EPF8820ARC240-4N - FLEX 8000 FPGA, 880 LE, 240-Pin RQFP | Altera
部品番号: EPF8820ARC240-4N ✗ 生産終了| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $28.5 | $28.50 |
| 10 | $25.75 | $257.50 |
| 100 | $22.4 | $2,240.00 |
| 500 | $19.95 | $9,975.00 |
| 1,000 | $17.5 | $17,500.00 |
EPF8820ARC240-4N 概要
A Field-Programmable Gate Array (FPGA) is a semiconductor integrated circuit containing an array of configurable logic blocks (CLBs/LEs), programmable interconnects, and programmable I/O cells, all controlled by SRAM-based configuration memory. The FLEX 8000 sits in the broader taxonomy: programmable logic device (PLD) -> EPLD/FPGA hybrid -> complex programmable logic device (CPLD) / FPGA -> SRAM-based FPGA -> SRAM-based PLD family. Modern successors include the Altera/Intel Cyclone series, Lattice ECP5, and Xilinx Spartan families; however, FLEX 8000 remains deployed in legacy industrial, telecommunications, and military systems where its deterministic interconnect delay and long-term availability through military/extended programs are valued.
Key features include 880 LEs, a maximum of 24 LABs (Logic Array Blocks), 24 user I/O pins per LAB row, in-system programmability via the Altera ByteBlaster or BitBlaster, 5V-tolerant I/O on selected variants, and JTAG boundary-scan support. The architecture uses a FastTrack interconnect that provides predictable, repeatable routing delays regardless of logic placement, simplifying static timing closure. Configuration memory is volatile SRAM, requiring an external configuration EPROM or controller at power-up.
Technical depth: the FLEX 8000 LE consists of a 4-input look-up table (LUT) feeding a programmable register with carry-chain and cascade-chain support. Each LAB contains 8 LEs plus local interconnect, control signals, and I/O. The 240-pin RQFP package offers 192 usable I/O pins, making the EPF8820ARC240-4N well suited to wide-bus interface designs (32-bit and 64-bit parallel buses, including PCI bus interfaces). Operating voltage is 5.0 V core with 5.0 V or 3.3 V I/O depending on variant.
Typical applications include PCI bus interfaces, TTL-level ASIC/coprocessor integration, high-speed state machines, glue logic replacement, digital signal processing preprocessing, and data path manipulation. The high pin count makes it ideal for integrating multiple 32-bit buses into a single device.
Design consideration: FLEX 8000 FPGAs require external configuration memory at every power-up; the EPC2 or EPC8 configuration EPROM, or a microcontroller, must be specified alongside the FPGA. Confirm supply through Altera/Intel FPGA long-term/legacy support channels before committing to new designs.
This page synthesizes distributor pricing, same-brand pin-compatible alternatives from the Site MPN list, application circuits, and design notes not consolidated in the original Altera datasheet.
ドロップイン代替品: EPF8820ARC240-4N — 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: EPF8820ARC240-4N （同一形状・フットプリント） — 相違点: Package, Process Technology, Speed Grade, Mounting Type, Configuration Memory.
クイック比較ツール — 並列比較する代替部品を選択:
EPF8820ARC240-4
✅ ドロップイン✓ 在庫あり
$17.2 / 個
データシートを見る →EPF8820ARC240-3N
✅ ドロップイン✓ 在庫あり
$16.4 / 個
データシートを見る →EPF8820ARC240-3
✅ ドロップイン✓ 在庫あり
$24 / 個
データシートを見る →EPF8820ARC240-4N 最大定格＆電気的特性
| Family | FLEX 8000 |
| Device Model | EPF8820A |
| Logic Elements (LEs) | 880 |
| Maximum Logic Array Blocks (LABs) | 24 |
| Typical Gates | 8000 |
| User I/O Pins (max) | 192 |
| パッケージ | 240-pin RQFP |
| Speed Grade | -4 |
| Process Technology | 0.42 µm CMOS SRAM |
| Configuration Memory | Volatile SRAM (requires external config EPROM) |
| Operating Voltage (Core) | 5.0 V |
| I/O Voltage | 5.0 V / 3.3 V (variant dependent) |
| 動作温度 | Commercial 0C to +70C (N suffix) |
| 実装タイプ | Surface Mount (RQFP) |
| RoHS ステータス | Non-compliant (N suffix - Pb-bearing RQFP) |
| Lead-Free | no (N suffix indicates non-lead-free) |
EPF8820ARC240-4N 240-pin rqfp ピン配置ガイド
EPF8820ARC240-4N (240-pin rqfp パッケージ) のピン配置。 このデジタルICには、GPIO、通信インターフェース (UART、SPI、I2C)、および電源ピンが含まれています。代替ピン機能と設定オプションについては、メーカーのデータシートを参照してください。組み込みシステム設計とPCBレイアウトに不可欠です。
詳細なピン配置データはありません: EPF8820ARC240-4N.
