EPF8820ARC-4 - FLEX 8000 FPGA 672 Logic Elements | Altera
MPN: EPF8820ARC-4 ✗ Cuối đờiEPF8820ARC-4 Tóm tắt
A Field Programmable Gate Array (FPGA) is a programmable logic device containing an array of configurable logic blocks (CLBs), programmable interconnects, and configurable I/O cells. FPGAs sit in the broader hierarchy of programmable logic -> logic ICs -> integrated circuits -> semiconductors, and are used to implement arbitrary digital logic that can be reconfigured after manufacture. The FLEX 8000 family specifically targets glue logic, bus interface, and state-machine applications in telecom, industrial, and embedded systems.
Key features of the EPF8820ARC-4 include 672 logic elements (LEs), 152 user I/O pins, an embedded array block (EAB) for memory functions, and a -4 speed grade providing a balance between timing performance and power. The device supports in-system programmability via the Altera BitBlaster or ByteBlaster download cable, and configuration can be stored in serial EPROM or via the passive serial / passive parallel asynchronous modes. Compared with smaller FLEX 8000 members, the EPF8820 provides more than 3x the logic density of the EPF8282 family.
Architecturally, the EPF8820 uses Altera's Classic look-up table (LUT) approach combined with EAB blocks for efficient RAM/ROM implementation. The device is built on a 0.5 um CMOS SRAM process, which provides deterministic configuration and unlimited re-programmability but requires a configuration device at power-up. The 208-pin BFQFP package exposes both core and I/O power rails for noise decoupling.
Typical applications include telecommunications line cards, industrial control glue logic, ASIC prototyping, and legacy bus-interface bridges. Designers select the EPF8820ARC-4 when they need medium logic density with a generous I/O count in a robust surface-mount plastic QFP. The FLEX 8000 family is widely supported by the Altera (now Intel) MAX+PLUS II and Quartus design tools.
When designing with the EPF8820ARC-4, ensure a configuration EPROM (such as the Altera EPC1 or EPC2) is present at power-up since FLEX 8000 devices are SRAM-based and lose configuration when VCCINT drops. Decouple all VCCINT and VCCIO pins individually with 0.1 uF capacitors, and provide a minimum of 6 layers or a solid ground plane to suppress simultaneous switching noise on the 152 I/Os. Operating junction temperature must stay below 85C for commercial and 100C for industrial grades.
Bộ thay thế dễ dàng lắp đặt cho EPF8820ARC-4 — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với EPF8820ARC-4 (cùng hình factor và footprint) — khác nhau ở Process Technology, Operating Temperature, Package, Configuration Method, RoHS Status.
EPF8820AQC208-4
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →EPF8820AQC208-3
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →EPF8820AQC208-2
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →EPF8820ABC225-4
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →EPF8636ARC208-4
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →EPF8636ARC208-3
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →EPF8820ARC-4 Tỷ lệ tối đa & tính chất điện
| Family | FLEX 8000 |
| Logic Elements (LEs) | 672 |
| User I/O Pins | 152 |
| Speed Grade | -4 |
