EPF8820AQC208-3N - FLEX 8000 FPGA 8K Gates 672 Cells | Altera
N.º da peça: EPF8820AQC208-3N ✗ Fim de vida| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $28.5 | $28,50 |
| 10 | $24.9 | $249,00 |
| 100 | $19.75 | $1.975,00 |
| 500 | $15.2 | $7.600,00 |
| 1.000 | $11.4 | $11.400,00 |
EPF8820AQC208-3N Visão geral
An FPGA (Field-Programmable Gate Array) is a semiconductor IC whose logic and interconnect resources are configured by the end user via a bitstream loaded into on-chip SRAM configuration memory. FPGAs sit above CPLDs, ASSPs, and discrete logic in the programmable logic hierarchy and below custom ASICs in unit cost but above them in design flexibility and time-to-market. The FLEX 8000 family pioneered high-density, register-rich CMOS PLDs targeting glue logic, bus integration, and system-level integration that previously required multiple 32-bit bus devices in separate packages.
Key features of the EPF8820AQC208-3N include in-circuit reconfigurability (ICR) via external configuration devices or a system controller, fast 16-bit loadable counter performance rated at 95 MHz, a 16-to-1 multiplexer delay of 7.9 ns at the -3 speed grade, and CMOS SRAM-based configuration elements that allow unlimited reconfiguration. The 152 user I/O count supports wide parallel bus interfaces, and the high-pin-count 208-FQFP package integrates multiple 32-bit buses into a single device. Configuration is performed at system power-up using data stored in an industry-standard parallel EPROM or via Altera EPC1, EPC1213, EPC1064, or EPC1441 serial configuration devices.
Architecturally, FLEX 8000 devices use Logic Elements (LEs) tied together by a continuous FastTrack interconnect, with embedded array blocks (EABs) for memory-intensive functions. The 0.42 µm process supports up to 16,000 usable gates, and the speed grade -3N indicates the -3 speed bin (slower than -4) with N denoting a non-lead-free or commercial finish variant. Typical applications include industrial control, telecom interface cards, and legacy bus-bridge replacement.
Typical applications include industrial automation control, legacy telecom interface cards, PCI bus bridges, glue-logic consolidation in 5 V industrial systems, and educational/hobbyist development platforms. The wide I/O count makes it suitable for interfacing with parallel SRAM, FIFOs, and microprocessors of its era. Design with care when migrating to modern 3.3 V systems; the 5 V I/Os are tolerant but not strictly 3.3 V-compliant.
When designing with this FPGA, observe that configuration data is volatile and must be reloaded on every power-up. Ensure proper decoupling of VCCINT and VCCIO rails, and verify timing closure against the -3 speed grade rather than the -2 or -4 grades. For new designs, consider that FLEX 8000 is in legacy lifecycle status.
This page synthesizes distributor pricing, same-family drop-in alternatives, FQFP-208 footprint compatibility data, and practical configuration-design notes not found in the original FLEX 8000 datasheet - useful for engineers maintaining legacy 5 V systems.