詳細は データシート をご参照ください。
主な用途
EPF8820ARC240-4N の用途: 7 件s: PCI Bus Interface Controller, Glue Logic Integration & ASIC Replacement, High-Speed State Machine Controller, Wide-Bus Data Path Manipulation, Digital Signal Processing Preprocessor, Telecommunications Channelized Interface, Industrial Coprocessor Integration.
PCI Bus Interface Controller
The EPF8820ARC240-4N's 880 Logic Elements and 192 available I/O pins provide ample capacity to implement a full 32-bit PCI (33 MHz) target or master controller alongside peripheral glue logic. Its deterministic FastTrack interconnect ensures predictable timing for PCI bus arbitration and data transfer phases, and the 240-pin RQFP package exposes enough pins to route the 32-bit multiplexed PCI address/data bus plus control signals (FRAME#, IRDY#, TRDY#, DEVSEL#) without bus multiplexing.
おすすめ
Glue Logic Integration & ASIC Replacement
With 880 LEs and 24 LABs, the EPF8820ARC240-4N is well suited to replace multiple discrete TTL/CMOS glue logic packages on legacy 5V motherboards. Engineers typically consolidate address decoding, wait-state generation, bus arbitration, and interrupt controllers into a single FLEX 8000 device, simplifying PCB layout and reducing BOM cost. The in-system programmability via ByteBlaster allows late-stage board revision without respinning mask-programmed logic.
おすすめ
High-Speed State Machine Controller
The FLEX 8000 family's predictable interconnect delay (driven by FastTrack routing) makes the EPF8820ARC240-4N well suited to implement high-speed state machines running up to 100 MHz internal operation. Applications include protocol converters (UART, SPI, I2C bridges), DMA controllers, and real-time control sequencers for industrial automation. The 880-LE capacity supports complex multi-state machines with hundreds of states and parallel datapath operations.
おすすめ
Wide-Bus Data Path Manipulation
The 192 available I/O pins of the EPF8820ARC240-4N make it ideal for integrating multiple 32-bit or 16-bit parallel buses (ISA, EISA, VMEbus, VXI, or proprietary backplanes) into a single device. The FLEX 8000 LUT-based LE structure efficiently implements bus transceivers, parity generators, byte-swapping logic, and FIFO control. Designers can replace multiple bus-interface ASICs with one programmable device, simplifying board design and enabling late-stage protocol changes.
おすすめ
Digital Signal Processing Preprocessor
Although not as capable as modern DSP FPGAs, the EPF8820ARC240-4N's 880 LEs and dedicated carry-chain logic are sufficient for DSP preprocessing tasks such as FIR/IIR filter coefficient pipelines, FFT butterfly preprocessors, video sync stripping, and image preprocessing front-ends. The FLEX 8000 deterministic interconnect enables fixed-latency DSP pipelines, which is critical for synchronous signal processing. The 5V tolerant I/O interfaces cleanly with legacy video ADCs and DACs.
おすすめ
Telecommunications Channelized Interface
The EPF8820ARC240-4N's high I/O count and deterministic timing make it suitable for telecommunications channelized interface cards (T1/E1 framers, HDLC controllers, TDM switches) in legacy telecom equipment. The 240-pin RQFP package provides sufficient pins for parallel TDM bus interfaces (typically 8/16/32 timeslot data plus framing), and the FLEX 8000 architecture supports per-channel independent processing. Long-term Altera/Intel FPGA legacy support makes this part viable for telecom-grade reliability.
