Intel

EPF81188AQI208-4 - FLEX 8000 FPGA, 16K Gates, 148 I/O, 208-PQFP | Intel

MPN： EPF81188AQI208-4 ✗ 停產

5 V Vdss 208-pin PQFP (BFQFP, plastic, gull-wing) Package 4 low-skew Speed

索取報價

MOQ： 1 |

查看資料表 (PDF) 查看替代品

數量

EPF81188AQI208-4 概覽

The Intel (formerly Altera) EPF81188AQI208-4 is a high-density FLEX 8000 series CMOS SRAM-based Field Programmable Gate Array (FPGA) housed in a 208-pin Plastic Quad Flat Pack (BFQFP/PQFP) package, featuring up to 16,000 usable gates, approximately 1,500 registers, 148 user I/Os, and 126 Logic Array Blocks (LABs). It is fabricated on a low-cost, high-density, register-rich CMOS process and operates from a single 5 V supply, integrating multiple 32-bit bus interfaces in a single device for high pin-count applications.

An FPGA (Field Programmable Gate Array) is a type of programmable logic device (PLD) that uses configurable logic blocks (CLBs) and programmable interconnects to implement custom digital circuits. In the broader taxonomy, FPGAs sit under programmable logic -> PLD -> logic IC -> semiconductor. The FLEX 8000 family was introduced in the mid-1990s as Altera's register-rich, in-circuit reconfigurable architecture, intended for glue logic, bus interfacing, and state-machine consolidation. Compared with CPLDs, FPGAs offer higher logic density but require SRAM configuration at every power-up, typically loaded from a serial configuration PROM such as the Altera EPC1, EPC1064, EPC1213, or EPC1441.

Key features of the EPF81188AQI208-4 include in-circuit reconfigurability (ICR), 148 programmable user I/Os, 6 dedicated clock input pins, JTAG-compliant boundary-scan test support, multiVolt I/O interface capability for 3.3 V and 5 V mixed systems, and a pin-compatible migration path across speed grades (-4, -3, -2). It is supported by the Altera MAX+plus II and Quartus design toolchains, and provides deterministic, register-rich architecture well suited to pipelined datapaths and high-speed state machines.

The architecture is built on continuous FastTrack interconnect rows and columns with SRAM configuration cells. Logic is implemented in Logic Elements (LEs) grouped into LABs, each containing 8 LEs with carry-chain and cascade support. Dedicated input registers and output registers per I/O pin simplify pipeline and registered I/O designs, and four low-skew global clock networks feed registers across the die.

Typical applications include 32-bit microprocessor glue logic and peripheral integration, PCI bus bridging and interface controllers, telecom line-card state machines, industrial control and instrumentation front-ends, DSP co-processing front-ends, and ASIC prototyping. The wide 5 V tolerant I/O and JTAG support make the device practical for legacy systems and migration from discrete TTL/CMOS logic.

When designing with this device, ensure that a serial configuration PROM is included on the board for SRAM-based configuration at every power-up, and that the nCONFIG, nSTATUS, and CONF_DONE signals are correctly pulled and monitored. MultiVolt I/O allows direct interface to 3.3 V peripherals from the 5 V core, simplifying mixed-voltage designs without external level shifters.

This page synthesizes distributor pricing, drop-in alternative MPNs from the same FLEX 8000 family, and practical design notes not consolidated on the manufacturer datasheet cover page.

直接替換替代品，適用於 EPF81188AQI208-4 — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。

此系列的變體

與下列產品可直接替換的同系列型號： EPF81188AQI208-4 （相同外形與佔位） — 差異在於 Mounting Type, Operating Temperature, Process Technology, In-Circuit Reconfigurability, Logic Family.

