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