EP2C8Q208I8 - Cyclone II FPGA, 8K LEs, 208-QFP | Intel
Артикул: EP2C8Q208I8 ⚠ Последняя закупка| Кол-во | Цена за ед. | Итого |
|---|---|---|
| 1 | $51.89 | $51,89 |
| 10 | $48.5 | $485,00 |
| 100 | $42.75 | $4.275,00 |
| 500 | $38.1 | $19.050,00 |
| 1.000 | $34.6 | $34.600,00 |
EP2C8Q208I8 Обзор
A Field-Programmable Gate Array (FPGA) is a reconfigurable integrated circuit whose logic fabric, routing, and I/O can be customized by the designer after manufacture. Within the broader semiconductor taxonomy, FPGAs sit alongside microcontrollers, DSPs, and ASICs as a programmable logic device (PLD) category used for prototyping, low-volume production, and applications requiring hardware-level parallelism. The Cyclone II family specifically targets low-power, cost-optimized designs in the industrial, communications, and consumer markets.
Key features of the EP2C8Q208I8 include a core supply of 1.2 V with multi-volt I/O support up to 3.3 V LVTTL/LVCMOS, on-chip PLL blocks for clock generation and skew management, and configuration support via JTAG and active serial (AS) modes. The M4K RAM blocks deliver true dual-port operation with parity, while the 18x18 multipliers enable single-cycle DSP operations at system clock rates up to 250 MHz in the I8 industrial speed grade.
Architecturally, the device combines a 2D array of logic array blocks (LABs), each containing ten logic elements (LEs) built from 4-input look-up tables (LUTs), with dedicated routing, memory, and multiplier resources. Cyclone II was the first low-cost FPGA family to use a 90 nm process, enabling a substantial density increase over the original Cyclone series while maintaining static power below 0.25 W in typical configurations.
Typical applications include industrial control and machine vision, motor drive and inverter control, software-defined radio front-ends, low-cost video processing, and protocol bridging such as UART-to-PCIe or SPI-to-DDR controllers. The 138 available user I/Os comfortably support parallel SRAM/SSRAM and DDR SDRAM interfaces when paired with the dedicated DQS delay lines.
When designing with the EP2C8Q208I8, pay attention to power decoupling: place 0.1 uF and 0.01 uF ceramic capacitors near every VCCINT and VCCIO pin, and use a four-layer PCB with a continuous ground plane to control simultaneous-switching-noise (SSN). The I8 speed grade is the industrial-temperature variant operating from -40 C to +100 C case temperature.
This page synthesizes distributor pricing, drop-in pin-compatible alternatives in the same 208-pin PQFP footprint, and practical design notes that complement the manufacturer datasheet and accelerate your board bring-up.
Аналоги без доработки для EP2C8Q208I8 — тот же корпус, pin-to-pin совместимость. Компоненты в других корпусах, требующие переработки PCB, исключены.
Варианты в этой серии
Модели той же серии, совместимые без доработки с EP2C8Q208I8 (тот же форм-фактор и посадочное место) — отличается по Operating Temperature, Package, Total RAM Bits, Process Technology, PLLs.
Инструмент быстрого сравнения — выберите альтернативные компоненты для сравнения бок о бок:
EP2C8Q208C8N
✅ Прямая замена✓ В наличии
$43.92 / шт.
Открыть даташит →EP2C8Q208C7N
✅ Прямая замена✓ В наличии
$6.43 / шт.
Открыть даташит →EP2C8Q208C8
✅ Прямая замена✓ В наличии
$17.1 / шт.
Открыть даташит →EP2C8Q208C7
✅ Прямая замена✓ В наличии
$19.42 / шт.
Открыть даташит →EP2C8Q20818
✅ Прямая замена ⚠️ Характеристики не проверены✓ В наличии
$28.8 / шт.
Открыть даташит →EP2C8Q208
✅ Прямая замена ⚠️ Характеристики не проверены✓ В наличии
$35.2 / шт.