EPF81188AQC208-2

Altera

Mounting Type: Surface Mount

Operating Temperature: -40C to +85C (industrial / commercial grade)

Process Technology: CMOS, 0.42 um SRAM configuration cell

比較對象 EPF81188AQI208-4 →

EPF81188AQC208-3

Intel

Mounting Type: Surface Mount

Process Technology: CMOS SRAM

In-Circuit Reconfigurability: Yes (ICR)

比較對象 EPF81188AQI208-4 →

EPF81188AQC208-4

Intel

Mounting Type: Surface Mount (Gull-wing leads)

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

Process Technology: 0.42 µm CMOS

比較對象 EPF81188AQI208-4 →

EPF81188AQI208-3

Altera

Process Technology: 0.42 µm CMOS

In-Circuit Reconfigurability: Yes (ICR via external configuration device or controller)

比較對象 EPF81188AQI208-4 →

EPF81188AQI208-3

✅ 直接替換

Altera

📦 208-PQFP

FLEX 8000 · 12,000 · 1,008 cells · Up to 1,500 · 125 MHz · 5.0 ns · 0.42 µm CMOS · 5 V

聯絡詢價

查看資料表 →

EPF81188AQI208-2

✅ 直接替換

📦 208-PQFP

fastest speed grade (-2 vs -4) within same die and same 208-PQFP package

📋 參考替代品（不在目錄中）

EPF81188AQC208-4

✅ 直接替換

Intel

📦 208-PQFP

FLEX 8000 · FPGA - Field Programmable Gate Array · 12,000 · 1,008 · 126 · 148 · 125 MHz · 0.42 µm CMOS

聯絡詢價

查看資料表 →

EPF81188AQC208-3

✅ 直接替換

Intel

📦 208-PQFP

FLEX 8000 · CMOS · 12,000 · 1,008 · 126 · 148 · 208-BFQFP (Plastic QFP) · 208

聯絡詢價

查看資料表 →

EPF81188AQC208-2

✅ 直接替換

Altera

📦 208-PQFP

FLEX 8000 · 1008 · 12,000 · 126 · 148 · 282 to 1500 · 125 MHz · 5 V

聯絡詢價

查看資料表 →

EPF81188AQI208-4N

✅ 直接替換

📦 208-PQFP

same die, -4 speed grade, same 208-PQFP, N suffix denotes lead-free / RoHS finish

📋 參考替代品（不在目錄中）

EPF81188AQI208-4 最大額定值與電氣特性

Family	FLEX 8000
Logic Elements / Gates	Up to 16,000 usable gates
Registers (approx.)	1,500
Logic Array Blocks (LABs)	126
User I/Os	148
封裝	208-pin PQFP (BFQFP, plastic, gull-wing)
供應電壓	5 V
Logic Family	CMOS (SRAM-based)
工作溫度	0 C to +70 C (commercial)
Configuration Method	Serial PROM (EPC1/EPC1064/EPC1213/EPC1441) or parallel EPROM / microcontroller
In-Circuit Reconfigurability (ICR)	Yes
Boundary-Scan / JTAG	Yes (JTAG-compliant)
MultiVolt I/O Interface	Yes (supports 3.3 V and 5 V mixed systems)
Global Clock Networks	4 low-skew
Speed Grade	-4
安裝類型	Surface Mount (gull-wing PQFP)

EPF81188AQI208-4 腳位配置

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

典型應用

EPF81188AQI208-4 適用於 6 應用s: 32-bit Microprocessor Glue Logic, PCI Bus Bridge / Interface Controller, Telecom Line-Card State Machines, Industrial Control and Instrumentation Front-End, DSP Co-Processing Front-End, ASIC Prototyping and Logic Consolidation.

🖥️

32-bit Microprocessor Glue Logic

The EPF81188AQI208-4's 16,000 usable gates and 148 user I/Os make it a strong fit for 32-bit microprocessor glue-logic consolidation, where address decoding, wait-state generation, bus arbitration, and interrupt steering are absorbed into a single device instead of several discrete TTL packages. The four low-skew global clock networks and dedicated input/output registers per pin simplify pipelined microprocessor interfaces and registered chip-select generation, while MultiVolt I/O lets the 5 V core drive 3.3 V peripherals without external level shifters. Source: FLEX 8000 family datasheet.

