FPGA与CPLD
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EP3C55U484C8 - 55K LE Cyclone III FPGA, 327 I/O, 484-FBGA | Altera
The Altera (Intel) EP3C55U484C8 is a Cyclone III family field-programmable gate array (FPGA) built on a 65 nm low-power process, integrating 55,856 logic elements, approximately 2.4 Mbits of embedded memory, 327 user I/Os, and 156 18x18 hardware multipliers in a 484-ball FineLine BGA package. It targets cost-sensitive, power-conscious digital designs that previously required custom ASICs. What is a Cyclone III FPGA? A field-programmable gate array (FPGA) is a reprogrammable semiconductor device whose logic fabric, routing, and I/O cells are configured by the user via a hardware description language (HDL) bitstream. The Cyclone III family occupies the low-power, low-cost tier of Altera's FPGA hierarchy, sitting below the Stratix series and above legacy Cyclone II. It belongs to the broader class of programmable logic devices (PLDs) that bridge the gap between fixed-function ASICs and software-driven processors. Key features include 4 transceivers-less general-purpose I/O, support for LVDS, LVTTL, SSTL, and HSTL I/O standards, dedicated 18x18 multipliers for DSP blocks, embedded RAM blocks of M9K type, and a Quartus II design flow with support for IP cores and the Nios II soft processor. The device operates from a 1.2 V core supply with separate VCCIO bank voltages, allowing mixed-voltage interfacing without external level shifters. Architecturally, the EP3C55 implements LUT-based logic elements, each containing a 4-input LUT, a programmable register, and carry-chain logic for arithmetic operations. Multipliers are arranged in columns that connect to adjacent LABs (logic array blocks), providing deterministic throughput for DSP pipelines. The PLL count and global clock network support up to 20 clock domains with low skew. Typical applications include industrial motor control, video processing bridges, low-cost DSP co-processors, embedded vision, communications protocol bridging, and ASIC prototyping. The Cyclone III family's balance of logic density, low static power, and large I/O count makes it well-suited to bridge and gateway designs. When designing with this device, ensure proper decoupling of all VCC and VCCIO rails with 0.1 uF and 10 uF capacitors placed close to the package balls. The 484-FBGA requires careful PCB layout to manage signal integrity on high-speed LVDS pairs. This page synthesizes distributor pricing, drop-in alternatives from the same Cyclone III family, and practical design notes not collected in a single place on the manufacturer datasheet.
EP3C55U484C8N - Cyclone III FPGA, 55K LE, 484-UBGA | Intel / Altera
The Intel / Altera EP3C55U484C8N is a Cyclone III Field-Programmable Gate Array (FPGA) integrating 55,856 logic elements, 2,396,160 bits of embedded memory, and 327 user I/Os into a 484-ball Ultra FineLine BGA package. The device is built on a low-power 60-nm process and is offered in a commercial -8 speed grade, targeting cost-sensitive high-volume applications that still require substantial programmable logic capacity. According to the Cyclone III Device Handbook, the EP3C55 family supports up to four general-purpose PLLs per device, embedded multipliers (18x18) for DSP-style signal chains, and a robust clock network with up to 20 global clock lines. A Field-Programmable Gate Array (FPGA) is a programmable semiconductor device whose logic fabric, interconnect, and I/O behavior are defined by a user-supplied configuration bitstream. Within the broader taxonomy, an FPGA sits above standard logic ICs (CPLDs, ASICs) and below high-density SoCs in the programmable-logic hierarchy; the Cyclone III family specifically targets the low-power, low-cost end of that spectrum. Compared with predecessors such as Cyclone II, Cyclone III introduced static power reductions of up to 75 percent while roughly doubling logic density at the same node class. Key features of the EP3C55U484C8N include 55,856 logic elements, 2,396,160 RAM bits (approximately 234 Kbits per embedded M9K block distributed across 250 blocks), 156 embedded 18x18 hardware multipliers, four PLLs, and 327 maximum user I/Os routed through 8 I/O banks. The 484-UBGA package measures 19 mm × 19 mm with 1.0 mm pitch, and the device supports multiple I/O standards including LVDS, SSTL, HSTL, and LVCMOS up to 3.3 V. The -8 commercial speed grade is the fastest Cyclone III speed bin. From an architectural standpoint, the EP3C55 leverages Altera's M9K memory block tiling (each 9 Kbit with true dual-port capability) and dedicated multiplier blocks that free up logic fabric for state machines and glue logic. The combination of high-density logic, generous block RAM, and DSP-grade multipliers enables a single EP3C55 to replace both a microcontroller plus an external DSP in many embedded designs. Typical applications for the EP3C55U484C8N include industrial motor control and factory automation, video processing pipelines, software-defined radio front ends, automotive infotainment prototypes, and telecom line-card glue logic. Its low static power also makes it suitable for portable test and measurement equipment that must remain in standby for long periods. When designing with the EP3C55U484C8N, pay close attention to the eight I/O bank supply rails: each bank can be powered independently, allowing mixed-voltage interfacing without external level shifters. Pair the FPGA with a dedicated configuration PROM such as the EPCS16 or EPCS64 for stand-alone boot. This page synthesizes distributor pricing, drop-in Cyclone III family alternatives, and practical design notes for the EP3C55U484C8N that are not consolidated in a single location in the manufacturer handbook.
EP3C55U484I7 - Cyclone III FPGA 55K LE 484-FBGA | Altera
The Altera (Intel) EP3C55U484I7 is a Cyclone III family Field-Programmable Gate Array (FPGA) built on a 65 nm low-power CMOS process, integrating 55,856 logic elements (LEs) into a 484-ball FineLine BGA package. Operating from a 1.15 V to 1.25 V core supply and supporting up to 327 user I/O pins, this device targets cost-sensitive, high-volume logic integration designs where the FPGA fabric must combine density, embedded memory, and DSP blocks while drawing minimal static power. A Field-Programmable Gate Array (FPGA) is a reprogrammable digital integrated circuit containing an array of configurable logic blocks (CLBs), programmable interconnect, and dedicated hard IP such as block RAM, multipliers, and PLLs. FPGAs sit between fixed-function ASICs and general-purpose microcontrollers, offering hardware-level parallelism for data-path and signal-processing workloads. The Cyclone III family specifically optimises logic density per dollar and per watt, positioning it below high-end Stratix devices in the Altera portfolio but above Cyclone II in features and below Cyclone IV GX in transceiver capability. Key features of the EP3C55U484I7 include 3,491 LABs/CLBs, 2,396,160 bits of embedded RAM (approximately 234 kbit of M9K block RAM equivalent), up to 156 embedded 18x18 multipliers for DSP, four PLLs, and a maximum core clock frequency rated around 437 MHz. The 484-FBGA package measures 19 x 19 mm with a 0.8 mm ball pitch and supports surface-mount reflow assembly. The "I7" speed-grade suffix designates the industrial temperature range, making the device suitable for -40C to +100C ambient operation. Architecturally, the Cyclone III device family is implemented on TSMC's 65 nm process node with a 1.2 V core, achieving notably lower static and dynamic power than the preceding Cyclone II generation. Designers can allocate embedded multipliers as DSP blocks for FIR/FFT pipelines, distribute block RAM across the fabric for buffering, and configure LVDS/LVTTL/PCIe-style I/O through the Quartus II toolchain. The combination of large logic capacity, ample block RAM, and dedicated DSP blocks makes the EP3C55 well-suited for parallel video processing, motor-control front ends, and protocol-bridging applications. Typical applications include industrial machine vision and video pipelines, motor and motion control in factory automation, software-defined radio baseband, telecom protocol conversion, and display controllers. The wide logic capacity also supports multi-protocol bridging in industrial Ethernet gateways and embedded instrumentation. When designing with the EP3C55U484I7, plan the power distribution network carefully: even at modest toggle rates the device can require 3-4 W of core supply, so multiple 0.1 uF + bulk decoupling capacitors are recommended adjacent to each supply ball, and a 4-6 layer PCB with continuous power/ground planes is essential. Verify pinout against the device-specific 484-FBGA ball map because multiple speed-grade and package variants share this footprint.
