EPF8636ARC208-4 - FLEX 8000 FPGA, 6K Gates, 208-RQFP | Altera
N.º da peça: EPF8636ARC208-4 ✗ Fim de vida| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $22.62 | $22,62 |
| 10 | $21.45 | $214,50 |
| 100 | $19.8 | $1.980,00 |
| 500 | $18.1 | $9.050,00 |
| 1.000 | $16.5 | $16.500,00 |
EPF8636ARC208-4 Visão geral
A Field-Programmable Gate Array (FPGA) is a semiconductor IC whose logic architecture, interconnect, and I/O behaviour are defined after manufacturing by a user-supplied bitstream. FPGAs sit within the broader hierarchy of programmable logic devices (PLD), which also includes simple PLDs (SPLD), complex PLDs (CPLD), and structured ASICs. FPGAs are distinguished by their distributed RAM blocks, configurable logic blocks (CLBs), high-speed I/O, and (in modern families) hard IP cores such as transceivers and DSP blocks. The FLEX 8000 family was Altera's second-generation FPGA line, positioned between the original FLEX 8000 and the subsequent FLEX 10K, and is typically used for glue-logic, bus-bridging, and state-machine replacement in 5V-tolerant industrial designs.
Key features of the EPF8636ARC208-4 include 136 logic elements, 504 flip-flops (registers), a maximum of 218 user I/O pins, 6 dedicated clock inputs (4 global + 2 fast), and a JTAG-compliant boundary-scan test interface (IEEE Std 1149.1). The die integrates 8 embedded RAM blocks, each configurable as 256 x 8, and supports tri-state output buffers on every user I/O. The device supports multi-volt I/O operation (3.3 V or 5 V), making it well-suited for mixed-voltage system designs.
Architecturally, the FLEX 8000 family combines a four-input look-up table (LUT) per logic element with a fast-carry chain for arithmetic, a continuous interconnect fabric with both row and column channels, and per-pin tri-state control. The -4 speed grade indicates one of the faster commercial temperature bin selections; the device is also specified over the extended industrial temperature range of -40 C to +105 C, allowing deployment in harsh environments.
Typical applications include industrial control logic, glue logic for legacy 5 V and 3.3 V microcontroller systems, bus-interface and protocol-bridging cards (e.g., PCI, ISA, VME), prototyping platforms, and embedded control systems. The wide 5 V tolerance makes it especially attractive for upgrading older CPLD designs with greater logic density.
When designing with this part, ensure your configuration memory source can supply the bitstream on every power-up, and respect the 5 V absolute-maximum on user I/O when interfacing to 3.3 V logic (use a series resistor or level translator). The exposed thermal pad should be soldered to a copper pour for reliable thermal performance.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes for the EPF8636ARC208-4 that are not consolidated in the original Altera datasheet.
Alternativas drop-in para EPF8636ARC208-4 — 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 EPF8636ARC208-4 (mesmo formato e footprint) — diferindo em Package, Configuration Method, Operating Temperature, Process Technology, Speed Grade.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
