FPGA & CPLD
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EPF8820AQC208-2N - 8K Gates FLEX 8000 FPGA | Altera | 5V
The Intel (formerly Altera) EPF8820AQC208-2N is a CMOS SRAM-based FLEX 8000 family FPGA with approximately 8,000 usable gates and 672 logic elements, packaged in a 208-pin Power Quad Flat Pack (PQFP/QFP). The device supports 152 user I/O pins, runs from a 5 V supply, and is fabricated on a 0.42 µm CMOS process node, achieving a maximum toggle frequency around 125 MHz with a propagation delay of roughly 5 ns. An FPGA (Field-Programmable Gate Array) is a programmable logic device that integrates configurable logic blocks, programmable interconnect, and I/O cells on a single die. Within the broader semiconductor taxonomy, FPGAs sit alongside CPLDs, microcontrollers, and ASICs as the dominant platforms for digital logic implementation. The FLEX 8000 family specifically targets register-rich, glue-logic and bus-integration applications, sitting hierarchically between low-density PLDs and high-density ASICs. Key features of the EPF8820AQC208-2N include 672 logic elements, 152 user I/O pins, JTAG-based in-system reconfigurability via the ByteBlaster interface, four dedicated fast inputs, multiVolt I/O support for 3.3 V and 5 V interfaces, and a global low-skew clock network. The device uses a continuous SRAM configuration architecture, so it must be configured at every power-up by an external EPROM, an Altera EPC1/EPC1441 configuration device, or a system controller. Architecturally, FLEX 8000 devices use a Logic Array Block (LAB) structure of 8 logic elements per LAB with shared carry chains and cascade paths, surrounded by a FastTrack Interconnect routing fabric. The embedded memory array holds the configuration bitstream, enabling live reconfiguration but making the part inherently volatile. The 5 V core and I/O operate at commercial temperature grade (0 to 70 °C), with the part produced under the FLEX 8000 family datasheet umbrella. Typical applications include high-speed bus bridges, peripheral controllers in telecom and networking, industrial machine control glue logic, prototyping for ASIC replacement, and bus-intensive designs such as 32-bit RISC/CISC peripheral glue. The 152 I/O pins accommodate multiple parallel buses in a single device, eliminating external bus-multiplexing logic. When designing with this part, ensure that configuration is supplied on every power-up using an EPC-series configuration device or microcontroller, and observe 5 V VCCINT and VCCIO decoupling guidelines. The part is EOL/legacy; new designs should consider Cyclone or MAX families.
EPF8820AQC208-3 - FLEX 8000 FPGA, 672 LEs, 208-PQFP | Altera
The Altera (Intel) EPF8820AQC208-3 is a member of the FLEX 8000 family of CMOS SRAM-based Field Programmable Gate Arrays (FPGAs), housed in a 208-pin Plastic Quad Flat Pack (PQFP) package with 152 user I/Os. It integrates 672 logic elements and 8,000 usable gates, organized into 84 Logic Array Blocks (LABs), and operates from a 5 V supply (4.75 V to 5.25 V). A Field Programmable Gate Array (FPGA) is a semiconductor IC built around an array of configurable logic blocks (CLBs/LABs) connected by programmable interconnect. FPGAs belong to the broader category of programmable logic devices (PLDs), which sit between fixed-function ASICs and discrete logic in the design hierarchy. Unlike gate arrays or standard-cell ASICs, FPGAs are reprogrammed in-circuit, accelerating prototyping and reducing non-recurring engineering (NRE) cost. The FLEX 8000 architecture combines a fine-grained logic fabric with dedicated FastTrack interconnect and a continuous SRAM configuration memory. Each LAB contains 8 logic elements (LEs) and local interconnect, while FastTrack rows and columns provide predictable, tpd-independent delays across the device. The EPF8820AQC208-3 also features built-in JTAG (IEEE 1149.1) boundary-scan support and in-circuit reconfigurability (ICR) via external EPROM (EPC1, EPC1064, EPC1213, EPC1441) or a system controller. Typical applications include glue-logic replacement, peripheral bus bridging, custom state-machine controllers, telecom interface glue, and industrial control front-ends. The 152 available I/Os at 5 V tolerance (commercial grade 0C to 70C) make it well suited to legacy TTL/CMOS bus interfaces. The device is also commonly deployed as a hardware accelerator for DSP pre/post-processing in cost-sensitive systems where modern FPGAs are over-spec. When designing with this part, note that the EPF8820AQC208-3 is marked Obsolete/EOL per the latest distributor listings; only remaining stock and refurbished supply are available. Designers should validate long-term availability for new production and consider modern Cyclone or MAX series as functionally equivalent drop-in alternatives where possible. This page synthesizes distributor pricing, pin-to-pin compatible alternatives from the Altera FLEX 8000 family, and design notes not found on the original Altera datasheet, including context on SRAM configuration and JTAG testing for legacy designs.
EPF8820AQC208-3N - FLEX 8000 FPGA 8K Gates 672 Cells | Altera
The Altera EPF8820AQC208-3N is a member of the FLEX 8000 programmable logic device family, integrating approximately 8,000 usable gates, 672 logic cells (LEs), and 152 user I/Os in a 208-pin FQFP (PQFP) package. It is fabricated on a 0.42 µm CMOS SRAM process and operates from a 5 V supply with a commercial 0 °C to 70 °C temperature range. An FPGA (Field-Programmable Gate Array) is a semiconductor IC whose logic and interconnect resources are configured by the end user via a bitstream loaded into on-chip SRAM configuration memory. FPGAs sit above CPLDs, ASSPs, and discrete logic in the programmable logic hierarchy and below custom ASICs in unit cost but above them in design flexibility and time-to-market. The FLEX 8000 family pioneered high-density, register-rich CMOS PLDs targeting glue logic, bus integration, and system-level integration that previously required multiple 32-bit bus devices in separate packages. Key features of the EPF8820AQC208-3N include in-circuit reconfigurability (ICR) via external configuration devices or a system controller, fast 16-bit loadable counter performance rated at 95 MHz, a 16-to-1 multiplexer delay of 7.9 ns at the -3 speed grade, and CMOS SRAM-based configuration elements that allow unlimited reconfiguration. The 152 user I/O count supports wide parallel bus interfaces, and the high-pin-count 208-FQFP package integrates multiple 32-bit buses into a single device. Configuration is performed at system power-up using data stored in an industry-standard parallel EPROM or via Altera EPC1, EPC1213, EPC1064, or EPC1441 serial configuration devices. Architecturally, FLEX 8000 devices use Logic Elements (LEs) tied together by a continuous FastTrack interconnect, with embedded array blocks (EABs) for memory-intensive functions. The 0.42 µm process supports up to 16,000 usable gates, and the speed grade -3N indicates the -3 speed bin (slower than -4) with N denoting a non-lead-free or commercial finish variant. Typical applications include industrial control, telecom interface cards, and legacy bus-bridge replacement. Typical applications include industrial automation control, legacy telecom interface cards, PCI bus bridges, glue-logic consolidation in 5 V industrial systems, and educational/hobbyist development platforms. The wide I/O count makes it suitable for interfacing with parallel SRAM, FIFOs, and microprocessors of its era. Design with care when migrating to modern 3.3 V systems; the 5 V I/Os are tolerant but not strictly 3.3 V-compliant. When designing with this FPGA, observe that configuration data is volatile and must be reloaded on every power-up. Ensure proper decoupling of VCCINT and VCCIO rails, and verify timing closure against the -3 speed grade rather than the -2 or -4 grades. For new designs, consider that FLEX 8000 is in legacy lifecycle status. This page synthesizes distributor pricing, same-family drop-in alternatives, FQFP-208 footprint compatibility data, and practical configuration-design notes not found in the original FLEX 8000 datasheet - useful for engineers maintaining legacy 5 V systems.
