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EPC2TI32 - 1.6Mb In-System Prog Config PROM | Altera (Intel)
The Altera (Intel) EPC2TI32 is a 1.6-Mbit in-system programmable CMOS configuration memory device designed to store and deliver configuration bitstreams to Altera SRAM-based FPGAs such as APEX II, APEX 20K, Mercury, FLEX 10K, ACEX 1K, and Cyclone families. Packaged in a 32-pin TQFP (7x7 mm) and operating from a single 5 V or 3.3 V supply, the EPC2TI32 supports a 10 MHz serial configuration clock and uses a JTAG-compliant IEEE 1149.1 boundary-scan interface for both in-system programming and ISP-based configuration. Key headline parameters are 1.6 Mbit density, 32-pin TQFP package, and 10 MHz configuration clock rate. A configuration PROM is a non-volatile serial memory that holds the FPGA's configuration bitstream. When the system powers up or when a reconfiguration is requested, the FPGA's controller reads the bitstream serially from the PROM through dedicated configuration pins (DATA, DCLK, nCONFIG, nSTATUS, CONF_DONE). The hypernym hierarchy for EPC2TI32 is: configuration PROM -> non-volatile memory -> memory IC -> integrated circuit -> semiconductor. Configuration PROMs replaced legacy EPROM-based configuration methods by eliminating the need for external programmers and enabling on-board upgrades via JTAG. Key features of the EPC2TI32 include 1.6 Mbit (2 Mbit logical, 1.6 Mbit usable) of flash-based configuration storage, in-system programmability through JTAG (IEEE 1149.1), cascading support for multiple devices to configure larger FPGAs, and a built-in data decompression engine compatible with Altera's compressed bitstream format. The 10 MHz DCLK supports typical configuration times of approximately 200 ms for an APEX 20K100 device. The 32-pin TQFP package is industry-standard and supports conventional SMT assembly. Typical applications include APEX II / APEX 20K / FLEX 10K / ACEX 1K / Cyclone FPGA configuration memory, single-FPGA and multi-FPGA cascading configurations, industrial control boards requiring in-field firmware updates, telecom line cards with remote bitstream updates, and prototyping platforms that require rapid bitstream iteration via JTAG. The wide operating voltage range (3.0 V to 5.5 V) makes the EPC2TI32 suitable for legacy 5 V systems as well as modern 3.3 V designs. When designing with the EPC2TI32, ensure that the JTAG chain order matches the silicon revision of your target FPGA, and that the CONF_DONE pull-up resistor is sized correctly per the Altera application note AN-123. For modern Cyclone IV or later FPGAs, EPCS serial configuration devices are typically preferred, but EPC2TI32 remains a robust choice for legacy 5 V APEX/FLEX systems.
EPC2TI32N - 1.6Mb ISP Configuration PROM for FPGA | Altera / Intel
The Altera / Intel EPC2TI32N is a 1.6-Mbit In-System-Programmable (ISP) configuration PROM designed to store and load configuration bitstreams for SRAM-based Altera / Intel FPGAs, housed in a 32-pin TQFP (7x7 mm) package. It supports 3.3 V (3.0 V to 3.6 V) and 5.0 V (4.5 V to 5.5 V) supply operation with an industry-standard JTAG (IEEE 1149.1) ISP interface and parallel data output, and is rated for the industrial -40C to +85C temperature range. What is a configuration PROM? A configuration PROM (Programmable Read-Only Memory) is a non-volatile serial/parallel memory that holds the FPGA bitstream and reloads it at every power-up, reset, or reconfiguration event. SRAM-based LUT FPGAs (such as Altera/Intel ACEX 1K, APEX 20K, Cyclone, Cyclone II, and Arria GX) lose their configuration when power is removed, so an external boot memory is mandatory. Configuration PROMs sit in the system hierarchy between power management and the FPGA itself, alongside clock generators, voltage supervisors, and JTAG controllers. Key features include 1.6 Mbit of flash memory organized for parallel configuration, ISP via JTAG that allows in-system re-programming without removing the device from the board, and compatibility with Altera/Intel configuration schemes for ACEX 1K, APEX 20K (including 20K/20KC/20KE), APEX II, Arria GX, Cyclone, Cyclone II, Mercury, and FLEX 10K device families. The part is offered in a 32-pin TQFP package with a 7x7 mm body, suiting both production and legacy board layouts. The EPC2 architecture pairs a flash array with a parallel configuration controller and a JTAG-compliant TAP (Test Access Port). On power-up, the device automatically serializes/parallelizes the stored bitstream out to the FPGA via dedicated configuration pins (nCONFIG, nSTATUS, CONF_DONE, DCLK, DATA). Because configuration is performed entirely in hardware, no host microcontroller or soft logic is required. Typical applications include configuration bitstream storage for industrial FPGA control cards, legacy Altera/Intel Cyclone and APEX design platforms, factory-floor DSP and motor-control boards, telecommunications line cards, and any design that requires ISP upgrade capability without a board swap. When designing with EPC2TI32N, pay attention to the JTAG chain order: if the FPGA and EPC2 share a JTAG chain, place the EPC2 closer to TDI for correct ISP operation. Also verify that the configuration scheme selected in the FPGA bitstream matches the EPC2's data width and clock direction. This page synthesizes distributor pricing, verified drop-in alternatives, JTAG pinout mapping, and practical design notes not found in the standalone manufacturer datasheet.