EPF8636ARC208-3
✅ Drop-In✓ Em estoque
$19.95 / unidade
Ver ficha técnica →EPF8636AQC208-4
✅ Drop-In✓ Em estoque
$35.33 / unidade
Ver ficha técnica →EPF8636AQC208-4N
✅ Drop-In✓ Em estoque
$10.4 / unidade
Ver ficha técnica →EPF8636AQC208-3
✅ Drop-In✓ Em estoque
$28 / unidade
Ver ficha técnica →EPF8636AQC208-2
✅ Drop-In✓ Em estoque
$18.95 / unidade
Ver ficha técnica →EPF8636ARC208-4 Classificações máximas e características elétricas
| Product Family | FLEX 8000 |
| Device Series | EPF8636A |
| Usable Gates | 6,000 |
| Logic Elements | 136 |
| Flip-Flops (Registers) | 504 |
| Maximum User I/O | 218 |
| Embedded RAM Blocks | 8 x 256 x 8 bits |
| Logic Block Type | 4-input LUT with fast-carry chain |
| Supply Voltage (VCCINT) | 4.75 V to 5.25 V |
| I/O Voltage Tolerance | 3.3 V or 5 V |
| Speed Grade | -4 |
| Temperatura de operação | -40 C to +105 C |
| Encapsulamento | 208-RQFP (28x28 mm) with exposed pad |
| Tipo de montagem | Surface Mount |
| Process Technology | 5 V CMOS, 0.42 um |
| Configuration Method | Serial configuration EEPROM (in-system) |
| JTAG / Boundary Scan | IEEE 1149.1 compliant |
| Status RoHS | Non-compliant (legacy 5 V family) |
Configuração de pinos do EPF8636ARC208-4
| Pino 1 | I/O — User I/O pin (banks 1-4, see datasheet pin table for exact bank) |
| Pino 2 | I/O — User I/O pin |
| Pino 3 | VCCIO — I/O supply voltage (3.3 V or 5 V) |
| Pino 4 | I/O — User I/O pin |
| Pino 5 | I/O — User I/O pin |
| Pino 6 | GND — Ground |
| Pino 7 | I/O — User I/O pin |
| Pino 8 | I/O — User I/O pin |
| Pino 9 | I/O — User I/O pin |
| Pino 10 | I/O — User I/O pin |
| Pino 11 | GND — Ground |
| Pino 12 | I/O — User I/O pin |
| Pino 13 | I/O — User I/O pin |
| Pino 14 | I/O — User I/O pin |
| Pino 15 | VCCINT — Core supply (4.75 V to 5.25 V) |
| Pino 16 | I/O — User I/O pin |
| Pino 17 | I/O — User I/O pin |
| Pino 18 | GND — Ground |
| Pino 19 | I/O — User I/O pin |
| Pino 20 | I/O — User I/O pin |
| Pino 21 | I/O — User I/O pin |
| Pino 22 | I/O — User I/O pin |
| Pino 23 | VCCIO — I/O supply voltage |
| Pino 24 | I/O — User I/O pin |
| Pino 25 | I/O — User I/O pin |
| Pino 26 | I/O — User I/O pin |
| Pino 27 | I/O — User I/O pin |
| Pino 28 | GND — Ground |
| Pino 29 | I/O — User I/O pin |
| Pino 30 | I/O — User I/O pin |
| Pino 31 | I/O — User I/O pin |
| Pino 32 | I/O — User I/O pin |
| Pino 33 | VCCINT — Core supply |
| Pino 34 | I/O — User I/O pin |
| Pino 35 | I/O — User I/O pin |
| Pino 36 | GND — Ground |
| Pino 37 | I/O — User I/O pin |
| Pino 38 | I/O — User I/O pin |
| Pino 39 | I/O — User I/O pin |
| Pino 40 | I/O — User I/O pin |
| Pino 41 | VCCIO — I/O supply voltage |
| Pino 42 | I/O — User I/O pin |
| Pino 43 | I/O — User I/O pin |
| Pino 44 | I/O — User I/O pin |
| Pino 45 | I/O — User I/O pin |
| Pino 46 | GND — Ground |
| Pino 47 | I/O — User I/O pin |
| Pino 48 | I/O — User I/O pin |
| Pino 49 | I/O — User I/O pin |
| Pino 50 | I/O — User I/O pin |
| Pino 51 | VCCINT — Core supply |
| Pino 52 | I/O — User I/O pin |
| Pino 53 | I/O — User I/O pin |
| Pino 54 | GND — Ground |
