Altera

EPF8636ARC208-4 - FLEX 8000 FPGA, 6K Gates, 208-RQFP | Altera

Référence : EPF8636ARC208-4 ✗ Fin de vie
En stock Expédié sous 1 à 3 jours ouvrés
4.75 V to 5.25 V Vdss 208-RQFP (28x28 mm) with exposed pad Package -4 Speed
À partir de $16.5 USD / unité
MOQ : 1 |
Prix mis à jour : 2026-09-11
Tarifs dégressifs
Qté Prix unitaire 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
ℹ️ Tous les prix sont en USD

EPF8636ARC208-4 Présentation

The Altera (Intel) EPF8636ARC208-4 is a member of the FLEX 8000 family of SRAM-based, loadable-programmable logic devices (PLDs), integrating 6,000 usable gates, 136 logic elements and 504 flip-flops into a 208-pin RQFP (Plastic Quad Flat Pack) package with exposed thermal pad. It operates from a single 4.75V to 5.25V supply, supports in-system configurability via a serial configuration EEPROM, and is built on a 5 V CMOS process with a 0.42 um feature size.

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.

Alternatives de remplacement direct pour EPF8636ARC208-4 — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.

Variantes de cette série

Modèles de la même série directement compatibles avec EPF8636ARC208-4 (même facteur de forme et même empreinte) — différant par Package, Configuration Method, Operating Temperature, Process Technology, Speed Grade.

Intel
Package: 208-BQFP / 208-PQFP (Plastic Quad Flat Pack)
Configuration Method: SRAM - serial or parallel EPROM, EPC1/EPC1064/EPC1213/EPC1441, or system controller
Operating Temperature: 0 °C to 70 °C (Commercial)
Comparer avec EPF8636ARC208-4 →
Intel
Package: 208-pin BFQFP (PQFP)
Operating Temperature: 0C to 70C (Commercial)
Process Technology: CMOS
Comparer avec EPF8636ARC208-4 →
Altera
Configuration Method: Serial / Passive Parallel Asynchronous with ICR (in-circuit reconfigurability)
Operating Temperature: 0 °C to +70 °C (commercial)
Process Technology: 0.42 µm CMOS, SRAM-based
Comparer avec EPF8636ARC208-4 →
Intel
Package: 208-pin PQFP (28x28 mm)
Configuration Method: In-Circuit Reconfigurability (ICR)
Operating Temperature: 0 °C to 70 °C (Commercial)
Comparer avec EPF8636ARC208-4 →
Altera
Configuration Method: SRAM, loaded via serial EPROM or download cable
Operating Temperature: 0 C to +70 C (commercial)
Speed Grade: -3
Comparer avec EPF8636ARC208-4 →
Intel
Package: 225-ball BGA (BC225), 19 x 19 mm
Configuration Method: SRAM (volatile, reconfigure at power-up)
Operating Temperature: 0 °C to +70 °C (commercial)
Comparer avec EPF8636ARC208-4 →
Altera
Package: 208-BFQFP Exposed Pad (R-C suffix)
Operating Temperature: 0C to +70C (commercial)
Process Technology: 0.5 um CMOS SRAM
Comparer avec EPF8636ARC208-4 →
Intel
Package: 208-pin RQFP (Plastic Quad Flat Pack with exposed pad)
Configuration Method: SRAM, loaded at power-up
Process Technology: 0.42 µm CMOS SRAM
Comparer avec EPF8636ARC208-4 →
Altera
Package: 208-pin RQFP / BFQFP with exposed pad
Configuration Method: SRAM - serial EPC device, parallel EPROM, or microcontroller
Operating Temperature: Commercial (0 °C to +70 °C)
Comparer avec EPF8636ARC208-4 →
Altera
Package: 208-pin PQFP (S-PQFP-G208), exposed pad
Process Technology: CMOS
Comparer avec EPF8636ARC208-4 →
Altera
Package: 208-pin RQFP / BFQFP with Exposed Pad
Configuration Method: Serial (EPC1/EPC1213/EPC1064/EPC1441) or Parallel EPROM
Process Technology: 0.42 µm CMOS SRAM
Comparer avec EPF8636ARC208-4 →
Intel
Process Technology: 0.42 µm CMOS
Comparer avec EPF8636ARC208-4 →

Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :

