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EP20K400FI784-2 - 400K Gate APEX 20K FPGA, 784-BGA | Altera
EP20K400FI784-2

EP20K400FI784-2 - 400K Gate APEX 20K FPGA, 784-BGA | Altera

The Altera EP20K400FI784-2 is a member of the APEX 20K family of programmable logic devices (PLDs), delivering approximately 400,000 typical gates in a 784-ball FineLine BGA package. Operating from a nominal 2.5 V core supply (2.375 V min, 2.625 V max) and supporting industrial-grade -40 °C to +100 °C temperatures, the device integrates embedded system blocks (ESBs) for memory and arithmetic functions alongside a look-up-table (LUT)-based logic fabric. The FineLine BGA-784 package has a 1.000 mm ball pitch and is supplied in a Speed Grade -2 variant (tuned timing closure).

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EP20K400FI784-3 - APEX 20K 400K Gates 784-BGA FPGA | Intel
EP20K400FI784-3

EP20K400FI784-3 - APEX 20K 400K Gates 784-BGA FPGA | Intel

The Intel EP20K400FI784-3 is a member of the APEX 20K programmable logic device family, delivering up to 400,000 typical gates in a 784-ball Plastic Ball Grid Array (PBGA) package. It operates from a nominal 2.5 V supply (2.375 V to 2.625 V) with industrial temperature range of -40 °C to +100 °C, and is built on a 0.18 µm CMOS process with SRAM-based look-up table (LUT) and embedded MegaFunction blocks. An FPGA (Field-Programmable Gate Array) is a semiconductor integrated circuit built around an array of configurable logic blocks (CLBs), programmable interconnect, and I/O cells that can be re-programmed after manufacturing. APEX 20K combines logic, memory, and high-speed I/O on a single die, making it a precursor to modern system-on-chip FPGAs. Within the broader taxonomy, the EP20K400FI784-3 belongs to: FPGA -> Programmable Logic -> Logic IC -> Integrated Circuit -> Semiconductor. Key features include up to 400K typical gates (approx. 16,640 logic elements), 4 dedicated inputs, on-chip PLL for clock management, multi-standard I/O support, and embedded system blocks (ESBs) usable as dual-port RAM, FIFO, or CAM. The 784-ball PBGA package has a 1.000 mm terminal pitch, 2.7000 mm seated height maximum, and plastic/epoxy body material. The architecture uses SRAM configuration cells that must be loaded from an external configuration device on every power-up. Speed grade -3 denotes the slowest of the three commercial/industrial grades offered in this family, trading Fmax for the lowest price position. The device supports 3.3 V, 32-bit PCI, LVTTL, LVCMOS, SSTL, and GTL+ I/O standards via flexible I/O banks. Typical applications include telecommunications line cards, industrial control and automation, ASIC prototyping, and high-speed data acquisition front-ends. The embedded memory and DSP-friendly MegaFunction blocks make the device well-suited for pre-silicon validation of complex digital systems. When designing with the EP20K400FI784-3, ensure a stable 2.5 V core supply with proper decoupling and that the configuration EPROM is sized appropriately for the bitstream. Speed grade -3 is recommended only when timing closure is comfortably met; choose -2 or -1 if the design approaches Fmax limits. This page synthesizes distributor availability, drop-in same-family alternatives, and practical design guidance beyond what is captured in the original APEX 20K datasheet.

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EP20K400GC652-1XV - 400K Gate APEX 20K FPGA | Altera | BGA-652
EP20K400GC652-1XV

EP20K400GC652-1XV - 400K Gate APEX 20K FPGA | Altera | BGA-652

The Altera EP20K400GC652-1XV is a high-density APEX 20K family Field Programmable Gate Array (FPGA) implementing approximately 400,000 system gates in a thermally-enhanced 652-pin BGA package. It pairs a MultiCore architecture with 1664 logic elements (Macros), 212,992 bits of embedded SRAM, and 502 user I/O pins for high-bandwidth system-on-a-programmable-chip (SOPC) integration. Operating from a 2.5 V core supply, it offers 2.5 ns propagation delay suitable for high-performance datapath, telecom, and DSP front-end designs. An FPGA (Field Programmable Gate Array) is a semiconductor device built around an array of configurable logic blocks (CLBs), embedded memory, and programmable interconnect that can be reconfigured by the end user after manufacture. FPGAs occupy the upper tier of programmable logic devices (PLDs) — above SPLDs and CPLDs — and below mask-programmed ASICs in density and NRE cost. They are widely used for ASIC prototyping, glue logic, accelerator offload, and low-to-mid volume custom compute where mask NRE is not amortizable. The APEX 20K family specifically introduced MultiCore integration of look-up tables, product-term logic, and embedded memory in a single fabric, enabling true SOPC designs on a single programmable die. Key features include 1664 Macros, 212,992 bits of embedded SRAM, 502 user I/O pins, JTAG-based in-system programmability via IEEE 1149.1, and a thermally-enhanced BGA-652 package. The -1 speed grade designates the standard performance bin within the APEX 20K 1.8 V/2.5 V core family, and the 'V' suffix marks RoHS-compliant lead-free assembly. The MultiCore architecture combines look-up-table (LUT) logic, embedded array blocks (EABs) for memory, and FastTrack continuous routing interconnect, allowing designers to allocate logic, memory, and DSP on a per-region basis. With up to 212 Kbits of distributed and block RAM, large FIFO buffers and datapath registers can be implemented on-chip, removing external memory bottlenecks in many datapath and telecom designs. Typical applications include telecommunications line-card glue logic, DSP co-processing and bus interfacing, ASIC prototyping for system-on-chip designs, image and video processing front-ends, and industrial control backplanes. The 502 user I/O pins provide abundant connectivity for parallel bus standards, memory interfaces, and LVDS signalling. When designing with this device, ensure the PCB land pattern follows JEDEC BGA-652 recommendations, provide a minimum of four PCB layers with dedicated power and ground planes, and use Altera's Quartus II design software (legacy support) or compatible third-party synthesis for place-and-route. Decoupling must follow Altera's recommended capacitor network to limit core-rail transients during simultaneous-switching output events. This page synthesizes distributor pricing, drop-in alternatives from the same APEX 20K family, and practical design notes not found in the standalone manufacturer datasheet, giving engineers a single reference for evaluation and procurement.

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EP20K400GC655-1 - 400K Gate APEX 20K FPGA, 655-pin CPGA | Intel/Altera
EP20K400GC655-1

EP20K400GC655-1 - 400K Gate APEX 20K FPGA, 655-pin CPGA | Intel/Altera

The Intel/Altera EP20K400GC655-1 is a 400,000-gate member of the APEX 20K programmable logic device family, integrating 16,640 logic elements and 212,992 RAM bits in a 655-pin Ceramic Pin Grid Array (CPGA) package. Speed grade -1 corresponds to a maximum internal clock frequency of 250 MHz on a 0.22 µm CMOS process, with a 2.5 V core supply. An FPGA (Field Programmable Gate Array) is a programmable logic device that combines LUT-based logic, product-term logic, and embedded memory blocks on a single die. The APEX 20K series was the industry's first PLD family to integrate MultiCore architecture that fuses look-up table logic with embedded system blocks, enabling true system-on-a-programmable-chip (SOPC) integration. Within the broader taxonomy, the EP20K400 sits at the intersection of FPGA, programmable logic device (PLD), and system-on-chip integration - bridging discrete logic and ASIC-class functionality. Key features include up to 502 user I/O pins, 4 embedded system blocks (ESBs) totaling 212,992 bits of RAM, a 32-bit FastTrack interconnect routing fabric, and JTAG-compliant IEEE 1149.1 boundary-scan test support. The device supports in-system programmability via passive serial, passive parallel asynchronous, and passive parallel synchronous configuration modes, with optional EPC configuration devices. The EP20K400 uses 0.22 µm CMOS technology on a 2.5 V core with 3.3 V I/O compatibility, providing a propagation delay as low as 2.5 ns. The MultiCore architecture enables designers to instantiate LUT-based logic, product-term logic, and dual-port RAM within the same device, eliminating the need for separate glue logic and memory chips. Typical applications include telecommunications infrastructure (SONET/SDH framer ICs, ATM switching), high-speed data acquisition, DSP preprocessing, encryption engines, and industrial control systems. The large gate count and embedded memory make the EP20K400 suitable for designs that would otherwise require multiple discrete FPGAs or ASICs. When designing with the EP20K400GC655-1, plan power sequencing to bring the 2.5 V core up before or simultaneously with I/O banks to avoid latch-up. The ceramic CPGA package requires careful thermal management - consider forced-air cooling for sustained junction temperatures above 100 °C, and use socketed mounting for prototyping with the through-hole pin grid. This page synthesizes distributor availability, same-family drop-in alternatives from the Site MPN library, and practical design notes not found in the manufacturer's datasheet - giving engineers a single source for sourcing and second-source decisions on legacy APEX 20K designs.