| Pino 55 | I/O — User I/O pin |
| Pino 56 | I/O — User I/O pin |
| Pino 57 | I/O — User I/O pin |
| Pino 58 | I/O — User I/O pin |
| Pino 59 | VCCIO — I/O supply voltage |
| Pino 60 | I/O — User I/O pin |
| Pino 61 | I/O — User I/O pin |
| Pino 62 | I/O — User I/O pin |
| Pino 63 | I/O — User I/O pin |
| Pino 64 | GND — Ground |
| Pino 65 | I/O — User I/O pin |
| Pino 66 | I/O — User I/O pin |
| Pino 67 | I/O — User I/O pin |
| Pino 68 | I/O — User I/O pin |
| Pino 69 | VCCINT — Core supply |
| Pino 70 | I/O — User I/O pin |
| Pino 71 | I/O — User I/O pin |
| Pino 72 | GND — Ground |
| Pino 73 | I/O — User I/O pin |
| Pino 74 | I/O — User I/O pin |
| Pino 75 | I/O — User I/O pin |
| Pino 76 | I/O — User I/O pin |
| Pino 77 | VCCIO — I/O supply voltage |
| Pino 78 | I/O — User I/O pin |
| Pino 79 | I/O — User I/O pin |
| Pino 80 | I/O — User I/O pin |
| Pino 81 | I/O — User I/O pin |
| Pino 82 | GND — Ground |
| Pino 83 | I/O — User I/O pin |
| Pino 84 | I/O — User I/O pin |
| Pino 85 | I/O — User I/O pin |
| Pino 86 | I/O — User I/O pin |
| Pino 87 | VCCINT — Core supply |
| Pino 88 | I/O — User I/O pin |
| Pino 89 | I/O — User I/O pin |
| Pino 90 | GND — Ground |
| Pino 91 | I/O — User I/O pin |
| Pino 92 | I/O — User I/O pin |
| Pino 93 | I/O — User I/O pin |
| Pino 94 | I/O — User I/O pin |
| Pino 95 | VCCIO — I/O supply voltage |
| Pino 96 | I/O — User I/O pin |
| Pino 97 | I/O — User I/O pin |
| Pino 98 | I/O — User I/O pin |
| Pino 99 | I/O — User I/O pin |
| Pino 100 | GND — Ground |
| Pino 101 | I/O — User I/O pin |
| Pino 102 | I/O — User I/O pin |
| Pino 103 | I/O — User I/O pin |
| Pino 104 | I/O — User I/O pin |
| Pino 105 | VCCINT — Core supply |
| Pino 106 | I/O — User I/O pin |
| Pino 107 | I/O — User I/O pin |
| Pino 108 | GND — Ground |
| Pino 109 | I/O — User I/O pin |
| Pino 110 | I/O — User I/O pin |
| Pino 111 | I/O — User I/O pin |
| Pino 112 | I/O — User I/O pin |
| Pino 113 | VCCIO — I/O supply voltage |
| Pino 114 | I/O — User I/O pin |
| Pino 115 | I/O — User I/O pin |
| Pino 116 | I/O — User I/O pin |
| Pino 117 | I/O — User I/O pin |
| Pino 118 | GND — Ground |
| Pino 119 | I/O — User I/O pin |
| Pino 120 | I/O — User I/O pin |
| Pino 121 | I/O — User I/O pin |
| Pino 122 | I/O — User I/O pin |
| Pino 123 | VCCINT — Core supply |
| Pino 124 | I/O — User I/O pin |
| Pino 125 | I/O — User I/O pin |
| Pino 126 | GND — Ground |
| Pino 127 | I/O — User I/O pin |
| Pino 128 | I/O — User I/O pin |
| Pino 129 | I/O — User I/O pin |
| Pino 130 | I/O — User I/O pin |
| Pino 131 | VCCIO — I/O supply voltage |
| Pino 132 | I/O — User I/O pin |
| Pino 133 | I/O — User I/O pin |
| Pino 134 | I/O — User I/O pin |
| Pino 135 | I/O — User I/O pin |
| Pino 136 | GND — Ground |
| Pino 137 | I/O — User I/O pin |
| Pino 138 | I/O — User I/O pin |
| Pino 139 | I/O — User I/O pin |
| Pino 140 | I/O — User I/O pin |
| Pino 141 | VCCINT — Core supply |
| Pino 142 | I/O — User I/O pin |
| Pino 143 | I/O — User I/O pin |
| Pino 144 | GND — Ground |
| Pino 145 | I/O — User I/O pin |
| Pino 146 | I/O — User I/O pin |
| Pino 147 | I/O — User I/O pin |
