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EPF8820ARC208-4N - FLEX 8000 FPGA 8K Gates 672 Cells | Altera
EPF8820ARC208-4N

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.

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EPF8820ARC208-5 - FLEX 8000 FPGA, 672 Logic Elements, 152 I/O | Altera
EPF8820ARC208-5

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.

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EPF8820ARC208-5N - FLEX 8000 FPGA, 8K Gates, 208-Pin RQFP | Altera
EPF8820ARC208-5N

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.

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EPF8820ARC208-C - FLEX 8000 FPGA, 8K Gates, 152 I/O | Altera
EPF8820ARC208-C

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.

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EPF8820ARC240-3 - FLEX 8000 FPGA 672 LE | Intel/Altera | 240-pin RQFP
EPF8820ARC240-3

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.

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EPF8820ARC240-3N - FLEX 8000 672-LE FPGA | Intel / Altera
EPF8820ARC240-3N

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.

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EPF8820ARC240-4 - FLEX 8000 FPGA 672 LUTs RQFP-240 | Altera
EPF8820ARC240-4

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.

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EPF8820ARC240-4N - FLEX 8000 FPGA, 880 LE, 240-Pin RQFP | Altera
EPF8820ARC240-4N

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.

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EPF8820ARI208-1 - FLEX 8000 FPGA, 672 LEs, 5V, 208-RQFP | Altera
EPF8820ARI208-1

EPF8820ARI208-1 - FLEX 8000 FPGA, 672 LEs, 5V, 208-RQFP | Altera

The Altera (now Intel) EPF8820ARI208-1 is a member of the FLEX 8000 family of SRAM-based Field-Programmable Gate Arrays (FPGAs) fabricated on a 0.42 µm CMOS process. The device integrates 8,000 usable gates and 672 logic elements, with 820 flip-flops, and is housed in a 208-pin RQFP (Ruggedized Quad Flat Pack) package. It operates from a nominal 5V supply with an input range of 4.5V to 5.5V. A Field-Programmable Gate Array (FPGA) is a type of programmable logic device (PLD) that combines the architectural density of gate arrays with the design flexibility of in-system programmability. FPGAs sit within the broader semiconductor hierarchy: PLD -> CPLD -> FPGA -> programmable logic IC. The FLEX 8000 family was Altera's first-generation SRAM-based FPGAs with a fine-grained architecture optimized for high-speed combinatorial and registered logic, and was widely adopted in glue-logic, bus-interface, and telecom line-card applications of the 1990s and early 2000s. Key features of the EPF8820ARI208-1 include 152 maximum user I/O pins, configurable I/O standards at 3.3V or 5V, 4 Kbits of embedded memory, a maximum toggle frequency of 125 MHz, and a typical propagation delay suitable for 70-MHz system designs. The device is in-system programmable via a JTAG/IEEE 1149.1-compliant interface, allowing rapid design iteration and field upgrades. Unlike modern flash-based or antifuse FPGAs, FLEX 8000 devices must load their configuration from an external serial or parallel EPROM at every power-up. From an architectural perspective, the FLEX 8000 LE (logic element) consists of a 4-input look-up table (LUT), a programmable register, and dedicated carry and cascade chains that accelerate arithmetic and wide fan-in logic. The embedded interconnect is a continuous, row-and-column-based FastTrack structure that provides predictable, deterministic timing across the die. The EPF8820ARI208-1 carries an industrial operating temperature grade (-40 °C to +85 °C) suitable for non-automotive embedded designs. Typical applications include glue logic between microprocessors and peripherals, custom bus interfaces (PCI, ISA, VME), telecommunications line cards, industrial control state machines, and prototype ASIC emulation. The 5V I/O tolerance makes it particularly useful for bridging legacy 5V buses to 3.3V ASICs and microcontrollers of that era. When designing with the EPF8820ARI208-1, ensure the configuration EPROM is sized for the device's configuration bitstream and that JTAG chain integrity is verified before board bring-up. Because FLEX 8000 is now in NRND/last-time-buy status, design teams are advised to plan form-fit-function migrations to Altera Cyclone or MAX series for new production.

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EPF8820ARI208-2 - FLEX 8000 FPGA, 672 Logic Elements | Altera
EPF8820ARI208-2

EPF8820ARI208-2 - FLEX 8000 FPGA, 672 Logic Elements | Altera

The Altera EPF8820ARI208-2 is a member of the FLEX 8000 family of SRAM-based Field Programmable Gate Arrays (FPGAs) housed in a 208-pin RQFP/RFP package. It provides 672 logic elements (LEs) and a maximum of 152 user I/O pins, with logic capacity suitable for glue logic, state-machine control, and small to mid-complexity datapath designs in industrial, telecommunications, and embedded systems. The device integrates 6 embedded array blocks (EABs) totaling approximately 16 Kbits of SRAM, configurable as RAM, ROM, or FIFO. Architecture highlights include FastTrack interconnect, look-up table (LUT) based logic, and a fine-grained, register-rich fabric. An FPGA (Field Programmable Gate Array) is a reprogrammable semiconductor device whose logic function is defined by configuration bitstream rather than fixed metal mask. FPGAs sit at the top of the programmable logic hierarchy: programmable logic device (PLD) -> complex PLD (CPLD) -> FPGA. SRAM-based FPGAs such as the FLEX 8000 family are volatile and must be reconfigured at every power-up from an external memory (EPROM) or Altera serial configuration device (EPC1, EPC1213, EPC1064, EPC1441). Key features of the EPF8820ARI208-2 include 672 logic elements, 152 maximum user I/O pins, 6 embedded array blocks (EABs) of 2 Kbits each, in-system reprogrammability via JTAG, and a typical gate count of 8,000 usable gates. The -2 speed grade indicates a moderate-speed bin of the silicon, suitable for cost-sensitive commercial designs. The device supports multiple I/O standards including TTL and CMOS, allowing flexible interfacing to legacy and modern logic families. The FLEX 8000 architecture uses a four-input LUT per logic element with a dedicated register, providing predictable timing and a register-to-logic ratio well-suited for pipelined datapaths. The FastTrack continuous routing fabric and row/column interconnect provide predictable delays independent of placement, simplifying static timing closure in mid-complexity designs. Typical applications include industrial control logic, telecommunications interface glue, prototyping platforms for ASIC emulation, and educational hardware design. The wide I/O count (152 user pins) allows direct connection to parallel buses, memory interfaces, and multiple peripheral buses without external bus expander logic. The SRAM configuration also enables rapid design iteration via JTAG or EPC device reprogramming. When designing with the EPF8820ARI208-2, ensure an external configuration memory is selected because the SRAM configuration is volatile. The 208-pin package provides ample I/O but requires a 4-layer PCB with controlled-impedance traces for stable operation above 50 MHz. JTAG programming via the Altera ByteBlaster or compatible download cable is the standard development flow. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, providing a one-stop engineering reference for sourcing and integrating this legacy FLEX 8000 FPGA.