EPF8820AQC208-4 - FLEX 8000 FPGA, 672 Cells, 152 I/O, 5V | Intel
The Intel (formerly Altera) EPF8820AQC208-4 is a member of the FLEX 8000 family of CMOS Field-Programmable Gate Arrays, integrating 672 logic cells (8K usable gates) with 152 user I/Os in a 208-pin Power Quad Flat Pack (PQFP/BFQFP) package. The device is fabricated on a 0.42 µm CMOS process, supports a 5 V core supply, and operates at up to 125 MHz system frequency, making it suitable for high-volume glue-logic and bus-interface designs. A Field-Programmable Gate Array (FPGA) is a type of programmable logic device (PLD) that combines the density of gate arrays with the design flexibility of in-system reprogrammability. FPGAs occupy a tier between simple PLDs (PAL/GAL, CPLDs) and ASICs in the broader semiconductor hierarchy: programmable logic -> PLD -> CPLD/FPGA -> programmable semiconductor. The FLEX 8000 series was Altera's first generation of register-rich, SRAM-based FPGAs with in-circuit reconfigurability, marking a transition away from one-time programmable fuse-link devices. Key features of the EPF8820AQC208-4 include 84 Logic Array Blocks (LABs), 152 user I/O pins, MultiVolt I/O support for 3.3 V and 5.0 V interface operation, in-circuit reconfigurability (ICR) via external configuration devices, and a continuous commercial temperature range of 0 °C to 70 °C. The PQFP-208 package provides a robust gull-wing lead footprint compatible with standard surface-mount assembly lines. From an architectural standpoint, the EPF8820AQC208-4 uses an SRAM-based look-up-table (LUT) fabric with embedded register-rich LABs, a fast continuous interconnect network, and dedicated I/O cells supporting JTAG boundary-scan and MultiVolt I/O standards. In-circuit reconfigurability allows the device to be reprogrammed on the PCB without removing the part, a major advantage over fuse-based PLDs. Typical applications for the EPF8820AQC208-4 include industrial glue-logic replacement, PCI bus interface bridging, telecommunications line-card controllers, and legacy embedded control systems. The 152 I/Os make it attractive for designs that need to consolidate multiple discrete 74-series logic functions onto a single programmable device. When designing with this device, note that it is now a mature legacy part with limited distributor stock; engineers should verify long-term availability or plan a migration to a Cyclone-family replacement before entering volume production. The 5 V VCCIO option supports direct interfacing to legacy TTL/CMOS logic without level shifters. This page synthesizes distributor pricing, drop-in same-family alternatives, and design notes not found in the original FLEX 8000 datasheet, providing practical sourcing and engineering guidance for engineers maintaining legacy FLEX 8000 designs.
EPF8820ARC-4 - FLEX 8000 FPGA 672 Logic Elements | Altera
The Intel / Altera EPF8820ARC-4 is a member of the FLEX 8000 family of SRAM-based Field Programmable Gate Arrays (FPGAs) with 672 logic elements (LEs), 152 user I/O pins, and a -4 speed grade. According to the Altera FLEX 8000 datasheet, the EPF8820ARC-4 is supplied in a 208-pin BFQFP (R-C suffix) package and operates from a 5V VCCINT with 3.3V or 5V tolerant I/O, making it compatible with mixed-voltage legacy and 3.3V ASIC interfaces. A Field Programmable Gate Array (FPGA) is a programmable logic device containing an array of configurable logic blocks (CLBs), programmable interconnects, and configurable I/O cells. FPGAs sit in the broader hierarchy of programmable logic -> logic ICs -> integrated circuits -> semiconductors, and are used to implement arbitrary digital logic that can be reconfigured after manufacture. The FLEX 8000 family specifically targets glue logic, bus interface, and state-machine applications in telecom, industrial, and embedded systems. Key features of the EPF8820ARC-4 include 672 logic elements (LEs), 152 user I/O pins, an embedded array block (EAB) for memory functions, and a -4 speed grade providing a balance between timing performance and power. The device supports in-system programmability via the Altera BitBlaster or ByteBlaster download cable, and configuration can be stored in serial EPROM or via the passive serial / passive parallel asynchronous modes. Compared with smaller FLEX 8000 members, the EPF8820 provides more than 3x the logic density of the EPF8282 family. Architecturally, the EPF8820 uses Altera's Classic look-up table (LUT) approach combined with EAB blocks for efficient RAM/ROM implementation. The device is built on a 0.5 um CMOS SRAM process, which provides deterministic configuration and unlimited re-programmability but requires a configuration device at power-up. The 208-pin BFQFP package exposes both core and I/O power rails for noise decoupling. Typical applications include telecommunications line cards, industrial control glue logic, ASIC prototyping, and legacy bus-interface bridges. Designers select the EPF8820ARC-4 when they need medium logic density with a generous I/O count in a robust surface-mount plastic QFP. The FLEX 8000 family is widely supported by the Altera (now Intel) MAX+PLUS II and Quartus design tools. When designing with the EPF8820ARC-4, ensure a configuration EPROM (such as the Altera EPC1 or EPC2) is present at power-up since FLEX 8000 devices are SRAM-based and lose configuration when VCCINT drops. Decouple all VCCINT and VCCIO pins individually with 0.1 uF capacitors, and provide a minimum of 6 layers or a solid ground plane to suppress simultaneous switching noise on the 152 I/Os. Operating junction temperature must stay below 85C for commercial and 100C for industrial grades.
EPF8820ARC-4N - FLEX 8000 FPGA 672-Cell 5V | Intel (Altera)
The Intel (formerly Altera) EPF8820ARC-4N is a member of the FLEX 8000 family of CMOS SRAM-based Field Programmable Gate Arrays, integrating 8,000 usable gates and 672 logic elements in a 208-pin RQFP (Plastic Quad Flat Pack) package. Built on a 0.42 µm CMOS process and powered from a 5 V supply, the device is rated for operation up to 125 MHz and is intended for system-level logic integration where deterministic, reconfigurable hardware is required. FLEX 8000 devices are SRAM-based programmable logic devices (PLDs). They belong to the broader taxonomy of FPGAs -> programmable logic -> logic ICs -> integrated circuits. Unlike antifuse or flash FPGAs, FLEX 8000 SRAM cells must be configured at every system power-up using external memory, which makes them reconfigurable in-circuit but volatile. Within the family, the EPF8820 sits in the mid-density tier between the smaller EPF8282/EPF8452 and the larger EPF8636/EPF81188. Key features of the EPF8820ARC-4N include 672 logic elements (LEs), 152 maximum user I/O pins, an embedded array block for wide fan-in functions, FastTrack interconnect for predictable routing delays, and a 4-input look-up table (LUT) per logic element. The '-4N' speed grade combined with industrial temperature support (0 °C to +70 °C junction) makes the part a drop-in upgrade candidate for FLEX 8000 designs where timing closure is critical. The exposed pad on the RQFP-208 package provides an additional thermal dissipation path. The device is configured at power-up via an industry-standard parallel EPROM or via Altera's serial configuration devices EPC1, EPC1064, EPC1213, and EPC1441. After configuration, the SRAM cells define both the logic function and the interconnect, allowing full in-system reprogrammability. The architecture is supported by the Altera MAX+PLUS II and Quartus design toolchains, which accept schematics, VHDL, and Verilog HDL inputs. Typical applications include glue logic for legacy 5 V embedded systems, industrial control and instrumentation, bus-interface bridging, and ASIC prototyping where the design is intended to migrate to a hard-structured ASIC. The wide operating voltage and broad third-party IP ecosystem (UARTs, FIFOs, memory controllers) extend the device's usefulness to telecom, military, and avionics platforms where FLEX 8000 remains a long-lived standard. A key design consideration for EPF8820ARC-4N is the configuration memory interface: because the SRAM configuration is volatile, the board must include a configuration EPROM, a microcontroller loader, or a JTAG chain (IEEE 1149.1 boundary-scan) to reload the bitstream on every power-up. Designers should also budget for the 5 V I/O bank supply and ensure that all inputs stay within the 5 V tolerant range to avoid latch-up. This page synthesizes distributor pricing, drop-in FLEX 8000 family alternatives, and practical configuration/PCB layout notes not found in the manufacturer datasheet, giving engineers a single source for parametric, lifecycle, and replacement decisions.