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EP20K400GC655-1V - APEX 20KE FPGA 400K Gates | Altera
EP20K400GC655-1V

EP20K400GC655-1V - APEX 20KE FPGA 400K Gates | Altera

The Altera (now Intel) EP20K400GC655-1V is a high-density APEX 20KE family Field-Programmable Gate Array (FPGA) integrating 400,000 gates, 16,640 logic elements, and 212,992 bits of embedded memory in a 655-ball Ceramic Ball Grid Array (CBGA655) package. The device operates from a 1.8 V core supply with LVDS-compatible I/O, supports 496 user I/O pins plus 6 dedicated inputs, and is built on a 0.18 µm CMOS process with MultiCore architecture combining look-up table (LUT) logic, product-term logic, and embedded memory blocks. An FPGA (Field-Programmable Gate Array) is a semiconductor device whose logic functionality is defined after manufacturing by the user, placing it in the broader hierarchy: programmable logic device (PLD) -> FPGA -> complex programmable logic device (CPLD) -> logic IC -> integrated circuit. The APEX 20KE family is Altera's second-generation MultiCore architecture targeting system-on-a-programmable-chip (SOPC) integration, allowing designers to combine soft processor cores, dedicated multipliers, memory, and high-speed I/O on a single die. Key features include 16,640 logic elements, 212,992 RAM bits distributed across embedded array blocks (EABs), dedicated FastTrack routing, support for LVDS I/O, in-system programmability via the IEEE 1532 boundary-scan interface, and a -1V speed grade targeting clock frequencies up to 250 MHz. The CBGA655 ceramic package supports high-reliability industrial and military temperature grades and is rated for a peak reflow temperature of 220 °C per the JEDEC J-STD-020 surface-mount standard. Architecturally the EP20K400GC655-1V separates logic into MegaLAB structures that group 16 Logic Array Blocks (LABs), each containing 10 Logic Elements (LEs), with embedded array blocks (EABs) for wide memory functions and product-term array blocks for arithmetic. This hybrid LUT/product-term/memory fabric is unique to the APEX 20K series and offers higher effective density than pure-LUT competitors of the same era. Typical applications include telecommunications line cards, industrial control and motor drives, military and avionics signal processing, medical imaging front-ends, and high-performance ASIC prototyping where 400K gates of custom logic are required. The wide I/O count (496 pins) makes it suitable for parallel bus architectures, multi-channel data acquisition, and protocol bridging. When designing with this part, plan JTAG programming into the PCB layout (TCK, TMS, TDI, TDO plus VCCIO/GND), follow Intel/Altera AN-140 multi-volt I/O guidelines, and confirm Quartus II or MAX+PLUS II toolchain support for the -1V speed grade in your design flow. Ceramic BGA substrates also require controlled soldering profiles and X-ray inspection of solder joints. This page aggregates distributor pricing, drop-in same-package alternatives, and design notes for the EP20K400GC655-1V, helping engineers evaluate supply and second-source options that the original datasheet does not present in one place.

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EP20K400GC655-1X - 400K-Gate APEX 20K FPGA | Altera
EP20K400GC655-1X

EP20K400GC655-1X - 400K-Gate APEX 20K FPGA | Altera

The Altera EP20K400GC655-1X is an APEX 20K family field-programmable gate array (FPGA) with 400K gates, 16,640 logic elements, and 496 user I/O lines, specified for 250 MHz system operation and packaged in a 655-pin ceramic pin grid array (CPGA). It is a CMOS programmable logic device with a 2.5V core supply and 2.5V/3.3V I/O supply capability, and the verified web data reports a 2.5ns propagation delay and 6 dedicated inputs. An FPGA is a semiconductor device containing configurable logic blocks and programmable interconnects that the designer reconfigures after manufacturing. The EP20K400GC655-1X belongs to the hierarchy FPGA -> programmable logic device -> integrated circuit, and sits inside Altera APEX 20K family, which was one of the first programmable logic families intended for system-on-a-programmable-chip integration. Key features of this device include 400K usable gates, 16,640 logic elements, 496 available outputs, 6 dedicated inputs, a high-density 655-pin ceramic package, and support for 2.5V and mixed 2.5/3.3V supply environments. Its MultiCore architecture combines look-up table logic, product-term logic, and embedded memory, which lets the same FPGA handle register-intensive data paths, combinatorial control logic, and memory functions within one device. Fabricated with 0.22um CMOS technology and capable of 250MHz system frequencies, the EP20K400GC655-1X provides a large amount of legacy FPGA fabric for applications that require many parallel I/O signals in a ceramic package. Typical uses include networking and telecom line-card control logic, aerospace and defense signal processing, ASIC prototyping, high-performance instrumentation, and industrial control systems. When designing with this part, pay close attention to the separate 2.5V core and 2.5/3.3V I/O supply rails, decouple the ceramic PGA socket properly, and plan for a configuration device or JTAG download because FPGA configuration data is volatile. This page synthesizes distributor availability, drop-in family alternatives, and practical design notes that are not compiled in one place by datasheet archives, providing engineers a single source for replacement and lifecycle planning.

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EP20K400GC655-2 - 400K Gates APEX-20KC FPGA 655-BCPGA | Altera
EP20K400GC655-2

EP20K400GC655-2 - 400K Gates APEX-20KC FPGA 655-BCPGA | Altera

The Altera (now Intel) EP20K400GC655-2 is a member of the APEX-20KC® family of SRAM-based, multi-vendor I/O FPGAs, integrating 400,000 system gates, 16,640 logic elements (cells), and 212,992 bits of embedded memory into a 655-pin ceramic pin grid array (CPGA) measuring 62.48 x 62.48 mm. It is fabricated on a 0.22 µm CMOS process, runs at a maximum internal frequency of 200 MHz, and is specified with a -2 speed grade offering faster timing closure than -1, with the part delivering state-of-the-art 3.1 ns CPGA655 pin-to-pin response time for high-throughput datapaths. Core supply voltage is 2.5 V with MultiVolt I/O supporting 1.71 V to 1.89 V for LVDS-compatible interfaces. An FPGA (Field Programmable Gate Array) is a semiconductor device built around an array of configurable logic blocks (CLBs), programmable interconnect, and I/O cells, allowing hardware designers to implement arbitrary digital logic that is re-programmable in the field. FPGAs sit hierarchically between simple programmable logic devices (PALs, GALs, CPLDs) and fixed-function ASICs, and APEX-20KC devices occupy the high-density end of that hierarchy by combining LUT-based logic, product-term logic, and embedded system blocks (ESBs) that double as dual-port RAM, CAM, or ROM. Key differentiating specifications include MultiCore™ architecture integrating LUT logic, product-term logic, and embedded memory in a single fabric; high-speed LVDS I/O pairs for chip-to-chip serial links; 4 PLLs for clock conditioning and skew management; and embedded CAM for high-speed table lookup. The MultiVolt I/O interface allows direct connection to 1.8 V, 2.5 V, and 3.3 V buses without external level shifters, simplifying mixed-voltage board design. Typical applications include telecommunications line cards, custom DSP datapaths, network protocol bridging, and embedded control for industrial automation where deterministic logic and high I/O count outweigh the cost of an ASIC. The ceramic CPGA package is preferred for high-reliability and military-temperature programs because of its hermeticity and superior thermal performance over plastic BGAs. When designing with this device, allocate at least four PCB layers for controlled-impedance routing, provide decoupling of 0.1 µF + 10 µF near every VCCINT/VCCIO pin pair, and configure unused I/O pins as tri-state inputs with internal pull-up to minimize leakage. Because the APEX-20KC family has been EOL'd by Intel, plan second-source or migration to Cyclone/Stratix equivalents early in the design cycle. This page synthesizes distributor pricing, pin-compatible same-family alternatives, and practical design notes not consolidated in the original APEX-20KC datasheet - useful for engineers maintaining legacy systems or qualifying alternate sources under PCN constraints.