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EPF8820ARI208-2N - FLEX 8000 FPGA, 208-Pin RQFP | Altera
EPF8820ARI208-2N

EPF8820ARI208-2N - FLEX 8000 FPGA, 208-Pin RQFP | Altera

The Altera EPF8820ARI208-2N is a member of the FLEX 8000 family of SRAM-based programmable logic devices, delivering approximately 8,820 usable gates with 504 logic elements and a maximum of 78 user I/O pins in a 208-pin RQFP (Plastic Quad Flat Pack) surface-mount package. The "-2N" speed grade designation places it in Altera's mid-tier performance bin, while the trailing "N" indicates lead-free / lead-bearing compliant assembly per Altera's packaging nomenclature from the mid-1990s. The FLEX 8000 series was Altera's first architecture to combine FastTrack Interconnect with embedded logic array blocks (LABs), and this variant was widely adopted in telecommunications, industrial control, and glue-logic designs of the late 1990s and early 2000s. A Field-Programmable Gate Array (FPGA) is a type of integrated circuit that can be configured by the customer after manufacturing to implement arbitrary digital logic. FPGAs sit in the programmable logic hierarchy beneath ASICs (Application-Specific Integrated Circuits) but above simple PLDs (Programmable Logic Devices), offering a balance of density, performance, and time-to-market flexibility. The FLEX 8000 family specifically targets glue-logic, bus interfacing, and state-machine applications where discrete TTL or CPLD integration would be too large or too slow. EPF8820ARI208-2N operates on 5.0 V core supply and is supported by the MAX+PLUS II and Quartus design toolchains. Key features of this device include FastTrack continuous routing architecture, four dedicated input pins, a global Clear signal, programmable output slew-rate control, and JTAG-compliant boundary-scan support per IEEE Std 1149.1. Each LAB contains eight logic elements (LEs), each LE consisting of a 4-input LUT, a programmable register, and carry/chain logic for arithmetic operations. The 208-pin RQFP package provides ample signal margin for legacy bus architectures including PCI, ISA, and VME. Typical applications include telecommunications backplane glue logic, industrial motor-control state machines, legacy PCI interface bridges, and military/aerospace digital subsystems. The -2 speed grade is the most commonly specified FLEX 8000 variant, offering a balance of timing margin and cost for non-critical-path designs. When designing with this device, engineers should note that the FLEX 8000 family is NRND (Not Recommended for New Designs) - modern Cyclone or MAX series devices are recommended for new projects. Existing designs should verify pinout compatibility before migration and consult Altera's migration guides for footprint and timing deltas. Designers should also provision 5.0 V tolerance on I/O banks interfacing with legacy 5 V logic families.

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EPF8820ARI208-3 - 672 LE FLEX 8000 FPGA, 208-PQFP | Altera
EPF8820ARI208-3

EPF8820ARI208-3 - 672 LE FLEX 8000 FPGA, 208-PQFP | Altera

The Altera (Intel) EPF8820ARI208-3 is a member of the FLEX 8000 family of CMOS Field-Programmable Gate Arrays (FPGAs), delivering 672 logic elements (LEs) in a 208-pin Plastic Quad Flat Pack (PQFP/RQFP) package with industrial-grade temperature rating. The device integrates 152 user I/O lines plus 4 dedicated inputs, supports configurable I/O standards at 3.3 V or 5 V, and reaches a maximum internal clock frequency of 385 MHz. An FPGA (Field-Programmable Gate Array) is a type of programmable logic device that allows designers to configure arbitrary digital logic after manufacturing using a combination of look-up tables (LUTs), programmable interconnect, and I/O cells. FPGAs sit within the semiconductor hierarchy as: programmable logic -> logic IC -> integrated circuit -> semiconductor. The FLEX 8000 family was Altera's first-generation fine-grained SRAM-based FPGA architecture, predating modern Cyclone and Stratix families, and remains in service in long-lifecycle industrial, telecom, and legacy aerospace designs. Key architectural features include 672 logic elements, 152 user I/O, configurable I/O voltage (3.3 V or 5 V), 385 MHz maximum clock frequency, and SRAM-based configuration cells requiring external configuration memory. The -3 speed grade indicates a specific FLEX 8000 timing bin, and the 'I' suffix denotes the industrial temperature range. Unlike modern flash- or antifuse-based FPGAs, FLEX 8000 devices must be reconfigured on every power-up via a serial configuration EPROM or microcontroller. Typical applications include industrial control logic, telecom interface glue logic, legacy PCI bridge designs, peripheral bus controllers, and long-lifecycle embedded systems where re-spinning the FPGA is impractical. The 5 V tolerance on I/O is particularly valuable for interfacing to legacy TTL buses. When designing with this device, note that FLEX 8000 devices are now NRND/EOL - plan for migration to Cyclone II/III/V or similar modern Altera/Intel FPGAs for new designs. Programming requires Altera MAX+PLUS II or Quartus (legacy support mode) plus a configuration device such as EPC1 or EPC2. This page synthesizes distributor stock, drop-in same-package alternatives from the FLEX 8000 family, and practical migration guidance not found in the original datasheet.