EPF8820ARC160-2 - FLEX 8000 FPGA, 672 LE, 120 I/O, 160-BQFP | Intel
The Intel EPF8820ARC160-2 is a member of the classic FLEX 8000 family of SRAM-based, electrically reprogrammable FPGAs, delivering 8,000 typical gates with 672 logic elements (LEs) organized into 84 Logic Array Blocks (LABs) and providing 120 user I/O pins in a 160-pin BQFP (Metric Quad Flat Pack) surface-mount package. It operates from a single 5 V supply (4.75 V to 5.25 V), is specified over the commercial 0 °C to 70 °C temperature range, and is designed for high-volume glue-logic, bus-interface, and state-machine integration where ASIC NRE costs cannot be justified. What is a FLEX 8000 FPGA? FLEX 8000 is a legacy SRAM-based Field-Programmable Gate Array family introduced by Altera (now Intel PSG) in the mid-1990s. Hierarchically, FLEX 8000 sits between simple PLDs/CPLDs (small logic-only devices) and modern high-density SRAM FPGAs (Cyclone, MAX series): device -> FPGA -> programmable logic -> integrated circuit -> semiconductor. FPGAs contain configurable logic blocks (here, 4-LUT-based LEs grouped into LABs), programmable routing, and I/O cells; SRAM configuration makes them in-system reprogrammable but requires a configuration memory on every power-up. Key features include 120 user I/O pins supporting 5 V TTL/CMOS interfaces, on-chip SRAM-based configuration memory, multi-volt I/O compatibility, JTAG (IEEE 1149.1) boundary-scan test support, and a 4-input Look-Up Table (LUT) logic architecture. The part is built on a 0.5 µm CMOS SRAM process (Altera FLEX 8000 family), giving it non-volatile operation only when paired with an external configuration EPROM such as the EPC1 or EPC2. The device targets applications like industrial control glue logic, telecom line-card interface bridging, PCI bus interface bridging, custom peripherals for embedded microprocessors, and legacy replacement of 74-series and 4000-series MSI/LSI logic. With 120 I/O it can sink/source up to 25 mA per pin (typical) and supports PCI-compliant drive. When designing with EPF8820ARC160-2, plan for configuration: a serial configuration EPROM (EPC1/EPC2) or microcontroller must load the SRAM at every power-up. The 160-BQFP package has a footprint roughly 28 mm × 28 mm; provide four-layer PCB with solid ground and power planes for noise-sensitive applications. This page synthesizes distributor pricing, lifecycle status, and parametric comparison versus same-family Intel FLEX 8000 variants and cross-brand Xilinx XC3000/XC4000 equivalents - information that is not consolidated on any single distributor page.
EPF8820ARC208-2 - 8K-Gate FLEX 8000 FPGA 152 I/O | Altera
The Altera EPF8820ARC208-2 is a member of the FLEX 8000 family of CMOS SRAM-based Field Programmable Gate Arrays, integrating 672 logic cells, 152 user I/O pins, and approximately 8,000 usable gates in a 208-pin RQFP/BFQFP package with exposed thermal pad. It is fabricated on a 0.42 µm CMOS process, operates from a 5 V supply, and is rated for commercial-temperature operation with a -2 speed grade targeting 125 MHz internal performance. An FPGA (Field Programmable Gate Array) is a semiconductor device built around an array of configurable logic blocks (CLBs), programmable interconnects, and I/O cells. FPGAs sit between fixed-function ASICs and discrete logic: like an ASIC they implement arbitrary digital functions, but unlike an ASIC the design is loaded into on-chip SRAM at every power-up, enabling in-circuit reconfigurability (ICR). Within the broader taxonomy, EPF8820ARC208-2 belongs to PLD -> CPLD/FPGA -> SRAM-based FPGA -> high-density register-rich programmable logic family, a category historically used for glue logic, bus bridging, and state-machine consolidation in telecom, industrial, and computing designs. Key features include MultiVolt I/O operation (3.3 V or 5.0 V interface on all packages except 84-pin variants), in-system configuration via Altera EPC1/EPC1064/EPC1213/EPC1441 serial configuration devices or a microprocessor, 1,500 registers across the array, and JTAG-compliant boundary-scan test support. The Logic Array Blocks (LABs) and Enhanced Interconnect provide deterministic, predictable timing that Quartus and MAX+PLUS II development flows exploit for fast compile cycles. The architecture combines four Logic Elements per Logic Array Block, FastTrack continuous routing, and dedicated carry chains for arithmetic. Internal SRAM configuration memory is volatile, so an external configuration EPROM or controller must present the bitstream on each power-up; this is what makes FLEX 8000 devices in-circuit reconfigurable but also non-volatile-free in their default form. Typical applications include telecommunications line-card glue logic, industrial control and factory automation state machines, PCI/ISA bus bridges, video and image-processing data-path controllers, and legacy 5 V computing systems that require drop-in 5 V-tolerant I/O. The MultiVolt feature is particularly attractive in mixed-voltage designs (3.3 V core, 5 V peripherals). When designing with EPF8820ARC208-2, ensure the configuration scheme (EPC serial device, parallel EPROM, or microcontroller) is correctly dimensioned for the chosen bitstream size and that the exposed thermal pad is soldered to a sufficient copper pour to keep junction temperature within the commercial range. This page synthesizes Altera FLEX 8000 datasheet extracts, DigiKey/Mouser distributor pricing, drop-in same-family alternatives, and practical design considerations not found on any single manufacturer or distributor page.
EPF8820ARC208-24 - FLEX 8000 FPGA, 8K Gates, 672 Cells, 208-RQFP | Altera
The Altera EPF8820ARC208-24 is a member of the FLEX 8000 family of CMOS SRAM-based Field Programmable Gate Arrays (FPGAs) with 8,000 usable gates, 672 logic cells, and 152 user I/O pins in a 208-pin RQFP (Plastic Quad Flat Pack) package with exposed pad. It is built on a 0.42 µm CMOS process, supports a 5 V core supply (4.75 V to 5.25 V), and is offered in a -24 speed grade. 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 field-programmability of a PLD. The FLEX 8000 architecture sits in the hierarchy as follows: logic cell -> Logic Array Block (LAB) -> row/column interconnect -> FLEX 8000 device -> programmable logic -> semiconductor IC. Compared to simple PLDs (SPLDs/CPLDs), FPGAs provide higher logic density, more registers, and richer interconnect, at the cost of higher unit price and the need for an external configuration memory. Key features of the EPF8820ARC208-24 include in-circuit reconfigurability (ICR) via Altera EPC1, EPC1064, EPC1213, and EPC1441 serial configuration devices, MultiVolt I/O supporting 3.3 V and 5.0 V interface operation, a built-in Joint Test Action Group (JTAG) boundary-scan test interface, and a typical toggle frequency up to 125 MHz. The architecture is register-rich, making it well-suited to pipelined datapaths, state machines, and bus interfaces. Typical applications include industrial control glue logic, telecommunications interface cards, glue logic for ASIC prototyping, and bus-bridging interfaces (for example, between a microprocessor and a peripheral bus). Designers migrating legacy FLEX 8000 designs to newer process nodes typically pair the EPF8820ARC208-24 with the MAX+PLUS II or Quartus design environment to retain bitstream compatibility. When designing with this device, pay attention to the 5 V supply rail tolerance and the need for a dedicated configuration PROM or microcontroller at power-up. Because the FLEX 8000 family is in production decline, lifecycle planning and long-term stocking are recommended for new designs.