EP3C55U484I7N - 55K LE Cyclone III FPGA, 484-FBGA | Intel / Altera
The Intel / Altera EP3C55U484I7N is a Cyclone III family Field-Programmable Gate Array (FPGA) IC delivering 55,856 logic elements, 3,491 adaptive logic modules (ALMs), and 2,396,160 bits of embedded memory in a 484-ball FineLine BGA package. It is built on a low-power 65 nm CMOS process and operates from a 1.2 V core supply with industrial-grade -40°C to +100°C junction temperature support, making it well-suited for cost-sensitive, power-aware applications. A Field-Programmable Gate Array (FPGA) is a semiconductor IC containing an array of configurable logic blocks (CLBs/ALMs), programmable interconnect, and on-chip memory that can be customized after manufacturing through a hardware description language (HDL) bitstream. FPGAs sit in the broader hierarchy of programmable logic devices (PLDs), parallel to CPLDs and ASICs, and are typically chosen when time-to-market, in-field reconfigurability, and parallel processing throughput outweigh the per-unit cost of a masked ASIC. Key differentiating features of the EP3C55U484I7N include 327 maximum user I/O pins, 156 embedded 18x18 multipliers, four PLLs for clock synthesis, and support for external memory interfaces including DDR, DDR2, QDRII, and RLDRAM II. The Cyclone III architecture combines a low static and dynamic power budget with high logic density, enabling display controllers, video bridging, motor control, and industrial protocol bridging on a single device. Typical application domains are industrial machine vision, factory automation controllers, video surveillance encoders, automotive infotainment pre-production prototypes, and telecom line-card glue logic. The 484-ball UFBGA at 19 x 19 mm with 0.8 mm pitch supports dense PCB layouts while preserving signal integrity through multiple GND and supply balls. When designing with this device, engineers should use the Altera Quartus II design software (version 13.0 or later with service packs) for synthesis, place-and-route, and bitstream generation. Pay attention to simultaneous switching output (SSO) guidelines, decoupling strategy, and PLL power filtering to meet the Cyclone III datasheet jitter specifications.
EP3C5E144A7N - Cyclone III FPGA, 5K LEs, 144-EQFP | Altera
The Altera (now Intel) EP3C5E144A7N is a low-power Cyclone III Field-Programmable Gate Array built on a 65 nm low-k dielectric process, delivering 5,136 logic elements, 423,936 bits of embedded memory (414 Kbits organized as M9K blocks), 23 embedded 18x18 multipliers, and 94 user I/O across four I/O banks, housed in a 144-pin EQFP (22x22 mm, Plastic Enhanced QFP) package with an exposed thermal pad. It is offered in speed grade 7 and the commercial temperature grade, and is targeted at cost-sensitive, volume-driven digital logic designs where FPGAs were previously considered too expensive. An FPGA (Field-Programmable Gate Array) is a semiconductor device whose logic fabric, routing, and I/O behavior can be reconfigured after manufacturing through a hardware description language (HDL) bitstream. FPGAs sit between fixed-function ASICs and general-purpose microcontrollers in terms of flexibility, parallelism, and per-unit cost, and they coexist with CPLDs in the programmable logic device (PLD) hierarchy. The Cyclone III family specifically emphasizes low static and dynamic power, making it suitable for thermally-constrained and battery-powered systems. Key features of the EP3C5E144A7N include 5,136 four-input LUT-based logic elements, 46 M9K memory blocks totaling 414 Kbits of embedded RAM, four PLLs for flexible clock synthesis and deskew, support for LVDS, SSTL, LVTTL, PCI, and other single-ended and differential I/O standards, and a 1.2 V core supply with separate per-bank VCCIO rails. Configuration is supported via Altera (Intel) Active Serial (AS), Passive Serial (PS), JTAG, and Fast Passive Parallel modes, and the device is supported by the Quartus II / Quartus Prime design toolchain. The Cyclone III architecture uses 4-input look-up tables (LUTs), M9K embedded memory blocks, and dedicated 18x18 multiplier blocks to deliver high DSP throughput for the class. The exposed thermal pad on the EQFP package reduces junction-to-ambient thermal resistance, which is essential when running the FPGA at high toggle rates or in elevated ambient temperatures. Quartus II supports both legacy and current Cyclone III device families, preserving design portability. Typical applications include industrial motor control, LED video wall controllers, low-cost protocol bridges (UART/SPI/I2C-to-LVDS), consumer electronics, portable medical devices, and educational/hobbyist digital design platforms. The 144-EQFP package and 94 user I/O pins allow direct replacement of legacy 144-pin TTL/MSI logic boards. When designing with this device, ensure the exposed pad on the EQFP package is soldered to a thermal land on the PCB; an ungrounded or unsoldered thermal pad will significantly increase junction temperature. Also confirm VCCIO bank voltages match the I/O standard of every connected bus, and verify the configuration mode (AS/PS/JTAG) before laying out the programming header. This page synthesizes distributor pricing, drop-in alternative MPNs, and practical design notes not found in the manufacturer datasheet, helping engineers evaluate the EP3C5E144A7N against its closest Cyclone III family members and competing low-density FPGAs.
EP3C5E144C7 - Cyclone III FPGA, 5K LEs, 144-LQFP | Intel
The Intel (formerly Altera) EP3C5E144C7 is a Cyclone III low-cost FPGA delivering 5,136 logic elements, 423,936 bits of embedded memory, and 94 user I/O pins in a 144-pin LQFP exposed-pad package. Manufactured on a 65nm TSMC low-power process, it operates from a 1.2V core supply and supports up to 437.5 MHz internal operation. The 'C7' speed grade and commercial temperature rating (0C to +85C) make it suitable for cost-sensitive volume production. The 144-LQFP package (EQFP-EP) with exposed thermal pad enables standard SMT assembly without BGA infrastructure. A Cyclone III FPGA is a SRAM-based programmable logic device that combines lookup tables (LEs), embedded memory blocks (M9K), embedded multipliers (18x18), and PLL-based clock management in a single die. FPGAs sit in the programmable logic hierarchy below ASICs but above discrete logic ICs, and are used to implement arbitrary digital glue logic, signal processing pipelines, and custom bus interfaces. Cyclone III specifically targets low-power, low-cost applications such as industrial control, video bridging, and motor drive control where high-end Stratix-series FPGAs are uneconomical. Key features of the EP3C5E144C7 include two PLLs with up to four outputs each for flexible clock synthesis, up to 46 embedded 18x18 multipliers (135 18x18 or 270 9x9 multipliers) for DSP blocks, and configuration support via JTAG, Active Serial, or Passive Serial modes. The device supports Nios II soft-core processors for embedded CPU integration. Embedded memory is organized as 9-Kbit blocks (M9K), totaling 46 blocks. The Cyclone III architecture separates I/O banks into four groups supporting multiple I/O standards including LVTTL, LVCMOS, SSTL, HSTL, PCI, and LVDS on selected pins. The 144-LQFP exposes 94 user I/Os across four banks (top, bottom, left, right), with each bank having its own VCCIO rail for mixed-voltage interfacing. The exposed thermal pad (EP) on the bottom of the package must be soldered to a ground pad on the PCB to meet thermal specifications. Typical applications include industrial motor control (3-phase inverter gate driving and feedback processing), low-cost video processing (HDMI/DVI reformatting, display controllers), USB interface bridging (USB 2.0 device/host controllers), and prototyping platforms for ASIC emulation. Designers using the Quartus II (or Quartus Prime Lite) design software can leverage pre-verified IP cores for common interfaces. When designing with this part, ensure the four VCCIO bank supplies are properly bypassed and that the exposed pad is soldered to a continuous ground plane for thermal dissipation. The Cyclone III family is NRND - for new designs, consider Cyclone IV E or Cyclone 10 LP equivalents with longer lifecycle guarantees. Configuration requires a serial configuration device such as EPCS4 or EPCS16 for standalone operation. This page synthesizes distributor pricing across 20+ sources, drop-in Cyclone III family alternatives, and practical design notes not consolidated in the manufacturer datasheet.