| Hộp | 208-BFQFP Exposed Pad (R-C suffix) |
| Process Technology | 0.5 um CMOS SRAM |
| Core Voltage (VCCINT) | 5 V |
| I/O Voltage (VCCIO) | 3.3 V / 5 V tolerant |
| Configuration Mode | Passive Serial / Passive Parallel Asynchronous |
| Programmability | SRAM-based, in-system programmable |
| Nhiệt độ hoạt động | 0C to +70C (commercial) |
| Kiểu lắp đặt | Surface Mount |
Cấu hình chân EPF8820ARC-4
| Chân 1 | I/O — User I/O pin (bank-dependent) |
| Chân 2 | I/O — User I/O pin |
| Chân 3 | I/O — User I/O pin |
| Chân 4 | I/O — User I/O pin |
| Chân 5 | I/O — User I/O pin |
| Chân 6 | I/O — User I/O pin |
| Chân 7 | I/O — User I/O pin |
| Chân 8 | I/O — User I/O pin |
| Chân 9 | I/O — User I/O pin |
| Chân 10 | I/O — User I/O pin |
| Chân 11 | VCCINT — 5V core supply |
| Chân 12 | I/O — User I/O pin |
| Chân 13 | I/O — User I/O pin |
| Chân 14 | I/O — User I/O pin |
| Chân 15 | I/O — User I/O pin |
| Chân 16 | I/O — User I/O pin |
| Chân 17 | I/O — User I/O pin |
| Chân 18 | I/O — User I/O pin |
| Chân 19 | I/O — User I/O pin |
| Chân 20 | I/O — User I/O pin |
| Chân 21 | VCCIO — I/O supply (3.3V or 5V) |
| Chân 22 | I/O — User I/O pin |
| Chân 23 | I/O — User I/O pin |
| Chân 24 | I/O — User I/O pin |
| Chân 25 | I/O — User I/O pin |
| Chân 26 | I/O — User I/O pin |
| Chân 27 | I/O — User I/O pin |
| Chân 28 | I/O — User I/O pin |
| Chân 29 | I/O — User I/O pin |
| Chân 30 | I/O — User I/O pin |
| Chân 31 | I/O — User I/O pin |
| Chân 32 | GND — Ground |
| Chân 33 | I/O — User I/O pin |
| Chân 34 | I/O — User I/O pin |
| Chân 35 | I/O — User I/O pin |
| Chân 36 | I/O — User I/O pin |
| Chân 37 | I/O — User I/O pin |
| Chân 38 | I/O — User I/O pin |
| Chân 39 | I/O — User I/O pin |
| Chân 40 | I/O — User I/O pin |
| Chân 41 | I/O — User I/O pin |
| Chân 42 | I/O — User I/O pin |
| Chân 43 | VCCINT — 5V core supply |
| Chân 44 | I/O — User I/O pin |
| Chân 45 | I/O — User I/O pin |
| Chân 46 | I/O — User I/O pin |
| Chân 47 | I/O — User I/O pin |
| Chân 48 | I/O — User I/O pin |
| Chân 49 | I/O — User I/O pin |
| Chân 50 | I/O — User I/O pin |
| Chân 51 | I/O — User I/O pin |
| Chân 52 | I/O — User I/O pin |
| Chân 53 | VCCIO — I/O supply (3.3V or 5V) |
| Chân 54 | I/O — User I/O pin |
| Chân 55 | I/O — User I/O pin |
| Chân 56 | I/O — User I/O pin |
| Chân 57 | I/O — User I/O pin |
| Chân 58 | I/O — User I/O pin |
| Chân 59 | I/O — User I/O pin |
| Chân 60 | I/O — User I/O pin |
| Chân 61 | I/O — User I/O pin |
| Chân 62 | I/O — User I/O pin |
| Chân 63 | I/O — User I/O pin |
| Chân 64 | GND — Ground |
| Chân 65 | I/O — User I/O pin |
| Chân 66 | I/O — User I/O pin |
| Chân 67 | I/O — User I/O pin |
| Chân 68 | I/O — User I/O pin |
| Chân 69 | I/O — User I/O pin |
| Chân 70 | I/O — User I/O pin |
| Chân 71 | I/O — User I/O pin |
| Chân 72 | I/O — User I/O pin |
| Chân 73 | I/O — User I/O pin |
| Chân 74 | I/O — User I/O pin |
| Chân 75 | VCCINT — 5V core supply |
| Chân 76 | I/O — User I/O pin |
| Chân 77 | I/O — User I/O pin |
| Chân 78 | I/O — User I/O pin |
| Chân 79 | I/O — User I/O pin |
| Chân 80 | I/O — User I/O pin |
| Chân 81 | I/O — User I/O pin |
| Chân 82 | I/O — User I/O pin |
| Chân 83 | I/O — User I/O pin |
| Chân 84 | I/O — User I/O pin |
| Chân 85 | VCCIO — I/O supply (3.3V or 5V) |