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EPF8820ARI208-3N - 672 LEs FLEX 8000 FPGA, 208-PQFP | Intel / Altera
EPF8820ARI208-3N

EPF8820ARI208-3N - 672 LEs FLEX 8000 FPGA, 208-PQFP | Intel / Altera

The Intel / Altera EPF8820ARI208-3N is a member of the legacy FLEX 8000 programmable logic device family, featuring 672 logic elements (LEs), 16 logic array blocks (LABs), and 672 dedicated flip-flops, packaged in a 208-pin Plastic Quad Flat Pack (PQFP/RQFP) with industrial temperature grading. The FLEX 8000 family was the first Altera SRAM-based FPGA architecture to combine the fine-grained logic and high register count of FPGAs with the high-speed, predictable interconnect delays of EPLDs, providing up to 50,000 usable gates. The "ARI208" suffix denotes a 208-pin RQFP package, "A" indicates the FLEX 8000A speed-grade enhancement, "R" denotes tape-and-reel packaging, and "I" specifies the industrial operating temperature range. The "-3N" suffix marks a specific speed grade and lead-free finish. A Field Programmable Gate Array (FPGA) is a semiconductor integrated circuit built around an array of configurable logic blocks (CLBs), programmable interconnect, and configurable I/O cells, all controlled by SRAM-based configuration memory. FPGAs occupy the highest tier in the programmable logic hierarchy - sitting between discrete logic ICs and ASICs - and are widely used for high-density glue logic, prototyping, DSP, and parallel processing where time-to-market and in-system reprogrammability are paramount. The FLEX 8000 family, launched in the mid-1990s, established many of the architectural conventions still used in modern Altera/Intel FPGA families. Key architectural features include configurable I/O standards supporting both 3.3V and 5V operation, embedded logic array blocks with cascade-chain interconnect for high-speed wide-input functions, and JTAG-based in-system programming via the ByteBlaster or BitBlaster download cables. Each logic element contains a 4-input look-up table (LUT) plus a programmable flip-flop, and each LAB aggregates 8 LEs plus local interconnect. The device also integrates a global ClearN signal, four dedicated clock inputs, and a configurable output enable per I/O pin. Typical applications for the EPF8820ARI208-3N include industrial control glue logic, legacy telecom interface cards, bus-bridging and protocol-conversion logic, test and measurement front-ends, and migration of older Altera designs that require a true drop-in replacement on existing PQFP-208 PCB footprints. The wide 3.3V/5V I/O tolerance and -40C to +85C industrial temperature range also support factory-automation and instrumentation designs. Many engineers keep FLEX 8000 stocks for maintaining long-life industrial equipment where a board re-spin is cost-prohibitive. A critical design consideration is the device's 5V/3.3V dual-voltage I/O - engineers must consult the datasheet's VCCINT and VCCIO pin assignments before laying out mixed-voltage rails, because mis-wiring can permanently damage the input buffers. Because the FLEX 8000 family is EOL with no new designs recommended for production, new designs should target Cyclone IV/V or MAX series unless a true drop-in is required for repair/maintenance. The configuration memory is volatile, so an external PROM or microcontroller is required to load the bitstream at power-up. This page synthesizes distributor availability, drop-in alternatives, and practical design notes not typically found in the manufacturer datasheet.

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EPF8820ARI208-4 - FLEX 8000 FPGA, 8K Gates, 5V, 208-RQFP | Intel / Altera
EPF8820ARI208-4

EPF8820ARI208-4 - FLEX 8000 FPGA, 8K Gates, 5V, 208-RQFP | Intel / Altera

The Intel / Altera EPF8820ARI208-4 is a member of the FLEX 8000 family of SRAM-based, in-system programmable CMOS FPGAs, integrating approximately 8,000 usable gates, 672 logic cells, and 820 flip-flops into a 208-pin ceramic RQFP package rated for industrial temperature operation. It is fabricated on a 0.42 µm CMOS process and operates at a nominal 5 V supply (4.5 V to 5.5 V) with configurable I/O that supports either 3.3 V or 5 V interface levels, allowing direct bridging between legacy 5 V buses and modern 3.3 V peripherals. The device delivers up to 125 MHz internal performance and uses Altera's patented FastTrack Interconnect architecture with continuous, predictable routing delays that simplify static timing closure. An FPGA (Field Programmable Gate Array) is a programmable logic device that combines configurable logic blocks, programmable interconnect, and I/O cells on a single die, allowing engineers to implement custom digital logic without the cost or lead-time of an ASIC. The FLEX 8000 family sits within the hierarchy of programmable logic devices (PLD) and specifically within the SRAM-based FPGA segment - it is volatile and must be configured from an external EPROM, Flash, or microcontroller on every power-up. This makes FLEX 8000 parts well suited to prototyping, low-volume designs, and systems requiring in-system updates via JTAG. Key features of the EPF8820ARI208-4 include a high-density interconnect structure with four row- and column-based interconnect channels, multi-level routing resources (direct, local, row, and column), and built-in JTAG boundary-scan (IEEE Std 1149.1) for board-level testability. The architecture provides bidirectional I/O pins with tri-state control, programmable slew-rate and pull-up options, and dedicated clock and global control signal networks supporting low-skew distribution across the die. Typical applications for the EPF8820ARI208-4 include industrial glue logic, bus-interface bridges between 5 V and 3.3 V domains, replacement of multiple 74-series discrete logic ICs, state-machine controllers for instrumentation, and legacy system modernization where deterministic routing delays ease timing closure in industrial-grade hardware. Designers also leverage this part in telecom line-card controllers and aerospace test fixtures where ceramic RQFP and industrial temperature ratings are mandatory. When designing with the EPF8820ARI208-4, ensure that a configuration source (EPC configuration EPROM, Flash, or controller) is always present because the SRAM cells lose configuration at every power-down. JTAG signals TCK, TMS, TDI, and TDO must be pulled correctly per IEEE 1149.1, and unused I/O pins should be set to tri-state to minimize supply noise. Ceramic RQFP packages should be socketed or hand-soldered with care, as the lead finish and larger thermal mass differ from plastic QFP. This page synthesizes distributor pricing, FLEX 8000 family drop-in alternatives, pinout, and lifecycle notes for the EPF8820ARI208-4 in a single reference - information that the Altera datasheet and distributor listings alone do not aggregate.