EP3C5E144C7N - Cyclone III FPGA, 5K LE, 144-LQFP | Intel / Altera
The Intel / Altera EP3C5E144C7N is a low-power Cyclone III Field Programmable Gate Array (FPGA) featuring 5,136 logic elements, 423,936 bits of embedded memory, and 94 user I/Os, housed in a 144-pin EQFP (22 x 22 mm, 0.5 mm pitch) package with exposed thermal pad. Built on a TSMC 65 nm low-power process, the 'C7' speed grade variant is specified for a 7 ns propagation delay range and is intended for industrial-grade commercial operating conditions (0C to +85C junction). A Cyclone III FPGA is a programmable logic device that combines lookup-table (LUT)-based logic fabric with embedded memory blocks (M9K), embedded multipliers (18x18), and Phase-Locked Loops (PLLs) on a single die. In the broader taxonomy, the EP3C5E144C7N belongs to the SRAM-based programmable logic family, sitting alongside Cyclone IV (next-generation low-power FPGA), Cyclone V (28 nm successor), and MAX series CPLDs. The device is non-volatile-of-configuration: bitstreams are loaded from external flash or JTAG into on-chip SRAM configuration cells, enabling unlimited re-programmability for prototyping, NPI, and field-upgradable end products. Key features include 5,136 logic elements organized into 290 logic array blocks (LABs), 46 embedded M9K memory blocks (414 Kbits), 46 embedded 18x18 multipliers, and up to 4 PLLs with 4 dedicated clock outputs. The device supports configuration schemes including Active Serial (AS), Passive Serial (PS), Fast Passive Parallel (FPP), and JTAG, and includes Cyclone III architectural primitives such as high-speed LVDS I/O, on-chip termination (OCT), and the Altera remote update IP for in-field bitstream swapping. The 144-pin EQFP package provides a thermal resistance of approximately 22 C/W with a properly soldered exposed pad. The Cyclone III architecture targets cost-sensitive high-volume applications where the previous-generation Cyclone II could not deliver sufficient logic density, DSP bandwidth, or low static power. The 65 nm process enables typical static power in the milliamp range while retaining deterministic timing closure at 200+ MHz for common logic functions and 250 MHz for DSP blocks. I/O banks support LVDS, SSTL, HSTL, LVCMOS, and PCI/PCI-X signaling standards with per-bank voltage reference supplies, enabling direct interface to DDR/DDR2 SDRAM without external level shifters. Typical applications include industrial motor control and PLC logic, video surveillance and image-processing front ends, portable medical instrumentation, low-cost software-defined radio (SDR) baseband, and consumer audio/video processing. The combination of low static power, moderate logic capacity, and a small footprint package makes the EP3C5E144C7N a strong fit for space-constrained, cost-driven designs that still need hardware-accelerated DSP or parallel sensor aggregation. When designing with this device, allocate at least an 8-layer PCB stack-up with continuous GND planes for signal integrity on LVDS pairs, and use the Quartus II / Quartus Prime design suite (13.0 or later recommended for final bitstream) with the Cyclone III device library installed. Decoupling must include 0.1 uF and 10 uF capacitors placed within 5 mm of every VCCIO/VCCINT ball pair, and the exposed thermal pad must be soldered to a 1 sq. inch copper pour to keep junction temperature within the C7 commercial rating. This page synthesizes Cyclone III device specs, Intel / Altera distributor pricing tiers, drop-in same-package and same-family alternatives, and practical Quartus II design notes not found in the standalone manufacturer datasheet PDF.
EP3C5E144C8 - Cyclone III FPGA, 5K LE, 144-EQFP | Intel
The Intel EP3C5E144C8 is a Cyclone III family Field Programmable Gate Array (FPGA) with 5,136 logic elements, 94 user I/Os, and 423,936 bits of embedded memory, fabricated on a 65 nm process and housed in a 144-pin EQFP exposed-pad package. The 'C8' speed grade delivers commercial-temperature operation with a maximum core frequency of approximately 402 MHz, while the device core operates at 1.2 V. An FPGA (Field Programmable Gate Array) is a programmable logic device that combines configurable logic blocks (CLBs), programmable interconnect, and dedicated I/O cells on a single silicon die. FPGAs sit hierarchically within the digital semiconductor stack: FPGA -> programmable logic -> programmable logic device (PLD) -> digital IC -> semiconductor. They are distinguished from CPLDs (less logic, non-volatile) and ASICs (fixed function) by their SRAM-based configuration, parallel architecture, and ability to be re-programmed in-system. The Cyclone III family specifically targets cost-sensitive, low-power applications where high logic density and DSP capability are needed without the expense of high-end FPGAs. Key features include 5,136 logic elements in 321 LABs (Logic Array Blocks), 23 embedded 18x18 multipliers for DSP, 423,936 bits of embedded RAM (RAM bits), 4 PLLs for clock management, and 94 general-purpose I/O pins supporting LVDS, LVCMOS, SSTL, and HSTL I/O standards. The 65 nm process technology reduces static and dynamic power compared to earlier Cyclone generations, and Cyclone III devices do not require a separate configuration device when using active serial (AS) configuration mode. Technical depth: the Cyclone III architecture uses a four-input LUT (Look-Up Table) per logic element, with each LAB containing 16 LEs, dedicated carry chains, and shared arithmetic resources. The embedded multipliers can be configured as 9x9, 18x18, or 36x36 structures, supporting DSP functions up to 287 GMACs (Giga Multiply-Accumulates per second) in the EP3C5. Configuration is supported via JTAG, Active Serial (AS), Active Parallel (AP), and Passive Serial (PS) modes, with Quartus II as the primary design tool. Typical applications include industrial motor control, low-cost video processing, consumer electronics display controllers, telecommunications line cards, and education/hobbyist digital design platforms. The EP3C5E144C8 is well-suited to low-volume prototype systems where an ASIC is uneconomical but where logic density above simple CPLD capacity is required. Design consideration: when migrating designs between Cyclone III speed grades, the 'C8' grade is the slowest commercial part; for timing-critical paths the 'C6' or 'C7' grades provide faster Fmax but typically at higher cost and longer lead time. Verify all I/O bank assignments for LVDS compatibility - the EP3C5 supports LVDS on selected I/O standards only. This page synthesizes Intel datasheet specifications, distributor stock and pricing as of 2026-09-09, drop-in alternative MPNs from the same Cyclone III family, and practical FPGA design notes not assembled in any single manufacturer document.
EP3C5E144C8N - Cyclone III FPGA, 5K LEs, 144-LQFP | Intel
The Intel (formerly Altera) EP3C5E144C8N is a low-power, low-cost Cyclone III Field-Programmable Gate Array (FPGA) built on a 65 nm process, offering 5,136 logic elements, 423,936 bits of embedded memory, and 23 embedded 18x18 multipliers in a 144-pin LQFP exposed-pad package. It operates from a 1.15 V to 1.25 V core supply, supports up to 94 user I/Os, and is rated for a commercial junction temperature range with the C8 speed grade targeting up to 402 MHz internal operation. What is a Cyclone III FPGA? An FPGA (Field-Programmable Gate Array) is a semiconductor device containing programmable logic blocks, interconnect, and I/O cells that engineers can configure after manufacture to implement custom digital circuits. The Cyclone III family sits in the low-power, low-cost tier of the FPGA taxonomy, bridging the gap between small CPLDs and high-end FPGAs. Within Intel's programmable-logic hierarchy, Cyclone III belongs to the cost-optimized Cyclone series, positioned below Cyclone IV/IV GX and Cyclone V for mid-range logic-density applications. Key features of the EP3C5E144C8N include 5,136 vertically arranged logic elements (LEs), 414 Kbits of embedded RAM (M9K blocks), 23 dedicated 18x18 hardware multipliers for DSP, two general-purpose PLLs per device, and support for multiple I/O standards including LVDS, LVTTL, LVCMOS, SSTL, and PCI. The exposed-pad LQFP-144 package provides 94 user I/Os while enabling a low-thermal-resistance PCB land pattern. Architecture-wise, Cyclone III uses a 65 nm low-leakage process to achieve static power below 100 mW, with each logic element containing a 4-input LUT, a programmable register, a carry chain, and a register chain. The device embeds MultiTrack interconnect that delivers predictable timing closure even at 402 MHz fMAX for arithmetic pipelines, while the dedicated 18x18 multipliers accelerate DSP blocks without consuming LE resources. Typical applications include industrial motor control, video processing bridges, low-cost digital signal processing front-ends, glue-logic consolidation, and PCI/PCI-X interface bridges. Engineers also use the EP3C5E144C8N in legacy industrial designs that require a 144-pin LQFP for hand-rework or socketed prototyping where fine-pitch BGA packages are not practical. When designing with this device, plan power sequencing so the 1.2 V VCCINT rail ramps before or simultaneously with the 2.5 V/3.3 V VCCIO rails. Decoupling requires 100 nF X7R capacitors placed within 5 mm of every VCCINT/VCCIO pin pair, and the exposed thermal pad must be soldered to a 1 oz copper pour with thermal vias for heat extraction. Bitstream configuration should use a JTAG or AS (active serial) configuration device such as the EPCS4 or EPCS16. This page synthesizes Cyclone III family datasheet specifications, real-time distributor pricing, and 144-LQFP drop-in alternatives that engineers can evaluate without leaving the product page.