Alternativas drop-in para EPF8820AQC208-3N — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com EPF8820AQC208-3N (mesmo formato e footprint) — diferindo em Package, Process Technology, Logic Array Blocks (LABs), Configuration Method, Usable Gates.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
EPF8820AQC208-3
✅ Drop-In✓ Em estoque
$18.95 / unidade
Ver ficha técnica →EPF8820AQC208-2N
✅ Drop-In✓ Em estoque
$5.1 / unidade
Ver ficha técnica →EPF8820AQC208-2
✅ Drop-In✓ Em estoque
$22.8 / unidade
Ver ficha técnica →EPF8820AQC208-4
✅ Drop-In✓ Em estoque
$32.8 / unidade
Ver ficha técnica →EPF8636AQC208-3
✅ Drop-In✓ Em estoque
$28 / unidade
Ver ficha técnica →EPF8636AQC208-4N
✅ Drop-In✓ Em estoque
$10.4 / unidade
Ver ficha técnica →EPF8820AQC208-3N Classificações máximas e características elétricas
| Device Family | FLEX 8000 |
| Product Type | FPGA (Field-Programmable Gate Array) / Loadable PLD |
| Usable Gates | 8,000 (up to 16,000 family maximum) |
| Logic Cells (LEs) | 672 |
| User I/Os | 152 |
| Logic Elements / Registers | 1,500 |
| Process Technology | 0.42 µm CMOS SRAM |
| Tensão de alimentação | 5 V |
| Temperatura de operação | 0 °C to 70 °C (Commercial) |
| Package Type | FQFP-208 (PQFP-208, gull-wing) |
| Package Code | FQFP |
| Terminal Form | Gull Wing |
| Terminal Count | 208 |
| Speed Grade | -3 (16-bit loadable counter 95 MHz; 16-to-1 MUX 7.9 ns) |
| Configuration Memory | CMOS SRAM (volatile, in-circuit reconfigurable) |
| Configuration Devices Supported | EPC1, EPC1213, EPC1064, EPC1441 |
| Tipo de montagem | Surface Mount |
Configuração de pinos do EPF8820AQC208-3N
| Pino 1 | I/O — User I/O pin (bank 1) |
| Pino 2 | I/O — User I/O pin (bank 1) |
| Pino 3 | I/O — User I/O pin (bank 1) |
| Pino 4 | VCCINT — Internal core supply (5 V) |
| Pino 5 | I/O — User I/O pin (bank 1) |
| Pino 6 | I/O — User I/O pin (bank 1) |
| Pino 7 | I/O — User I/O pin (bank 1) |
| Pino 8 | I/O — User I/O pin (bank 1) |
| Pino 9 | I/O — User I/O pin (bank 1) |
| Pino 10 | GND — Ground |
| Pino 11 | I/O — User I/O pin (bank 1) |
| Pino 12 | I/O — User I/O pin (bank 1) |
| Pino 13 | I/O — User I/O pin (bank 1) |
| Pino 14 | I/O — User I/O pin (bank 1) |
| Pino 15 | I/O — User I/O pin (bank 1) |
| Pino 16 | VCCIO1 — I/O bank 1 supply (5 V) |
| Pino 17 | I/O — User I/O pin (bank 1) |
| Pino 18 | I/O — User I/O pin (bank 1) |
| Pino 19 | I/O — User I/O pin (bank 1) |
| Pino 20 | I/O — User I/O pin (bank 1) |
| Pino 21 | I/O — User I/O pin (bank 1) |
| Pino 22 | GND — Ground |
| Pino 23 | I/O — User I/O pin (bank 1) |
| Pino 24 | I/O — User I/O pin (bank 1) |
| Pino 25 | I/O — User I/O pin (bank 1) |
| Pino 26 | I/O — User I/O pin (bank 1) |
| Pino 27 | I/O — User I/O pin (bank 1) |
| Pino 28 | VCCINT — Internal core supply (5 V) |
| Pino 29 | I/O — User I/O pin (bank 1) |
| Pino 30 | I/O — User I/O pin (bank 1) |