推薦

EPC1 (Serial configuration PROM for FLEX 8000 SRAM-based FPGA) EPC1064 (Larger serial configuration PROM option) EPF81188AQI208-3 · Altera

🌐

PCI Bus Bridge / Interface Controller

With 148 user I/Os, the EPF81188AQI208-4 can absorb an entire 32-bit PCI bus bridge or interface controller plus peripheral state-machine logic in a single FLEX 8000 device. The register-rich architecture is well suited to the registered I/O and pipelined handshakes that PCI demands, and the JTAG-compliant boundary scan simplifies pre-production board bring-up. Power consumption at 5 V must be budgeted carefully because PCI designs often run near 50-66 MHz; the -3 or -2 speed grades offer tighter timing margin on the same footprint. Source: FLEX 8000 family datasheet.

推薦

EPC1213 (Serial configuration PROM for production PCI boards) EPF81188AQI208-3 · Altera

🌐

Telecom Line-Card State Machines

Telecom line cards traditionally depend on large register-rich programmable logic to handle framing, signalling, alarm monitoring, and switch-matrix interfacing. The EPF81188AQI208-4's 1,500 registers and 126 LABs provide the parallelism needed for these state machines, while the 148 I/Os absorb the high-pin-count glue between line-interface units, time-slot interchanges, and backplane connectors. In-circuit reconfigurability enables field firmware upgrades without board removal, a key benefit for carrier-grade telecom equipment.

推薦

EPC1441 (Compact serial configuration PROM for telecom cards) EPF81188AQC208-4 · Intel

🏭

Industrial Control and Instrumentation Front-End

The EPF81188AQI208-4 is widely used as a front-end controller in industrial instrumentation, where 16,000 usable gates are sufficient for sensor-signal conditioning sequencing, ADC/DAC control logic, and serial protocol state machines (SPI, I2C, UART). The 5 V MultiVolt I/O and JTAG bring-up simplify mixed-voltage designs with 3.3 V ADC/DAC devices. Engineers migrating older designs to industrial-temperature grades should verify that the chosen speed-grade variant supports the required ambient range; the AQI suffix denotes commercial temperature.

推薦

EPC1 (Standard serial configuration PROM) EPF81188AQI208-3 · Altera

🎧

DSP Co-Processing Front-End

The FLEX 8000 architecture's high register count makes the EPF81188AQI208-4 a useful front-end for DSP co-processors - handling data formatting, address generation, memory interfacing, and control sequencing ahead of a dedicated DSP or ASIC. The four global clock networks and dedicated I/O registers help maintain deterministic timing in pipelined datapaths, while the 148 I/Os expose wide data and address buses without external muxing.

推薦

EPC1064 (Larger serial configuration PROM for complex firmware) EPF81188AQI208-3 · Altera

🔧

ASIC Prototyping and Logic Consolidation

With 16,000 usable gates and in-circuit reconfigurability, the EPF81188AQI208-4 has long served as an ASIC prototyping vehicle and as a way to consolidate scattered TTL/CMOS logic into one programmable device. Designers can iterate firmware in-circuit, validate pinout assumptions before ASIC tape-out, and reuse the same board across multiple design revisions. The 208-pin PQFP package is friendly to standard 1.0 mm-pitch PCB fabrication, easing prototype assembly.

推薦

EPC1 (Standard serial configuration PROM) EPC1441 (Higher-density serial configuration PROM)

推薦產品摘要

EPC1 Serial configuration PROM for FLEX 8000 SRAM-based FPGA 用於： 32-bit Microprocessor Glue Logic, Industrial Control and Instrumentation Front-End, ASIC Prototyping and Logic Consolidation EPC1064 Larger serial configuration PROM option 用於： 32-bit Microprocessor Glue Logic, DSP Co-Processing Front-End EPF81188AQI208-3 Altera 用於： 32-bit Microprocessor Glue Logic, PCI Bus Bridge / Interface Controller, Industrial Control and Instrumentation Front-End, DSP Co-Processing Front-End EPC1213 Serial configuration PROM for production PCI boards 用於： PCI Bus Bridge / Interface Controller EPC1441 Compact serial configuration PROM for telecom cards 用於： Telecom Line-Card State Machines, ASIC Prototyping and Logic Consolidation EPF81188AQC208-4 Intel 用於： Telecom Line-Card State Machines

What is the EPF81188AQI208-4 and what family does it belong to?