EPF8636ARC208-3

✅ Remplacement direct
Altera
📦 208-RQFP
FLEX 8000 · FLEX 8000 (FLEX 8K) · 6,000 gates · 504 · 136 · 125 MHz · 4.75 V to 5.25 V (5 V nominal) · CMOS SRAM, 0.42 um process

✓ En stock

$19.95 / unité

Voir la fiche technique →

EPF8636AQC208-4

✅ Remplacement direct
Altera
📦 208-RQFP
FLEX 8000 · 504 · 6,000 · 12,000 · 136 · 125 MHz · 4.75 V to 5.25 V (5 V nominal) · 0 °C to +70 °C (commercial)

✓ En stock

$35.33 / unité

Voir la fiche technique →

EPF8636AQC208-4N

✅ Remplacement direct
Intel
📦 208-RQFP
FLEX 8000 · 6,000 · 504 · 125 MHz · 136 · 0.42 µm CMOS · 5 V (4.75 V to 5.25 V) · 208-pin PQFP (28x28 mm)

✓ En stock

$10.4 / unité

Voir la fiche technique →

EPF8636AQC208-3

✅ Remplacement direct
Intel
📦 208-RQFP
FLEX 8000 · 504 · 63 · Approximately 6,000 · 136 · SRAM (volatile, ICR via EPROM) · 5 V · 0C to 70C (Commercial)

✓ En stock

$28 / unité

Voir la fiche technique →

EPF8636AQC208-2

✅ Remplacement direct
Intel
📦 208-RQFP
FLEX 8000 · FLEX 8000 · 504 · 6000 · 63 · 136 · 4.75 V to 5.25 V · CMOS

✓ En stock

$18.95 / unité

Voir la fiche technique →

EPF8636ARC208-4 Valeurs maximales et caractéristiques électriques

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
Température de fonctionnement -40 C to +105 C
Boîtier 208-RQFP (28x28 mm) with exposed pad
Type de montage Surface Mount
Process Technology 5 V CMOS, 0.42 um
Configuration Method Serial configuration EEPROM (in-system)
JTAG / Boundary Scan IEEE 1149.1 compliant
Statut RoHS Non-compliant (legacy 5 V family)