EPF8820ARC208-2A - FLEX 8000 FPGA, 672 Logic Elements, 152 I/O | Altera
The Altera EPF8820ARC208-2A is a member of the FLEX 8000 family of CMOS SRAM-based Field-Programmable Gate Arrays (FPGAs), delivering 672 logic elements (LEs), 84 logic array blocks (LABs), and 152 user I/O pins in a 208-pin Square Plastic Quad Flat Pack (S-PQFP) package with an exposed thermal pad and a 0.500 mm terminal pitch. It operates from a 4.75 V to 5.25 V supply and is rated for commercial temperature range (0 °C to 70 °C). The -2A speed grade delivers a typical propagation delay of approximately 5 ns, targeting glue-logic and bus-interface applications of the late 1990s and early 2000s. What is an FPGA? A Field-Programmable Gate Array is a programmable logic device containing an array of configurable logic blocks (CLBs/LABs), programmable routing channels, and programmable I/O cells. Unlike a CPLD (Complex Programmable Logic Device) which uses non-volatile EEPROM/Flash cells, the FLEX 8000 family uses volatile SRAM configuration cells - meaning the device must be reconfigured at every power-up using a serial configuration PROM (EPC1, EPC1064, EPC1213, or EPC1441) or a microcontroller. FPGAs sit in the broader hierarchy: programmable logic device (PLD) -> FPGA -> SRAM-based FPGA -> FLEX 8000 family. Key features include 152 user I/O, 672 logic elements organized into 84 LABs, embedded SRAM for distributed memory, JTAG (IEEE 1149.1) boundary-scan test support, multiVolt I/O allowing 3.3 V or 5.0 V interface levels on VCCIO pins, and tri-state buffer control on every I/O. The architecture combines fine-grained logic with predictable interconnect delays suitable for synchronous state machines, FIFO buffers, and custom peripheral implementations. Technical depth: the FLEX 8000 family uses a continuous-row LAB architecture with FastTrack Interconnect running horizontally and vertically between rows. Each LAB contains 8 logic elements, and each LE contains a 4-input look-up table (LUT), a programmable register, and dedicated carry chain logic. Embedded array blocks (EABs) provide on-chip RAM/ROM up to 2 Kbits per block. Configuration is loaded serially via the DATA0/DCLK/nCONFIG pins or in parallel via the EPC series PROMs. Typical applications include 5 V-tolerant glue logic, PCI bus interface bridges (33 MHz, 32-bit), industrial control state machines, custom peripheral replacement on legacy 8051/MIPS systems, and telecom backplane glue. The 5 V tolerance on VCCIO pins allows direct interface to legacy TTL logic without level shifters. Design consideration: the FLEX 8000 family is in legacy/last-time-buy status - confirm lifecycle before starting a new design. Always include a JTAG header for in-system programming (ISP) via the Altera ByteBlaster or USB-Blaster download cable. This page synthesizes current distributor pricing, drop-in alternatives, and practical design notes not found in the standalone manufacturer datasheet, including lifecycle alerts and configuration PROM recommendations.
EPF8820ARC208-2H - FLEX 8000 FPGA, 672 LEs, 152 I/O | Altera
The Altera EPF8820ARC208-2H is a member of the FLEX 8000 family of CMOS SRAM-based Field Programmable Gate Arrays (FPGAs), delivering 672 logic elements with 152 user I/O pins in a 208-pin fine-pitch plastic quad flatpack (S-PQFP-G208) with 0.500 mm terminal pitch and an exposed thermal pad. A Field Programmable Gate Array (FPGA) is a type of programmable logic device (PLD) that combines the integration density of an application-specific integrated circuit with the flexibility of software-programmed hardware. FPGAs sit within the broader hierarchy of programmable logic: PLD -> CPLD -> FPGA -> SoC FPGA. The FLEX 8000 family uses CMOS SRAM configuration elements that are loaded at system power-up from an industry-standard parallel EPROM, an Altera serial configuration device (such as EPC1, EPC1213, EPC1064, or EPC1441), or a system controller - making the device volatile and re-programmable in-circuit. Key specifications of the EPF8820ARC208-2H include a 5.0 ns propagation delay through combinational paths, support for 3.3V or 5.0V I/O levels (selectable via VCCIO pins), and 152 I/O lines with 4 dedicated inputs and 148 outputs supporting registered output macrocell functions. The device operates across an extended temperature range suitable for industrial environments and is housed in a 208-ball exposed-pad QFP package. Architecture-wise, the FLEX 8000 family implements a logic-element based fabric with continuous interconnect routing and embedded array blocks, providing high register counts suitable for digital signal processing, wide-data-path manipulation, bus interfacing, TTL integration, coprocessor functions, and high-speed control logic. The high-pin-count 208-pin package allows multiple 32-bit buses to be integrated within a single device. Typical applications include industrial control systems, telecommunications infrastructure, prototyping and logic emulation, glue logic replacement, and legacy system maintenance. Engineers most often encounter the EPF8820ARC208-2H when sustaining or replicating older Altera-based designs where modern Cyclone or MAX families would require a complete board re-spin. When designing with this device, ensure correct VCCIO selection (3.3V or 5.0V) to match downstream logic levels, and pair it with a compatible configuration PROM or controller for SRAM-based bitstream loading. The exposed thermal pad must be soldered to a sufficiently large copper pour to meet the package's thermal resistance specification. This page synthesizes distributor pricing, drop-in Altera FLEX 8000 alternatives, and practical design notes not found in the original manufacturer datasheet - providing an information-gain reference for engineers maintaining legacy Altera designs.
EPF8820ARC208-2N - FLEX 8000 8K Gate 672-Cell FPGA | Altera
The Altera EPF8820ARC208-2N is a member of the FLEX 8000 family of CMOS SRAM-based Field-Programmable Gate Arrays (FPGAs), delivering 8,000 usable gates organized as 672 logic elements (LEs) in a 208-pin RQFP (BFQFP with exposed pad) package. It is fabricated on a 0.42 µm process and operates from a 5 V supply with selectable 3.3 V or 5.0 V VCCIO for output bank compatibility, supporting up to 152 user I/O pins (148 outputs plus 4 dedicated inputs) at toggle frequencies up to 125 MHz. An FPGA (Field-Programmable Gate Array) is a programmable logic device that combines a matrix of configurable logic blocks (LEs) with programmable interconnect and I/O cells. Within the broader hierarchy, this places it as: programmable logic -> programmable logic device -> integrated circuit -> semiconductor. FLEX 8000 sits between simple PLDs/CPLDs (gate-count-limited) and modern high-density FPGAs, providing register-rich, in-system reconfigurable logic at a low cost per gate. Key features of the EPF8820ARC208-2N include in-circuit reconfigurability (ICR) via external EPC1, EPC1213, EPC1064, or EPC1441 Altera configuration devices or a system controller, JTAG boundary-scan test support, and tri-state output buffers with programmable slew-rate control. The 208-pin RQFP package provides an exposed thermal pad that reduces junction-to-ambient thermal resistance for higher-power designs. The FLEX 8000 architecture uses look-up table (LUT)-based logic elements, fast carry chains for arithmetic, a cascade chain for wide fan-in functions, and a hierarchical interconnect with FastTrack routing. The SRAM configuration memory allows unlimited reconfiguration but requires external non-volatile storage, which Altera provides through its dedicated EPC series configuration EPROMs. Typical applications include telecommunications glue logic, industrial control interfacing, PCI bus bridges, DSP co-processing front-ends, and legacy system prototyping where a 5 V-tolerant, register-rich PLD replaces multiple discrete 74LS/74F TTL packages. Its in-system reconfigurability also suits remote field-upgradeable designs. When designing with this device, allocate sufficient configuration time during power-up and verify VCCIO levels match downstream logic; mixing 5 V TTL and 3.3 V logic in different I/O banks is supported only with proper bank-by-bank VCCIO selection. The exposed pad of the 208-RQFP must be soldered to a sufficient copper pour for thermal dissipation. This page synthesizes distributor pricing, drop-in FLEX 8000 alternatives, application notes, and PCB layout guidance not found in the original manufacturer datasheet, providing engineering value beyond what Altera's datasheet alone offers.