おすすめ
Industrial Coprocessor Integration
The EPF8820ARC240-4N can be paired with a microcontroller or DSP as a high-speed coprocessor for industrial control systems, handling time-critical I/O operations, encoder/counter decoding (quadrature, SSI, resolver), and PWM generation. The 880 LEs support multiple parallel counter/timer channels and the 192 I/O pins interface directly with industrial encoder/sensor inputs without external logic. The 5V core voltage matches legacy 5V industrial bus systems.
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: EPF8820ARC240-4N — 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 | EPF8820ARC240-4 | EPF8820ARC240-3N | EPF8820ARC240-3 |
|---|---|---|---|---|
| Package | 240-pin RQFP | 240-pin RQFP - same | 240-pin RQFP - same | 240-pin RQFP - same |
| Brand | Altera | Altera - same | Altera - same | Altera - same |
| Logic Elements | 880 LEs | 880 LEs | 880 LEs | 880 LEs |
| Speed Grade | -4 | -4 (same) | -3 (faster) | -3 (faster) |
| Maximum User I/O | 192 | 192 | 192 | 192 |
| Operating Temperature (N suffix) | Commercial (N suffix) | Commercial | Commercial | Commercial |
| Logic Array Blocks | 24 LABs | 24 LABs | 24 LABs | 24 LABs |
| Configuration Memory | Volatile SRAM (EPC2/EPC4/EPC8) | Volatile SRAM (EPC2/EPC4/EPC8) | Volatile SRAM (EPC2/EPC4/EPC8) | Volatile SRAM (EPC2/EPC4/EPC8) |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete |
主な差別化要因
- Highest-density FLEX 8000 in 240-pin RQFP （vs EPF8820ARC208-4N)
- Slower speed grade (-4) gives wider timing margin （vs EPF8820ARC240-3N)
- Mature FLEX 8000 architecture with extensive design heritage （vs EPF8282ATC100-4N)
設計ノート
The EPF8820ARC240-4N operates from a single 5.0 V core supply and requires a separate VCCIO for I/O banks. Power sequencing: VCC must rise monotonically before VCCIO, and all VCC pins must be connected for proper operation. Decouple each VCC pin with a 0.1 µF ceramic capacitor placed within 5 mm of the pin; add a bulk 33 µF tantalum or 100 µF electrolytic capacitor near the device. Estimated: at maximum toggle rate, ICC can reach 200-300 mA; size the 5V regulator accordingly with at least 30% margin.
The 240-pin RQFP package has 0.5 mm pitch leads; use a 4-layer PCB with continuous power and ground planes to control lead inductance. Route all clock signals (CLK0-CLK3) as short, impedance-controlled traces with ground reference; keep configuration signals (DCLK, nCONFIG, nSTATUS, CONF_DONE) away from switching I/O. Place the configuration EPROM within 50 mm of the FPGA to ensure clean configuration timing.
FLEX 8000 devices use volatile SRAM configuration memory; the FPGA loses configuration at every power-down and must be reconfigured at power-up. Forgetting to specify the configuration EPROM (EPC2, EPC4, EPC8, or EPC16) is the most common design error. Also: the JTAG chain must include the FPGA TAP plus any other JTAG devices, with TMS and TCK properly buffered. Do not leave unused I/O pins floating - configure them as outputs driving ground to minimize power and noise.
For 33 MHz PCI bus operation, maintain 65 Ω ±10% characteristic impedance on the PCI bus traces with matched trace lengths (within 25 mm across the 32-bit bus). The EPF8820ARC240-4N's 5V I/O is electrically compatible with PCI signaling levels, but verify VCCIO is configured for 5.0 V PCI operation. Add source-series termination (22-33 Ω) on PCI outputs to damp reflections. Confirm PCI compliance through signal-integrity simulation if the bus length exceeds 200 mm.
コンプライアンス情報
EPF8820ARC240-4N is a 1990s-vintage 5.0 V CMOS FPGA in Pb-bearing RQFP package (N suffix indicates non-lead-free / non-RoHS per Altera convention). Not AEC-Q100 qualified. For RoHS-compliant replacement, consider the EP4CE22F17 in modern Cyclone IV family with PCB redesign.