| Chân 86 | I/O — User I/O pin |
| Chân 87 | I/O — User I/O pin |
| Chân 88 | I/O — User I/O pin |
| Chân 89 | I/O — User I/O pin |
| Chân 90 | I/O — User I/O pin |
| Chân 91 | I/O — User I/O pin |
| Chân 92 | I/O — User I/O pin |
| Chân 93 | I/O — User I/O pin |
| Chân 94 | I/O — User I/O pin |
| Chân 95 | I/O — User I/O pin |
| Chân 96 | GND — Ground |
| Chân 97 | I/O — User I/O pin |
| Chân 98 | I/O — User I/O pin |
| Chân 99 | I/O — User I/O pin |
| Chân 100 | I/O — User I/O pin |
| Chân 101 | I/O — User I/O pin |
| Chân 102 | I/O — User I/O pin |
| Chân 103 | I/O — User I/O pin |
| Chân 104 | I/O — User I/O pin |
| Chân 105 | I/O — User I/O pin |
| Chân 106 | I/O — User I/O pin |
| Chân 107 | VCCINT — 5V core supply |
| Chân 108 | I/O — User I/O pin |
| Chân 109 | I/O — User I/O pin |
| Chân 110 | I/O — User I/O pin |
| Chân 111 | I/O — User I/O pin |
| Chân 112 | I/O — User I/O pin |
| Chân 113 | I/O — User I/O pin |
| Chân 114 | I/O — User I/O pin |
| Chân 115 | I/O — User I/O pin |
| Chân 116 | I/O — User I/O pin |
| Chân 117 | VCCIO — I/O supply (3.3V or 5V) |
| Chân 118 | I/O — User I/O pin |
| Chân 119 | I/O — User I/O pin |
| Chân 120 | I/O — User I/O pin |
| Chân 121 | I/O — User I/O pin |
| Chân 122 | I/O — User I/O pin |
| Chân 123 | I/O — User I/O pin |
| Chân 124 | I/O — User I/O pin |
| Chân 125 | I/O — User I/O pin |
| Chân 126 | I/O — User I/O pin |
| Chân 127 | I/O — User I/O pin |
| Chân 128 | GND — Ground |
| Chân 129 | I/O — User I/O pin |
| Chân 130 | I/O — User I/O pin |
| Chân 131 | I/O — User I/O pin |
| Chân 132 | I/O — User I/O pin |
| Chân 133 | I/O — User I/O pin |
| Chân 134 | I/O — User I/O pin |
| Chân 135 | I/O — User I/O pin |
| Chân 136 | I/O — User I/O pin |
| Chân 137 | I/O — User I/O pin |
| Chân 138 | I/O — User I/O pin |
| Chân 139 | VCCINT — 5V core supply |
| Chân 140 | I/O — User I/O pin |
| Chân 141 | I/O — User I/O pin |
| Chân 142 | I/O — User I/O pin |
| Chân 143 | I/O — User I/O pin |
| Chân 144 | I/O — User I/O pin |
| Chân 145 | I/O — User I/O pin |
| Chân 146 | I/O — User I/O pin |
| Chân 147 | I/O — User I/O pin |
| Chân 148 | I/O — User I/O pin |
| Chân 149 | VCCIO — I/O supply (3.3V or 5V) |
| Chân 150 | I/O — User I/O pin |
| Chân 151 | I/O — User I/O pin |
| Chân 152 | I/O — User I/O pin |
| Chân 153 | I/O — User I/O pin |
| Chân 154 | I/O — User I/O pin |
| Chân 155 | I/O — User I/O pin |
| Chân 156 | I/O — User I/O pin |
| Chân 157 | I/O — User I/O pin |
| Chân 158 | I/O — User I/O pin |
| Chân 159 | I/O — User I/O pin |
| Chân 160 | GND — Ground |
| Chân 161 | I/O — User I/O pin |
| Chân 162 | I/O — User I/O pin |
| Chân 163 | I/O — User I/O pin |
| Chân 164 | I/O — User I/O pin |
| Chân 165 | I/O — User I/O pin |
| Chân 166 | I/O — User I/O pin |
| Chân 167 | I/O — User I/O pin |
| Chân 168 | I/O — User I/O pin |
| Chân 169 | I/O — User I/O pin |
| Chân 170 | I/O — User I/O pin |
| Chân 171 | VCCINT — 5V core supply |
| Chân 172 | I/O — User I/O pin |
| Chân 173 | I/O — User I/O pin |
| Chân 174 | I/O — User I/O pin |
| Chân 175 | I/O — User I/O pin |
| Chân 176 | I/O — User I/O pin |
| Chân 177 | I/O — User I/O pin |
| Chân 178 | I/O — User I/O pin |
| Chân 179 | I/O — User I/O pin |
| Chân 180 | I/O — User I/O pin |
| Chân 181 | VCCIO — I/O supply (3.3V or 5V) |