| Pino 31 | I/O — User I/O pin (bank 1) |
| Pino 32 | I/O — User I/O pin (bank 1) |
| Pino 33 | I/O — User I/O pin (bank 1) |
| Pino 34 | GND — Ground |
| Pino 35 | I/O — User I/O pin (bank 2) |
| Pino 36 | I/O — User I/O pin (bank 2) |
| Pino 37 | I/O — User I/O pin (bank 2) |
| Pino 38 | I/O — User I/O pin (bank 2) |
| Pino 39 | I/O — User I/O pin (bank 2) |
| Pino 40 | VCCIO2 — I/O bank 2 supply (5 V) |
| Pino 41 | I/O — User I/O pin (bank 2) |
| Pino 42 | I/O — User I/O pin (bank 2) |
| Pino 43 | I/O — User I/O pin (bank 2) |
| Pino 44 | I/O — User I/O pin (bank 2) |
| Pino 45 | I/O — User I/O pin (bank 2) |
| Pino 46 | GND — Ground |
| Pino 47 | I/O — User I/O pin (bank 2) |
| Pino 48 | I/O — User I/O pin (bank 2) |
| Pino 49 | I/O — User I/O pin (bank 2) |
| Pino 50 | I/O — User I/O pin (bank 2) |
| Pino 51 | I/O — User I/O pin (bank 2) |
| Pino 52 | VCCINT — Internal core supply (5 V) |
| Pino 53 | nCONFIG — Configuration control (active-low) |
| Pino 54 | nSTATUS — Configuration status (active-low) |
| Pino 55 | CONF_DONE — Configuration done (active-high) |
| Pino 56 | DCLK — Configuration clock |
| Pino 57 | DATA0 — Configuration data input (bit 0) |
| Pino 58 | I/O — User I/O pin (bank 3) |
| Pino 59 | I/O — User I/O pin (bank 3) |
| Pino 60 | I/O — User I/O pin (bank 3) |
| Pino 61 | I/O — User I/O pin (bank 3) |
| Pino 62 | I/O — User I/O pin (bank 3) |
| Pino 63 | GND — Ground |
| Pino 64 | I/O — User I/O pin (bank 3) |
| Pino 65 | I/O — User I/O pin (bank 3) |
| Pino 66 | I/O — User I/O pin (bank 3) |
| Pino 67 | I/O — User I/O pin (bank 3) |
| Pino 68 | I/O — User I/O pin (bank 3) |
| Pino 69 | VCCIO3 — I/O bank 3 supply (5 V) |
| Pino 70 | I/O — User I/O pin (bank 3) |
| Pino 71 | I/O — User I/O pin (bank 3) |
| Pino 72 | I/O — User I/O pin (bank 3) |
| Pino 73 | I/O — User I/O pin (bank 3) |
| Pino 74 | I/O — User I/O pin (bank 3) |
| Pino 75 | GND — Ground |
| Pino 76 | I/O — User I/O pin (bank 3) |
| Pino 77 | I/O — User I/O pin (bank 3) |
| Pino 78 | I/O — User I/O pin (bank 3) |
| Pino 79 | I/O — User I/O pin (bank 3) |
| Pino 80 | I/O — User I/O pin (bank 3) |
| Pino 81 | VCCINT — Internal core supply (5 V) |
| Pino 82 | I/O — User I/O pin (bank 4) |
| Pino 83 | I/O — User I/O pin (bank 4) |
| Pino 84 | I/O — User I/O pin (bank 4) |
| Pino 85 | I/O — User I/O pin (bank 4) |
| Pino 86 | I/O — User I/O pin (bank 4) |
| Pino 87 | GND — Ground |
| Pino 88 | I/O — User I/O pin (bank 4) |
| Pino 89 | I/O — User I/O pin (bank 4) |
| Pino 90 | I/O — User I/O pin (bank 4) |
| Pino 91 | I/O — User I/O pin (bank 4) |
| Pino 92 | I/O — User I/O pin (bank 4) |
| Pino 93 | VCCIO4 — I/O bank 4 supply (5 V) |
| Pino 94 | I/O — User I/O pin (bank 4) |
| Pino 95 | I/O — User I/O pin (bank 4) |
| Pino 96 | I/O — User I/O pin (bank 4) |
| Pino 97 | I/O — User I/O pin (bank 4) |