EP3C5E144I7 - Cyclone III FPGA 5K LE, 144-EQFP | Altera / Intel
The Altera (now Intel) EP3C5E144I7 is a low-power, low-cost Cyclone III FPGA from the EP3C5 family, packaged in a 144-pin EQFP (Plastic Enhanced Quad Flat Pack) with exposed thermal pad. The device integrates 5,136 logic elements (LEs), 423,936 bits of embedded memory, and 94 user I/O pins fabricated on TSMC's 65nm low-power process. It is rated for industrial temperature range (-40C to +100C junction) and operates from a 1.2V core supply with separate PLL and I/O bank voltages. An FPGA (Field Programmable Gate Array) is a reprogrammable semiconductor device whose logic fabric is organized as an array of configurable logic blocks (CLBs) connected through programmable interconnect and surrounded by I/O and hard IP blocks (memory, multipliers, PLLs, transceivers). FPGAs occupy the 'programmable logic' tier of the broader semiconductor hierarchy: ASIC < CPLD < FPGA < SoC FPGA < CPU/GPU. Unlike fixed-function ASICs, FPGA logic can be reconfigured in-circuit any number of times, which makes them the standard implementation platform for prototyping, low-volume production, and applications requiring late-stage hardware revision. Cyclone III specifically targets cost- and power-sensitive applications such as industrial control and video/display bridging, where higher-end Stratix devices would be overkill. Key features of the EP3C5E144I7 include two general-purpose PLLs per device, support for multiple I/O standards (LVDS, SSTL, LVCMOS, PCI) with 8 I/O banks, embedded 18x18 multipliers for DSP, and Cyclone III's signature low-power architecture (less than 0.5W static). The 144-pin EQFP exposed-pad package provides enhanced thermal dissipation compared to non-EP variants, important for sustained industrial-grade operation. The device is supported by Altera Quartus II design software (now Intel Quartus Prime) and includes configuration options such as active serial (AS), passive serial (PS), and JTAG. Typical applications span industrial motor control, video processing bridges, automotive infotainment prototypes, custom peripheral glue logic, and portable/mobile embedded platforms. Cyclone III devices balance logic density and power efficiency for designs in the 5K-120K LE range. When designing with the EP3C5E144I7, plan for at least 4 dedicated power rails (VCCINT 1.2V, VCCAUX 2.5V, VCCIO bank-dependent, VCCD_PLL) and follow Altera's decoupling and PCB layout guidelines. Use the Quartus II PowerPlay analyzer early to verify thermal feasibility before committing to PCB layout. This page synthesizes distributor pricing, drop-in pin-compatible variants, and practical Quartus II design notes not consolidated on the manufacturer product page.
EP3C5E144I7N - Cyclone III FPGA, 5K LE, 144-EQFP | Intel
The Intel (formerly Altera) EP3C5E144I7N is a low-power, low-cost Cyclone® III Field-Programmable Gate Array (FPGA) offering 5,136 logic elements, 423,936 bits of embedded memory, and 94 user I/O pins in a 144-pin EQFP (plastic enhanced QFP) package with exposed pad. It is built on a 60 nm, low-k dielectric process and operates from a 1.2 V core supply with industry-leading static power of approximately 30 mW and total power under 0.75 W at full logic utilization. A Field-Programmable Gate Array (FPGA) is a semiconductor device whose digital logic is defined after manufacture by the user, belonging to the broader family of programmable logic devices (PLDs) and sitting alongside CPLDs, ASICs, and microcontrollers as the highest-density option for custom digital hardware. Cyclone III FPGAs specifically occupy the low-power, low-cost tier of Intel's FPGA portfolio, sitting below Cyclone IV/IV GX and above legacy Cyclone II in feature density. Key features of the EP3C5E144I7N include up to 23 embedded 18×18 multipliers (suitable for DSP blocks), 4 PLLs for clock management, support for external memory interfaces including DDR/DDR2/QDRII SRAM, and a maximum internal clock frequency rating of approximately 437.5 MHz. The device supports JTAG (IEEE 1149.1) configuration via Altera/Intel Quartus II design software, with industrial-grade temperature range of -40 °C to +100 °C. Architecturally, the Cyclone III device integrates dedicated RAM blocks (M9K), multiplier blocks, and Logic Array Blocks (LABs), each containing 16 Logic Elements (LEs). The exposed thermal pad on the EQFP-144 package enables PCB thermal dissipation for fanless industrial designs operating continuously at high ambient temperatures. Typical applications include industrial motor control, video processing bridges, low-cost protocol bridging (I2C/SPI/UART to parallel), LED display controllers, handheld test instruments, and consumer electronics requiring custom glue logic. The 1.2 V core simplifies integration with modern low-voltage SoCs and DDR memory interfaces. When designing with this device, ensure the Quartus II version supports the EP3C5 family - Quartus 13.0sp1 or later is recommended, with the older Quartus II Web Edition 9.1 still functional for low-utilization designs. The exposed pad (EP) must be soldered to a thermal land pattern on the PCB for rated thermal performance; failure to do so will derate the device above 1 W total power. This page synthesizes distributor pricing from DigiKey, Mouser and Arrow, drop-in same-family alternatives with identical EQFP-144 footprints, and practical design notes not consolidated in any single distributor listing.
EP3C5F256A7N - Cyclone III FPGA, 5136 LE, 256-FBGA | Intel / Altera
The Intel (formerly Altera) EP3C5F256A7N is a low-power, low-cost Cyclone III Field Programmable Gate Array (FPGA) featuring 5,136 logic elements, 423,936 bits of embedded memory, and 182 user I/O pins, housed in a 256-ball FineLine BGA (FBGA-256) package. Built on a 65 nm CMOS process, this device operates at a 1.2 V core supply and supports automotive-grade qualification per AEC-Q100 across the extended -40 °C to +125 °C temperature range. The Cyclone III family targets high-volume, cost-sensitive applications where FPGA flexibility must coexist with tight power and BOM budgets. A Field Programmable Gate Array (FPGA) is a type of programmable logic device (PLD) that lets engineers implement arbitrary digital logic — from simple glue logic to complete processor cores — through a configuration bitstream loaded into on-chip SRAM. FPGAs sit in the broader hierarchy of programmable logic devices -> programmable logic ICs -> digital ICs -> semiconductors. Unlike ASICs, FPGAs are post-fabrication reprogrammable, enabling rapid prototyping, in-field upgrades, and design error recovery. Cyclone III FPGAs specifically target the low-power, low-density end of the FPGA market. Key features of the EP3C5F256A7N include 321 logic array blocks (LABs), up to 23 embedded 18 × 18 multipliers suitable for DSP operations, embedded M9K memory blocks totaling 423,936 RAM bits, and dedicated global clock networks. The device also includes a hard memory controller, support for external DDR/DDR2 memories, and multiple I/O standards (LVCMOS, LVTTL, LVDS, SSTL) on most user pins. Configuration can be performed via JTAG, Active Serial (AS), or Passive Serial (PS) modes using commodity flash memory. Architecturally, Cyclone III devices use a four-input look-up table (LUT) based logic fabric combined with dedicated routing, variable-sized embedded memory, and hard multipliers. The 65 nm low-power process allows static and dynamic power consumption to be considerably lower than prior Cyclone generations, making the family suitable for thermally constrained enclosures. The device supports hot-socketing and I/O pre-emphasis features that simplify board bring-up. Typical applications include automotive driver-assistance interfaces, industrial machine control, low-cost video processing pipelines, motor drive peripherals, and protocol bridging (I2C/SPI/UART/Ethernet) on factory automation buses. The 256-ball FBGA package exposes enough I/O and memory bandwidth to host a soft Nios II processor plus several custom peripherals in a single device. When designing with this FPGA, allocate at least one configuration mode (typically AS with a serial flash) and provide proper decoupling per the device family datasheet. Thermal dissipation remains modest thanks to the 65 nm low-power process, but designers should still observe the recommended PCB footprint, ball-to-trace via pattern, and keep critical clock traces matched. Verify JTAG chain ordering if multiple devices share the bus. This page synthesizes distributor stock, parametric alternatives, and practical design considerations not found in the manufacturer datasheet alone.
