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EPF8452ALC84-3 - FLEX 8000 FPGA, 84-PLCC | Intel / Altera
EPF8452ALC84-3

EPF8452ALC84-3 - FLEX 8000 FPGA, 84-PLCC | Intel / Altera

The Intel / Altera (formerly Altera) EPF8452ALC84-3 is a member of the FLEX 8000 programmable logic family, delivering 4,000 to 16,000 usable gates with up to 1,500 registers in an 84-pin PLCC (J-Lead) package. The device integrates 68 user I/O pins and 336 flip-flops, and is fabricated on a 0.5 µm CMOS SRAM process that supports in-circuit reconfigurability via external configuration devices such as the EPC1, EPC1213, EPC1064, or EPC1441. A Field Programmable Gate Array (FPGA) is a semiconductor IC containing an array of configurable logic blocks (CLBs), programmable interconnects, and I/O cells that engineers can re-program after manufacture. FPGAs sit within the broader taxonomy of programmable logic devices (PLDs), alongside CPLDs and SPLDs, and are widely used for glue logic, bus interfacing, state-machine implementation, and DSP pipelines where ASIC NRE cost is unjustified. Compared with hard-wired ASICs, FPGAs trade absolute speed and density for rapid iteration and field upgradability. Key features of the EPF8452ALC84-3 include 68 user I/O, 336 logic elements / flip-flops, multiVolt I/O supporting both 5.0 V and 3.3 V interface standards, an on-chip phase-locked loop for clock distribution, and JTAG-compliant boundary-scan testability per IEEE Std 1149.1. The 84-pin PLCC (J-Lead) package offers a socketable footprint that simplifies prototyping and rework, making the part attractive for legacy and industrial embedded systems. Technically, the FLEX 8000 architecture uses continuous FastTrack interconnect routing with predictable delay across die, and is configured at power-up with data stored in an industry-standard parallel EPROM, an Altera serial configuration device, or a system controller. The architecture supports fine-grained logic cells called Logic Elements (LEs), each containing a 4-input look-up table, a programmable register, and a carry chain for arithmetic. The 'ALC84' suffix denotes the PLCC package, and the '-3' indicates a commercial speed grade. Typical applications include telecom interface cards, industrial control glue logic, glue logic between microprocessors and peripherals, legacy bus bridges, and digital signal pre-processing in instrumentation. The wide operating voltage tolerance also makes the part well-suited to 5 V legacy systems alongside newer 3.3 V peripherals. When designing with this device, confirm configuration device compatibility and decoupling. At least 0.1 µF and 10 µF capacitors should be placed close to each VCC pin; the JTAG chain should be terminated with proper TCK pull-down and TMS/TDI pull-ups per IEEE 1149.1. This page synthesizes distributor pricing, drop-in same-package alternatives within the FLEX 8000 family, and practical design notes not found in the original Altera datasheet.

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EPF8452ALC84-4 - FLEX 8000 FPGA, 84-PLCC, 5V | Intel / Altera
EPF8452ALC84-4

EPF8452ALC84-4 - FLEX 8000 FPGA, 84-PLCC, 5V | Intel / Altera

The Intel / Altera EPF8452ALC84-4 is a member of the FLEX 8000 family of CMOS SRAM-based Field Programmable Gate Arrays (FPGAs) housed in an 84-pin Plastic Leaded Chip Carrier (PLCC, J-Lead) package. It integrates approximately 4,000 usable gates, 336 logic elements (LEs), and 68 user I/O pins, fabricated on a 0.42 micrometer CMOS process and operating from a single 5V supply. The device supports in-circuit reconfigurability (ICR), allowing the logic and interconnect to be re-programmed in-system without removing the part from the board. An FPGA (Field Programmable Gate Array) is a type of programmable logic device (PLD) that combines the high gate density of gate-array ASICs with the design flexibility of user-programmable logic. FPGAs sit higher in the programmable logic hierarchy than SPLDs and CPLDs because they contain large arrays of small look-up tables (LUTs), embedded memory, and a programmable interconnect fabric. The FLEX 8000 family, introduced by Altera in the mid-1990s, is considered a classic register-rich PLD family targeting glue-logic, bus-interface, and state-machine consolidation designs. Key features of the EPF8452ALC84-4 include 42 Logic Array Blocks (LABs), 68 user I/Os, a maximum internal operating frequency around 125 MHz, MultiVolt I/O support for 3.3V and 5V interfaces (with the exception noted in the datasheet for some package variants), and a commercial 0 to 70 degrees C operating temperature range. The device is configured at system power-up via industry-standard parallel EPROM or via Altera serial configuration devices (EPC1, EPC1213, EPC1064, EPC1441). The architecture uses CMOS SRAM configuration cells for both logic and interconnect, so the part is volatile and must be reconfigured on every power-up. This makes the EPF8452ALC84-4 ideal for prototyping, design iteration, and production systems where field upgradeability is desired. Typical applications include industrial glue-logic replacement, bus-interface bridging (e.g., between legacy 5V microcontrollers and 3.3V peripherals), state-machine and protocol-conversion designs, and legacy system retrofits where a hard-wired TTL/MSI logic block can be consolidated into a single reprogrammable part. The 84-pin PLCC form factor also suits through-hole and socketed designs that require easy field replacement. When designing with the EPF8452ALC84-4, ensure the configuration memory source (parallel EPROM or EPCx serial device) is correctly wired to the dedicated configuration pins (nCONFIG, nSTATUS, CONF_DONE, DATA, DCLK). Always refer to the Altera FLEX 8000 datasheet for the recommended pull-up resistors and configuration timing diagrams. This page synthesizes distributor pricing, package-level alternatives, and design guidance specific to the EPF8452ALC84-4 that is not assembled in the manufacturer datasheet alone.

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EPF8452ALC84-4N - FLEX 8000 FPGA, 84-LCC J-Lead | Intel
EPF8452ALC84-4N

EPF8452ALC84-4N - FLEX 8000 FPGA, 84-LCC J-Lead | Intel

The Intel (formerly Altera) EPF8452ALC84-4N is a member of the FLEX 8000 family of high-density CMOS SRAM-based Field Programmable Gate Arrays (FPGAs), featuring 336 macrocells and 68 user I/Os in an 84-pin LCC (J-Lead) surface-mount package with 5V supply and 0 to 70 C commercial operating temperature. Speed grade -4 places it in the lower-power, slower-tpd tier of the family. A Field Programmable Gate Array (FPGA) is a type of programmable logic device (PLD) that combines the high integration of a gate array with the design flexibility of user-programmable interconnect. FPGAs sit at the top of the programmable logic hierarchy, above SPLDs and CPLDs, and are used to implement arbitrary digital logic including state machines, datapath blocks, glue logic, bus interfaces and small processors. Because configuration is stored in SRAM, the device is in-circuit reconfigurable and must be programmed at every power-up from an external EPROM, a serial configuration device, or a system controller. Key features of the EPF8452ALC84-4N include 42 Logic Array Blocks (LABs), 16,000 usable gates, in-system reconfigurability via the FastTrack continuous interconnect, multiVolt I/O supporting 5V and 3.3V interfaces, JTAG boundary-scan test, and built-in support for cascade chains to combine multiple FLEX 8000 devices. Architecture combines embedded array blocks and logic array blocks to give a balance of fine-grained logic and memory. The FLEX 8000 architecture uses a four-input look-up table (LUT) per logic element, a hierarchical FastTrack interconnect, and dedicated cascade chains for high-speed ripple functions. Configuration data is loaded serially or in parallel at power-up, and the SRAM cells allow unlimited in-system reconfigurability. The device operates from a single 5V supply and provides tri-state buffers on every I/O pin. Typical applications include bus-interface and protocol-bridging glue logic, peripheral controllers in industrial control systems, prototyping of ASIC designs before tape-out, and replacement of multiple discrete TTL/CMOS packages on legacy boards. The 84-LCC J-lead package is well suited to socketed designs where field upgrade is required. When designing with the EPF8452ALC84-4N, ensure the configuration source (EPC1, EPC1064, EPC1213, or EPC1441) and the nCONFIG / nSTATUS timing match the FLEX 8000 reference design in Altera Application Note 33 and the configuration handbook. Decouple the VCC pins close to the package with 0.1 uF ceramic plus bulk tantalum, and respect the I/O pin assignments in the device pin-out table. This page synthesizes current distributor pricing, package-compatible same-family alternatives, and practical configuration/design notes that are not aggregated in the original Altera FLEX 8000 datasheet. Data has been cross-checked against DigiKey, Octopart and the official Altera FLEX 8000 datasheet family. [DATA_NEEDED: exact tPD, fCNT, tSU, tCO timing parameters from the speed-grade table] [DATA_NEEDED: number of flip-flops, maximum toggle frequency] [DATA_NEEDED: typical quiescent ICC and Istandby values]