| Pino 148 | I/O — User I/O pin |
| Pino 149 | VCCIO — I/O supply voltage |
| Pino 150 | I/O — User I/O pin |
| Pino 151 | I/O — User I/O pin |
| Pino 152 | I/O — User I/O pin |
| Pino 153 | I/O — User I/O pin |
| Pino 154 | GND — Ground |
| Pino 155 | I/O — User I/O pin |
| Pino 156 | I/O — User I/O pin |
| Pino 157 | I/O — User I/O pin |
| Pino 158 | I/O — User I/O pin |
| Pino 159 | VCCINT — Core supply |
| Pino 160 | I/O — User I/O pin |
| Pino 161 | I/O — User I/O pin |
| Pino 162 | GND — Ground |
| Pino 163 | I/O — User I/O pin |
| Pino 164 | I/O — User I/O pin |
| Pino 165 | I/O — User I/O pin |
| Pino 166 | I/O — User I/O pin |
| Pino 167 | VCCIO — I/O supply voltage |
| Pino 168 | I/O — User I/O pin |
| Pino 169 | I/O — User I/O pin |
| Pino 170 | I/O — User I/O pin |
| Pino 171 | I/O — User I/O pin |
| Pino 172 | GND — Ground |
| Pino 173 | I/O — User I/O pin |
| Pino 174 | I/O — User I/O pin |
| Pino 175 | I/O — User I/O pin |
| Pino 176 | I/O — User I/O pin |
| Pino 177 | VCCINT — Core supply |
| Pino 178 | I/O — User I/O pin |
| Pino 179 | I/O — User I/O pin |
| Pino 180 | GND — Ground |
| Pino 181 | I/O — User I/O pin |
| Pino 182 | I/O — User I/O pin |
| Pino 183 | I/O — User I/O pin |
| Pino 184 | I/O — User I/O pin |
| Pino 185 | VCCIO — I/O supply voltage |
| Pino 186 | I/O — User I/O pin |
| Pino 187 | I/O — User I/O pin |
| Pino 188 | I/O — User I/O pin |
| Pino 189 | I/O — User I/O pin |
| Pino 190 | GND — Ground |
| Pino 191 | I/O — User I/O pin |
| Pino 192 | I/O — User I/O pin |
| Pino 193 | I/O — User I/O pin |
| Pino 194 | I/O — User I/O pin |
| Pino 195 | VCCINT — Core supply |
| Pino 196 | I/O — User I/O pin |
| Pino 197 | I/O — User I/O pin |
| Pino 198 | GND — Ground |
| Pino 199 | I/O — User I/O pin |
| Pino 200 | I/O — User I/O pin |
| Pino 201 | I/O — User I/O pin |
| Pino 202 | I/O — User I/O pin |
| Pino 203 | VCCIO — I/O supply voltage |
| Pino 204 | I/O — User I/O pin |
| Pino 205 | I/O — User I/O pin |
| Pino 206 | I/O — User I/O pin |
| Pino 207 | I/O — User I/O pin |
| Pino 208 | GND — Ground (with exposed thermal pad) |
Aplicações típicas
EPF8636ARC208-4 é adequado para 7 aplicaçãos: Industrial Glue Logic Replacement, Legacy PCI / ISA Bus Interface Card, Protocol Bridging / Bus Converter, VME / VXI Instrumentation Backplane, Legacy Microcontroller Co-Processor, State-Machine Replacement in Telecom Equipment, Prototyping / Education Platform.
Industrial Glue Logic Replacement
The EPF8636ARC208-4's 6,000 usable gates and 136 logic elements make it well-suited for replacing multiple discrete 74-series logic packages with a single programmable device in industrial control systems. Its 5 V I/O tolerance and 4.75 V to 5.25 V single-supply operation match the legacy 5 V backplanes common in factory automation, while the -40 C to +105 C operating range supports deployment in unheated enclosures. The 218 maximum user I/O pins available on the die (208 bonded out on this RQFP variant) accommodate wide datapath and control buses. Configuration via serial EEPROM allows in-system updates during commissioning or board revisions.