EP3C5F256C6 - Cyclone III FPGA 5K LE, 256-FBGA | Intel / Altera
The Intel (formerly Altera) EP3C5F256C6 is a low-power Cyclone III Field-Programmable Gate Array (FPGA) built on a 65 nm CMOS process, delivering 5,136 logic elements, 182 user I/Os, and 423,936 bits of embedded memory in a 256-ball FineLine BGA (FBGA) package. It operates across a 1.15 V to 1.25 V core voltage range with industrial-grade temperature support, targeting cost-sensitive applications that need a balance of logic density, memory, and DSP capability without the power budget of higher-end FPGA families. A Field-Programmable Gate Array (FPGA) is a type of programmable logic device (PLD) that allows hardware designers to configure digital logic blocks, routing, and I/O after fabrication. Within the broader hierarchy, FPGAs sit below ASICs in performance-per-watt but above CPLDs in logic capacity, making them the workhorse of rapid prototyping, low-volume production, and accelerator designs. The Cyclone III family specifically targets low static and dynamic power consumption versus the older Cyclone II generation. Key features include 5,136 logic elements, 423,936 RAM bits distributed across M9K blocks, 23 embedded 18x18 multipliers for DSP-style arithmetic, and up to 182 general-purpose user I/Os supporting LVDS, LVCMOS, SSTL, and other single-ended standards. The device integrates four phase-locked loops (PLLs) for clock generation and skew management, plus configuration support via active serial (AS), passive serial (PS), and JTAG interfaces. Architecturally, the Cyclone III LE combines a 4-input look-up table (LUT) with a programmable register, embedded memory blocks, and dedicated multiplier hardware on a low-k, 65 nm process. This combination allows designers to implement soft-core processors (such as Nios II), custom peripherals, and DSP datapaths on a single device while keeping power in the hundreds of milliwatts range. Typical applications include industrial motor control and machine vision, low-cost video processing pipelines, communications protocol bridging (SPI, I2C, UART, Ethernet MAC glue logic), consumer electronics display controllers, and educational/development platforms where the Quartus II design toolchain is supported. The 256-FBGA package offers a compact 17 mm x 17 mm footprint with 1.0 mm ball pitch suitable for multilayer PCBs. When designing with this FPGA, plan power sequencing for the core and I/O banks, provide adequate decoupling on every bank supply, and use the Quartus II PowerPlay estimator early to verify thermal margins under your worst-case toggle rate. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the bare manufacturer datasheet.
EP3C5F256C6N - Cyclone III FPGA, 5K LEs, 256-FBGA | Intel
The Intel (formerly Altera) EP3C5F256C6N is a low-power Cyclone III Field Programmable Gate Array (FPGA) with 5136 logic elements, 423936 bits of embedded memory, and 182 user I/Os, housed in a 256-ball FineLine BGA (FBGA-256) package. Built on a 65 nm CMOS process and supplied from a 1.2 V core rail with 3.3 V LVCMOS I/O support, the device targets cost-sensitive, power-aware applications. Operating junction temperature spans 0 C to +85 C in the commercial "C6" speed grade. An FPGA (Field Programmable Gate Array) is a reconfigurable semiconductor containing an array of programmable logic blocks, embedded memory, DSP slices, and programmable I/O cells interconnected by a routing fabric. FPGAs occupy the top of the programmable logic hierarchy below custom ASICs: PLA -> CPLD -> FPGA -> ASIC. The Cyclone III family was engineered as Intel/Altera's lowest-power 65 nm FPGA line, enabling fanless operation in cost-driven designs that previously required discrete logic or microcontrollers. Key features include 23 embedded 18x18 multipliers for DSP, two PLLs per device, support for external memory interfaces such as DDR/DDR2 SDRAM and QDRII SRAM, and configurable I/O standards including LVDS, LVTTL, SSTL, and PCI. The Cyclone III architecture supports up to 120 K logic elements at the family level and ships with Quartus II design tools (now Quartus Prime Lite). Configuration is via serial or parallel flash, JTAG, or AS/PS modes. Typical applications include industrial motor control and human-machine interfaces, video processing pipelines, low-volume ASIC prototyping, consumer display controllers, and portable/wireless protocol bridging. The 256-FBGA package with 1 mm ball pitch supports dense multi-layer PCB layouts while maintaining 17x17 mm board area. When designing with this device, plan I/O bank assignments against VCCIO supply rails, allocate sufficient decoupling per bank, and reserve dedicated clock pins for PLL inputs. Quartus II design software provides free synthesis support for the entire Cyclone III family. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet alone.
EP3C5F256C7 - Cyclone III FPGA, 5,136 LE | Altera
The Altera EP3C5F256C7 is a Cyclone III FPGA that integrates 5,136 logic elements, 423,936 RAM bits and 182 user I/O pins in a 256-ball LBGA package. Built on a 65 nm process with a 1.2 V core supply, it is rated for a listed 437.5 MHz internal clock frequency and is intended for low-cost, high-volume logic integration in commercial equipment. An FPGA, or field-programmable gate array, is a reconfigurable integrated circuit whose logic fabric, routing and I/O behavior are defined after manufacturing by a configuration bitstream. Inside an FPGA hierarchy, the EP3C5F256C7 belongs to FPGA -> programmable logic -> integrated circuit, sitting above CPLDs in density but below high-end transceiver-rich FPGAs. Designers use FPGAs when requirements change after production or when parallel, low-latency custom datapaths are more efficient than a microcontroller or ASIC. The Cyclone III family specifically targets low-power, cost-sensitive applications. Key features include 5,136 logic elements for implementing state machines, counters and datapath logic; 423,936 RAM bits for FIFO and line buffers; 182 user I/O configured to various voltage levels and I/O standards; and a 256-ball BGA enabling compact routing. The 1.2 V core and 65 nm process reduce static and dynamic power relative to older 90 nm FPGAs. The commercial C7 ordering grade balances speed and temperature for standard equipment. At the architecture level, the 65 nm fabric uses logic array blocks connected by programmable routing; embedded memory and I/O elements are fixed resources surrounding the core. Designers compile HDL with Intel/Altera Quartus II or Quartus Prime, which maps logic, performs placement and routing, and generates bitstreams stored in EPCS or EPCQ serial configuration devices. The 437.5 MHz figure from distributor data indicates the internal clock performance achievable for speed grade 7 in favorable designs; final Fmax depends on placement, fanout and I/O standard. The 256-ball LBGA package is square with ball terminals, allowing four-layer board integration. Typical applications include motor-control platforms requiring flexible I/O mapping, low-cost video processing where parallel pixel data is manipulated, industrial communication bridges, and test instruments. Its 5,136 logic elements fit compact soft processors, custom serial interfaces and real-time control. Design with adequate decoupling on VCC, VCCIO and PLL supplies, and store the configuration bitstream in a dedicated serial configuration memory. Because this density offers only 182 I/O, verify pin assignments before layout and review power integrity at the 1.2 V core. This page compounds distributor pricing and availability, same-family drop-in alternatives, and practical integration notes beyond the raw datasheet. Facts here were checked against DigiKey, Mouser, Heisener, Octopart and datasheet-aggregator records in September 2026.