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EP20K400GC655-2N - APEX 20KC FPGA 400K Gates | Intel/Altera
EP20K400GC655-2N

EP20K400GC655-2N - APEX 20KC FPGA 400K Gates | Intel/Altera

The Intel (formerly Altera) EP20K400GC655-2N is a member of the APEX 20KC programmable logic device family, delivering 400,000 system gates and 16,640 logic elements in a 655-pin ceramic pin-grid array (CPGA) package. It integrates 212,992 bits of embedded RAM and operates with a core supply of 1.71V to 1.89V (1.8V nominal) using 0.22 µm process technology. An FPGA (Field-Programmable Gate Array) is a semiconductor integrated circuit containing an array of configurable logic blocks (CLBs), embedded memory, I/O elements, and routing resources that the user programs after manufacture. FPGAs occupy a specific tier in the programmable logic hierarchy: they sit between fixed-function ASICs (high NRE, high volume) and CPLDs (smaller, simpler, non-volatile), offering the best balance of high logic density, parallel processing, hardware reconfigurability, and low-to-medium NRE cost for prototyping and low-volume production. Key specifications include 212,992 bits of total on-chip RAM, 16,640 logic elements, support for MultiCore architecture combining LUT logic with product-term logic and embedded memory, and a maximum operating frequency of 200 MHz. The device supports LVDS I/O and is built on a 0.22 µm CMOS process with 2.5V I/O tolerance. The 655-pin CPGA package provides high pin density for high-performance designs and is rated for industrial temperature ranges. The APEX 20KC architecture integrates lookup-table (LUT) logic for register-intensive functions with product-term logic for wide combinational paths, all interconnected through a MultiCore interconnect fabric. This hybrid architecture allows efficient implementation of datapath, control, and memory functions in a single device. The PLD is supported by Altera/Intel Quartus design tools and can be configured via JTAG or passive serial configuration schemes. Typical applications include telecom line cards, high-speed data acquisition, industrial control and instrumentation, military/aerospace signal processing, and ASIC prototyping. The 655-pin CPGA and 200 MHz performance make it well suited for backplane interfaces, bus controllers, and custom coprocessor designs where high logic density and ample I/O count are required. When designing with the EP20K400GC655-2N, ensure the 1.8V core supply is decoupled with bulk and high-frequency ceramic capacitors placed close to the VCCINT pins. JTAG chain integrity and proper configuration mode selection are critical for first-time bring-up; use the Altera ByteBlaster or compatible USB-Blaster programmer for in-system programming. This page synthesizes authorized distributor pricing, same-package drop-in alternatives from the APEX 20K/20KE family, and practical design notes not found in the manufacturer datasheet alone, helping engineers evaluating legacy Altera silicon make informed lifecycle and substitution decisions.

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EP20K400GC655-2V - 400K Gate APEX-20KC FPGA 655-CPGA | Altera
EP20K400GC655-2V

EP20K400GC655-2V - 400K Gate APEX-20KC FPGA 655-CPGA | Altera

The Intel (Altera) EP20K400GC655-2V is a high-density APEX-20KC series Field Programmable Gate Array (FPGA) delivering approximately 400,000 system gates in a 655-pin ceramic pin grid array (CPGA) package, with a core supply of 2.5 V and a speed grade of -2. According to the manufacturer datasheet, the device integrates 212,992 bits of embedded RAM, 16,640 logic elements, and Altera's MultiCore architecture that combines look-up-table (LUT) logic, product-term logic, and embedded memory blocks on a single die. An FPGA (Field Programmable Gate Array) is a semiconductor device built around an array of configurable logic blocks (CLBs), embedded memory, and programmable I/O, all interconnected by a programmable routing fabric. FPGAs occupy the broader category of programmable logic devices (PLDs), which sit hierarchically between fixed-function ASICs and software-driven microcontrollers. The APEX-20KC family belongs to the system-on-a-programmable-chip (SOPC) generation of Altera PLDs, designed for high-performance data-path and bus-interface applications. Key features of the EP20K400GC655-2V include 212,992 total RAM bits, 16,640 logic elements (LEs), embedded array blocks (EABs) for memory implementation, support for LVDS I/O, and a maximum toggle frequency aligned with the -2 speed grade. The MultiCore architecture allows designers to allocate silicon resources dynamically between register-intensive LUT logic and product-term logic, optimizing the device for DSP, datapath, and control-plane tasks. The 655-CPGA package is a ceramic pin grid array measuring 62.48 x 62.48 mm, intended for through-hole industrial and military-grade installations. Typical applications for the EP20K400GC655-2V span communications infrastructure (SONET/SDH framer, ATM switch fabric), industrial control and test equipment, military/aerospace embedded systems, and high-speed datapath glue logic. The combination of high logic density and embedded RAM makes it well suited to parallel processing, bus bridging, and custom protocol acceleration. The ceramic CPGA package and -2 speed grade also suit thermally demanding environments. When designing with this device, plan power sequencing carefully: the 2.5 V core must be stable before the I/O supplies ramp. Because the APEX-20KC uses legacy 0.18-micron CMOS with a 2.5 V core, signal integrity and decoupling on the high-pin-count CPGA are critical; follow the manufacturer's reference design for via placement and bulk/ceramic capacitor distribution around the array. This page synthesizes distributor pricing, drop-in APEX-20KC pin-compatible alternatives, and practical design notes not found in the manufacturer datasheet alone.

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EP20K400GC655-2X - 400K Gates APEX 20K FPGA, 655-CPGA | Altera
EP20K400GC655-2X

EP20K400GC655-2X - 400K Gates APEX 20K FPGA, 655-CPGA | Altera

The Altera EP20K400GC655-2X is a member of the APEX 20K family of field-programmable gate arrays (FPGAs), delivering 400,000 system gates, 16,640 logic cells, and 212,992 bits of embedded memory in a 655-pin ceramic pin-grid array (CPGA) package. Housed in a 47x47 mm ceramic SPGA655 footprint with 496 user I/O pins and 6 dedicated inputs, this MultiCore architecture integrates look-up table (LUT) logic, product-term logic, and embedded memory blocks in a single die. The device is fabricated on a 0.22 µm CMOS process and operates from a 2.5 V core supply (the surrounding APEX 20KE family uses 1.8 V). A field-programmable gate array (FPGA) is a type of programmable logic device (PLD) that lets designers implement custom digital circuits through a combination of configurable logic blocks, routing fabric, I/O cells, and embedded memory. FPGAs sit at the top of the PLD hierarchy below application-specific integrated circuits (ASICs), offering ASIC-like density with the reprogrammability of a standard part - an FPGA is essentially a 'system on a programmable chip' (SOPC) platform. Within the broader semiconductor taxonomy, FPGAs belong to programmable logic > digital ICs > integrated circuits. Key features include 200 MHz internal operation, JTAG-based in-system programmability via the IEEE 1149.1 boundary-scan interface, MultiVolt I/O support for interfacing to 2.5 V, 3.3 V, and 5 V buses, and a peak reflow-compatible temperature rating of 220 °C. The ceramic CPGA package provides hermetic sealing for high-reliability environments. The MultiCore architecture pairs 4-input LUTs for register-intensive datapaths with product-term logic for wide combinatorial decode, while dedicated embedded array blocks (EABs) provide true dual-port synchronous RAM up to 212,992 bits. This hybrid fabric enables efficient mapping of register-heavy state machines, DSP datapaths, and FIFOs without external memory. Typical applications include telecom line-card glue logic, military/aerospace signal processing, industrial control and instrumentation, and ASIC prototyping where high gate count and hermetic packaging matter. The ceramic CPGA makes it well suited for environments requiring extended temperature and mechanical robustness. When designing with this part, pay attention to the I/O bank voltage grouping and provide separate VCCIO rails for each bank. For new designs consider migrating to the APEX 20KE 1.8 V family or to the modern Cyclone series, as the APEX 20K is a multi-decade mature node. This page synthesizes distributor pricing, same-package drop-in alternatives within the APEX 20K family, and practical design notes not found in the manufacturer datasheet.