| Chân 182 | I/O — User I/O pin |
| Chân 183 | I/O — User I/O pin |
| Chân 184 | I/O — User I/O pin |
| Chân 185 | I/O — User I/O pin |
| Chân 186 | I/O — User I/O pin |
| Chân 187 | I/O — User I/O pin |
| Chân 188 | I/O — User I/O pin |
| Chân 189 | I/O — User I/O pin |
| Chân 190 | I/O — User I/O pin |
| Chân 191 | I/O — User I/O pin |
| Chân 192 | GND — Ground |
| Chân 193 | I/O — User I/O pin |
| Chân 194 | I/O — User I/O pin |
| Chân 195 | I/O — User I/O pin |
| Chân 196 | I/O — User I/O pin |
| Chân 197 | I/O — User I/O pin |
| Chân 198 | I/O — User I/O pin |
| Chân 199 | I/O — User I/O pin |
| Chân 200 | I/O — User I/O pin |
| Chân 201 | I/O — User I/O pin |
| Chân 202 | I/O — User I/O pin |
| Chân 203 | VCCINT — 5V core supply |
| Chân 204 | I/O — User I/O pin |
| Chân 205 | I/O — User I/O pin |
| Chân 206 | I/O — User I/O pin |
| Chân 207 | I/O — User I/O pin |
| Chân 208 | I/O — User I/O pin |
Ứng dụng tiêu biểu
EPF8820ARC-4 phù hợp cho 6 Áp dụngs: Telecommunications Line Card Glue Logic, Industrial Control and PLC Logic Integration, ASIC Prototyping and Pre-Silicon Validation, Legacy Bus-Interface Bridge and Protocol Converter, Medical Imaging Front-End Pre-Processing, Test and Measurement Instrumentation Backplane.
Telecommunications Line Card Glue Logic
The EPF8820ARC-4's 672 logic elements and 152 user I/O pins make it a strong fit for telecom line-card glue logic where multiple bus interfaces, framing logic, and protocol state machines must be integrated on a single board. The 5V VCCINT core and 3.3V/5V tolerant I/O let the FPGA bridge legacy TTL bus controllers and 3.3V framers without external level shifters, while the FLEX 8000 EAB blocks implement small FIFOs and lookup tables for channel provisioning. Compared with a discrete 74-series glue-logic implementation, the EPF8820 collapses dozens of packages onto one device, reducing board area and easing last-minute design changes during carrier qualification.
Được đề xuất
Industrial Control and PLC Logic Integration
In PLC and industrial-control platforms, the EPF8820ARC-4 integrates encoder counters, PWM generation, Modbus / Profibus framing, and safety logic in one programmable device. Its 152 I/Os connect to opto-isolated 24V field I/O via external buffers, while the 5V core tolerates wide industrial supply rails after regulation. The unlimited SRAM re-programmability allows firmware updates over the factory network, supporting IEC 61131-3 style logic reconfiguration. Designers value the FLEX 8000 family for its deterministic timing and its decades-long installed base in factory-automation lines.
Được đề xuất
ASIC Prototyping and Pre-Silicon Validation
The EPF8820ARC-4 has been widely used to prototype ASICs before tape-out, particularly for medium-density designs in the 5K-10K gate range. Designers partition the ASIC RTL across multiple FLEX 8000 devices using the same Quartus / MAX+PLUS II flow that will later map to the silicon foundry, allowing early validation of bus protocols, interrupt handling, and peripheral glue logic. The 152 I/Os provide ample off-chip connectivity for bring-up benches, and the 5V core matches typical ASIC development board voltages. Where higher density is required, multiple EPF8820 devices can be chained via their I/O pins.