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EPF8820ARI208-4H - 8K Gates FLEX 8000 PLD, 208-Pin PQFP | Altera
EPF8820ARI208-4H

EPF8820ARI208-4H - 8K Gates FLEX 8000 PLD, 208-Pin PQFP | Altera

The Altera EPF8820ARI208-4H is a loadable Programmable Logic Device (PLD) from the FLEX 8000 family, delivering 8,000 usable gates, 672 logic cells, and 820 flip-flops in a 208-pin Plastic Quad Flatpack (PQFP) package with 0.5 mm terminal pitch. Built on a 0.42 micrometer CMOS process, the device operates from a 4.5 V to 5.5 V supply with a typical nominal voltage of 5 V, supports configurable I/O operation at either 3.3 V or 5 V, and is characterized for the industrial temperature grade. The architecture combines 4 dedicated inputs with 148 I/O lines (totaling 152 inputs) and propagation delay of 5.5 ns at the -4 speed grade, enabling 125 MHz operation in glue-logic, bus-interface, and state-machine roles. What is a FLEX 8000 Programmable Logic Device? FLEX 8000 is Altera's first-generation SRAM-based PLD family, positioned hierarchically as a PLD -> programmable logic -> logic IC -> integrated circuit. It preceded modern FPGAs by combining look-up-table based logic elements with continuous interconnect, giving engineers ASIC-like density without mask costs. FLEX 8000 parts run on 5 V with 3.3 V-capable I/O, bridging legacy TTL systems and newer 3.3 V peripherals; later FPGAs (Cyclone, MAX) replaced FLEX 8000 but kept the same pin-compatible footprints for many packages, simplifying upgrades. Key features include 8K equivalent gates, 672 logic elements, 820 flip-flops, 152 inputs (4 dedicated + 148 I/O), propagation delay of 5.5 ns, 125 MHz internal performance, in-system programmability via SRAM configuration, and JTAG support. The RQFP-208 package offers gull-wing leads suitable for surface-mount assembly on standard 0.5 mm-pitch land patterns. Technically, FLEX 8000 uses a row-and-column interconnect fabric with embedded array blocks (EABs) for memory functions; the EPF8820 includes eight EABs of 2 Kbits each. The 4 dedicated inputs feed a fast global clock network shared across all logic elements, while 148 bidirectional I/O pins are organized in I/O banks supporting either 3.3 V or 5 V reference standards. The -4H speed grade in this MPN indicates an enhanced -4 speed bin, and the 'H' suffix denotes a specific thermal or test-screen characteristic; refer to the manufacturer datasheet for the exact 'H' definition. Typical applications include legacy telecommunications backplanes, industrial bus bridges (PCI, VME, ISA), protocol converters, and glue-logic consolidation on 5 V motherboards. Its 5 V tolerance and 3.3 V I/O capability also make it suitable for mixed-voltage systems. When designing with the EPF8820ARI208-4H, ensure the 5 V supply is well-decoupled near the VCC pins, keep configuration data stable at power-up, and verify JTAG chain integrity for in-field updates. The PQFP-208 footprint allows direct reuse of legacy FLEX 8000 layout patterns. This page synthesizes current distributor pricing, drop-in same-family alternatives, and practical design notes that complement the official Altera datasheet.

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EPF8820ARI208-4N - FLEX 8000 FPGA 8K Gates 672 Cells 5V RQFP-208 | Altera
EPF8820ARI208-4N

EPF8820ARI208-4N - FLEX 8000 FPGA 8K Gates 672 Cells 5V RQFP-208 | Altera

The Altera (Intel PSG) EPF8820ARI208-4N is a member of the legacy FLEX 8000 family of SRAM-based Field-Programmable Gate Arrays (FPGAs), integrating 8K usable gates, 672 logic cells, and 820 flip-flops into a 208-pin RQFP (Power Quad Flat Pack) package. It is fabricated on a 0.42 µm CMOS process and operates from a nominal 5 V supply (4.5 V to 5.5 V), with configurable I/O standards at 3.3 V or 5 V. The device is rated for industrial temperature operation and supports system clock frequencies up to 125 MHz. An FPGA (Field-Programmable Gate Array) is a semiconductor device built around an array of configurable logic blocks (CLBs), programmable interconnect, and programmable I/O cells. It sits in the broader hierarchy of programmable logic devices (PLD) -> CPLD/FPGA -> programmable logic -> digital IC -> semiconductor. FPGAs allow designers to implement custom digital logic, glue functions, state machines, and modest datapath blocks after PCB fabrication, eliminating mask and NRE costs. The FLEX 8000 family specifically targets high-volume, cost-sensitive glue-logic and bus-interface applications where small-to-medium gate counts and 5 V tolerance are required. Key features of the EPF8820ARI208-4N include 8K typical gates (672 logic elements), 820 flip-flops, embedded array blocks (EABs) for memory, configurable I/O supporting 3.3 V and 5 V levels, in-system programmability through a JTAG/IEEE 1149.1 interface, and a maximum operating frequency of 125 MHz. The RQFP-208 package provides 152 user I/O pins and a Gull-wing lead form suitable for surface-mount assembly. Technically, the device uses a continuous FastTrack interconnect routing architecture with segmented horizontal and vertical paths, providing predictable timing delays regardless of place-and-route. Each logic element combines a 4-input look-up table (LUT), a programmable register, and a carry/chain structure. Embedded Array Blocks (EABs) can be configured as 256×8, 512×4, 1024×2, or 2048×1 memory blocks, enabling on-chip RAM/ROM for FIFO and lookup-table functions. Typical applications include industrial glue-logic replacement, bus-interface bridging (ISA, PCI, VME), legacy telecommunications backplane controllers, military/aerospace retrofits, and educational development platforms. The 5 V tolerant I/Os make it a natural fit for legacy 5 V systems that cannot tolerate modern 1.8 V/2.5 V/3.3 V FPGAs. When designing with this part, note that it is a legacy device on Altera/Intel PSG's product lifecycle. New designs should evaluate Cyclone IV or Cyclone 10 LP for 3.3 V I/O compatibility, but those are not pin-compatible drop-in upgrades. Existing designs using this part should plan for EOL/EOS risk and verify long-term supply with distributors. This page synthesizes distributor pricing, drop-in same-package alternatives drawn from the Altera FLEX 8000 family, and practical design notes not found in the manufacturer datasheet.