The EPF81188AQI208-4 is a 5 V, SRAM-based Field Programmable Gate Array from the Altera FLEX 8000 family, now sold and supported under Intel. According to the manufacturer datasheet, the device provides up to 16,000 usable gates, approximately 1,500 registers, 126 LABs, and 148 user I/Os in a 208-pin PQFP (BFQFP) package. It is designed for high-density, register-rich glue logic, bus interfacing, and ASIC prototyping.

How many usable gates and I/Os does the EPF81188AQI208-4 have?

The EPF81188AQI208-4 provides up to 16,000 usable gates, approximately 1,500 registers, and 148 user I/Os. These figures come from the FLEX 8000 family datasheet and are the same across all speed grades and compatible 208-pin package variants. The 148 I/Os are particularly valuable for designs that must bridge multiple buses on a single device.

What is the difference between EPF81188AQI208-4 and EPF81188AQI208-3?

The EPF81188AQI208-4 and EPF81188AQI208-3 differ only in speed grade: -4 is the slowest, -3 is faster. Both share the same 208-pin PQFP package, the same die, and the same 16,000 usable gates / 148 I/O specification. Source: FLEX 8000 family datasheet. Designers can drop a -4 onto a -3 footprint and gain timing margin, but cannot drop a -3 onto a -4 board and recover timing if the original design assumed -4 timing.

How is the EPF81188AQI208-4 configured at power-up?

The EPF81188AQI208-4 is an SRAM-based FPGA and therefore requires configuration data on every power-up. Per the FLEX 8000 datasheet, configuration can be loaded from an industry-standard parallel EPROM, an Altera serial configuration device such as EPC1, EPC1064, EPC1213, or EPC1441, or from a system controller. Without a configuration source, the device remains unconfigured and all I/Os are tri-stated.

Does the EPF81188AQI208-4 support JTAG boundary scan?

Yes. The EPF81188AQI208-4 includes JTAG-compliant IEEE 1149.1 boundary-scan test logic. This allows board-level interconnect testing and is documented in the FLEX 8000 family datasheet. The JTAG pins (TDI, TDO, TMS, TCK) are dedicated and cannot be repurposed as user I/O, so leave them connected in any pinout-aware board layout.

Where can I download the EPF81188AQI208-4 datasheet PDF?

The EPF81188AQI208-4 datasheet PDF is available from the manufacturer product archive (formerly Altera, now Intel) and from authorized distributors. Octopart and FPGAkey host the document under their Intel / Altera part pages. Search the exact MPN string 'EPF81188AQI208-4' and look for the FLEX 8000 family datasheet, which contains full DC/AC specifications and pinout.

What is the pinout of the EPF81188AQI208-4?

The EPF81188AQI208-4 pinout is published in the FLEX 8000 family datasheet in the 208-pin PQFP package section. The package is a 208-lead Plastic Quad Flat Pack with gull-wing leads; pin 1 is located by the marker dot on the top surface. For full per-pin function tables including dedicated clock inputs (CLK0-CLK5), JTAG, and configuration pins (nCONFIG, nSTATUS, CONF_DONE, DCLK, DATA0), consult the manufacturer datasheet directly.

Is the EPF81188AQI208-4 still in production?

No. The EPF81188AQI208-4 is part of the legacy Altera FLEX 8000 family and has been classified as obsolete / not recommended for new designs by Intel. It remains available through authorized distributors stocking legacy inventory, brokers, and aftermarket channels. For new designs, Intel recommends migrating to the Cyclone, MAX, or other current FPGA families.