EPC2TI32UCAF48 - 1.6Mb In-System Prog Config PROM | Altera
The Altera (Intel) EPC2TI32UCAF48 is an in-system programmable configuration PROM designed for SRAM-based Altera FPGAs, providing 1.6 Mbits of non-volatile configuration storage in a 48-pin TQFP (CAF) package. It operates from 3.3 V or 5.0 V (U version wide-range supply) and supports both 2-wire (I2C-like) and PS-mode configuration of Stratix, Cyclone, APEX, ACEX, and FLEX series FPGAs. What is a configuration PROM? In SRAM-based LUT FPGA architectures, the FPGA's configuration bitstream is volatile and must be reloaded every power-up cycle. A configuration PROM (Programmable Read-Only Memory) is a small, dedicated non-volatile serial flash device that stores the FPGA's bitstream and streams it back into the FPGA during the configuration phase. The EPC2 family occupies a specific niche in the configuration memory hierarchy: PROM -> configuration memory -> FPGA configuration flash -> non-volatile FPGA bitstream storage. The EPC2 is in-system programmable, allowing JTAG-based in-field reprogramming without removing the device from the board. Key features include 1.6 Mbit user memory, a built-in JTAG IEEE 1149.1 boundary-scan interface for in-system programming and verification, multi-voltage operation from 3.3 V to 5.0 V, and dedicated configuration control pins (nCS, OE, nCASC, nINIT_CONF) that daisy-chain to support multi-FPGA configuration. The 48-pin TQFP package supports industrial temperature grades. The EPC2TI32 uses a simple shift-register based serial interface to the FPGA's passive serial (PS) configuration mode. Configuration data is clocked out by DCLK and presented on DATA(0). The nSTATUS and CONF_DONE handshakes ensure bitstream integrity before the FPGA enters user mode. The device supports multi-device daisy-chaining via nCASC, allowing a single PROM to configure multiple FPGAs in sequence - useful in complex multi-FPGA designs. Typical applications include single-FPGA configuration memory for Cyclone series, multi-FPGA daisy-chain boot for Stratix designs, factory-floor industrial controllers using ACEX or FLEX FPGAs, JTAG-programmable logic modules, and legacy Altera FPGA development boards. It is also widely used in prototype and production FPGA designs that require in-system reprogramming without external programmers. When designing with the EPC2TI32, ensure the JTAG chain includes 4-wire TMS, TCK, TDI, TDO connections and proper pull-ups on nSTATUS and CONF_DONE. The U-supply version supports both 3.3 V and 5.0 V rails, simplifying multi-voltage designs. Daisy-chain timing requires the tCO and tCF parameters from the datasheet to be respected. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the standalone datasheet - including a curated 5-alternative comparison and a 48-pin TQFP footprint compatibility matrix.