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EPF8820ARQ208-3N - FLEX 8000 FPGA 8K Gates 672 Cells 5V RQFP-208
EPF8820ARQ208-3N

EPF8820ARQ208-3N - FLEX 8000 FPGA 8K Gates 672 Cells 5V RQFP-208

The Intel (formerly Altera) EPF8820ARQ208-3N is a FLEX 8000 family Field-Programmable Gate Array (FPGA) delivering 8,000 typical gates, 672 logic cells, and 152 user I/O pins in a 208-pin Power Quad Flat Pack (RQFP) package. Built on a 0.42 µm CMOS SRAM process and rated for 5V operation, this device supports system clock rates up to 125 MHz 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 -3N speed grade indicates the commercial temperature range and a specific timing bin, with the 'N' suffix denoting lead-free / NiPdAu lead finish. A Field-Programmable Gate Array (FPGA) is a type of programmable logic device (PLD) that contains an array of configurable logic blocks (CLBs), programmable interconnects, and configurable I/O cells, all of which are defined by SRAM configuration bits loaded at power-up. FPGAs sit at the top of the digital logic hierarchy: programmable logic device (PLD) -> FPGA -> high-density SRAM-based FPGA. The FLEX 8000 series was Altera's first-generation family to combine fine-grained logic elements with continuous interconnect, enabling integration of 32-bit buses and high-pin-count glue-logic functions that previously required multiple TTL/CMOS devices. Key features include 8,000 typical gates (approximately 16,000 maximum gates), 672 logic elements (LEs), 152 user I/O pins, and embedded SRAM configuration memory. The device operates from a single 5 V supply with 3.3 V or 5 V I/O compatibility and provides in-system programmability (ISP) via the serial configuration interface. Continuous FastTrack interconnect delivers predictable timing across the die, and the four FastRow interconnect structures support high-speed row-to-row signal paths. The architecture is supported by the MAX+PLUS II and Quartus design environments for schematic, VHDL, and Verilog entry. Typical applications include 32-bit bus integration, peripheral bridging, custom microcontroller peripherals, glue-logic replacement for TTL/CMOS designs, industrial control interfaces, telecommunications line cards, and legacy 5V system upgrades. The high I/O count (152 signals) makes it well-suited to designs that need to consolidate multiple standard logic devices into a single package while maintaining 5V-tolerant I/O for direct connection to legacy buses. When designing with this part, pay attention to the I/O supply voltage (5 V VCCIO is required for 5V TTL inputs), and ensure the configuration scheme (EPC1/EPC2 serial or parallel EPROM) matches the board's boot infrastructure. The 208-pin RQFP has an exposed thermal pad that should be soldered to a copper pour to meet the commercial 0 to 70 °C operating range. The FLEX 8000 family is now mature and approaching end-of-life; users designing new boards should plan around the ACTEL/ProASIC3, Lattice ispMACH, or modern Cyclone families. However, the EPF8820ARQ208-3N remains widely available on the secondary market for sustaining legacy designs. This page synthesises distributor stock, same-package drop-in alternatives within the FLEX 8000 family, and practical design notes not found in the original datasheet, giving engineers a single reference for procurement, replacement, and obsolescence planning.

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EPF8820ATC100-2 - FLEX 8000 FPGA 672 LC, TQFP-100 | Altera
EPF8820ATC100-2

EPF8820ATC100-2 - FLEX 8000 FPGA 672 LC, TQFP-100 | Altera

The Altera EPF8820ATC100-2 is a member of the FLEX 8000 family of SRAM-based Field-Programmable Gate Arrays, delivering 672 logic elements (LEs) in a 100-pin Thin Quad Flat Pack (TQFP-100) package. It supports a maximum of 124 user I/O pins and offers on-chip RAM of approximately 6,144 RAM bits, providing a flexible fabric for glue logic, bus interfacing, and custom state-machine integration in legacy and industrial designs. An FPGA (Field-Programmable Gate Array) is a semiconductor integrated circuit composed of an array of configurable logic blocks, programmable interconnect, and I/O cells that can be reconfigured by the customer after manufacturing. FPGAs sit hierarchically under programmable logic devices (PLDs), parallel to CPLDs (Complex PLDs), and are widely used to implement glue logic, custom peripherals, and parallel DSP operations. The FLEX 8000 family is Altera's classic SRAM-based FPGA line, requiring an external configuration memory device (typically an EPC or serial flash) on every power-up because the SRAM cells are volatile. Key features of the EPF8820ATC100-2 include 672 logic elements, 124 maximum user I/O pins, 6 Kbits of embedded RAM, and a -2 speed grade representing the medium-speed bin of the family. The TQFP-100 surface-mount package with 0.5 mm pitch enables standard reflow assembly and is one of the most widely footprint-supported packages in legacy designs. The device operates from a 5 V tolerant I/O supply and a 3.3 V core supply on earlier FLEX 8000 revisions. Architecturally, the EPF8820ATC100-2 uses Altera's classic Logic Element (LE) structure, each consisting of a 4-input look-up table (LUT), a programmable register, and a carry chain for arithmetic. FastRow and FastColumn interconnect lines route signals between LEs and I/O elements with deterministic delays defined by the Quartus/MAX+PLUS II toolchain. The device is configured via the passive serial (PS), passive parallel synchronous (PPS), or active serial (AS) modes, and is in-system programmable through the JTAG-compatible interface. Typical applications include industrial control glue logic, telecommunications backplane interfacing, legacy peripheral emulation, prototyping bridges, and educational FPGA platforms. Engineers often select this part for drop-in replacement of original FLEX 8000 designs where a long-lifecycle pin-compatible Altera/Intel part is required. When designing with this part, provide a stable configuration source (EPC1, EPC2, or compatible flash) and decouple the 5 V and 3.3 V rails with 0.1 uF and 10 uF capacitors near the package. Note that the FLEX 8000 family has been superseded by newer Cyclone and MAX families; new designs should consider Cyclone IV or MAX V for long-term supply assurance. This page synthesizes distributor pricing, package-level drop-in alternatives, and practical design notes that complement the legacy Altera datasheet, helping procurement and design engineers confirm supply options quickly.