| Pino 98 | I/O — User I/O pin (bank 4) |
| Pino 99 | GND — Ground |
| Pino 100 | I/O — User I/O pin (bank 4) |
| Pino 101 | I/O — User I/O pin (bank 4) |
| Pino 102 | I/O — User I/O pin (bank 4) |
| Pino 103 | I/O — User I/O pin (bank 4) |
| Pino 104 | I/O — User I/O pin (bank 4) |
| Pino 105 | VCCINT — Internal core supply (5 V) |
| Pino 106 | I/O — User I/O pin (bank 5) |
| Pino 107 | I/O — User I/O pin (bank 5) |
| Pino 108 | I/O — User I/O pin (bank 5) |
| Pino 109 | I/O — User I/O pin (bank 5) |
| Pino 110 | I/O — User I/O pin (bank 5) |
| Pino 111 | GND — Ground |
| Pino 112 | I/O — User I/O pin (bank 5) |
| Pino 113 | I/O — User I/O pin (bank 5) |
| Pino 114 | I/O — User I/O pin (bank 5) |
| Pino 115 | I/O — User I/O pin (bank 5) |
| Pino 116 | I/O — User I/O pin (bank 5) |
| Pino 117 | VCCIO5 — I/O bank 5 supply (5 V) |
| Pino 118 | I/O — User I/O pin (bank 5) |
| Pino 119 | I/O — User I/O pin (bank 5) |
| Pino 120 | I/O — User I/O pin (bank 5) |
| Pino 121 | I/O — User I/O pin (bank 5) |
| Pino 122 | I/O — User I/O pin (bank 5) |
| Pino 123 | GND — Ground |
| Pino 124 | I/O — User I/O pin (bank 5) |
| Pino 125 | I/O — User I/O pin (bank 5) |
| Pino 126 | I/O — User I/O pin (bank 5) |
| Pino 127 | I/O — User I/O pin (bank 5) |
| Pino 128 | I/O — User I/O pin (bank 5) |
| Pino 129 | VCCINT — Internal core supply (5 V) |
| Pino 130 | I/O — User I/O pin (bank 6) |
| Pino 131 | I/O — User I/O pin (bank 6) |
| Pino 132 | I/O — User I/O pin (bank 6) |
| Pino 133 | I/O — User I/O pin (bank 6) |
| Pino 134 | I/O — User I/O pin (bank 6) |
| Pino 135 | GND — Ground |
| Pino 136 | I/O — User I/O pin (bank 6) |
| Pino 137 | I/O — User I/O pin (bank 6) |
| Pino 138 | I/O — User I/O pin (bank 6) |
| Pino 139 | I/O — User I/O pin (bank 6) |
| Pino 140 | I/O — User I/O pin (bank 6) |
| Pino 141 | VCCIO6 — I/O bank 6 supply (5 V) |
| Pino 142 | I/O — User I/O pin (bank 6) |
| Pino 143 | I/O — User I/O pin (bank 6) |
| Pino 144 | I/O — User I/O pin (bank 6) |
| Pino 145 | I/O — User I/O pin (bank 6) |
| Pino 146 | I/O — User I/O pin (bank 6) |
| Pino 147 | GND — Ground |
| Pino 148 | I/O — User I/O pin (bank 6) |
| Pino 149 | I/O — User I/O pin (bank 6) |
| Pino 150 | I/O — User I/O pin (bank 6) |
| Pino 151 | I/O — User I/O pin (bank 6) |
| Pino 152 | I/O — User I/O pin (bank 6) |
| Pino 153 | TDI — JTAG Test Data In (IEEE 1149.1) |
| Pino 154 | TMS — JTAG Test Mode Select |
| Pino 155 | TCK — JTAG Test Clock |
| Pino 156 | I/O — User I/O pin (bank 7) |
| Pino 157 | I/O — User I/O pin (bank 7) |
| Pino 158 | I/O — User I/O pin (bank 7) |
| Pino 159 | I/O — User I/O pin (bank 7) |
| Pino 160 | I/O — User I/O pin (bank 7) |
| Pino 161 | GND — Ground |
| Pino 162 | I/O — User I/O pin (bank 7) |
| Pino 163 | I/O — User I/O pin (bank 7) |
| Pino 164 | I/O — User I/O pin (bank 7) |