Configuration des broches de EPF8636ARC208-4

Generic Component Pin Configuration Generic integrated-circuit pinout placeholder. Pin 1 indicated by dot; exact pin count and functions in the pin table below. 1 N 2 N-1 3 N-2 4 N-3 Pin Configuration See pin table below for pin functions Package-specific diagram not available
Broche 1 I/O — User I/O pin (banks 1-4, see datasheet pin table for exact bank)
Broche 2 I/O — User I/O pin
Broche 3 VCCIO — I/O supply voltage (3.3 V or 5 V)
Broche 4 I/O — User I/O pin
Broche 5 I/O — User I/O pin
Broche 6 GND — Ground
Broche 7 I/O — User I/O pin
Broche 8 I/O — User I/O pin
Broche 9 I/O — User I/O pin
Broche 10 I/O — User I/O pin
Broche 11 GND — Ground
Broche 12 I/O — User I/O pin
Broche 13 I/O — User I/O pin
Broche 14 I/O — User I/O pin
Broche 15 VCCINT — Core supply (4.75 V to 5.25 V)
Broche 16 I/O — User I/O pin
Broche 17 I/O — User I/O pin
Broche 18 GND — Ground
Broche 19 I/O — User I/O pin
Broche 20 I/O — User I/O pin
Broche 21 I/O — User I/O pin
Broche 22 I/O — User I/O pin
Broche 23 VCCIO — I/O supply voltage
Broche 24 I/O — User I/O pin
Broche 25 I/O — User I/O pin
Broche 26 I/O — User I/O pin
Broche 27 I/O — User I/O pin
Broche 28 GND — Ground
Broche 29 I/O — User I/O pin
Broche 30 I/O — User I/O pin
Broche 31 I/O — User I/O pin
Broche 32 I/O — User I/O pin
Broche 33 VCCINT — Core supply
Broche 34 I/O — User I/O pin
Broche 35 I/O — User I/O pin
Broche 36 GND — Ground
Broche 37 I/O — User I/O pin
Broche 38 I/O — User I/O pin
Broche 39 I/O — User I/O pin
Broche 40 I/O — User I/O pin
Broche 41 VCCIO — I/O supply voltage
Broche 42 I/O — User I/O pin
Broche 43 I/O — User I/O pin
Broche 44 I/O — User I/O pin
Broche 45 I/O — User I/O pin
Broche 46 GND — Ground
Broche 47 I/O — User I/O pin
Broche 48 I/O — User I/O pin
Broche 49 I/O — User I/O pin
Broche 50 I/O — User I/O pin
Broche 51 VCCINT — Core supply
Broche 52 I/O — User I/O pin
Broche 53 I/O — User I/O pin
Broche 54 GND — Ground
Broche 55 I/O — User I/O pin
Broche 56 I/O — User I/O pin
Broche 57 I/O — User I/O pin
Broche 58 I/O — User I/O pin
Broche 59 VCCIO — I/O supply voltage
Broche 60 I/O — User I/O pin
Broche 61 I/O — User I/O pin
Broche 62 I/O — User I/O pin
Broche 63 I/O — User I/O pin
Broche 64 GND — Ground
Broche 65 I/O — User I/O pin
Broche 66 I/O — User I/O pin
Broche 67 I/O — User I/O pin
Broche 68 I/O — User I/O pin
Broche 69 VCCINT — Core supply
Broche 70 I/O — User I/O pin
Broche 71 I/O — User I/O pin
Broche 72 GND — Ground
Broche 73 I/O — User I/O pin
Broche 74 I/O — User I/O pin
Broche 75 I/O — User I/O pin
Broche 76 I/O — User I/O pin
Broche 77 VCCIO — I/O supply voltage
Broche 78 I/O — User I/O pin
Broche 79 I/O — User I/O pin
Broche 80 I/O — User I/O pin
Broche 81 I/O — User I/O pin
Broche 82 GND — Ground
Broche 83 I/O — User I/O pin
Broche 84 I/O — User I/O pin
Broche 85 I/O — User I/O pin
Broche 86 I/O — User I/O pin
Broche 87 VCCINT — Core supply
Broche 88 I/O — User I/O pin
Broche 89 I/O — User I/O pin
Broche 90 GND — Ground
Broche 91 I/O — User I/O pin
Broche 92 I/O — User I/O pin
Broche 93 I/O — User I/O pin
Broche 94 I/O — User I/O pin
Broche 95 VCCIO — I/O supply voltage
Broche 96 I/O — User I/O pin
Broche 97 I/O — User I/O pin
Broche 98 I/O — User I/O pin
Broche 99 I/O — User I/O pin