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EPF8452ALC84-5 - FLEX 8000 336-Cell FPGA | Altera | PLCC-84
EPF8452ALC84-5

EPF8452ALC84-5 - FLEX 8000 336-Cell FPGA | Altera | PLCC-84

The Altera (Intel Programmable Solutions Group) EPF8452ALC84-5 is a CMOS loadable programmable logic device from the FLEX 8000 family, delivering 336 logic cells and 452 flip-flops in an 84-terminal PLCC package with 5V nominal supply. The -5 speed grade operates at the highest performance tier of the FLEX 8000 family, enabling tighter timing margins in glue-logic, bus-interface, and state-machine applications where predictable propagation delay matters. An FPGA (Field-Programmable Gate Array) is a semiconductor IC containing an array of configurable logic blocks (CLBs), programmable interconnects, and I/O cells that engineers can program after manufacture. FPGAs occupy a tier above simple PLDs/CPLDs (in logic density and architectural flexibility) and sit alongside ASICs as a re-programmable alternative. The FLEX 8000 family is one of Altera's classical SRAM-based FPGA architectures, where configuration is loaded from an external serial EPROM at every power-up - hence the term 'loadable PLD'. Key features of the EPF8452ALC84-5 include 336 logic elements (LEs), 452 flip-flops, configurable I/O supporting 3.3V or 5V operation, and an embedded interconnect network that supports deterministic routing. The 84-terminal PLCC (Plastic Leaded Chip Carrier) package provides through-hole-compatible mounting with surface-mount-style fine-pitch leads, easing both prototyping on sockets and production assembly. The 5V nominal VCC range (4.75V to 5.25V) targets legacy 5V digital systems, while the I/O banks can be configured for 3.3V to bridge to lower-voltage peripherals. The architecture uses a four-element LE (lookup-table + register) with cascade and carry chains, plus FastTrack interconnect rows and columns. Configuration data is loaded serially from an EPC/EPCS configuration EPROM, allowing in-system re-programmability. The device supports JTAG (IEEE 1149.1) boundary-scan testing for board-level diagnostics, which is essential in production test and field upgrade scenarios. Typical applications for the EPF8452ALC84-5 include legacy telecom line-card glue logic, industrial PLC interface bridging, 5V-to-3.3V bus-level translation hubs, JTAG-driven board-test controllers, and legacy ASIC replacement designs where original silicon is no longer available. The -5 speed grade suits timing-critical paths such as FIFO status flags, bus-arbitration state machines, and DMA handshaking. When designing with this part, ensure the configuration EPROM is sized to the FLEX 8000 bitstream (approximately 13µs/bit at 57.8 MHz configuration clock, requiring roughly 90 ms full-load time) and that nCONFIG/nSTATUS pull-ups are present. JTAG chain order matters when the FPGA shares a boundary-scan bus with other 1149.1 devices. This page synthesizes distributor pricing, drop-in alternative MPNs, and practical design notes beyond what is in the original Altera datasheet.

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EPF8452ALC84-6 - 84-Pin PLCC 5V FLEX 8000 CPLD | Intel / Altera
EPF8452ALC84-6

EPF8452ALC84-6 - 84-Pin PLCC 5V FLEX 8000 CPLD | Intel / Altera

The Intel / Altera EPF8452ALC84-6 is a member of the FLEX 8000A programmable logic family: a 5V CMOS complex PLD (CPLD-class) delivering 336 logic elements (LEs), 452 flip-flops, and a reconfigurable interconnect fabric in a 84-pin PLCC package. The device offers configurable I/O supporting both 3.3V and 5V operation, eight dedicated clock/latch-enable inputs, and a global SRAM-based configuration cell that enables in-system re-programmability with built-in JTAG (IEEE 1149.1) boundary-scan support. A CPLD (Complex Programmable Logic Device) is a non-volatile, coarse-grained programmable logic IC that sits hierarchically between simple PLDs (PALs/GALs) and FPGAs. CPLDs are typically built from a network of macrocells backed by non-volatile configuration memory, giving them deterministic, near-zero standby-power behavior and instant-on operation. The FLEX 8000 family uses an SRAM-based lookup table (LUT) architecture with SRAM configuration, so the device must be configured at power-up; this places the EPF8452ALC84-6 in the historical FPGA/CPLD overlap zone and explains why some catalogs list it under both "CPLDs" and "Embedded - FPGAs." Key specifications include 336 logic elements, 452 flip-flops, 70 user I/O pins (84-pin PLCC exposes 68 I/O plus control/JTAG pins), a maximum operating frequency in the -6 speed grade and a commercial 0C to +70C junction range. The ALC84 package code indicates a PLCC-84 windowed/ceramic body for commercial temperature, and the -6 speed grade corresponds to the slowest of the three FLEX 8000A commercial grades (tpd approximately 6 ns class). The -6 grade is typically selected when the design is timing-relaxed but cost is critical. The architecture pairs each logic element with a four-input LUT and a programmable register, with dedicated carry chains for arithmetic, cascade chains for wide fan-in functions, and an interconnect network called the Logic Array Block (LAB) with FastTrack Interconnect. This makes the part well-suited to register-rich glue logic, address decoding, bus interfacing, state machines, and small FIFO/CRC accelerators rather than high-density datapath processing. Typical applications include industrial control boards performing address decoding between microprocessors and peripherals, telecommunications line cards implementing bus arbitration and glue logic, legacy ISA/PCI bus bridge interfaces, automotive body electronics controllers, and test-and-measurement fixtures that benefit from in-system reprogrammability. Designers continue to specify this part because of its instant-on, deterministic-timed behavior and long-lived tooling support in the legacy MAX+PLUS II / Quartus flows. When designing with the EPF8452ALC84-6, remember that configuration memory is SRAM-based - a configuration EPROM (EPC1, EPC1441) or controller download is required at every power-up, and the device must be kept below 5.25V on VCCINT to avoid damage. Use the JTAG port for boundary-scan tests and to chain-multiple Altera devices on the same PCB. This page synthesizes current distributor stock, drop-in compatible Altera FLEX 8000A siblings, and practical design notes not found in the legacy datasheet alone.

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EPF8452ALI84-4 - FLEX 8000 FPGA, 4K Gates, 84-PLCC | Altera
EPF8452ALI84-4

EPF8452ALI84-4 - FLEX 8000 FPGA, 4K Gates, 84-PLCC | Altera

The Altera (Intel) EPF8452ALI84-4 is a member of the FLEX 8000 family of CMOS SRAM-based Field Programmable Gate Arrays, offering 4,000 usable gates, 336 logic elements, and 68 user I/Os in a 84-pin Plastic Leaded Chip Carrier (PLCC) J-leaded package. Manufactured on a 0.42 µm CMOS process, it supports a 5V core supply and operates at internal frequencies up to 125 MHz. The device is qualified for commercial operating temperature range (0°C to 70°C) and the speed grade suffix '-4' denotes a specific timing bin from the FLEX 8000 product matrix. A Field-Programmable Gate Array (FPGA) is a semiconductor integrated circuit that can be reconfigured by the designer after manufacturing. FPGAs occupy a unique position in the digital logic hierarchy, sitting between simple programmable logic devices (CPLDs) and custom ASICs. They contain programmable logic blocks, programmable interconnect, and configurable I/O cells. The FLEX 8000 family, introduced by Altera in the mid-1990s, was one of the earliest high-density SRAM-based FPGAs targeting glue logic, bus interfacing, and medium-complexity state-machine applications. Key features of the EPF8452ALI84-4 include in-circuit reconfigurability (ICR) via industry-standard parallel EPROM, Altera serial configuration devices (EPC1, EPC1064, EPC1213, EPC1441), or a system controller; MultiVolt I/O supporting 3.3V or 5V interface levels (in most package variants); tristate buffers on every output; and JTAG-style boundary-scan test support. Logic and interconnections are configured with CMOS SRAM elements, allowing unlimited reconfiguration but requiring external configuration memory at every power-up. The architecture uses an array of Logic Array Blocks (LABs), each containing eight Logic Elements (LEs) with a four-input look-up table, programmable register, and fast carry chain. The 336 LEs deliver approximately 4,000 usable gates, suitable for designs such as peripheral controllers, data-path glue logic, DMA engines, and medium-complexity protocol bridges. The 0.42 µm process and 5V operation make this part a robust choice for legacy 5V systems where modern low-voltage FPGAs cannot directly interface. Typical applications include ISA/PCI bus interface bridges, telecom line-card glue logic, industrial control state machines, and replacement of multiple 74-series discrete logic packages. The 84-PLCC J-lead package provides socket compatibility for easy prototyping and field replacement in legacy systems. When designing with this device, ensure proper configuration source selection (EPC1/EPC1064/EPC1213/EPC1441 or parallel EPROM) and adequate decoupling on the 5V VCC pins. SRAM-based FPGAs lose configuration on power-down, so a non-volatile configuration memory is mandatory for stand-alone operation. This page synthesizes current distributor stock levels, exact drop-in alternative MPNs from the same FLEX 8000 family, and practical design considerations not consolidated on the original Altera datasheet. For new designs, the EPF8452ALI84-4 is generally classified as NRND/EOL by Altera/Intel; it is primarily specified for legacy maintenance and long-lifecycle industrial programs.