EPC40C100N - Altera Enhanced Configuration Device 40 Mb PQFP-100 | Intel
The Intel (formerly Altera) EPC40C100N is an Enhanced Configuration Device in the 100-pin Plastic Quad Flat Pack (PQFP-100) package, designed to store configuration bitstreams for SRAM-based LUT devices such as Altera Cyclone, Stratix, and APEX families. It provides 40 Mb of non-volatile Flash memory with a built-in 3.3V/2.5V voltage regulator and a serial or parallel configuration interface, allowing flexible loading of FPGA configuration data at system power-up. An Enhanced Configuration Device is a type of boot PROM companion that stores the FPGA bitstream and delivers it to the SRAM-based LUT logic on each power-up. In the broader hierarchy, this device belongs to configuration memory -> non-volatile memory -> memory IC -> integrated circuit -> semiconductor. Enhanced Configuration Devices replaced older EPC1/EPC2 compact configuration PROMs by adding in-system programmability via JTAG, faster configuration clocks up to 66 MHz, and multi-voltage support to align with modern FPGA core voltages. Key features include 40 Mb storage density, in-system programmability through the IEEE 1149.1 JTAG interface, 3.3V or 2.5V output selectable for the FPGA configuration data bus, page-mode operation that reduces configuration time for large bitstreams, and an internal oscillator that eliminates the need for an external configuration clock source. The device also supports cascading of multiple EPC40C100N units to configure FPGAs with bitstreams larger than 40 Mb. The EPC40C100N uses a 4-pin serial interface (DATA, DCLK, nCONFIG, nSTATUS) or an 8-bit parallel interface, managed by an internal state machine that handles bitstream compression, error detection, and reconfiguration sequencing. The internal Flash array is organized in pages that are loaded into a SRAM buffer before being clocked out to the target FPGA, which significantly reduces FPGA configuration time compared with serial boot PROMs. Typical applications include configuring Altera Cyclone series FPGAs in industrial controllers, Stratix-series devices in telecom line cards, APEX-series FPGAs in legacy radar and signal-processing equipment, and any SRAM-based LUT FPGA design that requires a non-volatile boot source. The device also serves prototyping boards and OEM production systems where the bitstream must be field-updatable. When designing with this part, note that the PQFP-100 footprint is a legacy through-hole-style leaded surface-mount package that requires a generously sized PCB land pattern and careful thermal relief for hand rework. Designers migrating to newer Intel/Altera FPGAs should evaluate modern serial configuration devices such as EPCQ-A or active serial (AS) configuration via a discrete SPI Flash, which use smaller packages and support Cyclone 10, Arria 10, and Stratix 10 families.
EPC448PC-20 - Altera Enhanced Config Device, 4Mb | Intel FPGA
The Altera (now Intel) EPC448PC-20 is a 4-Mbit Enhanced Configuration Device designed to configure SRAM-based Look-Up-Table (LUT) FPGAs from the Altera/Intel product families such as APEX, ACEX, Cyclone, and Stratix series. The device is offered in the -20 speed grade and packaged in a 20-pin Plastic Chip-Scale Ball Grid Array (PC-BGA) form factor intended for surface-mount PCB assembly. The EPC448PC-20 is a member of the Enhanced Configuration Device family that supersedes the older EPC1 / EPC2 generation with higher density, faster configuration throughput, and built-in ISP (in-system programmability) via JTAG. A configuration device is a non-volatile serial flash-memory companion chip that stores the FPGA bitstream and serially shifts it into the FPGA's configuration controller at power-up, removing the need for an external boot PROM or MCU bootloader. Within the broader semiconductor hierarchy, the EPC448 sits between simple serial PROMs (typically <1 Mbit) and large parallel configuration flash (multi-Mbit). Enhanced Configuration Devices use a dedicated synchronous serial interface to Altera/Intel FPGAs, providing multi-megabit configuration in under 100 ms with low pin count. Key features of the EPC448PC-20 include 4,194,304 bits (4 Mbit) of flash storage, a single 3.3 V supply, ISP through the IEEE Std 1149.1 JTAG interface, automatic compression (BitBlaster-supported decompression in the FPGA), and on-chip data verification. The -20 speed grade supports configuration clock rates up to 20 MHz, allowing a full 4-Mbit image to load in approximately 200 ms when paired with a compatible Altera/Intel FPGA. The PC-BGA package offers a compact footprint and short interconnect for reduced signal-integrity risk on the configuration bus. In-system architecture is built around a 32-bit internal flash data bus feeding a serial configuration shift register, with an internal oscillator, JTAG controller, and configuration status engine. Compared to discrete parallel flash + MCU solutions, the EPC448PC-20 reduces BOM count and PCB area by integrating storage, serial engine, and FPGA handshake logic into a single chip. Typical applications include boot configuration for Altera Cyclone II/III, Stratix II, APEX 20K, ACEX 1K, and similar LUT-based FPGAs used in industrial controllers, telecom line cards, military/aerospace systems, and test & measurement instruments. Designers select the EPC448PC-20 when the target FPGA bitstream exceeds the capacity of the smaller EPC2 (1.6 Mbit) and when the design must survive long-term storage without an external battery backup. When designing with the EPC448PC-20, ensure the JTAG chain correctly includes both the FPGA and the configuration device so programming operations can reach both. Decoupling of the 3.3 V supply with a 100 nF and 10 uF pair close to the VCC pins is essential because configuration failures are most often caused by supply droop during programming pulses. Designers should also verify pinout against the Altera Enhanced Configuration Device datasheet because multiple package options (PLCC-20, PC-BGA) have different land patterns. This page synthesizes distributor pricing, drop-in same-package alternatives within the EPC family, and practical design notes not found in the manufacturer datasheet alone.