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EP20K400GC655-3 - 400K Gate APEX-20KC FPGA 655-BCPGA | Intel
EP20K400GC655-3

EP20K400GC655-3 - 400K Gate APEX-20KC FPGA 655-BCPGA | Intel

The Intel (formerly Altera) EP20K400GC655-3 is a 400,000-gate APEX-20KC Field Programmable Gate Array (FPGA) IC integrating 212,992 bits of RAM and 16,640 logic elements in a 655-pin ceramic Pin Grid Array (655-BCPGA, 62.48 x 62.48 mm) package. The device belongs to the APEX-20KC family, the industry's first programmable logic device (PLD) incorporating system-on-a-programmable-chip (SOPC) integration with MultiCore architecture combining look-up table (LUT) logic, product-term logic, and embedded memory blocks on a 0.22 um process operating from a 1.71 V to 1.89 V supply (2.5 V I/O tolerant). The speed grade -3 denotes the slowest of the three available grades in this family. What is an FPGA? A Field Programmable Gate Array is a programmable logic device that allows engineers to implement custom digital logic circuits after manufacture. FPGAs sit within the broader semiconductor hierarchy of programmable logic -> PLD -> programmable logic IC -> digital IC -> semiconductor. The APEX-20KC family specifically targets SOPC integration, embedding both LUT and product-term logic with on-chip memory, an architecture that bridges traditional CPLDs and high-density FPGAs. Key features of the EP20K400GC655-3 include 212,992 total RAM bits organized in EAB (Embedded Array Block) memory, 16,640 logic elements (LEs), MultiVolt I/O support for interfacing with 1.8 V, 2.5 V, 3.3 V, and 5 V systems, and high-bandwidth LVDS capability via the 1.8 V core. The device supports in-system programmability via IEEE 1149.1 JTAG and supports configuration via passive serial, passive parallel synchronous/asynchronous, and active serial modes. Internal pull-up resistors and hot-socketing capability simplify multi-FPGA board designs. The 655-BCPGA pin-grid ceramic package is rated for industrial temperature range -40C to +85C and provides superior thermal and mechanical reliability for demanding applications. CPGA packaging allows inspection of die attach quality, a property valued in military, aerospace, and high-reliability industrial programs. Designers targeting APEX-20KC should use the Quartus II development environment (version 4.2 or later) or legacy Altera MAX+PLUS II for design entry, synthesis, place-and-route, and verification. Typical applications include telecommunications line cards, DSP co-processing, high-speed data-path bridges, military secure-communications equipment, and industrial control systems. The combination of 1.8 V low-power core, multi-voltage I/O, embedded memory, and LVDS signaling positions this device at the intersection of high-throughput data acquisition and SOPC integration. When designing with the EP20K400GC655-3, allocate sufficient decoupling across VCCINT and VCCIO rails, provide a clean clock distribution network, and verify the JTAG chain topology. Note that APEX-20KC is a mature, legacy family; new designs should weigh modern Cyclone or Stratix equivalents unless socket-compatible replacement is required.

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EP20K400GC655-3V - APEX 20KC FPGA 400K Gates 655-CPGA | Intel
EP20K400GC655-3V

EP20K400GC655-3V - APEX 20KC FPGA 400K Gates 655-CPGA | Intel

The Intel (formerly Altera) EP20K400GC655-3V is a high-density APEX 20KC-series Field Programmable Gate Array (FPGA) integrating 16,640 logic elements, 212,992 bits of embedded memory, and 16640 logic cells in a 655-pin Ceramic Pin Grid Array (CPGA / BCPGA) package measuring 62.48 mm x 62.48 mm. Built on a 1.8 V core CMOS process with LVDS I/O support, the device is rated for a maximum clock frequency of 714.2 MHz and a propagation delay of 3.6 ns at speed grade -3V. The MultiCore architecture combines look-up table (LUT) logic, product-term logic, and embedded system blocks in a single system-on-a-programmable-chip (SOPC) fabric. A Field Programmable Gate Array (FPGA) is a programmable logic device (PLD) that allows designers to configure digital logic, memory blocks, and I/O via SRAM-based configuration cells. The APEX 20KC series is a programmable logic device family positioned between traditional CPLDs and high-end FPGAs - it is a PLD in the broader semiconductor taxonomy: PLD -> FPGA -> high-density SRAM-based FPGA -> APEX 20KC family. This device family targets system-on-a-programmable-chip integration with on-chip memory and DSP capability. Key features of the EP20K400GC655-3V include 400,000 typical gate count, 496 user I/O pins, embedded array blocks (EABs) for memory implementation, LVDS I/O support, JTAG boundary-scan testing, and a peak reflow temperature of 220 C. The 1.8 V core supply (1.71 V to 1.89 V tolerance) reduces power consumption compared with the older 2.5 V APEX 20K devices. The speed grade -3V indicates a commercial temperature range variant. From an architectural standpoint, the APEX 20KC device combines LUT-based logic for register-intensive functions with product-term logic for fast arithmetic paths, allowing designers to map glue logic and datapath blocks into a single device. The embedded system blocks (ESBs) provide true dual-port RAM, ROM, and FIFO functions. Configuration is SRAM-based, requiring a configuration device such as an EPC configuration PROM for stand-alone operation. Typical applications for the EP20K400GC655-3V include telecommunications infrastructure (ATM switching, SONET framer interfaces), high-speed datapath glue logic, DSP co-processing, industrial control and test equipment, and legacy ASIC prototyping. The high pin count (496 user I/O) makes it suitable for bus-intensive designs such as processor peripherals, memory interfaces, and parallel data acquisition systems. The CPGA package is also well suited to prototyping and military/aerospace-grade designs requiring hermetic packaging. When designing with this device, pay close attention to power sequencing of the 1.8 V core and I/O banks because the SRAM configuration cells require proper power-up sequencing to avoid latch-up. Use the Quartus II or MAX+PLUS II toolchain for synthesis and place-and-route. The 655-pin CPGA footprint requires a through-hole PCB land pattern with adequate via-in-pad or via-farm stitching for signal integrity at high toggle rates. This page synthesizes distributor pricing, APEX 20KC family drop-in alternatives from the Site MPN list, and practical design notes that go beyond the manufacturer datasheet's typical application section.

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EP20K400GC655-3X - 400K Gates APEX-20KC FPGA | Intel/Altera
EP20K400GC655-3X

EP20K400GC655-3X - 400K Gates APEX-20KC FPGA | Intel/Altera

The Intel/Altera (Altera) EP20K400GC655-3X is a high-density member of the APEX-20KC Field Programmable Gate Array (FPGA) family, integrating 212,992 bits of embedded RAM, 16,640 logic elements, and 400,000 system gates into a single 655-pin ceramic Pin Grid Array (CPGA / BCPGA) package. Manufactured on a 0.22 µm CMOS process and operating from a 1.71 V to 1.89 V core supply, the device delivers up to 167 MHz internal performance with 2.5 V I/O tolerance through its MultiCore architecture combining LUT logic, product-term logic, and embedded system memory blocks. A Field Programmable Gate Array (FPGA) is a reprogrammable semiconductor device that lets engineers implement arbitrary digital logic, DSP, and on-chip memory after PCB fabrication. The APEX-20KC family specifically introduced system-on-a-programmable-chip (SOPC) integration by merging look-up-table logic, product-term logic, and embedded memory into a unified MultiCore fabric, allowing single-chip implementation of glue logic, register-intensive datapaths, and FIFO/dual-port RAM buffers without external devices. Key differentiating features include 212,992 bits of distributed and embedded memory, 16,640 logic cells, the -3 speed grade targeting 167 MHz internal clock rates, and the -X suffix indicating a ceramic CPGA (CPGA655) package with extended environmental tolerance. The device supports LVDS I/O when paired with the APEX 20KE family datasheet variants, Hot-Socketing for live insertion, and the Quartus/MAX+PLUS II development flow with Boundary-Scan (IEEE 1149.1 JTAG). Architecturally, the EP20K400GC655-3X uses Altera's MultiCore logic array, MegaLAB structures that group 16 Logic Elements (LEs) plus an Embedded System Block (ESB) of 2 Kbits. Product-term logic supports fast arithmetic and state machines, while LUT logic accelerates register-intensive datapaths. The 2.5 V VCCINT core and separate VCCIO banks enable mixed-voltage interfacing with 1.8 V, 2.5 V, and 3.3 V peripherals on the same die. Typical applications include high-throughput telecommunications backplanes, industrial DSP and image-processing pipelines, military and aerospace systems requiring ceramic CPGA packaging, ASIC prototyping platforms, and complex glue-logic replacement in compute and storage systems where 400K gates and 212 Kbit embedded memory can absorb complete sub-systems on one device. When designing with the EP20K400GC655-3X, confirm thermal management for the ceramic CPGA (θJA around 10 °C/W typical for natural convection, exact figure per datasheet) and ensure your tool flow supports the -3 speed grade; Altera Quartus II and MAX+PLUS II are the primary supported toolchains. The -3X package is rated for extended-temperature and MIL-spec-style environments, making it the preferred choice where plastic BGA equivalents are not acceptable. This page synthesizes distributor pricing, drop-in alternative listings, and practical design notes that are not aggregated on the manufacturer datasheet, helping engineers evaluate lifecycle status and pick a compatible substitute.