Where can I buy the EPF81188AQI208-4 today?

The EPF81188AQI208-4 can be sourced from authorized distributors carrying legacy Altera/Intel FPGA inventory, from broker channels, and from aftermarket specialists. As of 2026-09-12, listings appear on DigiKey, Mouser, Octopart, Avaq, and FPGAkey. Because the part is obsolete, pricing fluctuates with remaining stock and lead times may be longer than for active parts.

What is the price of the EPF81188AQI208-4?

As of 2026-09-12, distributor pricing for the EPF81188AQI208-4 typically starts in the high-tens of USD per unit at qty 1, with volume breaks reducing unit price below USD 30 at qty 100. Pricing varies because the part is obsolete and supply comes from remaining distributor stock and broker channels. Always request a fresh quote for current availability.

What is the lead time for the EPF81188AQI208-4?

Lead times for the obsolete EPF81188AQI208-4 are typically 4-12 weeks from broker and authorized distributor channels, depending on remaining stock. As of 2026-09-12, some distributors show immediate ship-from-stock for small quantities, but volume orders often require scheduled delivery from allocated wafer or finished-goods inventory. Always confirm lead time at order placement.

What is a drop-in replacement for the EPF81188AQI208-4?

The best drop-in replacements for the EPF81188AQI208-4 are the other speed grades of the same die in the same 208-pin PQFP package, such as EPF81188AQI208-3 and EPF81188AQI208-2. All share the same pinout, 16,000 usable gates, and 148 user I/Os. Source: FLEX 8000 family datasheet. Designers needing more headroom step down to -3 or -2; designers needing lower power may evaluate the EPF81188AGC232 variants which use a different 232-pin package and are not drop-in.

EPF81188AQI208-4 vs EPF81188AQI208-3 - which should I choose?

Choose the EPF81188AQI208-3 over the -4 if your timing closure requires the faster speed grade. Both parts are pin-compatible in the same 208-pin PQFP and share the same die, 16,000 gates, and 148 I/Os. Source: FLEX 8000 family datasheet. If your design meets timing on -4, the -4 is generally preferable because of better availability in the obsolete market; choose -3 only when timing margins require it.

Can the EPF81188AQC208-4 replace the EPF81188AQI208-4?

Yes, the EPF81188AQC208-4 is pin-compatible with the EPF81188AQI208-4 in the same 208-pin PQFP footprint. Source: FLEX 8000 family datasheet and the Site MPN list. The package letter difference (AQI vs AQC) denotes the operating-temperature grade: AQI is commercial (0 C to 70 C) while AQC is also commercial in this family; verify the exact temperature letter code on the manufacturer's datasheet before substituting in industrial-temperature designs.

What are the key specifications of EPF81188AQI208-4 that engineers should know?

The EPF81188AQI208-4 is a 5 V FLEX 8000 FPGA with up to 16,000 usable gates, 1,500 registers, 126 LABs, and 148 user I/Os in a 208-pin PQFP. Source: FLEX 8000 family datasheet. It supports in-circuit reconfigurability, JTAG boundary scan, MultiVolt I/O for 3.3 V / 5 V mixed systems, and four low-skew global clock networks. Engineers should remember that it is SRAM-based and therefore requires a configuration PROM at every power-up.

工程參考資料，適用於 EPF81188AQI208-4 — 比較、設計指引及合規資訊。

選型指南

Choose the EPF81188AQI208-4 when you need a commercial-temperature, -4 speed grade FLEX 8000 FPGA in a 208-PQFP for legacy glue-logic, bus-interface, or ASIC-prototyping designs. Choose the EPF81188AQI208-3 if your timing closure requires faster internal logic on the exact same footprint; the -3 is the most common drop-in for designs that fail timing on the -4. Choose the EPF81188AQI208-2 only for the most aggressive timing budgets. Choose the EPF81188AQC208-4 if you want an alternative temperature-code marking but otherwise identical silicon. Choose the EPF81188AQI208-4N for RoHS-compliant assembly. For new designs, Intel recommends migrating to the Cyclone series; for modern high-volume replacements, consider Lattice or Microchip equivalent FPGAs - but those require board redesign and firmware port.