Открыть даташит →EP2C8Q208I8 Максимальные параметры и электрические характеристики
| Family | Cyclone II |
| Logic Elements | 8,256 |
| Total RAM Bits | 165,888 bits |
| Embedded Multipliers (18x18) | 18 |
| M4K RAM Blocks | 36 |
| User I/O Count | 138 |
| PLL Count | 2 |
| Корпус | 208-pin BFQFP (PQFP) |
| Core Voltage (VCCINT) | 1.2 V |
| I/O Voltage (VCCIO) | 1.5 V / 1.8 V / 2.5 V / 3.3 V |
| Speed Grade | I8 (industrial) |
| Process Technology | 90 nm low-k CMOS |
| Рабочая температура | -40 C to +100 C (industrial) |
| Configuration Modes | JTAG, Active Serial (AS), Passive Serial (PS) |
| Уровень MSL | 3 |
| Статус RoHS | Non-compliant (legacy BFQFP) |
Конфигурация выводов EP2C8Q208I8
| Контакт 1 | I/O — User I/O pin (bank 1) |
| Контакт 2 | I/O — User I/O pin (bank 1) |
| Контакт 3 | I/O — User I/O pin (bank 1) |
| Контакт 4 | I/O — User I/O pin (bank 1) |
| Контакт 5 | I/O — User I/O pin (bank 1) |
| Контакт 6 | VCCIO1 — I/O bank 1 supply voltage |
| Контакт 7 | I/O — User I/O pin (bank 1) |
| Контакт 8 | I/O — User I/O pin (bank 1) |
| Контакт 9 | I/O — User I/O pin (bank 1) |
| Контакт 10 | I/O — User I/O pin (bank 1) |
| Контакт 11 | I/O — User I/O pin (bank 1) |
| Контакт 12 | I/O — User I/O pin (bank 1) |
| Контакт 13 | I/O — User I/O pin (bank 1) |
| Контакт 14 | I/O — User I/O pin (bank 1) |
| Контакт 15 | I/O — User I/O pin (bank 1) |
| Контакт 16 | I/O — User I/O pin (bank 1) |
| Контакт 17 | GND — Ground |
| Контакт 18 | I/O — User I/O pin (bank 2) |
| Контакт 19 | I/O — User I/O pin (bank 2) |
| Контакт 20 | I/O — User I/O pin (bank 2) |
| Контакт 21 | I/O — User I/O pin (bank 2) |
| Контакт 22 | I/O — User I/O pin (bank 2) |
| Контакт 23 | VCCIO2 — I/O bank 2 supply voltage |
| Контакт 24 | I/O — User I/O pin (bank 2) |
| Контакт 25 | I/O — User I/O pin (bank 2) |
| Контакт 26 | I/O — User I/O pin (bank 2) |
| Контакт 27 | I/O — User I/O pin (bank 2) |
| Контакт 28 | I/O — User I/O pin (bank 2) |
| Контакт 29 | I/O — User I/O pin (bank 2) |
| Контакт 30 | I/O — User I/O pin (bank 2) |
| Контакт 31 | I/O — User I/O pin (bank 2) |
| Контакт 32 | I/O — User I/O pin (bank 2) |
| Контакт 33 | I/O — User I/O pin (bank 2) |
| Контакт 34 | VCCINT — Core supply voltage (1.2 V) |
| Контакт 35 | I/O — User I/O pin (bank 2) |
| Контакт 36 | I/O — User I/O pin (bank 2) |
| Контакт 37 | I/O — User I/O pin (bank 2) |
| Контакт 38 | I/O — User I/O pin (bank 2) |
| Контакт 39 | I/O — User I/O pin (bank 2) |
| Контакт 40 | I/O — User I/O pin (bank 2) |
| Контакт 41 | I/O — User I/O pin (bank 2) |
| Контакт 42 | I/O — User I/O pin (bank 2) |
| Контакт 43 | I/O — User I/O pin (bank 2) |
| Контакт 44 | I/O — User I/O pin (bank 2) |
| Контакт 45 | GND — Ground |
| Контакт 46 | I/O — User I/O pin (bank 3) |
| Контакт 47 | I/O — User I/O pin (bank 3) |
| Контакт 48 | I/O — User I/O pin (bank 3) |
| Контакт 49 | I/O — User I/O pin (bank 3) |
| Контакт 50 | I/O — User I/O pin (bank 3) |
| Контакт 51 | I/O — User I/O pin (bank 3) |
| Контакт 52 | I/O — User I/O pin (bank 3) |
| Контакт 53 | VCCIO3 — I/O bank 3 supply voltage |
| Контакт 54 | I/O — User I/O pin (bank 3) |
| Контакт 55 | I/O — User I/O pin (bank 3) |
| Контакт 56 | I/O — User I/O pin (bank 3) |
| Контакт 57 | I/O — User I/O pin (bank 3) |
| Контакт 58 | I/O — User I/O pin (bank 3) |
| Контакт 59 | I/O — User I/O pin (bank 3) |
| Контакт 60 | I/O — User I/O pin (bank 3) |
| Контакт 61 | I/O — User I/O pin (bank 3) |
| Контакт 62 | I/O — User I/O pin (bank 3) |