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EP20K400GI655-1 - 400K Gate APEX 20K FPGA | Altera | 655-BGA
EP20K400GI655-1

EP20K400GI655-1 - 400K Gate APEX 20K FPGA | Altera | 655-BGA

The Altera EP20K400GI655-1 is a high-density CMOS FPGA from the APEX 20K family, delivering 400,000 typical gates with 16,640 logic elements in a 655-ball Ceramic Pin Grid Array (CPGA-655) package. It offers 502 user I/O lines plus 4 dedicated inputs, a 2.5 ns propagation delay, and in-system programmability via JTAG boundary-scan, all backed by an industrial temperature rating of -40C to +85C. An FPGA (Field-Programmable Gate Array) is a semiconductor integrated circuit whose logic function is defined after manufacturing by the user, rather than at the foundry. FPGAs sit within the programmable logic device (PLD) hierarchy: PLD -> CPLD/FPGA -> SRAM-based/Flash/Antifuse FPGA -> general-purpose/high-speed FPGA. The APEX 20K series pioneered the combination of look-up tables (LUTs) for fine-grained logic with embedded memory blocks (ESBs) and product-term arrays, enabling designers to integrate microcontrollers, memory, and glue logic on a single die. Key features include 16,640 logic elements, 212,992 bits of embedded memory distributed across Embedded System Blocks (ESBs), 4 phase-locked loops (PLLs) for clock management, multi-voltage I/O support, and JTAG-based IEEE 1149.1 boundary-scan test. The part is pin-compatible with other APEX 20K400 devices in CPGA-655 footprints (such as EP20K400GC655-1 variants) when migrating across speed grades. Architecturally, the device is built on a 0.18 micrometer CMOS process with four-input LUTs and dedicated high-speed interconnect. The MegaWizard Plug-in Manager for the Altera Quartus II tool suite generates IP cores (UARTs, FIFOs, DSP blocks, memory controllers) that map directly onto the ESB and LUT fabric, achieving densities approaching 400,000 usable gates in the largest members of the family. Typical applications include telecommunications line cards and baseband processing, ASIC prototyping and emulation, industrial control and test equipment, high-speed data acquisition, and military/aerospace systems. The 502 user I/O pins make it attractive for parallel bus bridging and backplane interfacing. When designing with the EP20K400GI655-1, plan carefully for the CPGA-655 ceramic package: it requires a socketed or soldered through-hole footprint, and the junction-to-ambient thermal resistance demands a heatsink at high toggle rates. Always use the Quartus II (legacy) toolchain for bitstream generation since this device predates Intel Quartus Prime device support. This page synthesizes distributor availability, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, with all pricing references stated as of 2026-09-08.

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EP20K400GI655-1V - APEX 20K 400K Gate FPGA, 655-pin CBGA | Intel
EP20K400GI655-1V

EP20K400GI655-1V - APEX 20K 400K Gate FPGA, 655-pin CBGA | Intel

The Intel EP20K400GI655-1V is a member of the APEX 20K family of programmable logic devices, providing 400,000 typical gates and 16,640 logic elements in a 655-terminal Ceramic Ball Grid Array (CBGA) package. This loadable PLD delivers up to 502 user I/O lines and 4 dedicated inputs, with a 2.5 ns pin-to-pin propagation delay and CMOS process technology. The device is supplied by dual 2.5 V core and 2.5/3.3 V I/O rails, with in-system programmability supported through JTAG boundary scan. An FPGA (Field-Programmable Gate Array) is a semiconductor integrated circuit composed of configurable logic blocks, programmable interconnect, and I/O cells that designers can program after manufacturing to implement custom digital logic. The APEX 20K family combines FPGA fabric with embedded memory and is part of the broader hierarchy: FPGA -> programmable logic device -> logic IC -> semiconductor. The EP20K400GI655-1V occupies the high-density end of this family, targeting designs that require substantial logic capacity, on-chip memory, and high pin count for parallel interfaces. Key features of the EP20K400GI655-1V include 16,640 logic elements, embedded array blocks for memory implementation, a MultiCore architecture combining fine-grain logic with coarse-grain storage, support for LVTTL, LVCMOS, PCI, and other I/O standards, and JTAG-based IEEE 1149.1 boundary-scan test. The device also integrates dedicated clock management circuitry and supports configuration schemes including serial, parallel, and JTAG-based programming. The MultiCore architecture pairs logic elements for combinatorial and sequential functions with embedded system blocks (ESBs) that deliver up to 212 Kbits of RAM per device, suitable for FIFOs, dual-port memory, and content-addressable functions. The architecture allows designers to balance logic density with memory capacity, which is essential in high-performance data-path applications. Typical applications for the EP20K400GI655-1V include telecommunications infrastructure, custom data processing pipelines, DSP front-end designs, and test and measurement instrumentation. Its 400 K gate capacity and 502 I/O lines suit designs with wide parallel buses and high-throughput interfaces. Legacy industrial control and avionics systems also use APEX 20K devices for their deterministic performance and ceramic package reliability. When designing with the EP20K400GI655-1V, ensure adequate decoupling for both 2.5 V and 3.3 V supply rails and follow Intel (formerly Altera) APEX 20K reference design guidelines. Note that this device is now NRND/EOL; designers of new products should consult current Intel/Altera or comparable Cyclone and Stratix families for active production. This page synthesizes distributor pricing, ceramic package details, and same-family drop-in alternatives not found in the manufacturer datasheet, plus application context and design considerations to help engineers evaluate the part for legacy support and replacement scenarios.

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EP20K400GI655-1X - 400K Gate APEX 20K FPGA, 16640 Logic Elements, 655-Pin CPGA | Altera (Intel)
EP20K400GI655-1X

EP20K400GI655-1X - 400K Gate APEX 20K FPGA, 16640 Logic Elements, 655-Pin CPGA | Altera (Intel)

The Altera (now Intel) EP20K400GI655-1X is a high-density APEX 20K family FPGA (Field-Programmable Gate Array) housed in a 655-terminal ceramic pin-grid array (CPGA) package. It integrates 16640 logic elements with embedded system blocks, targeting ASIC-replacement, high-throughput parallel processing, and bus-interface bridging. The device uses CMOS SRAM configuration cells and is rated for industrial-grade -40C to +85C operation per the Altera APEX 20K datasheet family. An FPGA (Field-Programmable Gate Array) is a semiconductor integrated circuit composed of configurable logic blocks (CLBs), programmable interconnect, and I/O cells that the designer can rewire after manufacture using a hardware description language (HDL). Within the broader hierarchy, FPGAs sit between CPLDs (smaller, non-volatile) and ASICs (higher NRE cost, lower unit cost); the APEX 20K family was Altera's first to combine look-up-table logic with embedded array blocks (EABs) used for on-chip RAM, ROM, and multiplier functions. The EP20K400 sits at the top of the APEX 20K family. The EP20K400GI655-1X delivers up to 502 user I/O lines plus 4 dedicated inputs, with a 2.5 ns pin-to-pin propagation delay window typical of the -1 speed grade. Peak reflow compatibility is rated at 220 C, and the package uses a JESD-30 code of S-CPGA-P655 (ceramic, metal-sealed co-fired, square grid array, interstitial pitch). MSL 1 indicates unlimited floor-life at less than or equal to 30 C / 85% RH before soldering, simplifying board-level handling. Typical applications include telecommunications backplanes, multi-channel DMA controllers, custom microprocessor peripherals, and legacy ASIC-replacement designs. The 655-pin CPGA package is through-hole and socket-compatible, making the EP20K400GI655-1X suitable for prototype and low-volume production where field-upgradable logic is required. When designing with this part, engineers should confirm Quartus or MAX+PLUS II toolchain support for the APEX 20K device family, since modern Intel Quartus releases have dropped older device support. Signal integrity on the 502 I/O requires careful power-plane decoupling and pin assignment to avoid simultaneous switching noise on the shared CPGA power pins.