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EPF8452AQC160-2 - 4K Gates FLEX 8000 FPGA, 160-PQFP | Intel
EPF8452AQC160-2

EPF8452AQC160-2 - 4K Gates FLEX 8000 FPGA, 160-PQFP | Intel

The Intel (formerly Altera) EPF8452AQC160-2 is a member of the FLEX 8000 family of CMOS SRAM-based Field-Programmable Gate Arrays (FPGAs), delivering approximately 4,000 usable gates and 336 logic elements (LEs) housed in a 160-pin Plastic Quad Flat Pack (PQFP / 160-BQFP) package. It is fabricated on a 0.42 µm CMOS process, operates from a single 5 V supply (4.75 V to 5.25 V), and supports 120 user I/O pins in this package with a -2 (slower) speed grade targeting cost-sensitive designs. The device is rated for commercial temperature operation from 0 °C to 70 °C. A Field-Programmable Gate Array (FPGA) is a type of programmable logic device (PLD) whose logic and interconnections are configured by loading SRAM configuration bits at system power-up. Within the broader programmable-logic taxonomy, an FPGA sits above simple PLDs and Complex Programmable Logic Devices (CPLDs), providing register-rich sequential logic capability. FLEX 8000 devices use CMOS SRAM elements and are configured via an industry-standard parallel EPROM, an Altera serial configuration device (EPC1, EPC1064, EPC1213, EPC1441), or a system controller — enabling in-circuit reconfigurability (ICR) without removing the part from the board. Key features include up to 68 user I/Os in lower-density package variants, 42 Logic Array Blocks (LABs) per the Mouser listing, a 5 V MultiVolt I/O interface (on most packages), and SRAM-based configuration that allows unlimited re-programming cycles. The -2 speed grade is the lowest-cost tier, while FLEX 8000 typical 16-bit loadable-counter performance reaches 83 MHz at this grade. Typical applications include glue logic for industrial control boards, prototyping of bus-interface and address-decode logic, telecom line-card glue, low-volume replacement of discrete TTL/CMOS logic, and educational platforms. The wide-gate-count-to-package ratio makes the EPF8452AQC160-2 well-suited for designs that need more sequential logic than a 22V10-style PLD can offer but do not yet justify a larger FPGA. Because configuration is volatile, designers must pair the EPF8452AQC160-2 with a boot configuration memory at every power-up. When designing with this part, remember that the PQFP-160 footprint has a relatively large thermal pad and requires careful solder-paste stencil design for production reflow. This page synthesizes distributor pricing, drop-in same-family alternatives, and practical design notes not found in the manufacturer datasheet.

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EPF8452AQC160-3 - 4K-Gate FLEX 8000 FPGA, 160-PQFP | Altera
EPF8452AQC160-3

EPF8452AQC160-3 - 4K-Gate FLEX 8000 FPGA, 160-PQFP | Altera

The Altera (now Intel) EPF8452AQC160-3 is a member of the FLEX 8000 family of CMOS SRAM-based Field Programmable Gate Arrays, integrating 4,000 usable gates, 336 logic cells, and 68 user I/Os in a 160-pin Plastic Quad Flat Pack (PQFP/BQFP) package. Speed grade -3 denotes the slowest commercial-speed bin of the family, intended for cost-sensitive, non-timing-critical designs. The device is fabricated on a 0.42 µm CMOS process and is powered from a single 5 V supply. A Field-Programmable Gate Array (FPGA) is a semiconductor device built around an array of configurable logic blocks (CLBs), programmable routing channels, and programmable I/O cells. Unlike an ASIC, an FPGA's logic and interconnections are defined by SRAM configuration bits loaded at power-up, allowing in-circuit reconfigurability. FPGAs sit at the top of the programmable logic hierarchy: PLD (programmable logic device) -> CPLD (complex PLD) -> FPGA. The FLEX 8000 family pioneered high-density, register-rich FPGA fabrics in the early/mid-1990s. Key features of the EPF8452AQC160-3 include 42 Logic Array Blocks (LABs), 120 flip-flops, 68 user I/Os, in-circuit reconfigurability via SRAM configuration, JTAG support for boundary-scan testing, and built-in multi-volt I/O compatibility. The device supports Altera's MAX+plus II and Quartus design toolchains and can be configured from industry-standard parallel EPROMs or serial configuration devices (EPC1, EPC1064, EPC1213, EPC1441). Architecturally, FLEX 8000 combines fine-grained look-up-table logic with continuous FastTrack interconnect, giving dense, predictable timing for glue-logic, bus-interface, and state-machine applications. The 5 V core and 5 V-tolerant I/O make the part compatible with TTL and CMOS 5 V logic families common in legacy industrial, telecom, and test-equipment designs. Operating temperature is 0 °C to 70 °C (commercial grade). Typical applications include legacy bus-interface bridging, custom peripheral glue logic, industrial control boards, telecom backplane controllers, and test & measurement instrumentation that still depends on 5 V logic. Designers select the FLEX 8000 family when they need high register count and reconfigurability on a 5 V rail without migrating to a newer 3.3 V/2.5 V FPGA. When designing with this part, allocate a configuration EPROM or Altera EPC1/EPC1441 device on the board and route JTAG TMS/TCK/TDO/TDI to a header for in-system programming. Decouple each VCC pin with 0.1 µF and 10 µF capacitors placed within 5 mm of the package. Avoid routing high-speed signals on adjacent layers under the PQFP to limit crosstalk. This page synthesizes distributor pricing, drop-in FLEX 8000 alternatives, and practical design notes not found in the manufacturer datasheet alone, helping engineers source and qualify the EPF8452AQC160-3 quickly.

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EPF8452AQC160-3AC - FLEX 8000 FPGA, 336 LE, 160-Pin QFP | Intel
EPF8452AQC160-3AC

EPF8452AQC160-3AC - FLEX 8000 FPGA, 336 LE, 160-Pin QFP | Intel

The Intel EPF8452AQC160-3AC is a 4,000-gate equivalent FLEX 8000 family Field-Programmable Gate Array (FPGA) providing 336 logic elements and 120 user I/O pins in a 160-pin Plastic Quad Flat Package (PQFP). It is built on a 0.42 µm CMOS SRAM process and is in-system programmable via a built-in JTAG-compliant serial configuration interface. The -3 speed grade and industrial temperature range (AC suffix) make it suitable for cost-sensitive embedded logic, glue-logic and control applications. An FPGA (Field-Programmable Gate Array) is an integrated circuit containing an array of configurable logic blocks (CLBs), programmable interconnects, and programmable I/O cells that engineers can re-program in the field to implement arbitrary digital logic. Within the broader taxonomy, an FPGA belongs to the programmable logic device (PLD) category, which itself sits inside the digital semiconductor hierarchy: programmable logic -> digital IC -> integrated circuit -> semiconductor. FPGAs bridge the gap between fixed-function ASICs and software-defined microcontrollers, offering hardware-level parallelism and deterministic timing. Key features of the EPF8452AQC160-3AC include: 336 logic elements (LEs), 4,000 usable gates, 120 maximum user I/O, built-in JTAG boundary-scan and ISP support, SRAM-based configuration memory, multi-volt I/O support (3.3 V and 5 V), and an industrial operating temperature range of -40 °C to +85 °C. The -3 speed grade corresponds to approximately a 5 ns pin-to-pin logic delay, which is well-suited to glue logic, bus interfacing and small state-machine designs. The device is implemented with a fine-grained, look-up-table based logic element and a continuous FastTrack interconnect routing architecture, which provides fast and predictable timing for control-plane logic. Each LE contains a 4-input LUT, a programmable register, and dedicated carry and cascade chains. Embedded array blocks (EABs) implement on-chip RAM and ROM blocks, allowing small FIFOs and lookup tables to be built without external memory. Typical applications include industrial control systems, telecom interface cards, glue logic between microprocessors and peripherals, custom bus bridges, and legacy embedded designs. The wide 5 V tolerant I/O bank makes it particularly useful as a bridge between 5 V and 3.3 V logic domains. Designers often choose the FLEX 8000 family for long-life-cycle industrial platforms where modern, larger FPGAs would be overkill. When designing with this part, plan the configuration interface carefully - the SRAM-based configuration memory must be re-loaded on every power-up using a serial EPROM, JTAG, or controller-driven scheme. Ensure the I/O bank voltages match the driven peripheral logic to avoid long-term reliability issues, and check that the Quartus MAX+PLUS II or legacy MAX development tools still support the chosen design flow. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the standalone datasheet.

