EPF81188AQI208-4 - FLEX 8000 FPGA, 16K Gates, 148 I/O, 208-PQFP | Intel
MPN: EPF81188AQI208-4 β End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $38.5 | $38.50 |
| 10 | $34.2 | $342.00 |
| 100 | $29.75 | $2,975.00 |
| 250 | $27.4 | $6,850.00 |
| 500 | $25.1 | $12,550.00 |
Drop-in alternatives for EPF81188AQI208-4 β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
EPF81188AQI208-3
β Drop-Inβ In Stock
$45 / Unit
View Datasheet βEPF81188AQI208-2
β Drop-Inπ Reference alternative (not in catalog)
EPF81188AQC208-4
β Drop-Inβ In Stock
$62 / Unit
View Datasheet βEPF81188AQC208-3
β Drop-Inβ In Stock
$14.2 / Unit
View Datasheet βEPF81188AQC208-2
β Drop-Inβ In Stock
$21.5 / Unit
View Datasheet βEPF81188AQI208-4N
β Drop-Inπ Reference alternative (not in catalog)
EPF81188AQI208-4 Maximum Ratings & Electrical Characteristics
| 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 |
| Package | 208-pin PQFP (BFQFP, plastic, gull-wing) |
| Supply Voltage | 5 V |
| Logic Family | CMOS (SRAM-based) |
| Operating Temperature | 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 |
| Mounting Type | Surface Mount (gull-wing PQFP) |
EPF81188AQI208-4 Pin Configuration
| Pin 1 | I/O β User I/O pin (per pinout table in datasheet) |
| Pin 2 | I/O β User I/O pin |
| Pin 3 | I/O β User I/O pin |
| Pin 4 | I/O β User I/O pin |
| Pin 5 | I/O β User I/O pin |
| Pin 6 | VCC β 5 V core supply |
| Pin 7 | I/O β User I/O pin |
| Pin 8 | I/O β User I/O pin |
| Pin 9 | I/O β User I/O pin |
| Pin 10 | GND β Ground |
| Pin 11 | I/O β User I/O pin |
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| Pin 22 | GND β Ground |
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| Pin 31 | I/O β User I/O pin |
| Pin 32 | VCC β 5 V core supply |
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| Pin 44 | GND β Ground |
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| Pin 56 | VCC β 5 V core supply |
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| Pin 68 | GND β Ground |
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| Pin 80 | VCC β 5 V core supply |
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| Pin 92 | GND β Ground |
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| Pin 104 | VCC β 5 V core supply |
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| Pin 116 | GND β Ground |
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| Pin 128 | VCC β 5 V core supply |
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| Pin 140 | GND β Ground |
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| Pin 152 | VCC β 5 V core supply |
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| Pin 164 | GND β Ground |
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| Pin 175 | I/O β User I/O pin |
| Pin 176 | VCC β 5 V core supply |
| Pin 177 | I/O β User I/O pin |
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| Pin 188 | GND β Ground |
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| Pin 199 | I/O β User I/O pin |
| Pin 200 | VCC β 5 V core supply |
| Pin 201 | I/O β User I/O pin |
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Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this digital IC. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
EPF81188AQI208-4 is suitable for 6 applications: 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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
Recommended Products Summary
Engineering reference data for EPF81188AQI208-4 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | 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) |
| RoHS / Lead-Free | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | Lead-free (N suffix typically denotes lead-free finish) |
Key Differentiators
- Identical die, faster timing closure (vs EPF81188AQI208-3)
- Identical die, fastest speed grade (vs EPF81188AQI208-2)
- Same die, AQC temperature code variant (vs EPF81188AQC208-4)
- Lead-free finish variant (vs EPF81188AQI208-4N)
Design Notes
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.
Compliance Information
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.