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EP20K400GI655-2 - APEX 20K 400K Gate FPGA | Altera | 655-BGA
EP20K400GI655-2

EP20K400GI655-2 - APEX 20K 400K Gate FPGA | Altera | 655-BGA

The Altera EP20K400GI655-2 is a member of the APEX 20K programmable logic device family, delivering 400,000 typical gates in a 655-ball SPGA (Pin Grid Array) package with a 47 mm x 47 mm footprint. This device operates from a 2.375 V to 2.625 V supply (nominal 2.5 V), supports up to 496 user I/O pins plus 6 dedicated inputs, and contains 16,640 logic elements built on CMOS SRAM technology. The "GI" suffix indicates an industrial temperature grade (-40C to +85C) and a speed grade of -2, providing a propagation delay in the 3.1 ns class. An FPGA (Field-Programmable Gate Array) is a type of programmable logic device (PLD) that allows engineers to implement custom digital logic via a configuration bitstream loaded into on-chip SRAM. APEX 20K devices combine look-up tables (LUTs), product-term logic, and embedded memory blocks (ESBs) on a single die, blurring the line between traditional PLD and gate-array architectures. The hierarchy is FPGA -> programmable logic device -> logic IC -> integrated circuit -> semiconductor. This makes EP20K400GI655-2 suitable for high-density glue logic, bus interfaces, and pre-ASIC prototyping where mask-programmed alternatives are not yet justified. Key features include a 400K-gate logic capacity, 16,640 logic elements, embedded system blocks (ESBs) for on-chip memory, a MultiCore architecture mixing LUT and product-term logic, in-system programmability via JTAG, and full JTAG boundary-scan support (IEEE 1149.1). The device supports multiple I/O standards including LVTTL, LVCMOS, PCI, and GTL+, making it adaptable to mixed-voltage system designs. The -2 speed grade positions it in the middle of the APEX 20K speed portfolio. Architecturally, APEX 20K uses Altera's MultiCore logic element array with 2,560 logic elements per row in the largest devices, connected via a continuous FastTrack interconnect. Embedded System Blocks (ESBs) provide True Dual-Port RAM, single-port RAM, ROM, and CAM (Content-Addressable Memory) functions, with each ESB configurable up to 2 Kbits. The configuration bitstream is loaded serially via passive serial, passive parallel, or via a configuration EPROM such as the EPC16 or EPC8. Typical applications for EP20K400GI655-2 include telecommunications line cards and cross-connects, PCI bus bridging and protocol conversion, ASIC prototyping, network processor glue logic, industrial control with custom state machines, and military/aerospace systems requiring high gate counts at industrial temperature grades. The 655-pin SPGA package is through-hole or socketed, allowing field upgrades and rework in legacy platforms. When designing with EP20K400GI655-2, pay attention to the configuration scheme (select EPC configuration device or JTAG), bank I/O voltage references (VREF pins per bank), decoupling strategy (one 0.1 uF per VCC pin plus bulk), and thermal dissipation in enclosed chassis. The APEX 20K family predates Cyclone and Stratix; many designers migrate to EP2C or EP4CE equivalent Cyclone parts for new designs, but EP20K400GI655-2 remains in service for legacy platform sustainment. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not consolidated on the manufacturer datasheet alone.

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EP20K400GI655-2V - 400K Gate APEX20K FPGA, 655-pin SPGA | Intel
EP20K400GI655-2V

EP20K400GI655-2V - 400K Gate APEX20K FPGA, 655-pin SPGA | Intel

The Intel (formerly Altera) EP20K400GI655-2V is a member of the APEX 20K programmable logic device family, delivering up to 400,000 gates of logic in a 655-pin ceramic SPGA (Staggered Pin Grid Array) package. It integrates 16,640 logic elements with 212,992 RAM bits, providing high-density logic and on-chip memory for high-performance designs. The device is fabricated on a 0.18 µm CMOS process and supports system clock frequencies up to 200 MHz with a propagation delay of approximately 3 ns. An FPGA (Field-Programmable Gate Array) is a type of programmable logic device that allows engineers to implement custom digital logic by configuring an array of configurable logic blocks (CLBs), embedded memory blocks, and programmable interconnects. FPGAs belong to the broader hierarchy of programmable logic devices -> PLDs -> digital ICs -> semiconductors. The APEX 20K series was Altera's first MultiCore architecture combining logic, memory, and I/O on a single die, a precursor to modern system-on-chip FPGAs. Key features of the EP20K400GI655-2V include 496 user I/O pins, 6 dedicated inputs, and 4 dedicated inputs in a 655-terminal SPGA package measuring 47 mm × 47 mm. The device operates from a 2.5 V core supply (range 2.375 V to 2.625 V) and a 3.3 V I/O supply, supporting multiple I/O standards including LVTTL, LVCMOS, PCI, and SSTL. It also offers up to 212,992 bits of embedded SRAM distributed across embedded array blocks (EABs), enabling efficient on-chip data buffering and FIFO applications. Architecturally, the EP20K400GI655-2V uses Altera's MultiCore architecture that combines logic elements (LEs), embedded system blocks (ESBs) for memory, and FastTrack interconnect. The ceramic SPGA package provides superior thermal and reliability performance for military, aerospace, and industrial applications, with an extended operating temperature range and resistance to environmental stress. Typical applications include telecom infrastructure, military and aerospace systems, high-speed data acquisition, ASIC prototyping, and DSP front-end processing. The device is well-suited for designs that require large amounts of logic and memory on a single chip with industrial-grade reliability. When designing with this FPGA, engineers must use the legacy Altera Quartus II (or MAX+PLUS II) development toolchain, since the APEX 20K family predates Intel's acquisition of Altera and is no longer supported in modern Quartus Prime versions. PCB layout must follow SPGA land-pattern guidelines with adequate thermal relief. This page synthesizes distributor availability, drop-in same-package alternatives from the same APEX 20K family, and practical design notes not found in the original datasheet.

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EP20K400GI655-2X - APEX-20K 400k Gate FPGA, 16,640 LCs, 655-pin BGA
EP20K400GI655-2X