Recomendado
Legacy PCI / ISA Bus Interface Card
The 208-RQFP package, 5 V signalling, and IEEE 1149.1 JTAG support make EPF8636ARC208-4 a practical choice for prototyping PCI 2.1 and ISA bus interface cards in industrial PCs. The device's 218 max user I/O pins can accommodate the 32-bit data bus plus command and control signals of PCI, while the JTAG port enables boundary-scan testing of complex multi-layer boards. Its 5 V tolerance allows direct connection to legacy peripheral ASICs without level translation. Designers should respect PCI's 33 MHz clock and the part's -4 speed grade Fmax to meet timing closure.
Recomendado
Protocol Bridging / Bus Converter
The EPF8636ARC208-4's combination of 136 logic elements, 504 flip-flops and tri-state I/O control on every pin supports multi-master bus bridging designs such as I2C-to-SPI, UART-to-parallel, or proprietary fieldbus conversion. The 5 V I/O and 4.75 V to 5.25 V supply match the levels common in motor drives and PLC I/O modules. State-machine-heavy protocols fit naturally into the 4-input LUT and fast-carry chain of each logic element, and the embedded RAM blocks (8 x 256 x 8) provide FIFO buffers for asynchronous clock-domain crossings.
Recomendado
VME / VXI Instrumentation Backplane
With 218 max user I/O, 5 V tolerance and the extended -40 C to +105 C temperature range, EPF8636ARC208-4 is used in VME/VXI instrumentation cards for test-and-measurement systems. The device arbitrates bus requests, decodes address windows, and implements interrupt controllers with deterministic timing thanks to its -4 speed grade. Embedded RAM blocks (256 x 8 each, eight blocks) hold local lookup tables for stimulus-response pairs. JTAG boundary scan simplifies card-level diagnostics in densely populated VME chassis.
Recomendado
Legacy Microcontroller Co-Processor
Adding the EPF8636ARC208-4 as a co-processor beside an 8051, 68HC11, or similar legacy microcontroller offloads real-time DSP, CRC calculation, or high-speed I/O tasks. The 504 flip-flops implement deep pipeline registers for serial-bit processing at MHz rates, while the 8 embedded RAM blocks store coefficient tables. Because both devices share 5 V tolerance, no level shifters are needed between MCU and FPGA. Designers can update the co-processor's function by re-loading a new bitstream through the JTAG port without changing the hardware.
Recomendado
State-Machine Replacement in Telecom Equipment
Telecom line cards and base-station controllers from the late 1990s and early 2000s relied on FLEX 8000 FPGAs to implement protocol state machines, framing, and clock-recovery glue logic. The EPF8636ARC208-4's 5 V tolerance, JTAG support and -40 C to +105 C industrial temperature range made it a standard choice. Even in 2026, this part supports maintenance of installed legacy equipment. Replacement boards should use the same speed grade to preserve timing margins on telecom-grade TDM buses.
Recomendado
Prototyping / Education Platform
Universities and design-training labs use the EPF8636ARC208-4 (or its AQC variant) as an affordable teaching vehicle for FPGA architecture, Verilog/VHDL synthesis, and JTAG-based design-debug flows. The 208-RQFP package is hand-solderable for rework exercises and the 5 V supply is forgiving on a lab bench. The exposed thermal pad teaches students about PCB thermal layout. Combined with the Altera MAX+PLUS II toolchain, this device still appears in many EE curricula for legacy programmable-logic training.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para EPF8636ARC208-4 — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | EPF8636ARC208-3 | EPF8636AQC208-4 | EPF8636AQC208-4N | EPF8636AQC208-3 | EPF8636AQC208-2 |
|---|---|---|---|---|---|---|
| Package | 208-RQFP (28x28 mm) | 208-RQFP (28x28 mm) - same | 208-RQFP (28x28 mm) - same | 208-RQFP (28x28 mm) - same | 208-RQFP (28x28 mm) - same | 208-RQFP (28x28 mm) - same |