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EPF8820ATC100-2N - FLEX 8000 FPGA, 672 LEs, TQFP-100 | Altera
EPF8820ATC100-2N

EPF8820ATC100-2N - FLEX 8000 FPGA, 672 LEs, TQFP-100 | Altera

The Intel (Altera) EPF8820ATC100-2N is a member of the FLEX 8000 family of SRAM-based FPGAs, delivering 672 Logic Elements (LEs), 8 FastTrack Interconnect rows, and 672 flipflops in a 100-pin TQFP (TC100) surface-mount package with industrial operating temperature range. Built on a 0.42 µm CMOS SRAM process, it provides configurable logic blocks (LABs) of 8 LEs each and supports in-system reconfiguration via standard configuration EPROMs or Altera EPC1/EPC1213/EPC1064/EPC1441 serial devices. The FLEX 8000 family combines the architectural advantages of both erasable programmable logic devices (EPLDs) and field-programmable gate arrays (FPGAs). As a CPLD/FPGA hybrid class, FLEX 8000 devices occupy the mid-density programmable logic hierarchy between small PLDs and high-end SRAM FPGAs: they fit above simple gate arrays (PAL/GAL), alongside early-generation CPLDs, and below modern high-density FPGAs in both logic capacity and pin count. Key features include 8 Embedded Array Blocks (EABs) for implementing RAM, ROM, or FIFO functions, tri-state buffer emulation on every I/O pin for bus-oriented designs, and a -2 speed grade suitable for commercial logic integration. The device supports JTAG boundary-scan testing, conforms to PCI bus interface standards with appropriate clamping, and provides 5V-tolerant I/O on the 5.0V VCCIO variant. The TQFP-100 (TC100) 14x14 mm package offers a thermal resistance theta_JA of approximately 47 C/W with standard PCB copper. Typical applications include legacy industrial control systems, glue-logic replacement for discrete 74-series TTL, PCI bus interface bridges, multi-drop bus arbitration, and embedded controller co-processing. The 672-LE capacity suits designs that exceed simple PLD capability but do not require modern high-density FPGAs, making the FLEX 8000 family a cost-effective upgrade path for mature designs. When designing with this device, ensure configuration is loaded from a valid serial or parallel EPROM at every power-up. Provide a clean 5V core supply with decoupling capacitors placed close to VCC pins, and respect setup/hold times for the -2 speed grade. The TC100 package requires a 1.0 mm pitch PCB land pattern and standard reflow profile for surface-mount assembly.

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EPF8820ATC144-1 - FLEX 8000 FPGA, 672 Cells, 112 I/O, 144-TQFP | Altera
EPF8820ATC144-1

EPF8820ATC144-1 - FLEX 8000 FPGA, 672 Cells, 112 I/O, 144-TQFP | Altera

The Altera (now Intel) EPF8820ATC144-1 is a member of the FLEX 8000 family of CMOS SRAM-based Field Programmable Gate Arrays (FPGAs) housed in a 144-pin Thin Quad Flat Pack (TQFP) package. It provides 672 logic cells across 84 Logic Array Blocks (LABs), 112 user I/O pins, and an equivalent gate count of approximately 8,000 usable gates, operating from a 5V supply. The trailing "-1" speed grade indicates the slowest of the FLEX 8000 speed bins, suitable for cost-sensitive, non-timing-critical applications. An FPGA (Field Programmable Gate Array) is a type of integrated circuit containing an array of programmable logic blocks, interconnect resources, and configurable I/O cells that engineers can customize after manufacture. FPGAs sit between fixed-function ASICs and CPLDs in the programmable logic hierarchy, offering higher logic density than CPLDs while remaining factory-reprogrammable. The FLEX 8000 family is configured at system power-up from an industry-standard parallel EPROM, an Altera serial configuration device (EPC1, EPC1064, EPC1213, or EPC1441), or a system controller, and supports MultiVolt I/O for interfacing with 3.3V or 5.0V logic rails. Key features include in-circuit reconfigurability (ICR) via external configuration devices, MultiVolt I/O pin operation, a built-in Joint Test Action Group (JTAG) boundary-scan test interface per IEEE Std. 1149.1, and global routing resources for clock and control distribution. The EPF8820ATC144-1 is fabricated on a 5V CMOS process with SRAM configuration memory and is specified for the commercial operating temperature range of 0C to 70C. Typical applications include glue logic replacement, custom state-machine controllers, bus-interface bridging, and peripheral emulation in industrial control, telecom, and embedded computing systems. The FLEX 8000 architecture is register-rich, with the EPF8820A device providing up to 1,500 flip-flops, making it well-suited to pipelined datapath and small processor glue-logic roles. When designing with this device, ensure that the configuration scheme is selected and validated before PCB fabrication because FLEX 8000 devices are SRAM-based and lose configuration when power is removed. Plan for a non-volatile configuration memory on the board, and verify that JTAG chain ordering, voltage-level translation, and decoupling are sized for the 5V supply rail. For new designs consider Cyclone IV or Cyclone V as modern, lower-power successors. This page synthesizes distributor stock and pricing, pin-compatible drop-in alternatives within the FLEX 8000 family, and practical design notes not consolidated on the manufacturer datasheet.