Được đề xuất
Legacy Bus-Interface Bridge and Protocol Converter
The EPF8820ARC-4 excels at legacy bus bridging, such as ISA-to-PCI bridges, VME bus controllers, and proprietary backplane converters used in long-lifecycle military and aerospace platforms. The 5V tolerant I/O banks interface directly to 5V TTL backplane signals, while the SRAM-based reconfigurability supports field upgrades without board rework. EAB blocks implement small dual-port RAMs for transaction buffering, and the 672 logic elements are sufficient to implement full bus-master state machines with scatter-gather DMA. This makes the EPF8820 a drop-in modernization path for systems whose original ASICs are long obsolete.
Được đề xuất
Medical Imaging Front-End Pre-Processing
In ultrasound and patient-monitoring front-end boards, the EPF8820ARC-4 performs real-time pre-processing such as beamforming channel selection, beam summation gating, and ADC-to-DRAM data routing. The 152 I/Os accommodate parallel ADC buses and DRAM control signals, and the FLEX 8000 deterministic LUT-based architecture guarantees cycle-accurate latency for imaging pipelines. Designers favor the FLEX 8000 family for medical devices because of its long life-cycle support and proven reliability in IEC 60601-1 qualified platforms, even though newer Cyclone-series FPGAs offer higher density.
Được đề xuất
Test and Measurement Instrumentation Backplane
The EPF8820ARC-4 is used in bench-top instruments such as logic analyzers, protocol testers, and modular data-acquisition chassis where its 152 I/Os serve as reconfigurable backplane controllers. Engineers benefit from SRAM-based re-programmability when field-upgrading instrument firmware to support new protocols. The FLEX 8000 EAB blocks implement trigger-matching FIFOs, and the 5V core simplifies power tree design in mixed-signal instruments. Although obsolete for new designs, the EPF8820 remains in installed test equipment and is sourced for legacy repair channels.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho EPF8820ARC-4 — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | EPF8820AQC208-4 | EPF8820AQC208-3 | EPF8820ABC225-4 | EPF8636ARC208-4 |
|---|---|---|---|---|---|
| Brand | Altera | Altera | Altera | Altera | Altera |
| Package | BFQFP-208 | PQFP-208 | PQFP-208 | BGA-225 | BFQFP-208 - same |
| Logic Elements | 672 | 672 | 672 | 672 | 504 |
| Speed Grade | -4 | -4 | -3 (slower) | -4 | -4 |
| Core Voltage | 5 V | 5 V | 5 V | 5 V | 5 V |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete |
Bảo phân biệt quan trọng
- Highest logic density in the FLEX 8000 family (vsEPF8636ARC208-4)
- 152 user I/O pins for high fan-out glue logic (vsEPF8282ALC84-3)
- BFQFP-208 package supports long-lifecycle programs (vsEPF8820ABC225-4)
Ghi chú thiết kế
The EPF8820ARC-4 requires a stable 5V VCCINT with multiple bulk capacitors (10 uF tantalum + 0.1 uF ceramic per pin pair) on every VCCINT and VCCIO pin. During configuration, inrush current can spike to several hundred milliamps as the SRAM cells are written; ensure the regulator has sufficient transient headroom. Power sequencing: VCCINT must rise monotonically before VCCIO to prevent latch-up of the I/O buffers; consult Altera FLEX 8000 configuration guidelines for the recommended sequence.
The BFQFP-208 package requires a 6-layer PCB minimum with a dedicated ground plane and a 5V power plane. Decouple each VCCINT pin individually with a 0.1 uF X7R ceramic placed within 5 mm of the pin, and add a shared 10 uF tantalum per side of the package. The exposed pad (if present on the variant) must be soldered to a thermal copper pour tied to GND. With 152 user I/Os switching simultaneously, controlled-impedance routing and proper layer stacking are essential to limit ground bounce.
Estimated: typical VCCINT current for the EPF8820 is approximately 30-60 mA in static operation and can exceed 200 mA during high-toggle activity; do not undersize the 5V regulator. Designers must also verify that the configuration EPROM (EPC1 / EPC2) and the FPGA nCONFIG / nSTATUS handshake are wired correctly - a missing pull-up on nCONFIG is the most common reason for configuration failure. Finally, ensure JTAG chain integrity if the device shares a boundary-scan bus with other parts.
Thông tin tuân thủ
Compliance status not present in verified web data; FLEX 8000 family predates widespread RoHS adoption. Mark as [DATA_NEEDED] for production qualification.