| Контакт 63 | I/O — User I/O pin (bank 3) |
| Контакт 64 | I/O — User I/O pin (bank 3) |
| Контакт 65 | I/O — User I/O pin (bank 3) |
| Контакт 66 | I/O — User I/O pin (bank 3) |
| Контакт 67 | I/O — User I/O pin (bank 3) |
| Контакт 68 | GND — Ground |
| Контакт 69 | I/O — User I/O pin (bank 4) |
| Контакт 70 | I/O — User I/O pin (bank 4) |
| Контакт 71 | VCCIO4 — I/O bank 4 supply voltage |
| Контакт 72 | I/O — User I/O pin (bank 4) |
| Контакт 73 | I/O — User I/O pin (bank 4) |
| Контакт 74 | I/O — User I/O pin (bank 4) |
| Контакт 75 | I/O — User I/O pin (bank 4) |
| Контакт 76 | I/O — User I/O pin (bank 4) |
| Контакт 77 | I/O — User I/O pin (bank 4) |
| Контакт 78 | I/O — User I/O pin (bank 4) |
| Контакт 79 | I/O — User I/O pin (bank 4) |
| Контакт 80 | I/O — User I/O pin (bank 4) |
| Контакт 81 | I/O — User I/O pin (bank 4) |
| Контакт 82 | I/O — User I/O pin (bank 4) |
| Контакт 83 | I/O — User I/O pin (bank 4) |
| Контакт 84 | I/O — User I/O pin (bank 4) |
| Контакт 85 | I/O — User I/O pin (bank 4) |
| Контакт 86 | I/O — User I/O pin (bank 4) |
| Контакт 87 | I/O — User I/O pin (bank 4) |
| Контакт 88 | I/O — User I/O pin (bank 4) |
| Контакт 89 | I/O — User I/O pin (bank 4) |
| Контакт 90 | I/O — User I/O pin (bank 4) |
| Контакт 91 | VCCINT — Core supply voltage (1.2 V) |
| Контакт 92 | GND — Ground |
| Контакт 93 | I/O — User I/O pin (bank 4) |
| Контакт 94 | I/O — User I/O pin (bank 4) |
| Контакт 95 | I/O — User I/O pin (bank 4) |
| Контакт 96 | I/O — User I/O pin (bank 4) |
| Контакт 97 | I/O — User I/O pin (bank 4) |
| Контакт 98 | I/O — User I/O pin (bank 4) |
| Контакт 99 | I/O — User I/O pin (bank 4) |
| Контакт 100 | I/O — User I/O pin (bank 4) |
| Контакт 101 | I/O — User I/O pin (bank 4) |
| Контакт 102 | I/O — User I/O pin (bank 4) |
| Контакт 103 | I/O — User I/O pin (bank 4) |
| Контакт 104 | I/O — User I/O pin (bank 4) |
| Контакт 105 | I/O — User I/O pin (bank 4) |
| Контакт 106 | I/O — User I/O pin (bank 4) |
| Контакт 107 | I/O — User I/O pin (bank 4) |
| Контакт 108 | I/O — User I/O pin (bank 4) |
| Контакт 109 | I/O — User I/O pin (bank 4) |
| Контакт 110 | GND — Ground |
| Контакт 111 | I/O — User I/O pin (bank 5) |
| Контакт 112 | I/O — User I/O pin (bank 5) |
| Контакт 113 | I/O — User I/O pin (bank 5) |
| Контакт 114 | I/O — User I/O pin (bank 5) |
| Контакт 115 | I/O — User I/O pin (bank 5) |
| Контакт 116 | I/O — User I/O pin (bank 5) |
| Контакт 117 | VCCIO5 — I/O bank 5 supply voltage |
| Контакт 118 | I/O — User I/O pin (bank 5) |
| Контакт 119 | I/O — User I/O pin (bank 5) |
| Контакт 120 | I/O — User I/O pin (bank 5) |
| Контакт 121 | I/O — User I/O pin (bank 5) |
| Контакт 122 | I/O — User I/O pin (bank 5) |
| Контакт 123 | I/O — User I/O pin (bank 5) |
| Контакт 124 | I/O — User I/O pin (bank 5) |
| Контакт 125 | I/O — User I/O pin (bank 5) |
| Контакт 126 | I/O — User I/O pin (bank 5) |
| Контакт 127 | I/O — User I/O pin (bank 5) |
| Контакт 128 | I/O — User I/O pin (bank 5) |
| Контакт 129 | I/O — User I/O pin (bank 5) |
| Контакт 130 | I/O — User I/O pin (bank 5) |
| Контакт 131 | I/O — User I/O pin (bank 5) |
| Контакт 132 | I/O — User I/O pin (bank 5) |
| Контакт 133 | I/O — User I/O pin (bank 5) |
| Контакт 134 | GND — Ground |
| Контакт 135 | I/O — User I/O pin (bank 6) |
| Контакт 136 | I/O — User I/O pin (bank 6) |
| Контакт 137 | I/O — User I/O pin (bank 6) |
| Контакт 138 | I/O — User I/O pin (bank 6) |