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EPF8820ATC144-10 - 672-Cell FLEX 8000 FPGA, 144-LQFP, 10ns | Altera
EPF8820ATC144-10

EPF8820ATC144-10 - 672-Cell FLEX 8000 FPGA, 144-LQFP, 10ns | Altera

The Altera EPF8820ATC144-10 is a member of the FLEX 8000 family of CMOS SRAM-based FPGAs, integrating approximately 8,000 usable gates, 672 logic cells, and 84 Logic Array Blocks (LABs) in a 144-pin LQFP (Low-profile Quad Flat Pack) package. Speed grade -10 corresponds to a 10 ns pin-to-pin propagation delay through the logic element, making it the slowest member of the EPF8820A speed-grade ladder. The device is fabricated on a 0.42 µm CMOS process and operates from a 5 V supply with MultiVolt I/O capability allowing 3.3 V or 5.0 V interface voltages on all packages except specific 84-pin variants. What is an FPGA? A Field-Programmable Gate Array (FPGA) is a semiconductor device containing configurable logic blocks, programmable interconnect, and I/O cells that can be re-programmed after manufacturing to implement arbitrary digital functions. Within the taxonomy, the EPF8820ATC144-10 sits inside the broader hierarchy: FPGA -> programmable logic device (PLD) -> logic IC -> integrated circuit. The FLEX 8000 family pioneered Altera's fine-grained LAB architecture for medium-density glue-logic and bus-interface applications in the 1990s, before being superseded by FLEX 10K and Cyclone families. Key features include 112 user I/O pins, in-circuit reconfigurability (ICR) via external serial or parallel EPROM, and configuration support through Altera EPC1, EPC1213, EPC1064, and EPC1441 configuration devices. The 144-pin LQFP package has a 0.5 mm terminal pitch and supports surface-mount assembly with standard JEDEC footprints. Operating temperature range is commercial 0 °C to 70 °C. Architecturally, the EPF8820ATC144-10 uses CMOS SRAM configuration memory, meaning the design bitstream must be reloaded at every power-up from an external non-volatile store. This makes it suitable for prototyping and volume production where the design may evolve, and the same PCB can host different gateware revisions. Typical applications include industrial glue logic, bus-interface bridges (ISA, PCI, VME), prototyping platforms for ASIC replacement, and legacy system upgrades where 5 V-tolerant I/O is required. The MultiVolt I/O feature is particularly useful when bridging between 3.3 V peripherals and 5 V backplanes. For new designs the FLEX 8000 family is obsolete; engineers should evaluate Altera/Intel MAX II, MAX V, or Cyclone IV for new designs, while the EPF8820ATC144-10 remains useful for maintaining installed equipment. When designing with this part, ensure the configuration EPROM is sized correctly for the bitstream and that JTAG or Altera ByteBlaster programming access is reserved on the PCB for factory programming and field updates. Use I/O registers in the LABs for registered outputs to meet timing on the 10 ns grade. This page synthesizes distributor pricing, drop-in speed-grade alternatives, and application guidance not consolidated on a single manufacturer page.

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EPF8820ATC144-11 - FLEX 8000 FPGA 8K Gates 144-TQFP | Altera
EPF8820ATC144-11

EPF8820ATC144-11 - FLEX 8000 FPGA 8K Gates 144-TQFP | Altera

The Intel (formerly Altera) EPF8820ATC144-11 is a member of the FLEX 8000 family of CMOS SRAM-based Field Programmable Gate Arrays, integrating 8,000 usable gates and 672 logic cells in a 144-pin TQFP (Plastic Thin Quad Flat Pack) package. Speed grade -11 indicates a specific propagation-delay bin, with the wider FLEX 8000 family operating up to 125 MHz internally and supporting 112 user I/O in this TQFP-144 form factor. Supply voltage is 5.0 V nominal with MultiVolt I/O capability (3.3 V or 5.0 V tolerance). A Field Programmable Gate Array (FPGA) is a programmable logic device (PLD) whose logic and interconnections are configured by CMOS SRAM cells, distinguishing it from CPLDs (which use non-volatile fuses or flash) and ASICs (custom-masked). Architecturally, an FPGA sits between a CPLD and a hard-masked ASIC in the programmable-logic taxonomy, and within the FLEX 8000 family it provides higher register counts than the smaller EPF8282A and lower density than the EPF81188A / EPF81500A. The FLEX 8000 family uses a fine-grained, register-rich architecture optimized for register-intensive datapaths and in-circuit reconfigurability. Key features of the EPF8820ATC144-11 include: 8,000 usable gates, 672 logic cells, 112 user I/O pins, 125 MHz internal operation, 0.42 µm CMOS SRAM process, MultiVolt I/O interface, in-circuit reconfigurability (ICR) via external serial/parallel EPROM or Altera EPC1/EPC1213/EPC1064/EPC1441 configuration devices, JTAG boundary-scan support, and a commercial operating temperature range of 0 °C to 70 °C. The 144-pin TQFP package measures 20 mm × 20 mm with 0.5 mm pitch. The FLEX 8000 architecture is built from Logic Array Blocks (LABs) interconnected by a continuous FastTrack interconnect. Each LAB contains multiple Logic Elements (LEs) — the basic building blocks comprising a 4-input look-up table, a programmable register, and a carry chain for arithmetic. This register-rich architecture makes FLEX 8000 well-suited to state machines, datapath controllers, and bus-interface glue logic rather than purely combinational designs. Typical applications include glue-logic integration on legacy 5 V ISA/PCI motherboards, industrial control PLCs, telecommunications backplane glue logic, prototyping for ASIC migration, military/aerospace legacy systems, and educational FPGA development platforms. The MultiVolt I/O allows direct interfacing with both 3.3 V and 5.0 V devices without level shifters. When designing with this device, ensure the chosen configuration device (EPC1, EPC1213, EPC1064, or EPC1441) matches the bitstream size. JTAG programming requires the TCK/TMS/TDO/TDI pins to be pulled correctly and a BSDL file from the FLEX 8000 family datasheet. This page synthesizes distributor stock, drop-in Altera/Intel alternatives, and configuration-design guidance beyond the bare datasheet — covering compatibility with the FLEX 8000 family lineup and modern supply-chain alternatives.