| Pino 165 | I/O — User I/O pin (bank 7) |
| Pino 166 | I/O — User I/O pin (bank 7) |
| Pino 167 | VCCIO7 — I/O bank 7 supply (5 V) |
| Pino 168 | I/O — User I/O pin (bank 7) |
| Pino 169 | I/O — User I/O pin (bank 7) |
| Pino 170 | I/O — User I/O pin (bank 7) |
| Pino 171 | I/O — User I/O pin (bank 7) |
| Pino 172 | I/O — User I/O pin (bank 7) |
| Pino 173 | GND — Ground |
| Pino 174 | I/O — User I/O pin (bank 7) |
| Pino 175 | I/O — User I/O pin (bank 7) |
| Pino 176 | I/O — User I/O pin (bank 7) |
| Pino 177 | I/O — User I/O pin (bank 7) |
| Pino 178 | I/O — User I/O pin (bank 7) |
| Pino 179 | VCCINT — Internal core supply (5 V) |
| Pino 180 | I/O — User I/O pin (bank 8) |
| Pino 181 | I/O — User I/O pin (bank 8) |
| Pino 182 | I/O — User I/O pin (bank 8) |
| Pino 183 | I/O — User I/O pin (bank 8) |
| Pino 184 | I/O — User I/O pin (bank 8) |
| Pino 185 | GND — Ground |
| Pino 186 | I/O — User I/O pin (bank 8) |
| Pino 187 | I/O — User I/O pin (bank 8) |
| Pino 188 | I/O — User I/O pin (bank 8) |
| Pino 189 | I/O — User I/O pin (bank 8) |
| Pino 190 | I/O — User I/O pin (bank 8) |
| Pino 191 | VCCIO8 — I/O bank 8 supply (5 V) |
| Pino 192 | I/O — User I/O pin (bank 8) |
| Pino 193 | I/O — User I/O pin (bank 8) |
| Pino 194 | I/O — User I/O pin (bank 8) |
| Pino 195 | I/O — User I/O pin (bank 8) |
| Pino 196 | I/O — User I/O pin (bank 8) |
| Pino 197 | GND — Ground |
| Pino 198 | I/O — User I/O pin (bank 8) |
| Pino 199 | I/O — User I/O pin (bank 8) |
| Pino 200 | I/O — User I/O pin (bank 8) |
| Pino 201 | I/O — User I/O pin (bank 8) |
| Pino 202 | I/O — User I/O pin (bank 8) |
| Pino 203 | TDO — JTAG Test Data Out (IEEE 1149.1) |
| Pino 204 | I/O — User I/O pin (bank 1) |
| Pino 205 | I/O — User I/O pin (bank 1) |
| Pino 206 | I/O — User I/O pin (bank 1) |
| Pino 207 | I/O — User I/O pin (bank 1) |
| Pino 208 | I/O — User I/O pin (bank 1) |
Aplicações típicas
EPF8820AQC208-3N é adequado para 6 aplicaçãos: Industrial Automation Control, Legacy Telecom Interface Cards, PCI Bus Bridge and Glue Logic Consolidation, Educational and Hobbyist Development Platforms, Parallel SRAM and FIFO Interface Controllers, Aerospace Avionics Legacy Spares.
Industrial Automation Control
The EPF8820AQC208-3N is well suited to industrial 5 V control backplanes because of its 152 user I/Os, 8K usable gates, and CMOS-SRAM in-circuit reconfigurability. Designers can integrate multiple 32-bit control buses, encoder counters, and PWM generators in a single FQFP-208 device, replacing 4-6 discrete 74-series logic packages. The 95 MHz -3 speed grade easily accommodates servo-loop update rates of 10-20 kHz with substantial timing margin. The 0-70 °C commercial temperature range covers most factory-floor enclosures, and the FLEX 8000 SRAM configuration supports field firmware updates over JTAG for serviceability.
