Altera

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

部品番号: EPF8636ARC208-4 ✗ 生産終了

在庫あり 1〜3営業日以内に発送

4.75 V to 5.25 V Vdss 208-RQFP (28x28 mm) with exposed pad Package -4 Speed

開始価格 $16.5 USD / 個

MOQ: 1 |

価格更新日: 2026-09-11

ボリューム価格

数量	単価	小計
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 すべての価格はUSDです

データシートを見る (PDF) 代替品を見る

数量

EPF8636ARC208-4 概要

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.

ドロップイン代替品: EPF8636ARC208-4 — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。

このシリーズのバリエーション

同一シリーズでドロップイン互換のモデル: EPF8636ARC208-4 （同一形状・フットプリント） — 相違点: Package, Configuration Method, Operating Temperature, Process Technology, Speed Grade.

EPF8636AQC208-2

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)

比較対象 EPF8636ARC208-4 →

EPF8636AQC208-3

Intel

Package: 208-pin BFQFP (PQFP)

Operating Temperature: 0C to 70C (Commercial)

Process Technology: CMOS

比較対象 EPF8636ARC208-4 →

EPF8636AQC208-4

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

比較対象 EPF8636ARC208-4 →

EPF8636AQC208-4N

Intel

Package: 208-pin PQFP (28x28 mm)

Configuration Method: In-Circuit Reconfigurability (ICR)

Operating Temperature: 0 °C to 70 °C (Commercial)

比較対象 EPF8636ARC208-4 →

EPF8636ARC208-3

Altera

Configuration Method: SRAM, loaded via serial EPROM or download cable

Operating Temperature: 0 C to +70 C (commercial)

Speed Grade: -3

比較対象 EPF8636ARC208-4 →

EPF8820ABC225-4

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)

比較対象 EPF8636ARC208-4 →

EPF8820ARC-4

Altera

Package: 208-BFQFP Exposed Pad (R-C suffix)

Operating Temperature: 0C to +70C (commercial)

Process Technology: 0.5 um CMOS SRAM

比較対象 EPF8636ARC208-4 →

EPF8820ARC-4N

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

比較対象 EPF8636ARC208-4 →

EPF8820ARC208-2

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)

比較対象 EPF8636ARC208-4 →

EPF8820ARC208-2H

Altera

Package: 208-pin PQFP (S-PQFP-G208), exposed pad

Process Technology: CMOS

比較対象 EPF8636ARC208-4 →

EPF8820ARC208-2N

Altera

Package: 208-pin RQFP / BFQFP with Exposed Pad

Configuration Method: Serial (EPC1/EPC1213/EPC1064/EPC1441) or Parallel EPROM

✅ ドロップイン

Intel

📦 208-RQFP

FLEX 8000 · FLEX 8000 · 504 · 6000 · 63 · 136 · 4.75 V to 5.25 V · CMOS

✓ 在庫あり

$18.95 / 個

データシートを見る →

EPF8636ARC208-4 最大定格＆電気的特性

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
動作温度	-40 C to +105 C
パッケージ	208-RQFP (28x28 mm) with exposed pad
実装タイプ	Surface Mount
Process Technology	5 V CMOS, 0.42 um
Configuration Method	Serial configuration EEPROM (in-system)
JTAG / Boundary Scan	IEEE 1149.1 compliant
RoHS ステータス	Non-compliant (legacy 5 V family)