EPF8820ARC208-3 - FLEX 8000 FPGA, 8K Gates, 672 Cells | Intel / Altera
The Intel (formerly Altera) EPF8820ARC208-3 is a member of the FLEX 8000 family of CMOS field-programmable gate arrays (FPGAs), featuring 8,000 usable gates, 672 logic cells, and 152 registers in a 208-pin RQFP/BFQFP package with exposed pad. Built on a 0.42 µm CMOS process, it operates from a 4.75V to 5.25V single supply and supports system clock frequencies up to 125 MHz, making it a classic high-density programmable logic device for industrial, telecommunications, and embedded glue-logic designs of the late 1990s and early 2000s. A field-programmable gate array (FPGA) is a type of programmable logic device (PLD) - itself a category of integrated circuit - that combines a matrix of configurable logic blocks (CLBs), embedded memory, and programmable routing to implement arbitrary digital logic. FPGAs sit at the top of the programmable logic hierarchy (CPLD -> PLD -> FPGA -> programmable SoC) and offer higher gate counts and richer register/IO resources than simpler CPLDs. The FLEX 8000 family was Altera's first generation of look-up-table (LUT)-based FPGAs with embedded memory, replacing earlier MAX-series PAL/GAL architectures with true register-rich, in-system reconfigurable logic. Key features include in-circuit reconfigurability (ICR) via external configuration devices or intelligent controllers, four dedicated low-skew clock distribution networks, JTAG boundary-scan test support (IEEE 1149.1), and tri-stateable I/O buffers with individually programmable slew-rate control. The device also integrates fast on-chip logic for arithmetic functions and provides selectable 3.3V/5V I/O tolerance through dedicated PCI-compliant output buffers, simplifying mixed-voltage interfacing on legacy backplanes. The EPF8820ARC208-3 architecture consists of 672 logic elements arranged in rows and columns, with each element containing a 4-input look-up table, a programmable flip-flop, and dedicated carry-chain logic for arithmetic operations. Configuration memory is SRAM-based, requiring a serial or parallel EPROM (such as the EPC2 or EPC8 configuration device) to load the bitstream at power-up. This SRAM architecture allows unlimited reconfigurations and supports in-field firmware upgrades, but also means the configuration is volatile and must be reloaded after every power cycle. Typical applications include telecommunications channel aggregation, industrial control and factory automation glue logic, military and aerospace systems, PCI bus interfaces, legacy mainframe and storage interfaces, and digital signal processing front-ends. The wide 5V supply tolerance and 208-pin package also make it well suited for industrial 24V-conditioned rails with local regulation and for backplane designs that route many parallel signals. When designing with this device, ensure proper decoupling on every VCC/VCCIO pin, place the configuration EPROM within the recommended trace-length budget, and honor the exposed-pad soldering requirement to maintain the specified thermal resistance. Designers migrating to modern designs should evaluate Intel Cyclone or Lattice ECP5 families, but pin-compatible FLEX 8000 variants remain available for long-life-cycle programs. This page synthesizes distributor pricing, drop-in alternatives from the FLEX 8000 family, and practical design notes not found in the manufacturer datasheet alone - providing a single authoritative reference for procurement and engineering teams.
EPF8820ARC208-3-NW - 8K-Gate FLEX 8000 FPGA, 208-RQFP | Altera
The Altera (now Intel) EPF8820ARC208-3-NW is a member of the FLEX 8000 family of CMOS programmable logic devices (PLDs), delivering up to 8,000 usable gates, 1,500 registers, and 152 user I/O pins in a 208-pin RQFP (28x28 mm) package with an exposed thermal pad. The device operates from a 4.75 V to 5.25 V single supply and supports system clock frequencies consistent with 5 V FLEX 8000 silicon, making it a drop-in legacy option for industrial and military designs. A Field-Programmable Gate Array (FPGA) is a semiconductor integrated circuit that can be configured by the customer or designer after manufacturing to implement any digital logic function. FPGAs sit in the broader taxonomy of programmable logic devices -> complex programmable logic devices (CPLDs) and FPGAs -> programmable logic -> digital IC -> integrated circuit. FLEX 8000 devices occupy the high-density register-rich segment of Altera's classic SRAM-based FPGA portfolio, sitting between early MAX-class CPLDs and later APEX/Cyclone families in both density and process node. Key features include in-circuit reconfigurability (ICR) via external configuration devices or intelligent controllers, 100% factory-tested logic, multiVolt I/O support in compatible families, and JTAG-based boundary-scan testing. The device offers 4.75V-5.25V core supply tolerance, 152 user I/Os, and a power-optimized architecture that supports sleep mode for low-power standby. The exposed thermal pad on the 208-RQFP package allows PCB ground-plane attachment for improved heat spreading in industrial chassis. The FLEX 8000 architecture uses an SRAM-based look-up table (LUT) fabric with embedded register cells, offering faster place-and-route than CPLDs but requiring configuration at every power-up. Typical applications include industrial glue logic replacement, telecommunications backplane glue, legacy 5 V bus controllers, prototyping platforms for VHDL/Verilog designs, and digital signal conditioning interfaces. The device is well suited to designs that need high register count and I/O density without migrating to newer 3.3 V / 1.5 V FPGA families, particularly where the 5 V tolerance of FLEX 8000 is required. Design considerations include mandatory external configuration memory (EPC) for SRAM configuration cells, JTAG programming chain design, and careful 5 V power-rail decoupling to support hot-swap or backplane insertion. This page synthesizes distributor pricing, FLEX 8000 family alternatives, and configuration-memory design notes that go beyond the bare datasheet.
EPF8820ARC208-3N - FLEX 8000 FPGA, 672 LEs, 125MHz, 208-RQFP | Altera
The Altera EPF8820ARC208-3N is a member of the FLEX 8000 family of CMOS SRAM-based Field-Programmable Gate Arrays (FPGAs), delivering 8,000 usable gates and 672 logic elements in a 208-pin PowerQuad QFP (RQFP) package with exposed pad. The device is fabricated in 0.42 µm CMOS technology, operates from a 5V supply (4.75 V to 5.25 V), and supports user I/O voltages of either 3.3 V or 5 V. Internal configuration memory is implemented with industry-standard SRAM, requiring an external Altera configuration device (EPC1, EPC1213, EPC1064, or EPC1441) or a system controller to load the bitstream at power-up. An FPGA (Field-Programmable Gate Array) is a programmable logic device (PLD) that combines the architectural flexibility of gate arrays with the time-to-market advantage of in-system configuration. Within the broader semiconductor hierarchy, an FPGA sits between simple PLDs (PALs, GALs) and fixed-function ASICs, offering thousands of look-up tables (LUTs), registers, and dedicated routing resources that engineers can re-program repeatedly. The FLEX 8000 family specifically targets low-cost, high-density applications where register-rich logic and predictable timing are critical. Each Logic Array Block (LAB) contains ten Logic Elements (LEs), each LE comprising a 4-input LUT, a programmable flip-flop with clear/preset, dedicated high-speed paths for carry and cascade chains, and bidirectional interconnect. Key specifications of the EPF8820ARC208-3N include a maximum operating frequency of 125 MHz, a propagation delay of approximately 5 ns (-3 speed grade), a FlipFlop count of 152, and 208 user I/O pins distributed across the package. In-system reconfigurability allows the device to be reloaded without powering down, while JTAG support enables boundary-scan test and configuration verification. Dedicated clock, clear, and preset control signals can be driven either by dedicated input pins, general-purpose I/O, or internal logic, giving designers flexible clock-domain management. Typical applications for the EPF8820ARC208-3N include industrial control logic, glue logic and bus interfacing in legacy 5 V systems, prototyping interfaces for ASIC replacement, glue logic between microprocessors and peripherals, and digital signal processing front-ends. The 5 V tolerance and high-drive I/O also make it well-suited for telecommunications backplane designs and test-and-measurement equipment. Although Intel/Altera has officially classified the FLEX 8000 family as legacy, Rochester Electronics and authorized aftermarket distributors continue to support long-term supply for aerospace, defense, and industrial programs. When designing with this part, pay special attention to configuration: a properly sized EPC-series configuration device must match the bitstream size, and JTAG or PS configuration modes must be selected via MSEL pins. Decoupling the VCCINT and VCCIO rails with 0.1 µF and 10 µF ceramic capacitors is essential for clean power delivery to the SRAM configuration cells. This page synthesizes distributor pricing (as of 2026-09-12), drop-in alternatives within the FLEX 8000 family, and practical design considerations not typically found in a standalone datasheet PDF.