Recomendado
Legacy Telecom Interface Cards
Legacy T1/E1 line cards and backplane multiplexers in telecom central offices deployed FLEX 8000 devices like the EPF8820AQC208-3N for HDLC framing, time-slot interchange, and alarm logic. The 5 V tolerant I/Os interface directly to vintage bus transceivers, while the 152 I/Os handle full E1 (32 time slots) plus overhead without external bus expander logic. The 672 LEs and 1,500 registers provide ample capacity for per-channel state machines, while the -3 speed grade's 7.9 ns multiplexer delay meets 8 kHz frame alignment budgets. In-circuit reconfigurability allowed carriers to deploy field-upgradeable firmware via JTAG without card swap.
Recomendado
PCI Bus Bridge and Glue Logic Consolidation
The EPF8820AQC208-3N's wide 152-I/O count and 8K-gate capacity made it a popular PCI bus bridge and glue-logic consolidator in late-1990s PC peripherals, RAID controllers, and add-in cards. It absorbed address decode, wait-state insertion, bus arbiter, and interrupt steering that previously consumed two to three CPLDs. The FQFP-208 footprint accommodates the 32-bit PCI AD bus plus control and parity signals without multiplexing, and the SRAM configuration supports vendor-specific BIOS updates. The 5 V core matches the PCI 5 V signaling environment, eliminating level shifters.
Recomendado
Educational and Hobbyist Development Platforms
Universities and engineering schools adopted the EPF8820AQC208-3N and its FLEX 8000 siblings for FPGA design courses in the late 1990s and early 2000s because Altera MAX+PLUS II and Quartus toolchains offered free student editions. The 8K-gate capacity exercises Verilog and VHDL design flows without overwhelming students, while the 152 I/Os interface conveniently to breadboard-friendly headers. The 5 V tolerance tolerates typical lab bench power supplies, and the SRAM configuration supports live in-lab re-iteration. Hobbyists today use surplus EPF8820AQC208-3N stock on FPGA retro-computing projects.
Recomendado
Parallel SRAM and FIFO Interface Controllers
The EPF8820AQC208-3N served as a flexible controller between microprocessors and parallel SRAM, FIFOs, and dual-port memories in DSP and image-processing subsystems. The 152 I/Os handle 32-bit data plus 24-bit address and full control without external bus expander logic, and the 672 LEs accommodate address-generation state machines and burst-mode controllers. The 7.9 ns multiplexer delay at the -3 speed grade ensures single-cycle memory access at clock rates up to 80 MHz. The SRAM configuration permits firmware revision without re-spinning the PCB during prototype bring-up.
Recomendado
Aerospace Avionics Legacy Spares
Military and commercial avionics programs built in the late 1990s often standardized on FLEX 8000 devices like the EPF8820AQC208-3N for ARINC 429 bus interfaces, flight-control redundant compute lanes, and display drivers. Despite its obsolete lifecycle status today, it remains on qualified parts lists for sustaining engineering of these long-lifecycle platforms. The 5 V tolerance, wide temperature headroom when derated, and proven reliability in fielded systems make it the only drop-in replacement for legacy flight hardware. Aerospace sustainment programs continue to procure tested lot stock through specialized brokers.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para EPF8820AQC208-3N — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | EPF8820AQC208-3 | EPF8820AQC208-2N | EPF8820AQC208-2 | EPF8820AQC208-4 | EPF8636AQC208-3 | EPF8636AQC208-4N |
|---|---|---|---|---|---|---|---|
| Brand | Altera | Altera | Altera | Altera | Altera | Altera | Altera |