EPF8636ARC208-4 ピン構成

ピン 1	I/O — User I/O pin (banks 1-4, see datasheet pin table for exact bank)
ピン 2	I/O — User I/O pin
ピン 3	VCCIO — I/O supply voltage (3.3 V or 5 V)
ピン 4	I/O — User I/O pin
ピン 5	I/O — User I/O pin
ピン 6	GND — Ground
ピン 7	I/O — User I/O pin
ピン 8	I/O — User I/O pin
ピン 9	I/O — User I/O pin
ピン 10	I/O — User I/O pin
ピン 11	GND — Ground
ピン 12	I/O — User I/O pin
ピン 13	I/O — User I/O pin
ピン 14	I/O — User I/O pin
ピン 15	VCCINT — Core supply (4.75 V to 5.25 V)
ピン 16	I/O — User I/O pin
ピン 17	I/O — User I/O pin
ピン 18	GND — Ground
ピン 19	I/O — User I/O pin
ピン 20	I/O — User I/O pin
ピン 21	I/O — User I/O pin
ピン 22	I/O — User I/O pin
ピン 23	VCCIO — I/O supply voltage
ピン 24	I/O — User I/O pin
ピン 25	I/O — User I/O pin
ピン 26	I/O — User I/O pin
ピン 27	I/O — User I/O pin
ピン 28	GND — Ground
ピン 29	I/O — User I/O pin
ピン 30	I/O — User I/O pin
ピン 31	I/O — User I/O pin
ピン 32	I/O — User I/O pin
ピン 33	VCCINT — Core supply
ピン 34	I/O — User I/O pin
ピン 35	I/O — User I/O pin
ピン 36	GND — Ground
ピン 37	I/O — User I/O pin
ピン 38	I/O — User I/O pin
ピン 39	I/O — User I/O pin
ピン 40	I/O — User I/O pin
ピン 41	VCCIO — I/O supply voltage
ピン 42	I/O — User I/O pin
ピン 43	I/O — User I/O pin
ピン 44	I/O — User I/O pin
ピン 45	I/O — User I/O pin
ピン 46	GND — Ground
ピン 47	I/O — User I/O pin
ピン 48	I/O — User I/O pin
ピン 49	I/O — User I/O pin
ピン 50	I/O — User I/O pin
ピン 51	VCCINT — Core supply
ピン 52	I/O — User I/O pin
ピン 53	I/O — User I/O pin
ピン 54	GND — Ground
ピン 55	I/O — User I/O pin
ピン 56	I/O — User I/O pin
ピン 57	I/O — User I/O pin
ピン 58	I/O — User I/O pin
ピン 59	VCCIO — I/O supply voltage
ピン 60	I/O — User I/O pin
ピン 61	I/O — User I/O pin
ピン 62	I/O — User I/O pin
ピン 63	I/O — User I/O pin
ピン 64	GND — Ground
ピン 65	I/O — User I/O pin
ピン 66	I/O — User I/O pin
ピン 67	I/O — User I/O pin
ピン 68	I/O — User I/O pin
ピン 69	VCCINT — Core supply
ピン 70	I/O — User I/O pin
ピン 71	I/O — User I/O pin
ピン 72	GND — Ground
ピン 73	I/O — User I/O pin
ピン 74	I/O — User I/O pin
ピン 75	I/O — User I/O pin
ピン 76	I/O — User I/O pin
ピン 77	VCCIO — I/O supply voltage
ピン 78	I/O — User I/O pin
ピン 79	I/O — User I/O pin
ピン 80	I/O — User I/O pin
ピン 81	I/O — User I/O pin
ピン 82	GND — Ground
ピン 83	I/O — User I/O pin
ピン 84	I/O — User I/O pin
ピン 85	I/O — User I/O pin
ピン 86	I/O — User I/O pin
ピン 87	VCCINT — Core supply
ピン 88	I/O — User I/O pin
ピン 89	I/O — User I/O pin
ピン 90	GND — Ground
ピン 91	I/O — User I/O pin
ピン 92	I/O — User I/O pin
ピン 93	I/O — User I/O pin
ピン 94	I/O — User I/O pin
ピン 95	VCCIO — I/O supply voltage
ピン 96	I/O — User I/O pin
ピン 97	I/O — User I/O pin
ピン 98	I/O — User I/O pin
ピン 99	I/O — User I/O pin
ピン 100	GND — Ground
ピン 101	I/O — User I/O pin
ピン 102	I/O — User I/O pin
ピン 103	I/O — User I/O pin
ピン 104	I/O — User I/O pin
ピン 105	VCCINT — Core supply
ピン 106	I/O — User I/O pin
ピン 107	I/O — User I/O pin
ピン 108	GND — Ground
ピン 109	I/O — User I/O pin
ピン 110	I/O — User I/O pin
ピン 111	I/O — User I/O pin
ピン 112	I/O — User I/O pin
ピン 113	VCCIO — I/O supply voltage
ピン 114	I/O — User I/O pin
ピン 115	I/O — User I/O pin
ピン 116	I/O — User I/O pin
ピン 117	I/O — User I/O pin
ピン 118	GND — Ground
ピン 119	I/O — User I/O pin
ピン 120	I/O — User I/O pin
ピン 121	I/O — User I/O pin
ピン 122	I/O — User I/O pin
ピン 123	VCCINT — Core supply
ピン 124	I/O — User I/O pin
ピン 125	I/O — User I/O pin
ピン 126	GND — Ground
ピン 127	I/O — User I/O pin
ピン 128	I/O — User I/O pin
ピン 129	I/O — User I/O pin
ピン 130	I/O — User I/O pin
ピン 131	VCCIO — I/O supply voltage
ピン 132	I/O — User I/O pin
ピン 133	I/O — User I/O pin
ピン 134	I/O — User I/O pin
ピン 135	I/O — User I/O pin
ピン 136	GND — Ground
ピン 137	I/O — User I/O pin
ピン 138	I/O — User I/O pin
ピン 139	I/O — User I/O pin
ピン 140	I/O — User I/O pin
ピン 141	VCCINT — Core supply
ピン 142	I/O — User I/O pin
ピン 143	I/O — User I/O pin
ピン 144	GND — Ground
ピン 145	I/O — User I/O pin
ピン 146	I/O — User I/O pin
ピン 147	I/O — User I/O pin
ピン 148	I/O — User I/O pin
ピン 149	VCCIO — I/O supply voltage
ピン 150	I/O — User I/O pin
ピン 151	I/O — User I/O pin
ピン 152	I/O — User I/O pin
ピン 153	I/O — User I/O pin
ピン 154	GND — Ground
ピン 155	I/O — User I/O pin
ピン 156	I/O — User I/O pin
ピン 157	I/O — User I/O pin
ピン 158	I/O — User I/O pin
ピン 159	VCCINT — Core supply
ピン 160	I/O — User I/O pin
ピン 161	I/O — User I/O pin
ピン 162	GND — Ground
ピン 163	I/O — User I/O pin
ピン 164	I/O — User I/O pin
ピン 165	I/O — User I/O pin
ピン 166	I/O — User I/O pin
ピン 167	VCCIO — I/O supply voltage
ピン 168	I/O — User I/O pin
ピン 169	I/O — User I/O pin
ピン 170	I/O — User I/O pin
ピン 171	I/O — User I/O pin
ピン 172	GND — Ground
ピン 173	I/O — User I/O pin
ピン 174	I/O — User I/O pin
ピン 175	I/O — User I/O pin
ピン 176	I/O — User I/O pin
ピン 177	VCCINT — Core supply
ピン 178	I/O — User I/O pin
ピン 179	I/O — User I/O pin
ピン 180	GND — Ground
ピン 181	I/O — User I/O pin
ピン 182	I/O — User I/O pin
ピン 183	I/O — User I/O pin
ピン 184	I/O — User I/O pin
ピン 185	VCCIO — I/O supply voltage
ピン 186	I/O — User I/O pin
ピン 187	I/O — User I/O pin
ピン 188	I/O — User I/O pin
ピン 189	I/O — User I/O pin
ピン 190	GND — Ground
ピン 191	I/O — User I/O pin
ピン 192	I/O — User I/O pin
ピン 193	I/O — User I/O pin
ピン 194	I/O — User I/O pin
ピン 195	VCCINT — Core supply
ピン 196	I/O — User I/O pin
ピン 197	I/O — User I/O pin
ピン 198	GND — Ground
ピン 199	I/O — User I/O pin
ピン 200	I/O — User I/O pin
ピン 201	I/O — User I/O pin
ピン 202	I/O — User I/O pin
ピン 203	VCCIO — I/O supply voltage
ピン 204	I/O — User I/O pin
ピン 205	I/O — User I/O pin
ピン 206	I/O — User I/O pin
ピン 207	I/O — User I/O pin
ピン 208	GND — Ground (with exposed thermal pad)