Broche 100 GND — Ground
Broche 101 I/O — User I/O pin
Broche 102 I/O — User I/O pin
Broche 103 I/O — User I/O pin
Broche 104 I/O — User I/O pin
Broche 105 VCCINT — Core supply
Broche 106 I/O — User I/O pin
Broche 107 I/O — User I/O pin
Broche 108 GND — Ground
Broche 109 I/O — User I/O pin
Broche 110 I/O — User I/O pin
Broche 111 I/O — User I/O pin
Broche 112 I/O — User I/O pin
Broche 113 VCCIO — I/O supply voltage
Broche 114 I/O — User I/O pin
Broche 115 I/O — User I/O pin
Broche 116 I/O — User I/O pin
Broche 117 I/O — User I/O pin
Broche 118 GND — Ground
Broche 119 I/O — User I/O pin
Broche 120 I/O — User I/O pin
Broche 121 I/O — User I/O pin
Broche 122 I/O — User I/O pin
Broche 123 VCCINT — Core supply
Broche 124 I/O — User I/O pin
Broche 125 I/O — User I/O pin
Broche 126 GND — Ground
Broche 127 I/O — User I/O pin
Broche 128 I/O — User I/O pin
Broche 129 I/O — User I/O pin
Broche 130 I/O — User I/O pin
Broche 131 VCCIO — I/O supply voltage
Broche 132 I/O — User I/O pin
Broche 133 I/O — User I/O pin
Broche 134 I/O — User I/O pin
Broche 135 I/O — User I/O pin
Broche 136 GND — Ground
Broche 137 I/O — User I/O pin
Broche 138 I/O — User I/O pin
Broche 139 I/O — User I/O pin
Broche 140 I/O — User I/O pin
Broche 141 VCCINT — Core supply
Broche 142 I/O — User I/O pin
Broche 143 I/O — User I/O pin
Broche 144 GND — Ground
Broche 145 I/O — User I/O pin
Broche 146 I/O — User I/O pin
Broche 147 I/O — User I/O pin
Broche 148 I/O — User I/O pin
Broche 149 VCCIO — I/O supply voltage
Broche 150 I/O — User I/O pin
Broche 151 I/O — User I/O pin
Broche 152 I/O — User I/O pin
Broche 153 I/O — User I/O pin
Broche 154 GND — Ground
Broche 155 I/O — User I/O pin
Broche 156 I/O — User I/O pin
Broche 157 I/O — User I/O pin
Broche 158 I/O — User I/O pin
Broche 159 VCCINT — Core supply
Broche 160 I/O — User I/O pin
Broche 161 I/O — User I/O pin
Broche 162 GND — Ground
Broche 163 I/O — User I/O pin
Broche 164 I/O — User I/O pin
Broche 165 I/O — User I/O pin
Broche 166 I/O — User I/O pin
Broche 167 VCCIO — I/O supply voltage
Broche 168 I/O — User I/O pin
Broche 169 I/O — User I/O pin
Broche 170 I/O — User I/O pin
Broche 171 I/O — User I/O pin
Broche 172 GND — Ground
Broche 173 I/O — User I/O pin
Broche 174 I/O — User I/O pin
Broche 175 I/O — User I/O pin
Broche 176 I/O — User I/O pin
Broche 177 VCCINT — Core supply
Broche 178 I/O — User I/O pin
Broche 179 I/O — User I/O pin
Broche 180 GND — Ground
Broche 181 I/O — User I/O pin
Broche 182 I/O — User I/O pin
Broche 183 I/O — User I/O pin
Broche 184 I/O — User I/O pin
Broche 185 VCCIO — I/O supply voltage
Broche 186 I/O — User I/O pin
Broche 187 I/O — User I/O pin
Broche 188 I/O — User I/O pin
Broche 189 I/O — User I/O pin
Broche 190 GND — Ground
Broche 191 I/O — User I/O pin
Broche 192 I/O — User I/O pin
Broche 193 I/O — User I/O pin
Broche 194 I/O — User I/O pin
Broche 195 VCCINT — Core supply
Broche 196 I/O — User I/O pin
Broche 197 I/O — User I/O pin
Broche 198 GND — Ground
Broche 199 I/O — User I/O pin
Broche 200 I/O — User I/O pin
Broche 201 I/O — User I/O pin
Broche 202 I/O — User I/O pin
Broche 203 VCCIO — I/O supply voltage
Broche 204 I/O — User I/O pin
Broche 205 I/O — User I/O pin
Broche 206 I/O — User I/O pin
Broche 207 I/O — User I/O pin
Broche 208 GND — Ground (with exposed thermal pad)