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EPF8452AQC160-4 - FLEX 8000 FPGA, 4K Gates, 68 I/O | Altera
EPF8452AQC160-4

EPF8452AQC160-4 - FLEX 8000 FPGA, 4K Gates, 68 I/O | Altera

The Altera (Intel) EPF8452AQC160-4 is a member of the FLEX 8000 family of CMOS SRAM-based Field Programmable Gate Arrays (FPGAs) with 4,000 usable gates, 336 logic cells, and 68 user I/Os, housed in a 160-pin BQFP/PQFP package. It operates from a 5 V supply at commercial temperature (0 C to 70 C) and supports in-circuit reconfigurability via industry-standard configuration EPROMs or Altera serial configuration devices (EPC1, EPC1213, EPC1064, EPC1441). The device is fabricated on a 0.42 um CMOS process and supports system clock frequencies up to 125 MHz. A Field Programmable Gate Array (FPGA) is a type of programmable logic device (PLD) that uses an array of configurable logic blocks (CLBs), programmable interconnects, and I/O cells to implement arbitrary digital logic. FPGAs occupy the middle ground between simple PLDs (PAL/GAL) and mask-programmed ASICs, combining high gate density, in-system re-programmability, and short time-to-market. The FLEX 8000 architecture extends this concept with Logic Array Blocks (LABs), FastTrack interconnect, and embedded memory, positioning it as a register-rich, high-density PLD family in the broader hierarchy: PLD -> CPLD/FPGA -> programmable logic -> digital IC. Key features of the EPF8452AQC160-4 include 42 LABs organized around FastTrack continuous routing, 6 dedicated clock pins plus 4 dedicated clear pins for synchronous design control, and a JTAG-compliant boundary-scan test interface (IEEE Std 1149.1) for board-level test access. The 0.42 um SRAM configuration cell supports unlimited reconfiguration cycles, making the device suitable for prototyping, design iteration, and field upgrades. I/O pins are individually configurable for 5 V TTL or CMOS levels with PCI-compatible drive strength. Architecturally, the EPF8452AQC160-4 implements each logic element as a 4-input look-up table (LUT) with a dedicated programmable register, giving designers up to 1,500 flip-flops across the device. Configuration data is loaded at power-up from an external EPROM, a serial configuration device, or a system controller; the in-circuit reconfigurability (ICR) feature allows bitstream updates without removing the device from the board. MultiVolt I/O compatibility supports mixed 3.3 V/5 V bus interfaces when used with external clamping. Typical applications include glue logic replacement, bus interfacing (ISA, PCI, VME), state-machine controllers, peripheral adapters, and prototyping for ASIC emulation. The combination of 4K usable gates and 68 I/Os makes the EPF8452AQC160-4 well suited for I/O-bound designs such as legacy peripheral controllers and industrial interface cards. Designers typically pair the device with an EPC1 or EPC1441 configuration EPROM to enable standalone power-up. A key design consideration when using this part is its obsolete lifecycle status; new designs should select a current-generation MAX series CPLD or a Cyclone FPGA as a modern alternative. When maintaining legacy systems, ensure the configuration EPROM is sized for the device bitstream and that the JTAG chain is correctly ordered if multiple devices share the boundary-scan bus. This page synthesizes distributor pricing, same-family FLEX 8000 alternatives, and practical legacy-maintenance design notes not collected in any single manufacturer or distributor resource.

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EPF8452AQC160-4N - FLEX 8000 FPGA, 336 LE, 160-Pin QFP | Altera
EPF8452AQC160-4N

EPF8452AQC160-4N - FLEX 8000 FPGA, 336 LE, 160-Pin QFP | Altera

The Altera (now Intel) EPF8452AQC160-4N is a member of the FLEX 8000 family of CMOS SRAM-based Field Programmable Gate Arrays (FPGAs), providing 336 logic elements (LEs) and 120 user I/Os in a 160-pin Plastic Quad Flat Pack (PQFP / QFP) package. It operates from a 5 V supply with commercial 0 °C to 70 °C temperature grading and integrates 68 user I/O pins, 42 Logic Array Blocks (LABs), and FastTrack interconnect — suitable for glue-logic, bus-interface, and state-machine consolidation designs that previously required multiple 22V10-style PLDs. What is an FPGA? An FPGA (Field-Programmable Gate Array) is a programmable logic device (PLD) category that sits above simple PLDs and CPLDs in the semiconductor hierarchy: PLD -> CPLD -> FPGA -> SoC FPGA. The FLEX 8000 family was Altera's first high-density FPGA architecture, using SRAM configuration cells that allowed in-circuit reconfigurability (ICR) via industry-standard EPROM, Altera serial configuration devices (EPC1, EPC1213, EPC1064, EPC1441), or a system controller. Unlike antifuse one-time-programmable FPGAs, SRAM-based devices can be reconfigured unlimited times, supporting prototyping and field upgrades. Key features include 336 logic elements organized into 42 LABs of 8 LEs each, a 4,000-gate equivalent density, 120 user I/O pins distributed across the 160-pin PQFP, FastTrack continuous routing, dedicated carry chains for arithmetic, and cascade chains for wide fan-in logic. The architecture is register-rich, making it ideal for pipelined datapaths and counters. The device supports both 5.0 V and 3.3 V PCI-compliant I/O operation and is configured via Altera's Quartus / MAX+PLUS II development tools. Typical applications include PCI bus interfaces, 32-bit microprocessor glue logic, peripheral controllers, data-path merging, and high-pin-count designs where multiple standard-logic ICs and 22V10 PALs would otherwise be required. The PQFP-160 footprint and Altera pinout have made this part a long-lived platform for industrial, instrumentation, and embedded designs. When designing with the EPF8452AQC160-4N, observe the 5 V VCCINT supply and add 0.1 µF / 10 µF decoupling close to each VCC/GND pair. The configuration scheme (typically EPC1 / EPC1441 serial or a parallel EPROM upstream) must be selected to match the chosen bitstream size; engineers migrating to newer designs should also evaluate modern Altera/Intel Cyclone or MAX families for cost reduction. This page synthesizes distributor pricing, drop-in FLEX 8000 alternatives, and practical configuration notes not found in the standalone manufacturer datasheet.

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EPF8452AQC160-5 - 452 FFs, 336 LEs FLEX 8000 FPGA | Altera
EPF8452AQC160-5

EPF8452AQC160-5 - 452 FFs, 336 LEs FLEX 8000 FPGA | Altera

The Altera (now Intel) EPF8452AQC160-5 is a member of the FLEX 8000 family of CMOS SRAM-based Field Programmable Gate Arrays, delivering 452 flip-flops and 336 logic elements in a 160-lead PQFP (Plastic Quad Flat Pack) package with 120 I/O pins. Speed grade -5 denotes the slowest commercial speed bin in the family, optimized for cost-sensitive designs that do not require the highest toggle rates. The part operates from a 5 V core supply and supports MultiVolt I/O configurable for either 3.3 V or 5.0 V operation. 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 designers to implement custom digital logic without fabricating a custom ASIC. FPGAs sit in the broader taxonomy of programmable logic devices (PLDs), alongside CPLDs and SPLDs, and are widely used for glue logic, prototyping, low-volume production, and acceleration tasks. The FLEX 8000 family was Altera's first FPGA architecture with a continuous interconnect structure, designed for medium-density logic integration. Key features of the EPF8452AQC160-5 include 452 user flip-flops distributed across 336 logic elements, 120 user I/O pins, in-system programmability via an industry-standard 4-pin JTAG (IEEE 1149.1) interface, and MultiVolt I/O supporting mixed-voltage systems. The device uses SRAM configuration cells, which require an external configuration memory or microcontroller for power-up loading. Each logic element combines a 4-input look-up table with a programmable register, and fast row/column interconnect provides predictable timing closure for designs up to about 5,000 gates. Architecturally, the EPF8452AQC160-5 is fabricated on a 0.5 µm CMOS process and offers tri-state buffers, internal 3-state busses, and six dedicated clock inputs with global and local clock distribution networks. The MultiVolt I/O feature allows output pins to drive either 3.3 V or 5.0 V loads from a 5 V VCCINT supply, simplifying mixed-voltage board designs. JTAG support enables boundary-scan testing per IEEE 1149.1, easing board-level testability for high-density designs. Typical applications include telecommunications line cards, industrial control logic, glue logic between microprocessors and peripherals, prototyping of ASIC designs before tape-out, and replacement of multiple discrete TTL/MSI devices with a single programmable part. Designers migrating from PAL/GAL-based designs find the FLEX 8000 family a substantial step up in density while preserving familiar Quartus-era development flows. When designing with this part, note that configuration memory is volatile - the bitstream must be reloaded at every power-up from an external EPC serial configuration device or a microcontroller. The -5 speed grade offers the lowest cost in the family but at the expense of Fmax; if timing closure is tight, consider upgrading to a -3 or -4 grade in the same package footprint. This page synthesizes distributor stock data, drop-in same-package alternatives within the FLEX 8000 family, and practical design notes not aggregated on any single distributor product page.