主な用途

EPF8636ARC208-4 の用途: 7 件s: 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.

おすすめ

EPC1441PC8 · Altera EPF10K10 (Higher-density migration path (FLEX 10K family))

🖥️

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.

おすすめ

EPF8636ARC208-3 · Altera EPC1441PC8 · Altera

🌐

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.

おすすめ

EPF8636AQC208-4 · Altera EPF8636AQC208-4N · Intel

📺

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.

おすすめ

EPF8636ARC208-4 · Altera EPC1441PC8 · Altera

🧩

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.

おすすめ

EPF8636ARC208-3 · Altera EPC1441PC8 · Altera

✈️

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.

おすすめ

EPF8636AQC208-4 · Altera EPF10K10 (Higher-density migration target for new telecom designs)

🔧

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.

おすすめ

EPC1441PC8 · Altera EPF8636ARC208-3 · Altera

おすすめ製品の概要

EPC1441PC8 Altera 使用用途: Industrial Glue Logic Replacement, Legacy PCI / ISA Bus Interface Card, VME / VXI Instrumentation Backplane, Legacy Microcontroller Co-Processor, Prototyping / Education Platform EPF10K10 Higher-density migration path (FLEX 10K family) 使用用途: Industrial Glue Logic Replacement, State-Machine Replacement in Telecom Equipment EPF8636ARC208-3 Altera 使用用途: Legacy PCI / ISA Bus Interface Card, Legacy Microcontroller Co-Processor, Prototyping / Education Platform EPF8636AQC208-4 Altera 使用用途: Protocol Bridging / Bus Converter, State-Machine Replacement in Telecom Equipment EPF8636AQC208-4N Intel 使用用途: Protocol Bridging / Bus Converter EPF8636ARC208-4 Altera 使用用途: VME / VXI Instrumentation Backplane

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.

エンジニアリング参考データ: EPF8636ARC208-4 — 比較、設計ガイダンス、コンプライアンス情報。

選定ガイド

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.

代替品との比較

パラメータ	この製品	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%

主な差別化要因

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)

設計ノート

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.

コンプライアンス情報

RoHS

Non Compliant

REACH

Unknown

AEC-Q100

Not Applicable

鉛フリー

ハロゲンフリー

Unknown

紛争鉱物

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.

データ検証日: 2026-09-12 — データはXAIPARTの部品エンジニアリングチームによって検証・管理されています

出典: Distributor, Octopart, Distributor, Distributor, Manufacturer Datasheet