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EPF8820ATC144-12 - FLEX 8000 FPGA 8K Gates 144-TQFP | Altera
EPF8820ATC144-12

EPF8820ATC144-12 - FLEX 8000 FPGA 8K Gates 144-TQFP | Altera

The Altera (Intel) EPF8820ATC144-12 is a member of the FLEX 8000 family of SRAM-based Field-Programmable Gate Arrays, delivering approximately 8,000 usable gates in a 144-pin TQFP (Thin Quad Flat Pack) package. The device integrates 672 logic cells organized into 84 Logic Array Blocks (LABs) and provides 112 user I/O pins, supporting 5.0V core and MultiVolt I/O operation for 3.3V or 5.0V interface compatibility. The -12 speed grade denotes the slowest timing bin in the FLEX 8000 lineup, optimized for cost-sensitive designs where maximum clock frequency is not the primary constraint. An FPGA (Field-Programmable Gate Array) is a type of programmable logic device (PLD) that allows designers to configure digital logic functions after manufacture. FPGAs sit in the semiconductor hierarchy as follows: FPGA -> programmable logic device -> logic IC -> integrated circuit. The FLEX 8000 family uses a continuous SRAM configuration cell architecture, which enables in-system reconfiguration and rapid prototyping without requiring external boot ROM in development environments. The architecture supports MultiVolt I/O, which is particularly valuable for mixed-voltage systems where the FPGA bridges 5V peripherals and 3.3V ASICs. Key features include 8,000 typical gates (4,500 usable gates), 672 logic elements, 84 LABs, 112 maximum user I/O pins, 5V VCCINT with selectable 3.3V/5.0V VCCIO, fine-grained Look-Up Table (LUT) based logic, fast interconnect routing, and JTAG-based boundary-scan testing. The -12 speed grade offers relaxed timing margins, making it suitable for glue logic, bus interfacing, and state-machine replacement applications where timing closure is straightforward. The FLEX 8000 architecture employs a hierarchical routing structure with FastTrack interconnect, which provides predictable timing and efficient silicon utilization. Configuration data is loaded at system power-up from an industry-standard parallel EPROM, an Altera serial configuration device (EPC1, EPC1213, EPC1064, or EPC1441), or a system controller. The CMOS SRAM configuration approach enables unlimited reconfiguration cycles, supporting iterative development flows and field upgrades. Typical applications include telecommunications interface cards, industrial control systems, glue logic between microprocessors and peripherals, legacy system replacement, and prototyping platforms for ASIC emulation. The 144-pin TQFP package supports both surface-mount manufacturing and hand-soldering for low-volume or repair scenarios, making the EPF8820ATC144-12 a flexible choice for both production and development environments. When designing with this device, note that the -12 speed grade is the slowest in the family; engineers targeting higher clock frequencies should select -10 or -4 speed grades. The MultiVolt I/O feature requires explicit VCCIO selection (3.3V or 5.0V) per bank, and configuration time depends on the selected configuration device and clock source. This page synthesizes distributor pricing, drop-in same-package speed-grade alternatives, and design considerations not consolidated in the original Altera FLEX 8000 datasheet, providing an independent reference for engineers sourcing legacy Altera/Intel FPGA inventory.

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EPF8820ATC144-15 - FLEX 8000 FPGA 8K Gates 672 Cells | Altera
EPF8820ATC144-15

EPF8820ATC144-15 - FLEX 8000 FPGA 8K Gates 672 Cells | Altera

The Altera EPF8820ATC144-15 is a member of the FLEX 8000 family of CMOS SRAM-based Field Programmable Gate Arrays, providing approximately 8,000 usable gates, 672 logic elements (also called registers), and 112 user I/O pins in a 144-pin TQFP (also referred to as LQFP) package. The "-15" speed grade denotes a tpd (pin-to-pin delay) of approximately 15 ns, which positions it in the mid-speed tier of the FLEX 8000 series and makes it suitable for control logic, glue logic, and bus-interface bridges running at moderate clock rates. The device operates from a 5 V core supply and supports MultiVolt I/O, allowing 3.3 V or 5 V interfacing on the same silicon. A Field Programmable Gate Array (FPGA) is a semiconductor device whose logic and interconnections are configured by the user via SRAM configuration memory, placing FPGAs in the broader hierarchy of programmable logic devices (PLDs) -> FPGAs -> CMOS programmable logic. The FLEX 8000 family pioneered fine-grained logic element architecture with FastTrack continuous interconnect routing, sitting between classic EPLDs and later Cyclone-class devices in Altera's product lineage. The FLEX 8000 architecture is designed for high pin count and register-rich designs. Key features of the EPF8820ATC144-15 include in-system reconfigurability via serial or parallel configuration devices (EPC1, EPC1064, EPC1213, EPC1441), JTAG support via the IEEE 1149.1 boundary-scan interface, and MultiVolt I/O for mixed-voltage system integration. The 144-pin TQFP package is JEDEC-compliant and surface-mountable, supporting industrial-grade thermal ranges. The CMOS SRAM technology provides low static power and unlimited re-programmability, in-circuit reconfigurability (ICR) being a hallmark of the FLEX 8000 family. Architecturally, the EPF8820ATC144-15 implements 672 logic elements arranged into Logic Array Blocks (LABs), each LAB containing eight LEs with a local interconnect. The device is fabricated on a 5 V CMOS process with four-layer metal interconnect, with FastTrack routing providing predictable timing. Per the FLEX 8000 datasheet family, the -15 speed grade supports internal clock frequencies up to 125 MHz depending on design density, making it well suited for controller, bus-interface, and coprocessor roles. Typical applications include bus-interface bridging (e.g., between 5 V and 3.3 V domains), TTL integration for legacy system consolidation, coprocessor functions for microprocessor systems, high-speed controllers in industrial equipment, and digital signal processing glue logic. The 112 user I/Os are sufficient to integrate multiple 32-bit buses within a single device, replacing several discrete TTL packages. Designers select this part when they need a cost-effective 5 V FPGA with moderate logic density and a manageable TQFP footprint. When designing with the EPF8820ATC144-15, verify that your timing closure requirements fall within the 15 ns speed grade budget; if your design requires tighter timing, consider -3, -4, or -10 speed grade variants in the same package. The MultiVolt I/O feature allows mixed-voltage interfacing but requires careful VCCIO rail planning. Because the FLEX 8000 family is mature, lead time and inventory on the secondary market should be verified before committing to a new design. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, helping engineers select the right speed grade and package variant for legacy 5 V FPGA designs.

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