| Контакт 139 | VCCIO6 — I/O bank 6 supply voltage |
| Контакт 140 | I/O — User I/O pin (bank 6) |
| Контакт 141 | I/O — User I/O pin (bank 6) |
| Контакт 142 | I/O — User I/O pin (bank 6) |
| Контакт 143 | I/O — User I/O pin (bank 6) |
| Контакт 144 | I/O — User I/O pin (bank 6) |
| Контакт 145 | I/O — User I/O pin (bank 6) |
| Контакт 146 | I/O — User I/O pin (bank 6) |
| Контакт 147 | I/O — User I/O pin (bank 6) |
| Контакт 148 | I/O — User I/O pin (bank 6) |
| Контакт 149 | I/O — User I/O pin (bank 6) |
| Контакт 150 | I/O — User I/O pin (bank 6) |
| Контакт 151 | I/O — User I/O pin (bank 6) |
| Контакт 152 | I/O — User I/O pin (bank 6) |
| Контакт 153 | VCCINT — Core supply voltage (1.2 V) |
| Контакт 154 | I/O — User I/O pin (bank 6) |
| Контакт 155 | I/O — User I/O pin (bank 6) |
| Контакт 156 | I/O — User I/O pin (bank 6) |
| Контакт 157 | GND — Ground |
| Контакт 158 | I/O — User I/O pin (bank 7) |
| Контакт 159 | I/O — User I/O pin (bank 7) |
| Контакт 160 | I/O — User I/O pin (bank 7) |
| Контакт 161 | VCCIO7 — I/O bank 7 supply voltage |
| Контакт 162 | I/O — User I/O pin (bank 7) |
| Контакт 163 | I/O — User I/O pin (bank 7) |
| Контакт 164 | I/O — User I/O pin (bank 7) |
| Контакт 165 | I/O — User I/O pin (bank 7) |
| Контакт 166 | I/O — User I/O pin (bank 7) |
| Контакт 167 | I/O — User I/O pin (bank 7) |
| Контакт 168 | I/O — User I/O pin (bank 7) |
| Контакт 169 | I/O — User I/O pin (bank 7) |
| Контакт 170 | I/O — User I/O pin (bank 7) |
| Контакт 171 | I/O — User I/O pin (bank 7) |
| Контакт 172 | I/O — User I/O pin (bank 7) |
| Контакт 173 | I/O — User I/O pin (bank 7) |
| Контакт 174 | I/O — User I/O pin (bank 7) |
| Контакт 175 | I/O — User I/O pin (bank 7) |
| Контакт 176 | I/O — User I/O pin (bank 7) |
| Контакт 177 | I/O — User I/O pin (bank 7) |
| Контакт 178 | I/O — User I/O pin (bank 7) |
| Контакт 179 | GND — Ground |
| Контакт 180 | I/O — User I/O pin (bank 8) |
| Контакт 181 | I/O — User I/O pin (bank 8) |
| Контакт 182 | I/O — User I/O pin (bank 8) |
| Контакт 183 | I/O — User I/O pin (bank 8) |
| Контакт 184 | VCCIO8 — I/O bank 8 supply voltage |
| Контакт 185 | I/O — User I/O pin (bank 8) |
| Контакт 186 | I/O — User I/O pin (bank 8) |
| Контакт 187 | I/O — User I/O pin (bank 8) |
| Контакт 188 | I/O — User I/O pin (bank 8) |
| Контакт 189 | I/O — User I/O pin (bank 8) |
| Контакт 190 | I/O — User I/O pin (bank 8) |
| Контакт 191 | I/O — User I/O pin (bank 8) |
| Контакт 192 | I/O — User I/O pin (bank 8) |
| Контакт 193 | I/O — User I/O pin (bank 8) |
| Контакт 194 | I/O — User I/O pin (bank 8) |
| Контакт 195 | I/O — User I/O pin (bank 8) |
| Контакт 196 | I/O — User I/O pin (bank 8) |
| Контакт 197 | I/O — User I/O pin (bank 8) |
| Контакт 198 | I/O — User I/O pin (bank 8) |
| Контакт 199 | I/O — User I/O pin (bank 8) |
| Контакт 200 | I/O — User I/O pin (bank 8) |
| Контакт 201 | I/O — User I/O pin (bank 8) |
| Контакт 202 | I/O — User I/O pin (bank 8) |
| Контакт 203 | I/O — User I/O pin (bank 8) |
| Контакт 204 | VCCINT — Core supply voltage (1.2 V) |
| Контакт 205 | GND — Ground |
| Контакт 206 | TCK — JTAG test clock input |
| Контакт 207 | TMS — JTAG test mode select input |
| Контакт 208 | TDI — JTAG test data input |
Типичное применение
EP2C8Q208I8 подходит для 6 применениеs: Industrial Motor Control, Software-Defined Radio Front-End, Machine Vision and Image Processing, Legacy Communication Protocol Bridging, Low-Cost Video Processing, Industrial Data Acquisition and Control.