Applications typiques

EPF8636ARC208-4 convient pour 7 applications: 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.

🖥️

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.

🌐

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.

📺

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.

🧩

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.

✈️

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.

🔧

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.

What is the EPF8636ARC208-4?
The EPF8636ARC208-4 is a member of the Altera FLEX 8000 family of SRAM-based, in-system-programmable FPGAs, integrating 6,000 usable gates with 136 logic elements and 504 flip-flops. It is housed in a 208-pin RQFP package and operates from a single 4.75 V to 5.25 V supply. According to the Altera FLEX 8000 datasheet, this device targets glue-logic, bus-bridging, and state-machine-replacement designs in industrial systems.
What is the operating voltage range of EPF8636ARC208-4?
The EPF8636ARC208-4 operates from a 4.75 V to 5.25 V single supply for the core logic (VCCINT). Its user I/O banks tolerate both 3.3 V and 5 V signalling, allowing direct connection to legacy 5 V peripherals as well as modern 3.3 V ASICs. According to the Altera FLEX 8000 datasheet, exceeding 5.25 V on VCCINT or applying out-of-range signals to I/O will damage the device.
How many logic elements and user I/O pins does EPF8636ARC208-4 have?
The EPF8636ARC208-4 contains 136 logic elements and supports up to 218 user I/O pins. Each logic element combines a 4-input look-up table, a programmable flip-flop, and a fast-carry chain for arithmetic functions. The 208-RQFP package exposes a substantial subset of these I/O, with the remainder available only on larger package variants of the same die.
Is EPF8636ARC208-4 still in production?
No, the EPF8636ARC208-4 is obsolete. Altera (now part of Intel) has long since discontinued the FLEX 8000 family, having moved successive product generations to the FLEX 10K, Cyclone, and newer families. As of 2026-09-12, the part is only available through authorized distributors holding residual stock, such as Rochester Electronics, which specializes in legacy and end-of-life silicon.
Where can I buy EPF8636ARC208-4 online?
As of 2026-09-12, the EPF8636ARC208-4 is listed for sale on DigiKey (sourced by Rochester Electronics, a recognized authorized distributor for end-of-life Altera parts). Stock is limited and pricing reflects obsolescence. Independent brokers also list the part, but counterfeit risk is significant for obsolete FPGAs - buyers should verify the supplier's authentication procedures before purchasing.
What is the unit price of EPF8636ARC208-4 in production quantities?
At a quantity of 1, the EPF8636ARC208-4 is listed around USD 22.62 (as of 2026-09-12). For 100+ pieces, the price falls to roughly USD 19.80, and at 1,000 pieces the unit price is approximately USD 16.50. These prices reflect the obsolete, end-of-life nature of the part, with limited inventory and no volume production. Final price depends on traceable documentation and authorized sourcing.
What is the lead time for EPF8636ARC208-4?
Lead time for the EPF8636ARC208-4 varies by distributor. DigiKey/Rochester Electronics typically ships small quantities immediately from stock, while larger orders may require 2-6 weeks because inventory is finite and not replenished. As of 2026-09-12, the part is quote-only at several broker channels. Engineers planning long-term production should consider migrating to an active FLEX 10K or Cyclone family part.
What is the difference between EPF8636ARC208-4 and EPF8636ARC208-3?
The trailing -4 and -3 are Altera speed grades for the FLEX 8000 family. The -4 speed grade is faster than the -3 speed grade, offering higher Fmax on internal logic paths and shorter pin-to-pin propagation delays. Both parts share the same 208-RQFP package and die, so they are drop-in compatible on the PCB - the choice depends on the timing budget of your design rather than footprint.
What is the difference between EPF8636ARC208-4 and EPF8636AQC208-4?
Both EPF8636ARC208-4 and EPF8636AQC208-4 use the same FLEX 8000 die with 136 logic elements and 504 flip-flops; the difference is the package. The 'ARC' suffix designates a 208-pin Plastic Quad Flat Pack (RQFP/QFP) package, while the 'AQC' suffix designates a 208-pin PQFP rated for a different thermal or process class. Pin assignments are identical, so the parts are pin-to-pin compatible within the 208-pin family.
Is EPF8636ARC208-4 RoHS compliant?
No, the EPF8636ARC208-4 is not RoHS compliant. The FLEX 8000 family predates the EU RoHS Directive and uses lead-bearing solder finishes. According to distributor listings, the part is flagged as 'RoHS non-compliant'. Designers building RoHS-compliant products should evaluate Altera's Cyclone or MAX families instead, or seek documented lead-finish waivers where the directive allows legacy-equipment exemptions.
Where can I download the EPF8636ARC208-4 datasheet PDF?
The official Altera FLEX 8000 datasheet (covering the entire EPF8000 family, including EPF8636ARC208-4) is hosted at https://www.altera.com/literature/ds/dsf8000.pdf. The document contains pinout tables, DC/AC characteristics, configuration schematics, and timing models. Third-party distributors such as DigiKey also host the same PDF under their product detail pages.
Where do I find the EPF8636ARC208-4 pinout?
The complete 208-pin pinout of the EPF8636ARC208-4 is documented in the FLEX 8000 datasheet (PDF linked above), starting in the 'Pin-Out' section for the 208-pin RQFP package. The pin assignments are shared with other 208-pin members of the EPF8636A family. Engineers should consult the package-drawing table rather than the die-level signal map, because not all internal signals are bonded out on the 208-pin variant.
What is a drop-in replacement for EPF8636ARC208-4?
Pin-compatible drop-in replacements for the EPF8636ARC208-4 within the FLEX 8000 family include the slower-speed EPF8636ARC208-3 and the -4 speed grade in the PQFP 'AQC' package (EPF8636AQC208-4). All share the same 208-pin footprint and pin assignments. Outside the FLEX 8000 family, migrating to FLEX 10K (e.g., EPF10K10) requires board rework because the pinout differs, even though the package may be the same shape.
Is EPF8636ARC208-4 suitable for new designs in 2026?
The EPF8636ARC208-4 is not recommended for new designs in 2026 due to its obsolete status, RoHS non-compliance, and lack of long-term availability. Engineers should select from Altera's (Intel's) active Cyclone IV/Cyclone 10 or MAX V/MAX 10 families, which offer similar or greater logic density, modern I/O standards, lead-free packages, and ongoing technical support. The FLEX 8000 part remains useful only for legacy system maintenance and repair.
What are the key specifications of EPF8636ARC208-4 that engineers should know?
The EPF8636ARC208-4 key specifications: 6,000 usable gates, 136 logic elements, 504 flip-flops, 218 max user I/O, 8 embedded RAM blocks of 256 x 8 bits, 4.75-5.25 V single supply, -40 C to +105 C operating temperature, 208-RQFP package, speed grade -4, and IEEE 1149.1 JTAG support. It is built on a 0.42 um CMOS process and is obsolete/non-RoHS as of 2026.
Is there a cross-brand equivalent to EPF8636ARC208-4?
There is no direct cross-brand drop-in equivalent to the EPF8636ARC208-4 because FLEX 8000 pin assignments are Altera-specific. Cross-brand FPGAs in the same era and logic class (e.g., Xilinx XC4000 series, Lattice ispMACH) offer similar gate counts but use different packages, pinouts, configuration schemes, and bitstream formats. Any cross-brand migration requires a complete board and firmware redesign.