EP3C5F256C7N - Cyclone III FPGA, 5K LEs, 256-FBGA | Intel / Altera
The Intel / Altera EP3C5F256C7N is a low-power Cyclone® III Field-Programmable Gate Array (FPGA) delivering 5,136 logic elements, 423,936 bits of embedded memory, and 182 user I/Os in a 256-ball FineLine BGA (FBGA-256) package. Built on a 65 nm low-power process, this Cyclone III device targets cost-sensitive, high-volume applications where low static and dynamic power consumption matter as much as logic density. The 'F256' suffix denotes the 256-pin FBGA package, the 'C7' speed grade indicates a commercial -7 timing bin, and the trailing 'N' marks lead-free / Pb-free assembly. A Field-Programmable Gate Array (FPGA) is a reconfigurable integrated circuit whose logic fabric, routing, and I/O blocks can be programmed after manufacturing to implement arbitrary digital functions. The Cyclone III family sits within Intel's (formerly Altera's) low-cost FPGA portfolio, hierarchically positioned as: logic element -> Logic Array Block (LAB) -> FPGA fabric -> programmable logic device (PLD) -> semiconductor. Compared with CPLDs and small ASICs, FPGAs offer parallel processing, hardware-timed I/O, and on-chip memory blocks suited to data-path, glue-logic, and signal-processing tasks. The EP3C5 sits at the entry of the Cyclone III range, making it ideal for bridging CPLD-scale designs into FPGA-class performance. Key features of the EP3C5F256C7N include up to 182 general-purpose I/Os with support for multiple I/O standards (LVDS, LVTTL, LVCMOS, SSTL, HSTL), embedded 18x18 multipliers for low-density DSP tasks, and up to 46 embedded M9K memory blocks (approximately 414 Kbits of RAM). The device supports configuration via JTAG, Active Serial (AS), Active Parallel (AP), and Passive Serial (PS) modes, with built-in compression and decompression of configuration bitstreams. On-chip PLLs allow frequency synthesis and clock-tree management for multi-domain designs. Typical applications include industrial control and motor drive interfaces, low-cost video processing pipelines, I/O expansion and protocol bridging (UART, SPI, I2C, parallel buses), LED display controllers, and consumer-electronics glue logic. The 256-FBGA package offers compact board area while preserving high I/O count and signal integrity for mixed-signal boards. Designers should evaluate Quartus II / Quartus Prime for synthesis and timing closure, and verify the -7 commercial speed grade against their target fMAX requirements.
EP3C5F256C8 - Cyclone III FPGA 5K LE, 256-FBGA, -40 to 125C | Intel
The Intel (formerly Altera) EP3C5F256C8 is a low-power Cyclone III Field Programmable Gate Array (FPGA) with 5,136 logic elements, 423,936 bits of embedded memory, and 182 maximum user I/O pins, housed in a 256-ball FineLine BGA (FBGA-256) package. It operates across the commercial-to-industrial -40°C to +125°C junction temperature range and targets cost-sensitive, power-sensitive programmable logic designs. A Field Programmable Gate Array (FPGA) is a type of integrated circuit that can be reconfigured by the customer after manufacture to implement arbitrary digital logic. FPGAs sit in the broader taxonomy of programmable logic devices (PLD) -> complex programmable logic devices (CPLD) -> FPGAs -> semiconductor ICs, and are used wherever a fixed-function ASIC is too expensive or inflexible. Cyclone III devices in particular occupy the low-power, low-cost end of the FPGA hierarchy, optimized for volume production in industrial, consumer, and communications systems. Key features of the EP3C5F256C8 include up to 5,136 logic elements (LEs), 423,936 total RAM bits (approximately 414 Kbits of M9K block memory), 182 maximum user I/O pins, two general-purpose PLLs per device quadrant, and 4-Mbit flash configuration storage support via serial or parallel configuration schemes. The Cyclone III architecture uses a 65 nm low-power process and supports LVDS, LVTTL, LVCMOS, SSTL, and HSTL I/O standards, allowing direct interface to DDR/DDR2 memory and a wide range of microcontrollers. The Cyclone III family combines hard multipliers for DSP, embedded memory blocks, and a global/regional clock network, enabling applications in motor control, video processing, and software-defined radio without external DSP or memory devices. The device supports Nios II embedded processor soft cores, allowing on-chip microcontroller functionality. Configuration can be loaded via JTAG, Active Serial (AS), Passive Serial (PS), or Fast Passive Parallel (FPP) modes. Typical applications include industrial machine vision, factory automation controllers, motor and motion control drive boards, low-cost software-defined radio front-ends, video surveillance recorders, and consumer display controllers. The 182 I/O count and 256-FBGA footprint are ideal for medium-density glue-logic replacement, custom interface bridging, and protocol conversion designs. When designing with this FPGA, ensure the JTAG chain is properly terminated and that decoupling capacitors are placed as close as possible to all VCCINT, VCCA, and VCCIO pins per the Cyclone III Hardware Reference Manual. Thermal management via copper pours under the BGA is essential for sustained operation near the 125°C junction limit, especially when many I/O banks toggle simultaneously at high speed. This page synthesizes distributor pricing, drop-in same-package alternatives from the Cyclone III family, and practical design notes not found in the manufacturer datasheet alone.
EP3C5F256C8N - Cyclone III FPGA 5K LEs 256-FBGA | Intel
The Intel (formerly Altera) EP3C5F256C8N is a Cyclone III Field-Programmable Gate Array (FPGA) integrating 5,136 logic elements, 423,936 bits of embedded SRAM, and 23 dedicated 18x18 multipliers, housed in a 256-ball FineLine BGA (FBGA-256) package. The device operates from a 1.15 V to 1.25 V core supply with 4 PLLs and supports 182 user I/Os across multiple voltage-referenced banks. An FPGA is a type of programmable logic device containing an array of configurable logic blocks, programmable interconnect, and embedded memory/DSP blocks that can be re-programmed in-system by manufacturers or end users after PCB assembly. Within the semiconductor taxonomy, FPGAs sit between fixed-function ASICs and software-programmable microcontrollers: they deliver hardware-level parallelism and deterministic timing while still allowing iterative logic revision. The Cyclone III family specifically targets the low-power, low-cost segment of the FPGA hierarchy (FPGA → programmable logic → PLD → digital IC), making it well suited to cost-sensitive, high-volume designs that still require hardware acceleration and parallel DSP throughput. Key features of the EP3C5F256C8N include 5,136 logic elements organized into Logic Array Blocks (LABs), 423,936 bits of embedded memory (RAM), 23 embedded 18x18 multipliers for DSP, 4 phase-locked loops (PLLs), and 182 maximum user I/Os. The device supports multiple I/O standards including LVDS, LVTTL, LVCMOS, SSTL, and HSTL via per-bank VCCIO references. The SRAM-based configuration cells enable unlimited in-system re-programmability, and the 65 nm process technology delivers an optimal balance of logic density and static power (~0.5 mW per LE typical) for thermally constrained or battery-aware designs. Architecturally, the device arranges its 5,136 logic elements into vertically organized LABs, interconnected by a hierarchical MultiTrack interconnect fabric with low-skew clock distribution. The 23 dedicated 18x18 multipliers enable efficient DSP operations without consuming general-purpose logic resources, supporting parallel arithmetic at clock rates up to 402 MHz internal. Typical applications include industrial control and machine networking, video surveillance and image processing, low-cost digital signal processing, motor control and encoder interfacing, automotive telematics, serial protocol bridging (UART/SPI/I2C to high-speed interfaces), consumer electronics display controllers, and portable test and measurement equipment. The Cyclone III family's low static power makes it particularly suitable for thermally constrained or fan-less designs. When designing with this device, ensure adequate decoupling on every PLL and core rail and ROCm decoupling on all supply rails and that the configuration mode (AS, PS, JTAG, or Fast Passive Parallel) matches the system's boot strategy. Designers migrating to newer Intel Cyclone families should plan for I/O bank voltage and pin-out differences even when targeting the same FBGA-256 footprint, and validate JTAG/AS programmer compatibility with the Quartus II toolchain. This page synthesizes distributor pricing, same-family drop-in alternatives, and practical design considerations not consolidated in the original Altera Cyclone III handbook, giving procurement and engineering teams a single reference for the EP3C5F256C8N.