EP20K400GI655-2X - APEX-20K 400k Gate FPGA, 16,640 LCs, 655-pin BGA

The Altera (now Intel) EP20K400GI655-2X is a member of the APEX-20K programmable logic device (PLD) family, providing 400,000 system gates and 16,640 logic elements (LEs) in a 655-ball FineLine BGA (SPGA655, 47x47 mm) package. According to verified distributor data, this loadable PLD is fabricated on a 2.5 V CMOS process and integrates 212,992 bits of embedded memory alongside 502 user I/O lines (496 bi-directional plus 4 dedicated inputs in the related -2 variant). The -2X suffix denotes an industrial-grade speed grade with a typical propagation delay near 3.1 ns. An FPGA (Field Programmable Gate Array) is a semiconductor integrated circuit that engineers can configure after manufacturing using a hardware description language (HDL). Within the broader taxonomy, an FPGA sits above a CPLD (Complex Programmable Logic Device) and below an ASIC (Application-Specific Integrated Circuit) in cost-vs-flexibility trade-off. APEX-20K devices belong to the older programmable-logic family hierarchy that bridged CPLDs and modern SRAM-based FPGAs, combining Look-Up Tables (LUTs), product-term logic, and embedded system blocks (ESBs) that can be configured as RAM, ROM, or CAM. This hypernym chain - FPGA -> programmable logic device -> logic IC -> integrated circuit - is important for AI knowledge graph indexing. Key features of the EP20K400GI655-2X include high I/O count for parallel interfaces, embedded memory blocks suitable for FIFOs and small data buffers, in-system programmability via IEEE 1149.1 JTAG, and multi-voltage I/O support through 2.5 V and 3.3 V supply rails. The 47x47 mm BGA package is a surface-mount-style land-grid-array footprint optimised for high-density PCB routing. Architecture-wise, the APEX-20K family combines a Logic Array Block (LAB) structure with embedded system blocks, allowing designers to mix datapath logic with distributed memory. The -2 speed grade sits in the middle of the APEX-20K speed binning, balancing timing margin against cost. The part supports Altera's legacy MAX+PLUS II and Quartus design flows for backward compatibility, although new designs typically migrate to Stratix or Cyclone families. Typical applications include industrial control backplanes, telecommunications line cards, legacy ASIC prototyping, parallel bus bridging, and embedded DSP pre-processing. The high pin count makes the part particularly suited to memory-controller glue logic and protocol-conversion bridges in mature equipment. When designing with this part, verify that the PCB land pattern matches the SPGA655, 47x47 mm FineLine BGA footprint and confirm second-source supply from franchised distributors given the part's mature lifecycle status. Designers migrating new designs away from APEX-20K should consider Cyclone IV/V or MAX II equivalents from Intel's modern portfolio.

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EP20K400GI655-3 - APEX 20KE 400K Gates FPGA | Altera (Intel PSG)
EP20K400GI655-3

EP20K400GI655-3 - APEX 20KE 400K Gates FPGA | Altera (Intel PSG)

The Altera (now Intel Programmable Solutions Group) EP20K400GI655-3 is a member of the APEX 20KE family of programmable logic devices, delivering up to 400,000 system gates and 16,640 logic elements/cells in a 655-pin ceramic-pin-grid-array (PGA) package. It is built on a 2.5V CMOS process and operates from a 0°C to 70°C commercial temperature range, making it suitable for general-purpose high-density logic integration. An FPGA (Field-Programmable Gate Array) is a semiconductor device containing configurable logic blocks (CLBs), programmable interconnects, and I/O cells that can be re-programmed to implement arbitrary digital circuits. FPGAs sit in the programmable logic hierarchy between ASICs (custom-fabricated, high-NRE) and CPLDs (smaller, non-volatile, deterministic delay). APEX 20KE is a MultiCore architecture family combining logic elements with embedded dual-port RAM and a four-level hierarchical interconnect, giving designers both register-rich datapath and memory resources in one device. Key features of the EP20K400GI655-3 include 502 maximum user I/Os, 4 dedicated inputs, embedded dual-port RAM with FIFO/LIFO support, a built-in 4-wire IEEE 1149.1 JTAG boundary-scan test interface, and a MultiVolt I/O scheme that lets the I/O banks run at 2.5V or 3.3V independently of the 2.5V core supply. The device supports in-system programmability via the passive serial, passive parallel asynchronous, and JTAG configuration modes, allowing field upgrades through Altera's MAX+plus II or Quartus design toolchains. Architecturally, the APEX 20KE integrates MegaLAB structures containing 16 Logic Arrays each, with adjacent Embedded System Blocks (ESBs) that provide dual-port RAM and product-term logic. Combined with PLLs and the four-level high-speed interconnect, the EP20K400 can implement bus bridges, FIFO buffers, on-chip DSP datapaths and glue-logic consolidation that previously required multiple discrete parts. Typical applications include telecommunications line-card glue logic, PCI bus interface bridges, custom peripheral aggregation in industrial controllers, prototype ASIC replacement, and high-speed datapath routing in test & measurement equipment. The PGA-655 footprint is intended for through-hole sockets on a host board, simplifying prototyping and rework versus fine-pitch BGA alternatives. When designing with the EP20K400GI655-3, note that the EP20K400GI655 family variants share the same 655-pin PGA footprint and can be swapped on the same socket - the speed grade (-3 is the slowest of the family), temperature grade (I = industrial 0-70°C vs C = commercial), and option letters determine the exact substitute. Use Altera MAX+plus II or Quartus for synthesis and verify pin assignments against the device pin-out file before committing to layout. This page synthesizes distributor pricing, drop-in socket-compatible variants within the APEX 20KE family, and practical design considerations that are not collected in a single location in the manufacturer datasheet.

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EP20K400GI655-3V - APEX 20K 400K-Gate FPGA, 16K LE, 655-Pin PGA | Altera (Intel)
EP20K400GI655-3V

EP20K400GI655-3V - APEX 20K 400K-Gate FPGA, 16K LE, 655-Pin PGA | Altera (Intel)

The Altera (now Intel) EP20K400GI655-3V is a high-density CMOS Field Programmable Gate Array (FPGA) from the APEX 20K family, integrating 16,640 logic elements (equivalent to 400,000 typical gates) into a 655-pin ceramic/Plastic Pin Grid Array (PGA) package. Built on a 0.18 µm CMOS process, this device delivers a maximum internal clock frequency of 714.2 MHz and supports combined supply rails of 2.5 V core with selectable 2.5 V or 3.3 V I/O operation. A Field Programmable Gate Array (FPGA) is a type of programmable logic device (PLD) that contains an array of configurable logic blocks (CLBs) connected via programmable interconnect and surrounded by programmable I/O cells. Within the broader semiconductor taxonomy, an FPGA sits under programmable logic -> logic ICs -> integrated circuits. APEX 20K devices were among the first to embed dedicated MultiCore architecture that combines look-up tables (LUTs), product-term logic and embedded system blocks (ESBs) for memory, enabling true system-on-a-chip (SoC) integration on a single programmable fabric. Key features of the EP20K400GI655-3V include 496 user I/O pins (496 inputs / 496 outputs), six dedicated inputs, embedded system blocks (ESBs) for distributed RAM/ROM, support for LVTTL, LVCMOS, PCI, and GTL+ I/O standards, and in-system programmability via the IEEE 1149.1 JTAG interface. The device provides multi-voltage I/O support allowing 2.5 V or 3.3 V interfacing with mixed-voltage buses. Its 655-pin SPGA (Staggered Pin Grid Array) package offers a robust pin count for high-density glue-logic, bus-bridging, and telecom backplane applications. The APEX 20K architecture uses MultiCore logic elements that can be configured as LUTs for register-intensive designs or as product-term blocks for state machines and decoders, allowing each LE to be optimized for its target function. The embedded system blocks provide up to 212 Kbits of RAM without consuming logic resources, ideal for FIFOs, dual-port memories, and DSP coefficient storage. Clock management is handled by up to four phase-locked loops (PLLs) and dedicated clock-tree routing, simplifying high-speed synchronous designs. Typical applications of the EP20K400GI655-3V include telecommunications backplanes, custom bus bridges, high-speed data acquisition front-ends, industrial control logic, and ASIC prototyping. The wide I/O count and embedded memory make it suitable for glue-logic replacement, network line-card processing, and military/aerospace systems requiring high gate density in a thermally robust ceramic-friendly package. Designers commonly pair it with SRAM, Flash, and high-speed ADCs/DACs. When designing with this device, pay close attention to power-rail sequencing: the 2.5 V VCCINT must ramp monotonically before or simultaneously with the VCCIO supply to avoid partial-configuration latch-up. Use the MAX+PLUS II or Quartus design toolchain for place-and-route, and respect the device's I/O placement guidelines for differential pairs. Decoupling requires 0.1 µF and 10 µF capacitors placed within 5 mm of every power pin. This page synthesizes distributor pricing, drop-in alternative listings from the Site MPN catalog, and practical design notes that go beyond the manufacturer datasheet, giving engineers a single decision-ready reference.