EPF8820ARC208-4 - FLEX 8000 FPGA, 8K Gates, 672 Cells, 208-RQFP | Altera
The Altera (now Intel Programmable Solutions Group) EPF8820ARC208-4 is a member of the legacy FLEX 8000 family of CMOS programmable logic devices, integrating approximately 8,000 usable gates and 672 logic elements into 152 user I/O pins and packaged in a 208-pin RQFP (28x28 mm) with exposed thermal pad. It operates from a 4.75 V to 5.25 V supply, supports in-circuit reconfigurability (ICR) via external configuration devices, and is offered in the -4 speed grade. Background: A Field Programmable Gate Array (FPGA) is a type of programmable logic device (PLD) that combines high gate density with reconfigurable interconnect and logic. Within the broader taxonomy, the EPF8820ARC208-4 belongs to the FLEX 8000 family (PLD -> CPLD/FPGA -> SRAM-based FPGA -> FLEX 8000). FPGAs differ from CPLDs in architecture by offering distributed logic-element arrays with SRAM-based configuration memory, enabling higher density and more flexible routing at the cost of requiring external configuration memory on power-up. Key differentiating features include 152 maximum user I/O pins, 672 logic cells (registers), an approximate 16,000-gate device density ceiling, 5 V tolerant I/O, and the -4 speed grade designation. The -4 speed grade implies a particular toggle-rate/performance tier within the FLEX 8000 family, with other grades (-3, -2) offering different fMAX/per-pin performance. The 208-RQFP package with exposed pad aids thermal dissipation for high-utilization designs. Architecturally, the FLEX 8000 family uses a continuous SRAM-based configuration memory (each logic element and routing switch is loaded from a serial/parallel configuration bitstream at power-up). This is the same fundamental approach used by modern SRAM FPGAs and explains why the family supports in-circuit reconfigurability - the device can be reloaded while resident on a board, unlike antifuse or one-time-programmable devices. Typical applications include legacy telecom line cards, industrial glue logic replacement, prototyping platforms for ASIC emulation, and 5 V-tolerant bus-interface bridging. The wide 5 V supply tolerance and 152 I/O make the EPF8820ARC208-4 well suited to mixed 3.3 V / 5 V system integration where modern 1.8 V-only FPGAs cannot directly interface legacy logic. When designing with the EPF8820ARC208-4, designers should account for the external configuration device requirement (the part is SRAM-based and does not retain configuration without an EPC/EPCS serial configuration memory or parallel PROM). Engineers also planning a modern redesign should note that this family is mature/last-time-buy, and that newer Cyclone or MAX families from Intel/Altera are pin-compatible upgrades for many footprints.
EPF8820ARC208-4N - FLEX 8000 FPGA 8K Gates 672 Cells | Altera
The Altera EPF8820ARC208-4N is a member of the FLEX 8000 family of CMOS Field Programmable Gate Arrays (FPGAs), offering 8,000 usable gates, 672 logic elements, and a maximum operating frequency of 125 MHz in a 208-pin Power Quad Flat Pack (RQFP/BFQFP) package with exposed thermal pad. The device is fabricated on a 0.42 µm CMOS process and supports configurable I/O voltages of 3.3 V or 5 V, providing 152 user I/O lines plus 4 dedicated input pins for clock and global control signals. The propagation delay through the logic array is 5.5 ns, suitable for glue-logic, bus-interface, and state-machine applications in industrial and commercial temperature grades. An FPGA (Field Programmable Gate Array) is a programmable logic device that combines the high integration of a gate array with the field-programmability of a PLD. FPGAs occupy the middle of the programmable logic hierarchy between simple Complex PLDs (CPLDs) and large System-on-Cel (SoC) FPGAs; they are typically used for register-rich, high-gate-count glue logic, custom datapaths, and protocol bridges where low-to-moderate complexity is required but a CPLD does not provide enough logic capacity. The FLEX 8000 family specifically targets low-cost, high-volume designs with in-circuit reconfigurability (ICR) and SRAM-based configuration memory. Key features of the EPF8820ARC208-4N include a 5 V core voltage (4.75 V to 5.25 V supply range), 5.5 ns pin-to-pin propagation delay, 125 MHz internal performance, fast continuous interconnect with predictable delay, and JTAG-compliant boundary-scan test support. The exposed thermal pad on the 208-RQFP package enables direct heatsinking for industrial temperature operation (-40 °C to +85 °C) and improves reliability in thermally constrained enclosures. Architecturally, the EPF8820ARC208-4N consists of logic array blocks (LABs) containing 8 logic elements each, organized into rows and columns and interconnected by a continuous FastTrack routing network. Each logic element includes a 4-input look-up table (LUT), a programmable register, and a carry chain for arithmetic operations, enabling efficient implementation of counters, adders, and state machines. Embedded memory blocks and phase-locked loops (PLLs) are not present in this family - designers needing those should migrate to the FLEX 10K or Cyclone families. Typical applications include industrial control glue logic, peripheral bus bridges (PCI, ISA, VME), telecommunications line-card interfaces, custom register and FIFO interfaces, and legacy system upgrades that require a 5 V tolerant programmable device. The wide I/O count (152 pins) makes it a fit for designs that need to replace multiple 74-series TTL packages. Designers should note that the EPF8820ARC208-4N is a mature, obsolete-generation part. Long-term designs should plan for last-time-buy or migration to the Cyclone or MAX families, both of which offer pin-compatible footprints in selected packages. Decoupling the five 5 V supply pins with 0.1 µF X7R capacitors placed within 5 mm of each supply pin is essential for switching-noise immunity; the exposed thermal pad must be soldered to a copper pour of at least 1 square inch for industrial-temperature operation. This page synthesizes distributor pricing, drop-in same-family alternatives, and practical design notes not found in the manufacturer datasheet alone.
EPF8820ARC208-5 - FLEX 8000 FPGA, 672 Logic Elements, 152 I/O | Altera
The Altera EPF8820ARC208-5 is a member of the FLEX 8000 family of CMOS SRAM-based Field Programmable Gate Arrays (FPGAs), housed in a 208-pin BFQFP (exposed-pad) package. The device integrates 672 Logic Elements (LEs) and exposes 152 user I/O pins, with a -5 speed grade denoting the slowest commercial timing in the FLEX 8000 lineup. The -5 grade is the most timing-relaxed bin and is typically selected when cost is the priority and the target logic can tolerate slower setup/hold budgets than -3 or -4 bins. A Field Programmable Gate Array (FPGA) is a class of programmable logic device that combines an array of configurable logic blocks, programmable interconnect, and I/O cells on a single piece of CMOS silicon. FPGAs occupy a hierarchy between discrete programmable logic devices (PALs, GALs, CPLDs) and ASICs - they offer higher logic density than CPLDs while remaining reprogrammable after PCB assembly, unlike mask-programmed ASICs. The FLEX 8000 family specifically uses CMOS SRAM configuration cells, meaning the design is loaded at every power-up from an external source (serial configuration device, microcontroller, or EPROM) and is volatile on power-down. Key features of the EPF8820ARC208-5 include MultiVolt I/O support (configurable 3.3V or 5.0V I/O banks - except for 84-pin variants), a 5.0V core supply, and an exposed thermal pad for improved heat extraction. With 152 I/O pins in a 208-pin BFQFP, the device can integrate multiple 32-bit buses onto a single chip, making it suitable for bus-bridging and protocol-translation glue logic in legacy industrial and telecom systems. Typical applications include bus-bridging between 3.3V and 5.0V logic domains, industrial control glue logic, telecom backplane interfacing, and ASIC prototyping where the design may eventually migrate to a HardCopy ASIC. The wide 208-pin footprint with exposed pad allows the part to dissipate thermal load efficiently when many I/O buffers toggle simultaneously. When designing with this device, ensure the configuration source (EPC2, EPC4, or microcontroller) is sized correctly for the bitstream. The exposed thermal pad must be soldered to a properly sized copper pour for thermal reliability. Engineering samples of the -5 grade should be benchmarked against -3 and -4 grades if timing closure is in question. This page synthesizes distributor pricing, drop-in FLEX 8000 family alternatives sharing the same 208-BFQFP footprint, and practical design notes that are not found in the original manufacturer datasheet.