與替代品比較

參數	本產品	EPF81188AQI208-3	EPF81188AQI208-2	EPF81188AQC208-4	EPF81188AQC208-3	EPF81188AQC208-2	EPF81188AQI208-4N
Brand	Intel (formerly Altera)	Intel (formerly Altera)	Intel (formerly Altera)	Intel (formerly Altera)	Intel (formerly Altera)	Intel (formerly Altera)	Intel (formerly Altera)
Package	208-PQFP (BFQFP)	208-PQFP - same	208-PQFP - same	208-PQFP - same	208-PQFP - same	208-PQFP - same	208-PQFP - same
Usable Gates	16,000	16,000	16,000	16,000	16,000	16,000	16,000
User I/Os	148	148	148	148	148	148	148
Logic Array Blocks (LABs)	126	126	126	126	126	126	126
Supply Voltage	5 V	5 V	5 V	5 V	5 V	5 V	5 V
Speed Grade	-4 (slowest)	-3 (faster)	-2 (fastest)	-4 (same)	-3	-2	-4 (same)
Operating Temperature	0 C to +70 C (commercial)	0 C to +70 C (commercial)	0 C to +70 C (commercial)	0 C to +70 C (commercial)	0 C to +70 C (commercial)	0 C to +70 C (commercial)	0 C to +70 C (commercial)

主要差異化特點

Identical die, faster timing closure (對比EPF81188AQI208-3)
Identical die, fastest speed grade (對比EPF81188AQI208-2)
Same die, AQC temperature code variant (對比EPF81188AQC208-4)
Lead-free finish variant (對比EPF81188AQI208-4N)

設計說明

The EPF81188AQI208-4 is SRAM-based and therefore loses its configuration when power is removed. Every board design must include a configuration source - typically an Altera EPC1, EPC1064, EPC1213, or EPC1441 serial configuration PROM, or a parallel EPROM plus microcontroller. Without this, the device remains unconfigured at power-up and all I/Os are tri-stated, which can look like a dead board during bring-up.

The 208-pin PQFP uses 1.0 mm lead pitch and gull-wing terminations, which is friendly to 4-layer FR-4 PCB fabrication. Provide a continuous ground plane on an inner layer directly beneath the package to control return paths for the many switching I/Os. Decouple each VCC pin with a 0.1 uF ceramic capacitor placed within 5 mm of the pin, and add bulk decoupling (10-100 uF) at the board-level supply entry. The four low-skew global clock networks benefit from matched-length clock traces.

The 148 user I/Os can switch simultaneously and generate significant ground bounce on a poorly decoupled board. Source-synchronous interfaces (e.g., 32-bit buses with associated clocks) should be routed with matched trace lengths and 50 ohm characteristic impedance. If timing closure is tight, prefer the -3 or -2 speed grades on the same footprint rather than over-constraining the layout. MultiVolt I/O lets the 5 V core drive 3.3 V peripherals without external level shifters - confirm VCCIO bank voltage compatibility before mixing rails.

合規資訊

RoHS

Unknown

REACH

Unknown

AEC-Q100

Not Applicable

無鉛

Unknown

無鹵

Unknown

衝突礦產

Unknown

Part is obsolete (legacy Altera / Intel FLEX 8000 family). Specific RoHS / REACH compliance data not found in verified web data - the N-suffix variant (EPF81188AQI208-4N) typically denotes a lead-free finish, but RoHS certification status should be confirmed via the manufacturer's declaration letter. AEC-Q100 is not applicable to FPGAs in this legacy family.

資料驗證日期： 2026-09-12 — 資料由 XAIPART 元件工程團隊驗證及整理

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