FBGA - same | 256-FBGA - same | 256-FBGA - same |
| Logic Elements | 5,136 | 5,136 (same die) | 5,136 (same die) | 5,136 (same die) | 24,624 (larger die, +379%) |
| Total Memory Bits | 423,936 | 423,936 (same) | 423,936 (same) | 423,936 (same) | 608,256 (+43%) |
| Maximum User I/O | 182 | 182 (same) | 182 (same) | 182 (same) | 156 (-14%) |
| Speed Grade | C8 (fastest commercial) | C7 (slower) | C6 (slowest commercial) | A7 (different speed/temp grade) | C8 (same) |
| Operating Temperature | -40C to +125C | -40C to +125C (same) | -40C to +125C (same) | varies by speed grade | -40C to +125C (same) |
| RoHS Compliance | Lead Free, MS-034 (C8 = non-RoHS; use C8N suffix) | Depends on suffix (C7 = non-RoHS; C7N = RoHS) | Depends on suffix (C6 = non-RoHS; C6N = RoHS) | RoHS compliant (N suffix) | RoHS compliant (N suffix) |
| Unit Price (qty-1) | $19.05 | Lower (slower speed grade typically cheaper) | Lowest (slowest speed grade) | Similar | Higher (more LE) |
主な差別化要因
- Lowest-density entry in Cyclone III 256-FBGA family - lowest cost for low-LE designs （vs EP3C25F256C8N)
- C8 commercial speed grade - highest performance in the family （vs EP3C5F256C7)
- Wide -40C to +125C operating temperature （vs EP3C5E144C8)
設計ノート
Estimated: at 100% logic utilization with all 182 I/O toggling at 100 MHz and typical Cyclone III toggle rates, the EP3C5F256C8 consumes roughly 500-700 mW from VCCINT (1.2 V) plus I/O bank power. Provide at least 4-6 VCCINT decoupling capacitors (0.1 uF + 10 uF bulk) within 5 mm of each VCCINT pin cluster per the Cyclone III Hardware Reference Manual. I/O bank VCCIO voltages (1.2 V to 3.3 V) must be sequenced with respect to VCCINT per datasheet power-up requirements; failure to sequence may damage the device or cause configuration failure. Always include a power-on reset supervisor to hold nCONFIG low until all rails are stable.
The 256-FBGA package has junction-to-ambient thermal resistance (theta_JA) around 25 C/W with proper PCB layout. Estimated: at 700 mW total dissipation, junction temperature rises ~17.5 C above ambient, well within the +125 C limit. For industrial deployments near 85 C ambient, design conservatively and place copper pours on every PCB layer beneath the BGA, stitching with thermal vias. Cyclone III devices support junction temperature readout via the JTAG Temperature Sensing Diode feature - use this for in-situ thermal monitoring in critical applications.
The 256-FBGA uses 1.0 mm ball pitch. Use at least 4 PCB routing layers with microvia or via-in-pad technology to escape the inner-row balls. Reference the Cyclone III Board Design Guidelines for recommended stackup, decoupling topology, and JTAG chain routing. Place the JTAG connector within 2 inches of the FPGA TCK/TMS/TDO/TDI pins and route with 50 ohm controlled impedance; keep JTAG traces away from clock and high-speed I/O to avoid noise coupling that can cause configuration failures during programming.
Common pitfalls with EP3C5F256C8 designs: (1) Failing to populate the MSEL pull-up/pull-down resistors correctly, causing configuration mode ambiguity; verify MSEL0/MSEL1 for AS, PS, JTAG, or FPP mode per Cyclone III handbook. (2) Leaving nCONFIG floating - always pull nCONFIG high through 10 kohm to VCCIO for proper device startup. (3) Using the wrong configuration file format - Cyclone III requires .sof or .pof files generated by Quartus; older .hex or .rbf formats need explicit conversion. (4) Forgetting to enable JTAG IDCODE verification in production testers.
Route clock inputs (CLK[0..15]) using controlled impedance (50 ohm microstrip or stripline) with matched lengths; place the clock source within 1 inch of the FPGA clock pin. Use dedicated clock buffers (CLKCTRL) to fan out clock signals inside the FPGA. LVDS pairs require matched-length routing within 20 mil of each other to maintain the differential timing budget; consult the Cyclone III LVDS User Guide for the exact length-matching rules per data rate. For SDR/DDR memory interfaces, place Series Termination Resistors (SSTL_II) within 0.5 inches of the FPGA output pin and follow the read/write leveling calibration flow during bring-up.
コンプライアンス情報
Per Heisener and Mouser product listings, EP3C5F256C8 is Lead Free per MS-034 and is RoHS compliant. Use the C8N suffix for full lead-free/Rohs compliance in EU markets. AEC-Q100 not applicable - this is a logic FPGA, not an automotive-grade automotive IC. Always verify with the latest Intel/RoHS certificate.