EPF8820ARC208-5N - FLEX 8000 FPGA, 8K Gates, 208-Pin RQFP | Altera
The Altera (now Intel) EPF8820ARC208-5N is a member of the FLEX 8000 family of CMOS SRAM-based FPGAs, delivering 8,000 usable gates and 672 logic elements in a 208-pin RQFP (plastic Quad Flat Pack) package with exposed pad. The device is fabricated on a 0.42 µm CMOS process, supports 5V core operation, and is specified at the -5 speed grade for the slowest commercial timing bin of the FLEX 8000 series. According to distributor parametric data, the device contains 152 I/O pins and integrates 672 logic cells. What is a FLEX 8000 FPGA? The FLEX 8000 is Altera's first-generation FLEX (Flexible Logic Element matriX) architecture, positioned in the broader taxonomy of programmable logic devices (PLD) alongside CPLDs and other early FPGAs. It uses a continuous, SRAM-based lookup-table (LUT) fabric combined with FastTrack interconnect, and is configured at power-up from an industry-standard parallel EPROM, an Altera serial configuration device (EPC1, EPC1064, EPC1213, EPC1441), or a system controller. The architecture is hierarchically related to later Altera families (FLEX 10K, ACEX, Cyclone) but predates modern low-cost families. Key features of the EPF8820ARC208-5N include 8,000 typical gates, 672 logic elements, 152 user I/O pins, embedded SRAM configuration memory, multi-volt I/O support (3.3V/5V tolerant), in-system programmability via JTAG-compatible interface (ByteBlaster), and the 208-pin RQFP exposed-pad package. The -5 speed grade places it in the slowest timing bin of the FLEX 8000 family, trading off toggle rate and setup/hold margins for cost. The FLEX 8000 architecture separates logic and interconnect into a fine-grained, segmented FastTrack continuous routing fabric, surrounded by I/O elements (IOEs) at all four edges. The EPF8820ARC208-5N is well suited to glue-logic, bus-interface, and state-machine consolidation roles where high pin count, low cost, and 5V tolerance outweigh the need for high clock rates. The exposed pad on the RQFP-208 package provides an additional thermal dissipation path for higher-utilization designs. Typical applications include industrial control glue logic, parallel bus bridges, legacy peripheral interface adapters, and ASIC prototyping. The wide I/O count and 5V tolerance make it well matched to 5V microcontroller buses (e.g. 8051, 68k) and to industrial backplane interfaces. Designers use the Altera MAX+PLUS II or Quartus (legacy device support) toolchain for synthesis, fitting, and simulation. When designing with this part, ensure the configuration scheme (passive serial from EPC1/EPC1441, or microprocessor-driven) is selected early because the FLEX 8000 SRAM cells require reconfiguration on every power-up. The exposed pad of the RQFP-208 must be soldered to a sufficient copper pour for thermal relief in high-toggle designs. For new designs, evaluate Cyclone IV/V or MAX II as modern low-cost alternatives, but note that the pinout and architecture are NOT drop-in compatible. This page consolidates distributor stock and pricing signals, pin-compatible FLEX 8000 family alternatives, and practical configuration-scheme design notes not always found in the original Altera datasheet.
EPF8820ARC208-C - FLEX 8000 FPGA, 8K Gates, 152 I/O | Altera
The Altera EPF8820ARC208-C is a member of the FLEX 8000 family of CMOS SRAM-based Field-Programmable Gate Arrays (FPGAs), delivering up to 8,000 usable gates and 672 logic elements in a 208-pin RQFP (Plastic Quad Flat Pack) package. The -C suffix denotes the commercial temperature grade (0C to +70C) with a typical core voltage of 5.0V and MultiVolt I/O support for 3.3V or 5.0V operation. The device exposes 152 user I/O pins across four I/O banks, enabling wide data buses and complex glue-logic functions in legacy 5V systems. An FPGA (Field-Programmable Gate Array) is a type of programmable logic device (PLD) that uses an array of configurable logic blocks (CLBs), a programmable interconnect network, and programmable I/O cells to implement arbitrary digital logic. In the taxonomy of digital semiconductors, an FPGA sits below an ASIC in performance but above a generic CPLD in density. FPGAs are commonly used for prototyping, low-volume designs, and applications requiring in-field reconfigurability. The FLEX 8000 family uses SRAM configuration cells, so the device must be configured at every power-up from an external EPROM or an Altera serial configuration device such as the EPC1, EPC1213, EPC1064, or EPC1441. Key features of the EPF8820ARC208-C include 8,000 usable gates, 672 logic cells, 152 maximum user I/Os, MultiVolt I/O (3.3V / 5.0V), in-circuit reconfigurability (ICR), and built-in JTAG support via the IEEE 1149.1 boundary-scan interface. The architecture is built on a 0.42um CMOS process with five interconnect layers, and the device operates from a single 4.75V to 5.25V supply. The 208-RQFP package (28x28 mm body, 0.5 mm pitch) is a plastic surface-mount option compatible with conventional SMT assembly lines. The FLEX 8000 architecture employs continuous, high-performance FastTrack interconnect routing across the entire die, giving consistent and predictable timing across all logic paths. Each Logic Array Block (LAB) contains 8 to 16 logic elements (LEs), and each LE combines a 4-input look-up table with a dedicated programmable register, fast carry chain for arithmetic, and a cascade chain for wide fan-in functions. Embedded Logic Array Blocks (ELABs) provide efficient memory implementation, and the IOE structure supports a wide range of I/O standards including TTL, CMOS, and PCI with configurable drive strength and slew-rate control. Typical applications for the EPF8820ARC208-C include 5V PCI bus interface logic, industrial control glue logic, telecommunications line-card controllers, legacy peripheral bridging, and ASIC prototyping where the 152 I/Os and 8K-gate capacity provide a comfortable margin for peripheral controllers, bus arbitration, and protocol adaptation. The MultiVolt feature makes the part especially attractive in mixed-voltage systems where a 5V core must interface to 3.3V peripherals without external level shifters. When designing with the EPF8820ARC208-C, plan the configuration scheme early because FLEX 8000 devices are SRAM-based and lose configuration when power is removed. A serial or parallel configuration PROM (EPC1, EPC1064, or EPC1441) must be present at every power-on. For high-reliability designs, add CRC checking in the user logic because configuration bit-stream errors can corrupt the device behavior. The 208-RQFP exposed pad improves thermal dissipation, but at moderate toggle rates the part usually requires no additional heatsinking. This page synthesizes distributor availability, drop-in compatible FLEX 8000 variants, and practical design considerations not found in the manufacturer datasheet alone, giving engineers an at-a-glance comparison to alternatives such as the EPF8820ARC208-3, EPF8820AQC208-4, and other FLEX 8000 family members in the same 208-RQFP footprint.
EPF8820ARC240-3 - FLEX 8000 FPGA 672 LE | Intel/Altera | 240-pin RQFP
The Intel (formerly Altera) EPF8820ARC240-3 is a member of the FLEX 8000 family of CMOS SRAM-based programmable logic devices (PLDs) housed in a 240-pin RQFP package and speed grade -3. The device integrates 672 logic elements (LEs) and approximately 8,000 usable gates, built on a 0.42 µm triple-layer-metal CMOS process, with on-chip Flash configuration memory and in-system programmability via the IEEE 1149.1 JTAG interface. FLEX 8000 is a PLD family bridging classic EPLDs and early FPGAs: each LE combines a 4-input look-up table, a programmable flip-flop, dedicated carry and cascade chains, and a tri-state buffer for direct I/O. The hierarchical FastTrack Interconnect routes signals across rows and columns of Logic Array Blocks (LABs), giving predictable timing without manual place-and-route. Configurable I/O pins support 5.0V PCI-compliant and 3.3V LVTTL/LVCMOS operation through the FLEX 8000 device family. The -3 speed grade denotes a slower commercial-timing bin suitable for cost-sensitive industrial designs rather than the fastest -2 bin. EABs (Embedded Array Blocks) provide 2,048-bit RAM/ROM per block, useful for small FIFOs, state machines and microcode storage. The device includes a built-in JTAG controller (1149.1) for boundary-scan test and ISP, plus a 4-pin configuration interface and a DCLK/data hand-off path for serial or parallel PROMs. Multiple FLEX 8000 devices can be cascaded for wider data or address buses through the chain-configuration port. The FLEX 8000 family of programmable logic devices (PLDs) is a hierarchy of densities from 2,500 to 16,000 usable gates, integrating logic, interconnect, and configuration memory onto a single CMOS die. Each device is composed of LABs (Logic Array Blocks), EABs (Embedded Array Blocks) for memory/multiplier functions, FastTrack interconnect for predictable row/column routing, and I/O elements (IOEs) for per-pin direction, slew rate, and PCI-compliance configuration. The hierarchy is: logic element -> LAB -> device -> FLEX 8000 family -> programmable logic -> FPGA/PLD -> semiconductor. Typical applications include glue logic replacement, bus interface bridging, peripheral controllers, industrial control and instrumentation front-ends, and legacy telecommunications line cards. The wide supply (4.75V to 5.25V core; PCI-compatible I/O) and 240-pin package make the EPF8820ARC240-3 a common migration target when designers outgrow PAL/GAL or 22V10-type devices but do not yet need a high-density modern FPGA. When designing with this device, ensure a clean 5.0V ±5% supply and a JTAG header that respects the TRST and TCK signal integrity. Decoupling: place one 0.1 µF per VCC pin and one 10 µF bulk per supply plane. Configuration: choose BitBlaster, ByteBlaster or a serial EPC configuration device, then verify the JTAG IDCODE before in-system programming. This page synthesizes distributor stock, parametric alternatives, and practical configuration guidance beyond the manufacturer datasheet to help engineers migrate legacy FLEX 8000 designs to available inventory.