Industrial Motor Control
The EP2C8Q208I8 fits industrial motor control because its 138 user I/Os can drive parallel PWM channels for three-phase inverters while the 18 embedded 18x18 multipliers execute Park and Clarke transforms for field-oriented control (FOC) in real time. The two on-chip PLLs synthesize high-resolution switching frequencies from a single external crystal, eliminating external clock-generation ICs. Its 36 M4K RAM blocks store sine/cosine lookup tables and current-loop setpoints with single-cycle access. The I8 industrial speed grade ensures reliable operation from -40 C to +100 C in cabinet environments. Compared with a DSP+microcontroller pair, this single-chip approach reduces BOM cost and PCB area.
Рекомендуется
Software-Defined Radio Front-End
The EP2C8Q208I8 is well-suited for software-defined radio (SDR) front-end signal processing because its 8,256 LEs and 18 hardware multipliers deliver the parallel arithmetic throughput needed for digital downconversion (DDC), filtering, and demodulation. The M4K RAM blocks implement efficient FIR/IIR filter banks and small FFT cores with deterministic latency. Multi-volt I/O support (1.5 V to 3.3 V) interfaces directly to common ADCs and DACs without level shifters, simplifying PCB routing. The I8 industrial temperature grade meets outdoor and vehicular deployment requirements. Designers can leverage Cyclone II reference designs to accelerate development of complete SDR platforms.
Рекомендуется
Machine Vision and Image Processing
The EP2C8Q208I8 fits entry-level machine vision pipelines because its parallel LE fabric and 18 dedicated 18x18 multipliers accelerate Sobel, Gaussian, and pixel-level morphology operations frame-by-frame. The 138 user I/Os accept parallel CMOS image sensor data up to 18-bit per pixel and drive LCD preview outputs without external bus controllers. 36 M4K RAM blocks buffer line-scan image data and store convolution kernels. Industrial temperature rating suits factory-floor deployments. Compared with CPU-based vision pipelines, the FPGA implementation delivers deterministic latency and frees the host processor for higher-level inspection logic.
Рекомендуется
Legacy Communication Protocol Bridging
The EP2C8Q208I8 excels at protocol bridging - UART-to-Ethernet, SPI-to-PCIe, I2C-to-parallel - because its flexible I/O banks support mixed-voltage signals simultaneously (1.5 V, 1.8 V, 2.5 V, 3.3 V) without external translators. The 36 M4K RAM blocks implement FIFOs and ring buffers for asynchronous clock-domain crossings, while two PLLs generate independent clocks for each protocol domain. Industrial temperature grade and PQFP packaging make it ideal for factory retrofit modules. Reference designs available from Intel accelerate time-to-market.
Рекомендуется
Low-Cost Video Processing
The EP2C8Q208I8 supports low-cost video processing - scaling, color-space conversion, on-screen display overlay - because its parallel logic fabric delivers the throughput required for real-time 480p/576p pixel pipelines. Multipliers enable efficient chroma upsampling and sharpening filters, while M4K RAM blocks implement line buffers with single-cycle access. Multi-volt I/O interfaces directly to BT.656 video ADCs and DACs. The PQFP package simplifies hand-rework and prototype iterations. The I8 industrial speed grade supports outdoor signage and kiosk applications.