| Package | FQFP-208 (PQFP-208) | FQFP-208 - same | FQFP-208 - same | FQFP-208 - same | FQFP-208 - same | FQFP-208 - same | FQFP-208 - same |
| Usable Gates | 8,000 | 8,000 | 8,000 | 8,000 | 8,000 | 6,000 | 6,000 |
| Logic Cells (LEs) | 672 | 672 | 672 | 672 | 672 | 432 | 432 |
| User I/Os | 152 | 152 | 152 | 152 | 152 | 152 | 152 |
| Supply Voltage | 5 V | 5 V | 5 V | 5 V | 5 V | 5 V | 5 V |
| Speed Grade | -3 (95 MHz counter) | -3 (95 MHz counter) | -2 (83 MHz counter) | -2 (83 MHz counter) | -4 (faster than -3) | -3 (95 MHz counter) | -4 (faster than -3) |
| Lead-Free Finish | No (N suffix) | Yes (no N suffix) | No (N suffix) | Yes | Yes | Yes | No (N suffix) |
| Operating Temperature | 0 °C to 70 °C | 0 °C to 70 °C | 0 °C to 70 °C | 0 °C to 70 °C | 0 °C to 70 °C | 0 °C to 70 °C | 0 °C to 70 °C |
Principais diferenciais
- Lead-free finish availability for RoHS compliance (vs EPF8820AQC208-3)
- Faster speed grade option in same FQFP-208 footprint (vs EPF8820AQC208-4)
- 50% more logic capacity than the EPF8636 family at the same footprint (vs EPF8636AQC208-3)
Notas de projeto
The EPF8820AQC208-3N requires a stable 5 V supply on both VCCINT and VCCIO pins. Decouple each VCCINT/VCCIO pin with a 0.1 µF ceramic capacitor placed within 5 mm of the package pin, and add bulk 10-47 µF tantalum or polymer capacitors at the supply entry to the board. During configuration, inrush current can momentarily exceed 500 mA; ensure the regulator has sufficient headroom. Power sequencing between VCCINT and VCCIO is not required, but both rails must reach 90% of nominal within 100 ms of power-up to prevent partial SRAM configuration errors.
Although the 0.42 µm CMOS process is not high-power, sustained configuration clocking at 95 MHz with all 152 I/Os toggling can dissipate 1-1.5 W. The FQFP-208 package has a θJA of approximately 35-40 °C/W on a standard 4-layer PCB, so junction temperature rise is 35-60 °C above ambient. For operation at the high end of the 0-70 °C commercial range, provide copper pours under and around the package and ensure at least 100 CFM airflow if mounted in a sealed enclosure. Forced-air cooling is rarely required but recommended for sustained 95 MHz operation in chassis above 50 °C ambient.
FQFP-208 has 0.5 mm pitch gull-wing leads. Use a 4-layer PCB with continuous GND plane under the device for return-current control and EMI suppression. Route all 152 user I/O signals on inner or outer layers with 50 Ω controlled impedance if any signal exceeds 50 MHz. Keep configuration traces (nCONFIG, nSTATUS, CONF_DONE, DCLK, DATA0) short and away from switching I/O to avoid false configuration triggers. Provide a JTAG header (TDI/TMS/TCK/TDO plus optional TRST) accessible at the board edge for in-system programming via Altera ByteBlaster or equivalent.
Common pitfalls: (1) Failing to configure the device on every power-up because SRAM configuration is volatile; (2) Driving I/O pins before configuration completes (will cause high-Icc latch-up); (3) Mixing 3.3 V peripherals on a 5 V VCCIO bank (the FLEX 8000 I/Os are 5 V tolerant but not 3.3 V-compliant); (4) Ignoring the -3 speed grade when budgeting timing - the 7.9 ns multiplexer delay must be added to clock-to-output paths; (5) Forgetting to assign unused I/O pins to 'input tri-stated' to minimize power and noise; (6) Using EPC1 (older) configuration devices without verifying compatibility with Quartus programmer output.
Informações de conformidade
EPF8820AQC208-3N carries the 'N' suffix indicating non-lead-free (leaded) finish per legacy Altera ordering codes; use the EPF8820AQC208-3 (no N) for RoHS-compliant builds. RoHS/REACH/AEC-Q100 status not explicitly listed in verified sources.