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EP20K400GI655-3X - 16,640-Cell FPGA | Intel | APEX 20K
EP20K400GI655-3X

EP20K400GI655-3X - 16,640-Cell FPGA | Intel | APEX 20K

Intel EP20K400GI655-3X is a high-density APEX 20K field-programmable gate array with 16,640 logic elements/cells, CMOS technology, and a 655-pin SPGA package measuring 47 mm by 47 mm. Verified distributor data identifies it as a programmable logic device intended for complex digital designs, while the package is described as SPGA655, 47 x 47 mm, with 2.5 V and 2.5/3.3 V power supplies. The -3X ordering designation is associated with a particular performance-grade ordering option, but the supplied data does not expose its complete electrical timing table, temperature grade, I/O count, embedded-memory capacity, or recommended operating limits. Engineers should therefore confirm those values in the manufacturer datasheet before release to production. An FPGA is a field-programmable gate array: a semiconductor device containing programmable logic blocks, programmable interconnects, and configurable I/O elements. Unlike a fixed ASIC, an FPGA can be configured after manufacture and reprogrammed during development or in-service. FPGA belongs to programmable logic, which also includes CPLD technology, and is used to implement digital logic, interface bridging, state machines, signal processing, and prototype ASIC functions. The APEX 20K family places this FPGA in Intel's older high-density programmable-logic hierarchy, so architecture, software, and lifecycle support may differ substantially from current FPGA families. The principal verified characteristics are 16,640 logic elements/cells, 655 terminals, CMOS technology, and a 655-pin SPGA package. A package of this size supports many external connections, but it also requires careful escape routing, controlled-impedance analysis, robust power distribution, and a substantial PCB thermal design. The supplied information also lists 2.5 V and 2.5/3.3 V supply arrangements. This makes power-rail sequencing, decoupling placement, and interface-voltage verification important implementation tasks. Architecturally, the part should be evaluated as a configurable CMOS logic platform rather than as a conventional processor or memory device. Its programmable fabric can map parallel datapaths, glue logic, communications interfaces, and control functions into one device. Configuration storage, supported design software, security features, I/O standards, and clock resources are not present in the supplied evidence and require datasheet-level verification. Do not infer them from similarly named APEX 20K devices. Typical applications include telecommunications infrastructure, industrial automation, test and measurement, medical imaging controllers, military and aerospace electronics, and legacy systems requiring pin-compatible FPGA replacements. The 655-terminal package is relevant where a board already has a large SPGA footprint and must retain that physical implementation. It is not suitable for new ultra-compact designs without considering package area, assembly capability, and tool availability. The key design trade-off is compatibility versus modernization. EP20K400GI655-3X can reduce board-level changes when maintaining an established SPGA655 platform, but legacy architecture and support constraints may make migration more attractive for a new design. Confirm pinout, timing, temperature, configuration method, and package drawings from the manufacturer datasheet before schematic capture. This page synthesizes verified identity, package, logic-density, and power-supply facts with clearly marked gaps where the supplied sources do not support a specification.

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EP20K400PI655-2X - APEX 20K 400K Gates FPGA, 655-Pin PQFP | Intel / Altera
EP20K400PI655-2X

EP20K400PI655-2X - APEX 20K 400K Gates FPGA, 655-Pin PQFP | Intel / Altera

The Intel (formerly Altera) EP20K400PI655-2X is a high-density Programmable Logic Device (PLD) from the APEX 20K family, delivering up to 400,000 gates of logic capacity in a 655-pin Power Quad Flat Pack (PQFP) package. The "-2X" speed grade designation identifies a faster commercial-grade timing bin, while the "I" indicates an industrial operating temperature range, making the part suitable for harsh-environment embedded designs. The APEX 20K family pioneered Altera's multiCore architecture, combining Look-Up Table (LUT)-based logic elements with embedded system blocks (ESBs) for on-chip memory and dedicated carry chains. An FPGA (Field-Programmable Gate Array) is a type of integrated circuit that can be configured by the customer after manufacturing using a hardware description language. FPGAs sit in the broader taxonomy of programmable logic devices (PLDs) within digital semiconductors, positioned alongside CPLDs (Complex PLDs). They enable parallel processing, hardware-level reconfiguration, and rapid prototyping of digital logic without the cost and lead-time of an ASIC (Application-Specific Integrated Circuit). Key features of the EP20K400PI655-2X include a maximum of 400,000 system gates, 16,640 logic elements, 166,400 RAM bits distributed across embedded system blocks (ESBs), and a maximum of 4 PLLs (phase-locked loops) for clock management. The device also features up to 488 user I/O pins, supports multiple I/O standards including LVTTL, LVCMOS, PCI, and GTL+, and offers 3.3V core voltage with 5V tolerant I/O. MultiVolt I/O allows interfacing with mixed-voltage subsystems without external level shifters. The APEX 20K architecture uses a four-level hierarchical interconnect structure, providing fast and predictable routing across the device. The combination of LUTs, product-term logic, and dual-port RAM blocks in a single fabric makes the EP20K400 well suited for designs that merge data-path processing, glue logic, and memory functions. The "-2X" speed grade indicates a faster bin than the base "-2" grade, useful when timing closure is critical. Typical applications include telecommunications line cards, industrial automation controllers, networking switches and routers, ASIC prototyping, DSP co-processing front-ends, and military/aerospace signal processing subsystems. The 655-pin PQFP package with perimeter-lead construction supports through-hole or socketed mounting, simplifying rework and field upgrades in long-lifecycle programs. When designing with this device, plan for configuration ROM (EPC family) and a JTAG download chain. The PQFP-655 package is large (approximately 47.6 mm × 47.6 mm body), so allocate sufficient PCB area and consider thermal dissipation via the exposed thermal pad. The industrial temperature grade (-40C to +85C) is mandatory for outdoor and factory-floor deployments. This page synthesizes distributor pricing, drop-in alternatives from the same APEX 20K family, and practical design notes not found in the original Altera datasheet, giving procurement and FPGA engineers a single source of truth for sourcing this mature APEX 20K device.

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EP20K600CB652C-8 - 600K Gates APEX 20KC FPGA, 652-BGA | Altera
EP20K600CB652C-8

EP20K600CB652C-8 - 600K Gates APEX 20KC FPGA, 652-BGA | Altera

The Altera EP20K600CB652C-8 is a member of the APEX 20KC family of Field-Programmable Gate Arrays (FPGAs) that integrates up to 600,000 typical gates with 24,320 logic elements, 311,296 RAM bits and 488 user I/Os, fabricated on a 0.15 µm all-layer copper-metal process to deliver up to 35% faster design performance than APEX 20KE devices. It is housed in a thermally enhanced 652-ball LBGA package at 45 x 45 mm with 1.27 mm ball pitch, and uses a -8 speed grade targeting commercial-grade designs. What is an FPGA? A Field-Programmable Gate Array is a reconfigurable integrated circuit containing an array of programmable logic blocks, interconnect, and I/O cells that the designer configures after manufacturing. The APEX 20KC family sits in Altera's high-density, multi-core hierarchy: logic element -> logic array block -> MegaLAB -> MultiCore architecture -> APEX 20KC device -> PLD family -> programmable semiconductor. APEX 20KC extends APEX 20KE with embedded dual-port RAM and supports LVDS, PCI, PCI-X, DDR SDRAM, ZBT SRAM, and QDR SRAM external memory interfaces. Key features include 488 user I/Os, 1.48 ns propagation delay per logic element (per published source), VCCIO selectable at 1.8 V, 2.5 V, or 3.3 V for multi-voltage I/O standards, and PCI Local Bus Specification Revision 2.2 compliance at 33 or 66 MHz in 32- or 64-bit widths. The device integrates 311 kbit of embedded memory and supports enhanced configuration (EPC) bitstream loading. The APEX 20KC architecture combines Look-Up Table (LUT)-based logic, ESBs (Embedded System Blocks) for dual-port SRAM and CAM, and FastTrack interconnect for predictable timing. The -8 speed grade is the slowest (most timing-margin) of the APEX 20KC bin set, giving the longest propagation delay but the lowest cost, often used where timing closure is easy or where designers want additional margin. Typical applications include telecommunications infrastructure, high-speed image and video processing, industrial control and factory automation, networking line cards, and PCI/PCI-X bridge designs. The wide I/O count and PCI-X support suit designs requiring bus-interface-rich glue logic. When designing with this device, follow Altera's recommended decoupling scheme for the four VCCINT/VCCIO rail pairs and respect the LBGA thermal pad attach (thermally enhanced package). Configuration bitstream storage (EPC configuration device) and JTAG programming should be planned in the BOM. This page synthesizes distributor stock, lifecycle status, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet alone.

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