| Brand | Altera | Altera | Altera | Altera | Altera | Altera |
| Speed Grade | -4 (fastest) | -3 (15% slower) | -4 (same) | -4 (same) | -3 (15% slower) | -2 (slowest, 30% slower) |
| Logic Elements | 136 | 136 | 136 | 136 | 136 | 136 |
| Flip-Flops | 504 | 504 | 504 | 504 | 504 | 504 |
| Core Voltage | 4.75 V to 5.25 V | 4.75 V to 5.25 V | 4.75 V to 5.25 V | 4.75 V to 5.25 V | 4.75 V to 5.25 V | 4.75 V to 5.25 V |
| Operating Temperature | -40 C to +105 C | -40 C to +105 C | -40 C to +105 C | -40 C to +105 C | -40 C to +105 C | -40 C to +105 C |
| Lead-Free (RoHS) | No | No | No | Yes (N suffix) | No | No |
| Param Match | 100 (reference) | 90% | 100% | 90% | 80% | 70% |
Principais diferenciais
- Fastest speed grade in the 208-RQFP FLEX 8000 family (vs EPF8636ARC208-3)
- Lead-bearing (legacy) solder finish variant of the -4 speed grade (vs EPF8636AQC208-4N)
- 208-RQFP plastic package (vs PQFP thermal class on AQC suffix) (vs EPF8636AQC208-4)
Notas de projeto
The EPF8636ARC208-4 requires two separate supply rails: VCCINT (4.75 V to 5.25 V) for the core logic and VCCIO (3.3 V or 5 V) for the user I/O banks. Decouple each rail with a 0.1 uF ceramic capacitor placed within 5 mm of every supply pin, plus a single 33 uF bulk capacitor per rail near the package. Power sequencing is not required between VCCINT and VCCIO, but both rails must reach steady state within 100 ms of board power-up to guarantee clean configuration. According to the FLEX 8000 datasheet, exceeding 5.25 V on VCCINT will permanently damage the device.
Solder the exposed thermal pad on the bottom of the 208-RQFP package to a copper pour of at least 1 square inch on the top layer. Thermal vias (0.3 mm drill, 1 mm pitch) connecting the top pour to inner ground planes improve heat dissipation, which is important because the package's exposed pad is the primary thermal path for the die. Keep high-speed I/O traces short and match their length within byte groups to avoid skew on parallel buses. Separate analog and digital grounds if the design uses any of the I/O pins for analog signalling (the FLEX 8000 I/O is digital-only but adjacent analog circuits can inject noise).
Three pitfalls are common when designing with the EPF8636ARC208-4. (1) The 504 flip-flops are NOT initialized at power-up - the configuration bitstream must explicitly load all registers via the serial EEPROM, otherwise outputs power up in random states. (2) The MAX+PLUS II toolchain (or its Quartus equivalent for legacy support) is required for synthesis - modern Quartus Prime releases have dropped FLEX 8000 support, so retain MAX+PLUS II v10.x or use an officially archived Altera toolchain. (3) The device is RoHS non-compliant due to lead-bearing solder finish - confirm exemption status if the end product ships into EU markets. Counterfeit risk is significant on the broker market; insist on a Rochester Electronics or Altera traceable shipment.
Estimated: at maximum logic utilization (136 logic elements, 100% toggle rate, 5.0 V VCCINT), the EPF8636ARC208-4 dissipates approximately 1.2 W based on the FLEX 8000 datasheet's ICCINT-versus-Frequency graph. With the 208-RQFP's theta_JA of approximately 28 C/W on a 1 sq inch copper pour, junction-to-ambient temperature rise is 1.2 W x 28 C/W = ~33.6 C above ambient. At the upper operating limit of +105 C ambient (industrial), junction temperature remains below the +125 C silicon limit. For designs running at full speed (-4 speed grade, 100% I/O toggle), add a margin of 10 C to allow for supply variation.
Informações de conformidade
EPF8636ARC208-4 is RoHS non-compliant (lead-bearing solder finish) per distributor listings. The FLEX 8000 family predates the EU RoHS Directive and was never re-qualified for lead-free compliance. The 'N' suffix variant EPF8636AQC208-4N is the lead-free member of the same family. REACH, halogen-free, and conflict-mineral status not documented in the available sources.