EP3C5F256I7 - Cyclone III FPGA 5136 LE 256-BGA | Intel
Intel EP3C5F256I7 is a Cyclone III field-programmable gate array (FPGA) containing 5,136 logic elements, 423,936 RAM bits, and up to 182 user I/O pins in an industrial-temperature 256-ball FineLine BGA (FBGA-256) package. It is used in cost-sensitive applications that need reprogrammable parallel logic rather than a fixed-function ASIC or MCU. An FPGA is an integrated circuit whose digital logic can be configured by the designer after manufacturing. In the component hierarchy, an FPGA is a programmable logic device (PLD) under the broader integrated circuit category, and it differs from a microcontroller by implementing parallel hardware logic instead of sequential software instructions. The EP3C5F256I7 is part of Intel's Cyclone III family, a mid-capacity low-cost FPGA line that balances logic density, memory, I/O count, and package size for industrial and communications systems. The EP3C5F256I7 combines 5,136 logic elements with 423,936 bits of embedded RAM, 182 user I/O pins, and a 256-ball FBGA package. This capacity allows small state machines, UART/SPI bridges, FIFO buffers, image line buffers, motor-control logic, and communication protocol engines to be implemented in a single device. The industrial-temperature ordering option indicates the device is intended for extended-temperature equipment rather than consumer-only environments. The device uses a square, ball-terminated FBGA-256 package with a lead-free finish according to the verified distributor listing. The high user-I/O count exposes most internal signals to board-level interfaces, making the FPGA practical as a glue-logic, pre-processing, or interface bridging element in a larger electronic system. Because Cyclone III devices are SRAM-based FPGAs, they require an external configuration device or host controller to load the bitstream after power-up. Typical applications include industrial motor and PLC control, machine-vision image preprocessing, Ethernet and serial protocol bridging, data-acquisition front ends, and medical monitoring equipment. The 182 user I/O signals can connect to ADCs, DACs, sensors, memory buses, transceivers, and parallel LCD or LED interfaces. When designing with the EP3C5F256I7, plan for BGA fanout and adequate power decoupling, and verify that the external configuration-source choice is compatible with required boot time and update flow. Use Intel Quartus software for pin assignment validation against the target board footprint. The package and pin count are significant PCB layout constraints. This page adds practical value beyond a datasheet by combining distributor sources, same-family drop-in alternatives, estimated pricing, design guidance, and application context that helps engineers confirm the EP3C5F256I7 fits before committing to a layout.
EP3C5F256I7N - Cyclone III FPGA, 5K LEs, 256-FBGA | Intel
The Intel (Altera) EP3C5F256I7N is a low-cost, low-power Cyclone III Field-Programmable Gate Array (FPGA) featuring 5,136 logic elements, 423,936 bits of embedded memory, and 182 user I/Os in a 256-pin FineLine Ball-Grid Array (FBGA) package. Built on a TSMC 65nm low-power process, the device integrates 26 embedded 18x18 multipliers, 23 embedded PLLs, and supports configuration via active serial, passive serial, JTAG, or Fast Passive Parallel modes. An FPGA (Field-Programmable Gate Array) is a semiconductor device containing an array of configurable logic blocks (CLBs), programmable interconnects, and dedicated hard IP blocks that engineers can re-program after manufacture to implement custom digital logic. FPGAs sit at the top of the programmable logic hierarchy alongside CPLDs (Complex Programmable Logic Devices), and are distinguished from ASICs by their in-system re-programmability, faster prototyping cycles, and lower upfront NRE costs. The Cyclone III family targets cost-sensitive, high-volume applications where traditional FPGAs were too expensive or power-hungry. Key technical features include 66 embedded 9-bit multipliers (configurable as 26 18x18 multipliers), 423,936 total RAM bits organized as M9K memory blocks, two PLLs per quadrant for fine-grained clock management, and 1.0V/1.2V core operation with LVDS, LVTTL, LVCMOS, SSTL, and HSTL I/O standards. The device supports up to 472.5 MHz internal operation and is qualified for industrial temperature range (-40C to +125C). The Cyclone III architecture separates logic, routing, and dedicated DSP/memory resources into four quadrants, allowing predictable timing closure. Hard IP blocks (PLLs, multipliers, M9K RAMs) reduce logic-element usage and lower power compared to soft implementations, making EP3C5F256I7N well suited to motor control, video processing, and industrial protocol bridging where deterministic performance and low static power are required. Typical applications include industrial motor control and encoder interfacing, video surveillance image preprocessing, low-cost protocol bridges (UART/SPI/I2C to Ethernet), automotive infotainment sub-systems, and LED display controllers. The 256-FBGA package provides high I/O density in 17x17 mm, suitable for compact PCBs requiring up to 182 user I/Os. When designing with EP3C5F256I7N, ensure the Quartus II / Quartus Prime toolchain version matches the silicon revision, and follow Intel's recommended decoupling scheme (100 nF + 10 uF per power pin). For multi-rail sequencing, the device does not include an internal POR - use an external supervisor IC. The 256-FBGA requires 1.0 mm pitch, NSMD land pads with 0.4 mm diameter for reliable reflow. This page synthesizes distributor pricing, drop-in same-package alternatives (all in the 256-FBGA footprint), and practical Quartus toolchain guidance not consolidated in the manufacturer datasheet.
EP3C5M164C7N - Cyclone III FPGA 5K LEs 164-MBGA | Intel / Altera
The Intel (formerly Altera) EP3C5M164C7N is a low-power, low-cost Cyclone III Field Programmable Gate Array (FPGA) housed in a 164-ball FineLine BGA (MBGA, 8x8 mm, 0.5 mm pitch) package, featuring 5,136 logic elements, 423,936 bits of embedded memory, and 106 user I/O pins. Built on a 65 nm TSMC low-power process, the device targets cost-sensitive, volume-driven digital logic applications that previously required ASIC-class integration. The 'C7N' suffix denotes the commercial 0C to +85C operating range with Pb-free / lead-free packaging. A Field-Programmable Gate Array (FPGA) is a semiconductor integrated circuit composed of configurable logic blocks (CLBs), programmable interconnect, embedded memory, and hardened I/O, all of which can be re-wired by the user after manufacturing. FPGAs sit hierarchically between standard microcontrollers and ASICs in the design complexity spectrum, offering hardware-level parallelism that microcontrollers cannot match, while costing far less than a full ASIC for low-to-medium volumes. The Cyclone III family specifically targets applications requiring thousands of logic elements at single-digit-watt power budgets. Key features of the EP3C5M164C7N include 5,136 logic elements, approximately 423 Kbits of embedded M9K RAM, 23 embedded 18x18 multipliers (PLL/DSP blocks), up to 4 PLLs for clock management, and support for external memory interfaces including DDR/DDR2/QDRII SDRAM. The 164-MBGA package combines small footprint with high I/O count, and the commercial temperature grade suits industrial control, consumer electronics, and prototype designs. Typical applications include motor control and drive interfaces, LED display controllers, video processing pipelines, industrial machine vision, low-cost software-defined radio front-ends, and educational/development platforms where a balance of logic capacity, I/O count, and unit cost is critical. The 164-ball MBGA package also enables compact PCB layouts in space-constrained products. When designing with this device, ensure proper decoupling (100 nF + bulk caps near each VCC/ground pair), strict length-matched routing for DDR memory interfaces, and adequate thermal relief via inner copper ground planes. The configuration scheme (JTAG, AS, or PS) must be decided early; the EPCS serial configuration device typically pairs with Cyclone III in production.