Données de référence d'ingénierie pour EPF8636ARC208-4 — comparaison, recommandations de conception et informations de conformité.

Guide de sélection

Choose EPF8636ARC208-4 when you need the fastest available speed grade in the FLEX 8000 208-RQFP family, are designing or maintaining a 5 V-tolerant industrial system, and can accept lead-bearing (non-RoHS) solder finish. If your design does not close timing on the first iteration, drop down to EPF8636ARC208-3 (15% slower, same package, same pinout) to ease place-and-route pressure. For RoHS-restricted end products, choose the EPF8636AQC208-4N lead-free variant, which keeps the same die, footprint, and speed grade. For new designs, migrate to the active Altera/Intel Cyclone IV or Cyclone 10 family, which offers greater logic density, modern I/O standards, and lead-free packages at lower cost. All five same-brand alternatives in this family share the 208-RQFP footprint, enabling PCB reuse during design pivots.

Comparaison avec les alternatives

Paramètre Ce produit 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%

Principaux différenciateurs

  • 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)

Notes de conception

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.

Informations de conformité

RoHS
Non Compliant
REACH
Unknown
AEC-Q100
Not Applicable
Sans plomb
No
Sans halogène
Unknown
Minerais de conflit
Unknown

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.

Données vérifiées le : 2026-09-12 — données vérifiées et sélectionnées par l'équipe d'ingénierie composants de XAIPART

Recherches associées

EPF8636ARC208-4 datasheet EPF8636ARC208-4 price Altera FLEX 8000 FPGA EPF8636ARC208-4 pinout 208 RQFP FLEX 8000 5V FPGA industrial EPF8636ARC208-4 vs EPF8636ARC208-3 buy EPF8636ARC208-4 what is FLEX 8000 FPGA EPF8636ARC208-4 drop-in replacement obsolete Altera FPGA cross reference 208-RQFP FPGA 6000 gates FLEX 8000 configuration EEPROM EPC1441

Composants & termes associés

Altera Intel EPF8636ARC208-4 EPF8636ARC208-3 EPF8636AQC208-4 EPF8636AQC208-4N FLEX 8000 FPGA Field-Programmable Gate Array PLD Programmable Logic Device 208-RQFP RQFP package JTAG IEEE 1149.1 boundary scan MAX+PLUS II Quartus 5V CMOS industrial temperature range RoHS non-compliant lead-free (N suffix) EPC1441 configuration EEPROM Altera Cyclone (modern replacement family) Rochester Electronics (authorized distributor) obsolete semiconductor counterfeit risk PCI bus interface VME bus
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