EPF8820ARC240-3N - FLEX 8000 672-LE FPGA | Intel / Altera
The Intel (formerly Altera) EPF8820ARC240-3N is a member of the FLEX 8000 family of SRAM-based CMOS programmable logic devices, offering 672 logic elements (LEs) in a 240-pin RQFP package with a -3 speed grade. The FLEX 8000 family combines the fine-grained architecture and high register count of FPGAs with the high-speed, predictable interconnect delays of EPLDs, making the part suitable for high-volume logic integration, glue-logic replacement, and bus-interface bridging applications. A Field-Programmable Gate Array (FPGA) is a programmable logic device whose internal logic blocks and interconnect matrix are configured by SRAM lookup tables (LUTs), loaded at power-up from an external configuration memory. The FLEX 8000 architecture belongs to the hierarchy: FPGA -> programmable logic -> logic IC -> integrated circuit, with FPGAs typically used for parallel datapath processing, custom state machines, and high I/O-count interfacing. The device is configured at system power-up by data stored in an industry-standard parallel EPROM, an Altera serial configuration device (EPC1, EPC1213, EPC1064, or EPC1441), or by a system controller. Key features of the EPF8820ARC240-3N include 672 logic elements, fast continuous interconnect with predictable delay, SRAM-based in-system reconfigurability, JTAG-compliant boundary-scan support, and a 240-pin RQFP package offering ample I/O for parallel buses and datapath applications. The -3 speed grade corresponds to the standard-performance tier of the FLEX 8000 family, suitable for designs with moderate timing margins where the lowest-cost option is preferred over the -4 and faster speed grades. Typical applications include peripheral bus interfacing, DSP co-processing front-ends, communications backplane glue logic, industrial control and instrumentation front-ends, and ASIC prototyping. The wide I/O count and SRAM reconfiguration also enable field-upgradable logic in deployed systems. The part is also widely used in legacy designs and as a replacement for discrete 74-series logic, reducing board area while improving design flexibility.
EPF8820ARC240-4 - FLEX 8000 FPGA 672 LUTs RQFP-240 | Altera
The Altera (now Intel) EPF8820ARC240-4 is a member of the FLEX 8000 family of CMOS SRAM-based programmable logic devices, housed in a 240-pin RQFP (Reduced Quad Flat Pack) package with -4 speed grade. The FLEX 8000 series combines fine-grained logic elements with a hierarchical routing architecture and embedded array blocks (EABs) for high-density combinatorial and sequential design. A Field-Programmable Gate Array (FPGA) is a semiconductor integrated circuit that can be reconfigured by the customer after manufacture to implement arbitrary digital logic. The FLEX 8000 family sits in Altera's classic hierarchical PLD hierarchy - FPGAs that bridge the gap between traditional PLDs (PAL/GAL) and gate arrays, providing thousands of usable gates in a single programmable chip. Each Logic Element (LE) contains a 4-input look-up table, a programmable flip-flop, and dedicated carry and cascade chains, while Embedded Array Blocks (EABs) provide on-chip RAM/ROM for wide memory functions. Key features of the EPF8820ARC240-4 include 672 Logic Elements, 16 EABs providing up to 4096 bits of dual-port RAM or ROM, programmable I/O standards, in-system programmability via the IEEE 1149.1 (JTAG) interface, and a -4 speed grade targeting mid-tier performance. The device operates from a single 5.0V supply with 3.3V or 5V tolerant I/O options and is supported by the Altera MAX+PLUS II and Quartus design toolchains. Typical logic density is 8000 usable gates, making this part suitable for bus interfaces, peripheral glue logic, and small protocol bridges. The FLEX 8000 architecture uses a four-level hierarchical interconnect with FastTrack continuous routing lines and segmented connections, balancing predictable timing with high logic utilization. Each EAB can be configured as a 256x16, 512x8, 1024x4, or 2048x2 memory block and supports parity generation. The -4 speed grade indicates a typical LE-to-LE propagation delay of around 4 ns, suitable for state-machine and bus-interface designs up to approximately 80 MHz internal logic rates. Typical applications include bus-interface bridges (e.g., ISA-to-PCI glue), peripheral controllers for legacy MCUs, telecommunications channel adaptation logic, industrial control state machines, and prototype ASIC replacement. The 240-pin RQFP package provides ample user I/O for memory-rich designs. Engineers often select this part for low-cost, moderate-complexity logic consolidation where mask-programmed gate arrays would be uneconomical. When designing with the EPF8820ARC240-4, note that the FLEX 8000 family has been classified by Altera/Intel as legacy and is supported only for existing designs - new projects should target Cyclone, MAX II, or MAX 10 families. Decoupling must follow the datasheet's VCCINT/VCCIO guidelines, and unused I/O pins should be left floating or driven per the JTAG configuration scheme. This page synthesizes pricing, drop-in package-compatible alternatives, and practical design notes not consolidated in the manufacturer datasheet - useful for engineers maintaining or replacing legacy FLEX 8000 designs.
EPF8820ARC240-4N - FLEX 8000 FPGA, 880 LE, 240-Pin RQFP | Altera
The Altera (now Intel FPGA) EPF8820ARC240-4N is a member of the FLEX 8000 family of SRAM-based programmable logic devices, integrating 880 Logic Elements (LEs) in a 240-pin RQFP (Quad Flat Pack) package. It is rated speed grade -4 and is built on a 0.42 µm CMOS SRAM process, delivering up to 100 MHz internal operation with deterministic interconnect delays. The device combines FPGA fine-grained register-rich architecture with EPLD-style fast predictable timing, targeting bus interfaces, TTL integration, coprocessor functions, and high-speed control logic. A Field-Programmable Gate Array (FPGA) is a semiconductor integrated circuit containing an array of configurable logic blocks (CLBs/LEs), programmable interconnects, and programmable I/O cells, all controlled by SRAM-based configuration memory. The FLEX 8000 sits in the broader taxonomy: programmable logic device (PLD) -> EPLD/FPGA hybrid -> complex programmable logic device (CPLD) / FPGA -> SRAM-based FPGA -> SRAM-based PLD family. Modern successors include the Altera/Intel Cyclone series, Lattice ECP5, and Xilinx Spartan families; however, FLEX 8000 remains deployed in legacy industrial, telecommunications, and military systems where its deterministic interconnect delay and long-term availability through military/extended programs are valued. Key features include 880 LEs, a maximum of 24 LABs (Logic Array Blocks), 24 user I/O pins per LAB row, in-system programmability via the Altera ByteBlaster or BitBlaster, 5V-tolerant I/O on selected variants, and JTAG boundary-scan support. The architecture uses a FastTrack interconnect that provides predictable, repeatable routing delays regardless of logic placement, simplifying static timing closure. Configuration memory is volatile SRAM, requiring an external configuration EPROM or controller at power-up. Technical depth: the FLEX 8000 LE consists of a 4-input look-up table (LUT) feeding a programmable register with carry-chain and cascade-chain support. Each LAB contains 8 LEs plus local interconnect, control signals, and I/O. The 240-pin RQFP package offers 192 usable I/O pins, making the EPF8820ARC240-4N well suited to wide-bus interface designs (32-bit and 64-bit parallel buses, including PCI bus interfaces). Operating voltage is 5.0 V core with 5.0 V or 3.3 V I/O depending on variant. Typical applications include PCI bus interfaces, TTL-level ASIC/coprocessor integration, high-speed state machines, glue logic replacement, digital signal processing preprocessing, and data path manipulation. The high pin count makes it ideal for integrating multiple 32-bit buses into a single device. Design consideration: FLEX 8000 FPGAs require external configuration memory at every power-up; the EPC2 or EPC8 configuration EPROM, or a microcontroller, must be specified alongside the FPGA. Confirm supply through Altera/Intel FPGA long-term/legacy support channels before committing to new designs. This page synthesizes distributor pricing, same-brand pin-compatible alternatives from the Site MPN list, application circuits, and design notes not consolidated in the original Altera datasheet.