EP3C5M164C8N - Cyclone III FPGA, 5136 LEs, 164-MBGA | Altera
The Altera (Intel) EP3C5M164C8N is a low-power Cyclone III Field Programmable Gate Array (FPGA) built on a 65 nm process, offering 5136 Logic Elements (LEs), 414 kbit of embedded memory, and 23 dedicated 18x18 embedded multipliers. It is housed in a 164-ball Micro FineLine BGA (MBGA) package and operates from a 1.15 V to 1.25 V core supply at a maximum internal clock frequency of 402 MHz, with up to 106 user I/O pins. A Field Programmable Gate Array (FPGA) is a type of programmable logic device that combines programmable logic fabric (lookup tables, flip-flops, routing, and embedded memory blocks) into a single semiconductor IC. FPGAs sit within the broader hierarchy of programmable logic devices -> logic ICs -> integrated circuits -> semiconductors, and are used when design requirements include parallelism, real-time signal processing, or post-manufacture reconfigurability. Cyclone III is positioned as a low-cost, low-power family in Altera's (now Intel) FPGA portfolio, optimized for high-volume cost-sensitive applications. Key features include 5,136 vertically arranged Logic Elements, 423,936 bits of total embedded memory organized into M9K blocks, 23 18x18 hardware multipliers, two PLLs per device for clock management, and support for common I/O standards such as LVDS, LVCMOS, SSTL, and PCI. The device is available in commercial (C8, -40C to +85C) and industrial (I7/I8, -40C to +100C) temperature grades. The Cyclone III architecture integrates logic, DSP blocks, and memory in a tile-based fabric. The 65 nm process enables low static and dynamic power, while the 18x18 multipliers support efficient DSP operations such as FIR filters and FFTs. The PLLs provide frequency synthesis, phase shifting, and clock deskewing for high-speed designs. Typical applications include industrial control and motor drive, consumer video processing, automotive infotainment, software-defined radio front-ends, low-cost prototyping, and embedded DSP systems. The 164-MBGA package supports a compact PCB footprint while providing 106 user I/O pins for moderate-density designs. When designing with this device, ensure the 1.2 V core supply is properly decoupled with low-ESR ceramic capacitors placed close to the power pins, and follow Altera's Cyclone III Hardware Reference Manual for configuration pin connections (MSEL[3:0], nCONFIG, nSTATUS, CONF_DONE) to select the appropriate configuration mode. This page synthesizes distributor pricing, drop-in package alternatives within the Cyclone III family, and practical design notes not found in the manufacturer datasheet.
EP3C5M164I7 - Cyclone III FPGA, 5K LE, 164-MBGA | Intel
The Intel (formerly Altera) EP3C5M164I7 is a low-power Cyclone III field-programmable gate array (FPGA) with 5,136 logic elements, 423,936 bits of embedded memory, and 106 user I/O pins, housed in a 164-ball FineLine BGA (MBGA) package. Built on a 65 nm low-power process, it integrates up to 23 embedded 18x18 multipliers, 2 PLLs per device quadrant, and supports Nios II embedded processor soft cores for custom SoC designs. The industrial temperature grade (-40C to +100C junction) is denoted by the trailing "I7" in the MPN. A Field Programmable Gate Array (FPGA) is a reconfigurable integrated circuit whose logic fabric, routing, and I/O behavior can be programmed after manufacture. Within the broader semiconductor taxonomy, the EP3C5M164I7 sits in the programmable logic device (PLD) hierarchy: FPGA -> PLD -> logic IC -> integrated circuit. Cyclone III specifically targets cost- and power-sensitive applications that need DSP, memory buffering, and parallel I/O without the cost of high-end Stratix-class FPGAs. Key features include 5,136 logic elements (LEs), 423,936 bits (approximately 50 Kbyte) of embedded SRAM distributed in M9K blocks, up to 23 dedicated 18x18 multipliers for DSP operations, and 4 PLLs for clock management. The 164-MBGA package offers a compact 8x8 mm footprint, ideal for space-constrained boards. The device supports LVDS, LVTTL, LVCMOS, SSTL, and HSTL I/O standards with hot-socketing capability and supports configuration via JTAG, Active Serial (AS), Passive Serial (PS), and Fast Passive Parallel (FPP) modes. Typical applications include industrial motor control, video bridging, sensor aggregation, low-cost DSP front-ends, and I/O expansion for microcontrollers. The 164-ball BGA provides sufficient I/O count for parallel RGB video capture, multi-channel UART/SPI bridging, and high-speed ADC/DAC interfacing. Designers favor Cyclone III for price-sensitive production runs where the legacy Altera toolchain (Quartus II) and IP libraries are already in use. When designing with this FPGA, plan for 1.2 V core and 2.5 V/3.3 V I/O supply rails with proper decoupling (100 nF + 10 uF near each supply pin). The MBGA package requires careful PCB stack-up with microvia technology for breakout; verify thermal performance at full DSP utilization since the 65 nm process can dissipate 0.5-1 W under heavy logic toggling. This page synthesizes current distributor stock and pricing, drop-in same-family alternatives from the Cyclone III family, and practical design notes not aggregated on a single manufacturer page, including PCB layout, configuration, and thermal guidance for the 164-MBGA package.
EP3C5M164I7N - Cyclone III FPGA 5136 LE 164-MBGA | Intel
The Intel (Altera) EP3C5M164I7N is a Cyclone III Field Programmable Gate Array (FPGA) with 5,136 logic elements, 423,936 bits of embedded RAM, 23 embedded 18x18 multipliers, and 106 user I/O pins, housed in a 164-ball Micro BGA (M164, 8x8 mm) package with a 1.2 V core and speed grade 7. An FPGA (Field Programmable Gate Array) is a reprogrammable digital logic IC that lets engineers implement arbitrary logic, DSP, and memory subsystems by configuring an array of configurable logic blocks (CLBs) connected through a programmable interconnect fabric. FPGAs sit in the broader hierarchy of programmable logic devices (PLDs) -> programmable logic -> digital ICs -> semiconductors. They are distinct from ASICs because they are not mask-programmed: configuration is loaded from external flash at power-up, enabling fast prototyping and field updates. Cyclone III belongs to Intel's (formerly Altera's) low-cost, low-power FPGA family targeting cost-sensitive volume applications rather than high-performance transceivers. Key differentiating features include the Cyclone III family's industry-leading low static and dynamic power for a 60 nm FPGA, 4-Mbit embedded memory blocks for buffer/RAM-intensive designs, dedicated hardware multipliers that accelerate DSP operations up to 18x18, and a flexible I/O bank structure supporting LVDS, SSTL, HSTL, and LVCMOS standards. The M164 Micro BGA footprint reduces board area versus TQFP packages while still enabling low-cost PCB fabrication with 0.5 mm pitch. Architecturally, the device arranges logic elements into LABs (Logic Array Blocks), each containing 16 LEs, with M9K memory blocks distributed throughout the fabric. The configuration controller supports passive serial (PS), fast passive parallel (FPP), and active serial (AS) modes via industry-standard EPCS configuration devices. Periphery includes four general-purpose PLLs with spread-spectrum clocking, and each I/O bank has its own VREF pins for reference-voltage-based standards. Typical applications include industrial motor control and machine vision, low-cost video processing and display controllers, consumer electronics glue logic, and telecom line-card interface bridges. The Cyclone III is also widely used in education and prototyping kits (such as the Altera/Intel DE0-Nano family) because of its favorable price-per-logic-element ratio. When designing with the EP3C5M164I7N, ensure your Quartus II project sets the correct device package (M164) and speed grade (7) so timing analysis is accurate, and provide a low-noise 1.2 V core supply with bulk decoupling near each VCCINT pin. For multi-bank I/O standards, segregate SSTL/HSTL banks from LVCMOS banks using separate VCCIO rails to avoid contention. This page consolidates Cyclone III family datasheet parameters, drop-in 164-MBGA alternatives, and design notes that go beyond the standard manufacturer datasheet to help engineers select and qualify the part quickly.