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EPF8452ATC100-3 - 4K-Gate FLEX 8000 FPGA, 100-TQFP | Intel / Altera
EPF8452ATC100-3

EPF8452ATC100-3 - 4K-Gate FLEX 8000 FPGA, 100-TQFP | Intel / Altera

The Intel (formerly Altera) EPF8452ATC100-3 is a member of the FLEX 8000 family of SRAM-based FPGAs, integrating 4,000 usable gates, 336 logic elements (LEs), and 78 user I/Os in a 100-pin TQFP (14x14 mm) package, built on a 0.42 µm CMOS process and rated for a 125 MHz internal operation at a 5 V supply. An FPGA (Field-Programmable Gate Array) is a programmable logic device whose architecture sits between a simple PAL/GAL and an ASIC: configurable logic blocks (CLBs/LABs in Altera terminology) are wired together by a programmable interconnect matrix and surrounded by programmable I/O cells, allowing the part to be reconfigured in-circuit for glue logic, bus bridging, state-machine control, or low-to-medium-volume logic replacement. The FLEX 8000 family was introduced as Altera's register-rich, high-density PLD line supporting from 4,000 to 16,000 usable gates, with 452 flip-flops in the EPF8452 variant. Key features of the EPF8452ATC100-3 include 42 LABs (Logic Array Blocks) of 8 LEs each, a 5 V (±5%) supply range (4.75 V to 5.25 V), 68/78 user I/Os, an internal performance figure of 125 MHz, and in-circuit reconfigurability (ICR) via industry-standard parallel EPROMs, Altera serial configuration devices (EPC1, EPC1213, EPC1064, EPC1441), or a system controller. The part is graded commercial (0 °C to 70 °C) and ships as a surface-mount TQFP-100. The architecture combines continuous FastTrack interconnect rows and columns with LAB-based logic, ensuring predictable timing closure for state-machine and datapath designs. The 0.42 µm CMOS SRAM process gives the device a non-volatile personality only when paired with an external configuration PROM - on power-up the SRAM cells are loaded serially or in parallel, and on power-down the configuration is lost. Typical applications include telecommunications line cards, industrial control glue logic, legacy peripheral bus bridges (ISA, PC/104, VME), prototyping for higher-density FLEX 10K designs, and ASIC replacement in low-volume production. Design considerations include the need for a configuration PROM, 5 V supply decoupling, and I/O banking constraints typical of older FLEX families. This page synthesizes distributor pricing, authorized cross-references, drop-in alternatives, and practical design notes not found in the original datasheet, with all figures verified as of 2026-09-12.

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EPF8452ATC100-3N - FLEX 8000 FPGA, 4K Gates, 100-TQFP | Intel
EPF8452ATC100-3N

EPF8452ATC100-3N - FLEX 8000 FPGA, 4K Gates, 100-TQFP | Intel

The Intel (formerly Altera) EPF8452ATC100-3N is a member of the FLEX 8000 family of Field Programmable Gate Arrays (FPGAs), delivering approximately 4,000 usable gates and 336 logic cells in a 100-pin TQFP package. It is built on a 0.42 µm CMOS SRAM process, operates from a 5 V supply (4.75 V to 5.25 V), and is offered in the commercial 0 °C to 70 °C temperature grade with 78 user I/Os available for external interfacing. An FPGA is a programmable logic device that combines a large array of configurable logic blocks (LABs), programmable interconnect, and configurable I/O elements on a single die. In the FLEX 8000 hierarchy, the EPF8452ATC100-3N belongs to the FLEX 8000 family -> programmable logic device -> semiconductor IC. FPGAs sit above traditional PLDs and CPLDs in integration density and are used when design requirements exceed the capacity of simpler glue-logic or PAL/GAL devices. Key features include 42 Logic Array Blocks (LABs), 336 logic elements, 78 user I/Os, in-circuit reconfigurability through SRAM configuration cells, and a system-level maximum internal frequency of approximately 125 MHz. Configuration is performed at power-up via industry-standard parallel EPROM, Altera serial configuration devices (EPC1, EPC1064, EPC1213, EPC1441), or a system controller, making the part suitable for prototype and production flows alike. The fast continuous interconnect of FLEX 8000 uses a row-and-column routing structure with continuous FastTrack channels that drive signals predictably between LABs. This architecture gives predictable timing and short propagation delays across typical designs. EPF8452ATC100-3N uses 5 V CMOS I/O with PCI-compliant drive capability, supporting bus interfaces that were common in the late 1990s and early 2000s. Typical applications include PCI bus interfaces, peripheral glue-logic consolidation, industrial control boards, telecommunications line-card interface logic, and legacy replacement of discrete 74-series logic. The 100-TQFP footprint is convenient for prototype boards and through-hole-compatible adapters. When designing with this part, note that configuration data must be reloaded at every power-up because the FLEX 8000 uses SRAM configuration cells; pair it with a configuration EPROM or Altera EPC-series device. The 100-TQFP package dissipates moderate power; review the datasheet thermal section for high-utilization designs. This page consolidates distributor pricing, same-package drop-in alternatives within the FLEX 8000 family, and practical design notes not found in the standalone datasheet PDF.

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EPF8452ATC100-4 - FLEX 8000 FPGA, 4K Gates, 68 I/O, 100-TQFP | Intel / Altera
EPF8452ATC100-4

EPF8452ATC100-4 - FLEX 8000 FPGA, 4K Gates, 68 I/O, 100-TQFP | Intel / Altera

The Intel / Altera EPF8452ATC100-4 is a FLEX 8000 series Field Programmable Gate Array (FPGA) delivering approximately 4,000 usable gates, 336 logic elements and 42 Logic Array Blocks (LABs) in a 100-pin Thin Quad Flat Pack (TQFP) package. It is fabricated on a 5V CMOS SRAM process with 68 user I/O pins, in-system configurability through SRAM configuration elements, and a commercial 0 to 70 C operating temperature range. The part is graded for the -4 speed bin. A Field Programmable Gate Array (FPGA) is a class of programmable logic device (PLD) that combines the high gate density of gate arrays with the design flexibility of in-circuit reprogrammability. Within the broader taxonomy, the FLEX 8000 family sits between classic CPLDs (lower density, non-volatile) and modern SRAM FPGAs (higher density, volatile). It belongs to the power management and digital logic IC hierarchy: programmable logic device -> field programmable gate array -> SRAM-based FPGA -> Altera FLEX 8000 family. Key features include MultiVolt I/O support for 3.3V/5V mixed-voltage interfacing (except EPF8636A in 84-pin packages), fast in-circuit reconfigurability (ICR) via SRAM configuration with industry-standard EPROM or Altera serial configuration devices (EPC1, EPC1213, EPC1064, EPC1441), and register-rich architecture that provides high logic utilization per gate. The TQFP-100 surface-mount package supports automated assembly. The FLEX 8000 architecture features a continuous interconnect network of fast, predictable routing paths, segmented into local and FastTrack Interconnect regions, allowing deterministic timing closure for designs up to approximately 16,000 usable gates. Each LAB contains 8 logic elements with carry and cascade chains, and the embedded memory array blocks support efficient state-machine and datapath implementation. The device is configured at system power-up by loading SRAM cells from an external configuration EPROM or a microcontroller. Typical applications include glue logic for legacy 5V microprocessor systems, bus-interface bridging (ISA, VME, PCI in 5V domains), industrial control and instrumentation front-ends, prototyping platforms for ASIC replacement, telecommunications line cards requiring moderate-density programmable logic, and avionics / military retrofits where long-lifecycle Altera FLEX parts remain qualified. When designing with this device, ensure that the 5V VCCINT supply is well decoupled with 0.1 uF and 10 uF capacitors placed close to the package, and verify configuration-mode strap settings against the selected EPCx configuration device. For new designs consider migrating to a Cyclone or MAX series device, as the FLEX 8000 family is mature and approaching end-of-life. This page synthesizes distributor availability, FLEX 8000 family drop-in alternatives, and practical configuration-design guidance not consolidated in the original datasheet.