Рекомендуется
Industrial Data Acquisition and Control
The EP2C8Q208I8 is ideal for multi-channel data acquisition and control systems because its 138 user I/Os sample parallel ADC inputs, drive isolated digital outputs, and manage encoder inputs simultaneously without bus contention. The two PLLs generate independent ADC sampling clocks and DSP processing clocks from a single reference. 36 M4K RAM blocks accumulate sample buffers, while 18 multipliers execute real-time FFT and digital-filter operations. Industrial -40 C to +100 C temperature operation ensures reliable factory-floor deployment in unconditioned enclosures.
Рекомендуется
Сводка рекомендуемых товаров
Справочные инженерные данные для EP2C8Q208I8 — сравнение, рекомендации по проектированию и информация о соответствии.
Руководство по выбору
Сравнение с аналогами
| Параметр | Этот товар | EP2C8Q208C8N | EP2C8Q208C7N | EP2C8Q208C8 | EP2C8Q208C7 | EP2C8Q20818 |
|---|---|---|---|---|---|---|
| Package | 208-pin BFQFP (PQFP) | 208-pin BFQFP (PQFP) - same | 208-pin BFQFP (PQFP) - same | 208-pin BFQFP (PQFP) - same | 208-pin BFQFP (PQFP) - same | 208-pin BFQFP (PQFP) - same |
| Brand | Intel | Intel | Intel | Intel | Intel | Intel |
| Logic Elements | 8,256 | 8,256 | 8,256 | 8,256 | 8,256 | 8,256 |
| Speed Grade | I8 (industrial) | C8 (commercial) | C7 (commercial, faster) | C8 (commercial) | C7 (commercial, faster) | I8 (industrial) |
| Operating Temperature | -40 C to +100 C | 0 C to +85 C | 0 C to +85 C | 0 C to +85 C | 0 C to +85 C | -40 C to +100 C |
| User I/O Count | 138 | 138 | 138 | 138 | 138 | 138 |
| Embedded Multipliers | 18 x (18x18) | 18 x (18x18) | 18 x (18x18) | 18 x (18x18) | 18 x (18x18) | 18 x (18x18) |
| Lifecycle Status | Last-time-buy | Last-time-buy | Last-time-buy | Last-time-buy | Last-time-buy | Last-time-buy |
Ключевые отличия
- Industrial -40 C to +100 C speed grade (против EP2C8Q208C8N)
- Industrial temperature qualification (против EP2C8Q208C7N)
- RoHS lead-free finish variant available (против EP2C8Q208C8)
Заметки по проектированию
Place 0.1 uF and 0.01 uF ceramic decoupling capacitors as close as physically possible to every VCCINT and VCCIO pin. Use one bulk 100 uF tantalum or aluminum-polymer capacitor per voltage rail. Estimate: at typical 50% toggle rate the EP2C8Q208I8 draws ~250 mA from VCCINT and ~100 mA from each VCCIO bank - verify with the Quartus II PowerPlay early estimator before final layout.
Use a four-layer PCB with a continuous solid ground plane directly under the EP2C8Q208I8 PQFP body to minimize simultaneous-switching-noise (SSN) on the 138 user I/Os. Keep all 208 PQFP leads as short as possible (under 5 mm) and route differential pairs (LVDS) with 100 ohm differential impedance. Provide dedicated stitching vias between ground layers around the device perimeter every 100 mil.
Configure unused user I/O pins as tri-stated inputs with weak pull-up resistors in the Quartus II pin planner to prevent floating inputs that can cause excessive I/O bank current. For DDR SDRAM interfaces, use the dedicated DQS delay lines and follow the Cyclone II external memory interface guidelines for tDSS, tDSH, and tDQSS timing - skipping these usually results in intermittent read errors that are very difficult to debug.
Do not confuse the C8 commercial speed grade with the I8 industrial speed grade when ordering - they share the same PQFP footprint but the C8 variant is only rated 0 C to +85 C and will fail in outdoor or industrial enclosures. Also verify RoHS status before procurement: the legacy BFQFP package is non-RoHS and may require a lead-free-compatible solder profile during reflow rework.
Информация о соответствии
Legacy 208-pin BFQFP package is non-RoHS per ICs-100 listing. Lead-free variants exist in the EP2C8Q208C8N / EP2C8Q208C7N speed-grade family. Not AEC-Q100 qualified - choose Cyclone IV or Cyclone 10 LP for automotive applications.