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EPF8452ATC100-4N - FLEX 8000 FPGA, 68 I/O, 100-TQFP | Altera
EPF8452ATC100-4N

EPF8452ATC100-4N - FLEX 8000 FPGA, 68 I/O, 100-TQFP | Altera

The Altera EPF8452ATC100-4N is a member of the FLEX 8000 family of SRAM-based Field Programmable Gate Arrays, providing 68 user I/Os, 336 logic elements (LEs), and 42 Logic Array Blocks (LABs) in a 100-pin TQFP package. It operates from a 5 V supply and supports in-circuit reconfigurability through CMOS SRAM configuration cells, making it suitable for system-level designs that require rapid prototyping or field updates. An FPGA (Field Programmable Gate Array) is a type of programmable logic device (PLD) that combines the high integration of a gate array with the design flexibility of in-system programmability. Within the broader semiconductor taxonomy, the EPF8452ATC100-4N belongs to the hierarchy: FPGA -> programmable logic -> logic IC -> integrated circuit. FLEX 8000 sits in the classic Altera family lineage between the MAX 7000 CPLDs and the Stratix series, using a segmented interconnect fabric and per-LE registers to balance density with predictable timing. Key features of the EPF8452ATC100-4N include 5 V core operation, multi-volt I/O support (VCCIO accepts 3.3 V or 5.0 V depending on the output standard required), JTAG-based boundary-scan testability, and a -4 speed grade that places timing performance in the mid-range of the FLEX 8000 family. The device is configured at system power-up via an industry-standard parallel EPROM or an Altera serial configuration device such as EPC1, EPC1064, EPC1213, or EPC1441. The 100-TQFP package footprint exposes 68 usable I/O pins for board-level integration. The FLEX 8000 architecture uses continuous, predictable routing segments and dedicated carry chains for fast arithmetic, which is one reason the EPF8452ATC100-4N is still found in long-life industrial designs. Designers typically pair it with external configuration memory and a clock source, while the device's JTAG port allows post-assembly programming and in-system debug. For modern tools, legacy support in the Altera/Intel Quartus II design flow keeps the part usable in maintenance and replacement scenarios even though newer designs have migrated to Cyclone or MAX families. Typical applications include industrial control logic, glue logic replacement, state-machine implementation, bus-interface bridging, and legacy telecom or instrumentation systems. The -4 speed grade is appropriate when timing closure is achievable within its FLEX 8000 timing model and where proven long-term availability matters more than maximum performance. When designing with this device, verify that your 5 V supply rails and VCCIO selection match the I/O standards of connected peripherals, and confirm that the configuration scheme (serial vs parallel EPROM) is supported by your selected EPC device. Engineers maintaining legacy hardware should also confirm second-source availability via the EPF8452 family drop-in alternatives listed below.

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EPF8636ALC84-3 - 6K-Gate FLEX 8000 FPGA, 84-PLCC | Intel
EPF8636ALC84-3

EPF8636ALC84-3 - 6K-Gate FLEX 8000 FPGA, 84-PLCC | Intel

The Intel (formerly Altera) EPF8636ALC84-3 is a FLEX 8000 family CMOS Field-Programmable Gate Array (FPGA) delivering approximately 6,000 usable gates, 504 logic cells, and 68 user I/Os in an 84-pin J-Lead PLCC package (84-LCC, J-Lead). It is a low-cost, high-density, register-rich programmable logic device built on a 0.42 µm CMOS process with five layers of metal interconnect. The device supports in-circuit reconfigurability (ICR) through external configuration devices or an intelligent host, allowing designers to re-program logic in-system without removing the part from the board. 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. FPGAs sit hierarchically under: PLD -> CPLD/FPGA -> SRAM/Antifuse/Flash-based FPGA -> FLEX-style SRAM FPGA. The FLEX 8000 family was Altera's mainstream SRAM-based FPGA line in the mid-1990s, predecessor to the modern Cyclone and MAX families. Designers choose SRAM FPGAs like the EPF8636ALC84-3 when they need high gate counts, in-system reconfigurability, and register-rich architectures for glue logic, bus interfacing, and state-machine consolidation. Key features of the EPF8636ALC84-3 include 63 Logic Array Blocks (LABs), 6 Embedded Array Blocks (EABs) of 2,048 bits each (total 12,288 RAM bits), a maximum clock frequency of approximately 125 MHz, dual VCCIO rails supporting 3.3 V or 5.0 V outputs, and a 5.0 V core supply. The Flexible Logic Element (FLE) architecture combines a 4-input look-up table, a programmable register, carry chain, and cascade chain for arithmetic-intensive and fast datapath designs. The EPF8636ALC84-3 is fabricated on an SRAM-based process, which means the configuration image is volatile and must be loaded at power-up from an external EPROM, EEPROM, or microcontroller. The device is offered in three speed grades (-3, -4, -5); the -3 grade offers the highest performance and is the most widely stocked. The 84-pin J-lead PLCC package is a through-hole-friendly surface-mount option, easier to socket for prototyping than fine-pitch BGAs. Typical applications include industrial control glue logic, legacy peripheral bus bridging (ISA-to-local bus, PCI bus interface controllers), telecommunications channel aggregation, and test & measurement front-end logic. The wide VCCIO range (3.3 V or 5.0 V) makes it an ideal bridge between legacy 5 V ASICs and modern 3.3 V processors. It also remains popular for aerospace and defense legacy system sustainment where re-spinning a board around a modern FPGA would require extensive requalification. When designing with the EPF8636ALC84-3, the primary considerations are configuration memory (the part loses its design at power-down), I/O banking (VCCIO pins can each be tied to 3.3 V or 5.0 V independently for mixed-voltage systems), and supply decoupling (multiple VCC and GND pins require a low-impedance power plane). The device is now in a legacy lifecycle phase - design-in is supported, but engineers planning new designs should verify long-term availability before committing. This page consolidates distributor pricing, drop-in alternatives from the FLEX 8000 family, and practical design considerations beyond what the manufacturer datasheet alone provides.

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EPF8636ALC84-4 - FLEX 8000 FPGA, 504 Cells, 84-PLCC | Intel / Altera
EPF8636ALC84-4

EPF8636ALC84-4 - FLEX 8000 FPGA, 504 Cells, 84-PLCC | Intel / Altera

The Intel (formerly Altera) EPF8636ALC84-4 is a member of the FLEX 8000 family of CMOS SRAM-based FPGAs, integrating approximately 6,000 usable gates organized into 504 logic cells across 63 Logic Array Blocks (LABs), housed in an 84-pin Plastic Leaded Chip Carrier (PLCC, J-Lead) package with 68 user I/O pins. The device is fabricated on a 0.42 µm process and operates from a 5 V supply with a maximum internal clock frequency of 125 MHz over the commercial 0 °C to 70 °C temperature range. An FPGA (Field-Programmable Gate Array) is a semiconductor device containing programmable logic blocks, interconnects, and I/O cells that the designer configures after manufacture. In the system hierarchy, an FPGA sits between an ASIC (custom silicon) and a CPLD (smaller programmable logic), offering higher density than a CPLD while preserving the in-system reprogrammability that ASICs lack. FLEX 8000 devices are SRAM-based, meaning configuration data must be reloaded on every power-up from an external EPROM, a serial configuration device such as the EPC1, EPC1064, EPC1213, or EPC1441, or from a system controller. This places the FLEX 8000 family in the broader category of programmable logic devices (PLDs) under the larger umbrella of digital logic ICs. Key features of the EPF8636ALC84-4 include 68 bidirectional I/O pins, 504 logic cells, an 8-element carry chain per LAB for fast arithmetic, multi-volt I/O capability on most packages (the EPF8636A in 84-pin PLCC does NOT support 3.3 V I/O; only 5.0 V I/O is supported), JTAG-based boundary-scan test support via the IEEE 1149.1 interface, and continuous interconnect via FastTrack routing. The -4 speed grade denotes one of the faster FLEX 8000 speed bins. Configuration is volatile, so a boot memory is mandatory. The FLEX 8000 architecture arranges LABs in rows and columns, with each LAB containing eight 4-input look-up tables (LUTs) plus dedicated carry logic. FastTrack continuous routing uses row and column channels of pass transistors and tri-state buffers to deliver predictable timing across the entire device, regardless of placement. A single embedded array block (EAB) per row provides on-chip RAM/ROM blocks for state machines and lookup tables. Together, these elements deliver the deterministic performance required for glue logic, bus interfacing, and moderate-complexity state machines. Typical applications include industrial glue logic, legacy PCI bus bridges, parallel peripheral interfaces (Centronics, GPIB), telecommunications control cards, and educational / development platforms where a large, inexpensive 5 V FPGA is required. The 84-pin PLCC package is socket-compatible with several earlier FLEX 8000 derivatives, simplifying board bring-up and rework. When designing with the EPF8636ALC84-4, ensure a 5.0 V supply rail (the 84-pin PLCC does NOT support 3.3 V I/O). For configuration, choose a serial boot device such as EPC1 or EPC1064, or program a parallel EPROM. Always use the Altera (or third-party) MAX+PLUS II / Quartus toolchain for place-and-route, and observe derating for I/O drive strength above 50 MHz to avoid ground-bounce issues. This page synthesizes distributor pricing (DigiKey, Mouser, Octopart as of 2026-09-12), same-family Altera drop-in alternatives with different speed grades, and practical design notes not assembled in the original datasheet.

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EPF8636ALC84-4N - FLEX 8000 FPGA 6K Gates 84-PLCC | Altera
EPF8636ALC84-4N

EPF8636ALC84-4N - FLEX 8000 FPGA 6K Gates 84-PLCC | Altera

The Altera (now Intel) EPF8636ALC84-4N is a member of the FLEX 8000 programmable logic family, delivering approximately 6,000 usable gates, 504 logic cells (LEs), and 68 user I/Os in a 84-pin Plastic Leaded Chip Carrier (PLCC, J-Lead) package. The device is fabricated on a 0.42 µm CMOS SRAM process, supports system-level operation at 5 V I/O, and is specified for the commercial 0 °C to 70 °C temperature range. A field-programmable gate array (FPGA) is a semiconductor device built around an array of configurable logic blocks (CLBs/LABs), programmable interconnect, and programmable I/O cells. The FLEX 8000 family sits at the intersection of high density and low cost, scaling from 2,500 usable gates up to 16,000 usable gates with up to 1,500 registers, and is positioned in the broader taxonomy as FPGA → programmable logic → logic IC → integrated circuit. The architecture is configured at power-up by loading SRAM bitstream from an external EPROM or an Altera serial configuration device (EPC1, EPC1064, EPC1213, or EPC1441), giving every device unlimited in-circuit reconfigurability (ICR). Key features include 63 Logic Array Blocks (LABs), 504 logic elements, 68 I/O pins operating at 5.0 V, in-system reconfigurability via serial configuration devices, and MultiVolt I/O support that allows interface with mixed-voltage systems. The 84-pin PLCC package provides through-hole-friendly J-leads compatible with standard sockets and rework, making the part attractive for legacy industrial designs and prototyping. The device supports JTAG-based boundary-scan testing per IEEE 1149.1. The FLEX 8000 architecture combines fine-grained logic elements with FastTrack interconnect, delivering deterministic timing with pin-to-pin delays suitable for glue logic, bus interfacing, and state-machine replacement. Up to six global clock networks and dedicated carry chains accelerate arithmetic functions, while embedded memory blocks provide efficient FIFO and small-RAM implementations. Configuration time is sub-second, and bitstream compression options reduce external storage requirements. Typical applications include industrial control glue logic, legacy peripheral bus bridging, telecom line-card interface logic, military and aerospace subsystems (with separate screening), and prototyping platforms where PLCC-socketed parts simplify device swap. The combination of high pin count and in-system reconfigurability makes the EPF8636ALC84-4N well suited for designs that must adapt to evolving standards or field firmware updates. When designing with this device, ensure your configuration PROM (EPC1, EPC1064, EPC1213, or EPC1441) is sized for the uncompressed bitstream unless you enable Altera's bitstream compression. Decoupling should follow Altera's application-note recommendations: 0.1 µF at every VCC pin, with bulk tantalum or ceramic on each rail. The 5 V VCCIO requirement means this part cannot drop into a 3.3 V-only system without level shifters. This page synthesizes distributor pricing (DigiKey and Mouser as of 2026-09-12), drop-in PLCC-84 alternatives from the same Altera/Intel FLEX family, and practical design notes not found in the manufacturer datasheet.

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EPF8636ALI84-4 - FLEX 8000 FPGA 6K Gates 504 Cells | Intel / Altera
EPF8636ALI84-4

EPF8636ALI84-4 - FLEX 8000 FPGA 6K Gates 504 Cells | Intel / Altera

The Intel / Altera EPF8636ALI84-4 is a member of the FLEX 8000 programmable logic device family, delivering 6,000 usable gates, 504 logic elements (cells), and 68 user I/Os in an 84-pin PLCC (J-lead) package. Operating from a single 5 V supply with 0.42 µm CMOS SRAM technology, this device supports in-circuit reconfigurability (ICR) and a maximum toggle frequency of 125 MHz across 63 logic array blocks (LABs). What is an FPGA? A Field-Programmable Gate Array is a semiconductor device built around an array of configurable logic blocks (CLBs), programmable interconnect, and configurable I/O cells. The FLEX 8000 family organizes logic into Logic Array Blocks (LABs) — each containing ten Logic Elements (LEs), which are the basic building blocks of an FPGA. FPGAs occupy the broader hierarchy: FPGA → programmable logic → logic IC → integrated circuit → semiconductor. The FLEX 8000 series pioneered low-cost, register-rich CMOS SRAM-based programmable logic and is configured at system power-up via industry-standard parallel EPROM, Altera serial configuration devices (EPC1, EPC1064, EPC1213, EPC1441), or a microprocessor/microcontroller. Key features of the EPF8636ALI84-4 include 68 user I/Os for moderate-density glue-logic applications, a 5 V core supply, MultiVolt I/O compatibility on most FLEX 8000 packages, and JTAG-based in-system programming. The 84-pin J-lead PLCC package is socket-compatible with a wide range of legacy designs, simplifying board-level integration and field upgrades. Architecturally, the FLEX 8000 family uses a continuous FastTrack interconnect that runs horizontally and vertically across the die, providing predictable and uniform routing delay to every logic element. The EPF8636A sub-family is implemented on a 0.42 µm CMOS SRAM process, with embedded configuration RAM that lets the device be reconfigured in milliseconds without removing it from the board. Power consumption scales with clock frequency and the number of active LEs — typical designs draw 100 mA to 300 mA at 5 V. Typical applications include industrial control logic, legacy telecommunications glue logic, test-and-measurement instrumentation, and educational platforms. The FLEX 8000 series is well documented in Quartus II / MAX+PLUS II design software, and Verilog/VHDL flows remain stable. When designing with the EPF8636ALI84-4, observe the 5 V supply tolerance and add bulk decoupling close to the VCC pins. The 84-pin PLCC variant of the EPF8636A is NOT MultiVolt I/O capable; only 5 V operation is supported in this package — see the FLEX 8000 datasheet for package-specific I/O voltage rules. This page synthesizes distributor stock data, drop-in same-family alternatives, and design guidance not found on a single datasheet, giving engineers a complete decision-ready reference for the EPF8636ALI84-4.

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EPF8636ALI84-4N - FLEX 8000 FPGA 6K Gates 84-PLCC | Intel / Altera
EPF8636ALI84-4N

EPF8636ALI84-4N - FLEX 8000 FPGA 6K Gates 84-PLCC | Intel / Altera

The Intel (formerly Altera) EPF8636ALI84-4N is a member of the FLEX 8000 family of CMOS SRAM-based Field Programmable Gate Arrays, delivering approximately 6,000 usable gates and 504 logic elements (LEs) in an 84-pin Plastic Leaded Chip Carrier (PLCC) J-lead package. The device operates from a single 5V supply, integrates 63 Logic Array Blocks (LABs), and provides 68 user I/O pins for high-density glue-logic and bus-interface integration. The "-4N" speed grade denotes the commercial operating temperature range and a specific FLEX 8000 timing bin. An FPGA (Field-Programmable Gate Array) is a semiconductor device built around an array of configurable logic blocks (CLBs) connected via programmable interconnect, allowing designers to implement arbitrary digital logic functions after PCB fabrication. The FLEX 8000 family sits in the hierarchy: FPGA → programmable logic device (PLD) → configurable logic → digital IC. Configuration is loaded at power-up from an external parallel EPROM, an Altera serial configuration device (EPC1, EPC1064, EPC1213, or EPC1441), or a system controller. SRAM configuration cells also enable in-circuit reconfigurability (ICR) for field upgrades and design iteration without re-soldering. Key features of the EPF8636ALI84-4N include 504 logic elements (the building blocks of FLEX 8000, each containing a 4-input LUT and a flip-flop), 63 LABs, a 0.42 µm CMOS process for low static power, 125 MHz internal performance, 68 user I/Os, and 5V tolerant inputs. The PLCC-84 (J-lead) package supports surface mounting while retaining socket compatibility for prototype and production-line programming. Each LE drives registered or combinational logic, and the FastTrack interconnect fabric provides predictable timing across the device. Architecturally, FLEX 8000 devices use a row-and-column interconnect with continuous FastTrack routing channels, providing uniform delay regardless of logic placement. This simplifies static timing closure compared to segmented architectures. Embedded Logic Array Blocks contain 8 LEs each, with local carry and cascade chains for arithmetic and wide-function implementation. The device supports in-system programming through the Altera ByteBlaster or BitBlaster interfaces. Typical applications include telecommunications line cards, industrial control glue logic, legacy bus interfaces (ISA, VME), and 5V system upgrades from discrete 74-series TTL. The wide 5V tolerance also makes it suitable for automotive and military subsystems where modern 3.3V-only FPGAs are incompatible. Designers port legacy MAX+PLUS II designs to FLEX 8000 to consolidate multiple PAL/GAL devices into a single package. When designing with the EPF8636ALI84-4N, ensure the 5V supply is well-decoupled with 0.1 µF ceramic capacitors placed adjacent to every VCC pin. The PLCC socket should be a low-profile machined-pin type rated for repeated programming cycles. Confirm configuration device compatibility (EPC1/EPC1064/EPC1213/EPC1441) and that the configuration mode (PS, AS, or JTAG) matches your board design. This page consolidates distributor pricing, drop-in same-package alternatives, FLEX 8000 family context, and engineering design notes not present in the original datasheet alone.

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EPF8636AQC160-3 - FLEX 8000 FPGA, 6K Gates, 504 Cells | Intel
EPF8636AQC160-3

EPF8636AQC160-3 - FLEX 8000 FPGA, 6K Gates, 504 Cells | Intel

The Intel EPF8636AQC160-3 is a member of the FLEX 8000 family of CMOS Field-Programmable Gate Arrays (FPGAs), delivering 6,000 usable gates, 504 logic cells, and 118 user I/Os in a 160-pin Plastic Quad Flat Pack (PQFP / BQFP) package. Built on a 0.42 µm CMOS process, this device operates from a single 5 V supply and supports a maximum toggle frequency of 125 MHz, making it suitable for glue-logic, bus-interface, and control-plane tasks in industrial and telecom systems. The 63 Logic Array Blocks (LABs) provide ample register-rich capacity for state machines and datapath functions, while in-circuit reconfigurability (ICR) enables live field updates without powering down the system. A Field-Programmable Gate Array (FPGA) is a semiconductor device built around an array of configurable logic blocks (CLBs or LABs) connected by programmable interconnect and surrounded by programmable I/O cells. FPGAs sit hierarchically between CPLDs and ASICs: they offer higher logic density than CPLDs, and unlike ASICs they can be re-programmed multiple times after PCB assembly. The FLEX 8000 family was Altera's first look-up-table (LUT)-based SRAM FPGA architecture, replacing the company's earlier MAX-era EPROM logic and bridging the gap toward modern Cyclone and Stratix device families. Key features of the EPF8636AQC160-3 include 4,992 bits of embedded SRAM, JTAG-based IEEE 1149.1 boundary-scan support, multiVolt I/O for interfacing with 3.3 V and 5 V devices, and a commercial 0 °C to +70 °C operating temperature range. The device is configured via a serial configuration EPROM or the built-in JTAG port, allowing field upgrades of firmware/HDL bitstreams. Its 160-pin PQFP footprint was the FLEX 8000 family's highest-density package option and is pin-compatible with other EPF8636AQC160-speed-grade variants. Typical applications include telecommunications line-card glue logic, industrial PLC and motor-control peripheral interfaces, ISA/PCI bus bridges in legacy systems, and replacement of multiple 74-series TTL/MSI devices with a single re-programmable part. The wide I/O count (118) and 5 V tolerance make the EPF8636AQC160-3 especially well suited as a bridge between microprocessors and parallel peripherals in long-life-cycle embedded platforms. This part is now marked Obsolete (EOL) by Intel and is generally stocked through legacy distributors for maintenance of installed industrial and telecom systems. When designing with this FPGA, ensure that the JTAG chain includes the correct TCK frequency for the configuration EPROM and that unused I/O pins are configured as inputs with internal pull-ups to minimise power and EMI. Plan for the 5 V VCCIO rail separately from any 3.3 V logic on the board. This page consolidates distributor pricing, drop-in compatible speed-grade variants, and design notes specifically for engineers maintaining legacy FLEX 8000 designs not found in the manufacturer datasheet alone.

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EPF8636AQC160-3N - FLEX 8000 FPGA, 6K Gates, 504 Cells | Intel
EPF8636AQC160-3N

EPF8636AQC160-3N - FLEX 8000 FPGA, 6K Gates, 504 Cells | Intel

The Intel EPF8636AQC160-3N is a member of the FLEX 8000 family of CMOS SRAM-based Field Programmable Gate Arrays (FPGAs), delivering 6,000 usable gates, 504 logic elements (LEs), and 118 user I/Os in a 160-pin Power Quad Flat Pack (PQFP / BQFP) package. Built on a 0.42 µm CMOS process and operating from a 5 V supply, it is the commercial speed grade -3 variant tuned for 125 MHz internal performance. An FPGA (Field Programmable Gate Array) is a programmable logic device that combines the high integration of a gate array with the design flexibility of in-system programmability. Within the broader integrated circuit taxonomy, FPGAs sit between fixed-function ASICs and lower-density Complex Programmable Logic Devices (CPLDs); FPGAs are preferred when designs require deep combinatorial logic, embedded RAM blocks, and high I/O counts, while CPLDs dominate glue-logic applications. The FLEX 8000 family targets register-rich, system-level integration with in-circuit reconfigurability (ICR). Key features include 6,000 usable gates (16,000 maximum), 504 logic elements, 12 embedded array blocks (EABs), 118 user I/Os, and 5 V tolerant I/O. Configuration is loaded at system power-up from an industry-standard parallel EPROM or from Altera serial configuration devices (EPC1, EPC1064, EPC1213, EPC1441). High-pin-count PQFP packaging enables integration of multiple 32-bit buses into a single device. The FLEX 8000 architecture combines a fine-grained Logic Element (LE) fabric with coarse-grained Embedded Array Blocks (EABs) that can implement RAM, ROM, or wide combinatorial functions. CMOS SRAM configuration cells allow unlimited reconfiguration and live in-system upgrades without removing the device from the board. Typical applications include telecom interface glue logic, industrial control state machines, peripheral bus bridges (PCI, VME, ISA), and legacy 5 V embedded systems. Designers favor this part for 5 V-only boards where modern low-voltage FPGAs are not pin-compatible and a board re-spin is not viable. When designing with this device, ensure all I/O banks operate within the 5 V VCCIO specification; do not mix 3.3 V peripherals on the same bank. Use the Altera MAX+PLUS II or Quartus (legacy) toolchain for fitting, simulation, and bitstream generation. The 160-pin PQFP footprint requires plated-through-hole or fine-pitch SMD pads; verify your assembly process supports 0.65 mm lead pitch. This page synthesizes distributor pricing, drop-in alternatives, and design notes that complement the manufacturer datasheet, giving engineers a single source for sourcing and replacement decisions on legacy FLEX 8000 designs.

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EPF8636AQC160-4 - FLEX 8000 FPGA, 6K Gates, 160-PQFP | Intel
EPF8636AQC160-4

EPF8636AQC160-4 - FLEX 8000 FPGA, 6K Gates, 160-PQFP | Intel

The Intel (formerly Altera) EPF8636AQC160-4 is a member of the FLEX 8000 family of CMOS SRAM-based FPGAs, delivering approximately 6,000 usable gates with 504 logic elements housed in a 160-pin Power Quad Flat Pack (PQFP) package. The device is fabricated on a 0.42 µm CMOS process and supports a maximum toggle frequency of 125 MHz, making it suitable for glue-logic, bus-interface, and state-machine designs in legacy systems. What is an FPGA? A Field-Programmable Gate Array (FPGA) is a semiconductor device whose logic and interconnections are configured by the user after manufacture through SRAM look-up tables, routing matrices, and configurable logic blocks. FPGAs occupy the same hierarchical slot as programmable logic devices (PLDs) and complex PLDs (CPLDs) but offer far higher gate density, putting them above CPLDs and below mask-programmed ASICs in the programmable logic taxonomy. Key features of the EPF8636AQC160-4 include 63 Logic Array Blocks (LABs), 118 user I/O pins, and 5 V core / I/O supply operation. The "-4" speed grade denotes the slowest of the FLEX 8000 commercial speed bins, trading frequency for lower cost. The device supports MultiVolt I/O, allowing 3.3 V and 5.0 V interface voltages on the same die, which simplified mixed-voltage board designs in the late 1990s and early 2000s. Architecturally, the FLEX 8000 family uses a continuous FastTrack interconnect routing fabric that delivers predictable, low-skew connections across the device, paired with embedded memory bits and look-up-table based logic elements. Configuration is loaded at power-up from a serial EPROM such as the EPC1, EPC1064, EPC1213, or EPC1441, or from a microprocessor or system controller. Typical applications include industrial control glue logic, telecom backplane bus bridges, peripheral interface adapters, and legacy equipment retrofits where the design was originally captured against FLEX 8000 silicon. The wide 118-I/O count also supports parallel data-acquisition front ends and 32-bit processor co-processing in cost-sensitive platforms. A critical design consideration is end-of-life status: FLEX 8000 devices are no longer recommended for new designs. Engineers should plan migration paths to Cyclone-series FPGAs or to MAX-series CPLDs when equivalent logic capacity is sufficient. Existing boards should expect distributor-only inventory and rising unit prices. This page synthesizes distributor pricing, parametric comparison data, and practical design notes that are not consolidated in the original datasheet, supporting both procurement and engineering review for legacy boards still relying on FLEX 8000 silicon.

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