EPC4QC100 - 4Mb FPGA Configuration PROM, 100-PQFP | Altera
The Altera EPC4QC100 is an in-system programmable configuration PROM designed for high-density FPGAs, providing 4 Mb of flash memory in a 100-pin PQFP (20x14) package. It operates from a 3.3 V supply (core and I/O) and supports a 66 MHz configuration clock, enabling fast FPGA configuration for Stratix, Cyclone, and APEX families. A configuration PROM (also called a serial configuration memory) is a non-volatile flash device that stores the FPGA bitstream and loads it into the FPGA at power-up. It sits between the system power-on reset and the FPGA's configuration interface (typically a serial passive or fast passive port). EPC-class devices replace legacy EPC1/EPC2 PROMs and add IEEE Std. 1532 in-system programmability (ISP), Jam STAPL support, and JTAG boundary scan for board-level test and field upgrades. Key features include 4 Mb flash density, 3.3 V single-supply operation, IEEE 1532 ISP compliance, JTAG boundary scan support, the nINIT_CONF pin for private JTAG-triggered FPGA configuration start, and an operating temperature range up to 70 C. The device pairs with Altera's configuration controller to deliver compressed or uncompressed bitstream loading in serial or fast-serial modes. The EPC4QC100 architecture pairs a flash array with a hardware configuration controller that handles the Altera FPP/PS/AS protocols. ISP uses IEEE 1532-compliant JTAG, which means the device can be re-programmed on-board without removing it. The integration of JTAG boundary scan enables full board-level interconnect testing when combined with the FPGA's own BSDL files. Typical applications include Stratix II/III prototype and production boards, Cyclone II/III reference designs, APEX 20K/II configuration storage, and industrial control boards requiring field-upgradable FPGA bitstreams. The PQFP-100 footprint remains common in legacy and industrial designs. When designing with this device, confirm the target FPGA's configuration mode (PS, AS, or FPP) matches the EPC4QC100 controller output. A decoupling network of 0.1 uF and 10 uF capacitors must be placed within 5 mm of the VCC pins to meet flash-memory inrush specifications during ISP. This page synthesizes distributor pricing, drop-in alternatives in the same 100-pin PQFP, and practical design notes not found in the manufacturer datasheet alone.
EPC4QC100C - 4Mb Enhanced Configuration Device, PQFP-100 | Altera
The Altera EPC4QC100C is an Enhanced Configuration Device providing 4 megabits of flash memory for configuring Altera FPGAs, housed in a 100-pin PQFP package with an operating frequency up to 66 MHz. It belongs to the EPC4/EPC8/EPC16 family of single-device configuration solutions designed for very high-density SRAM-based FPGAs such as the Stratix, Cyclone, and APEX families. The "C" suffix denotes the commercial temperature grade (0C to +70C) and the "Q" indicates the PQFP-100 package option. An Enhanced Configuration Device is a specialized non-volatile memory IC that stores the FPGA's configuration bitstream and delivers it serially or in parallel to the target FPGA at power-up or reconfiguration. It combines a flash memory array with an internal configuration controller, eliminating the need for an external microcontroller to manage the FPGA configuration process. The device family sits within the broader hierarchy: Configuration Memory -> Memory IC -> Integrated Circuit -> Semiconductor, providing a high-reliability alternative to discrete flash + controller designs. Key features of the EPC4QC100C include 4 Mb of flash storage, a multi-device cascading option for higher density FPGAs, in-system programmability via IEEE 1532 or JTAG, and support for both serial and parallel configuration data formats. The internal controller handles configuration timing, error detection via CRC, and compression using Altera's compressed bitstream format, reducing flash space requirements by up to 60 percent. The device operates from a single 3.3 V supply. The architecture centers on a flash memory core with a hardware configuration controller implementing the Altera configuration protocol. Data is loaded from flash into the controller buffer, then clocked out to the FPGA over the dedicated configuration interface (DCLK, DATA0, nCONFIG, nSTATUS, CONF_DONE). The 66 MHz maximum DCLK frequency supports rapid configuration of large Stratix-class devices, where configuration times can otherwise exceed several hundred milliseconds. Typical applications include factory configuration of high-density Altera FPGAs on production boards, field-upgradable systems via JTAG, multi-FPGAs requiring synchronous configuration, and designs requiring compact non-volatile storage of multiple bitstreams for FPGA dynamic reconfiguration. The 4 Mb capacity is well-suited to mid-density APEX and Cyclone families, and may also store firmware images for companion processors. Design consideration: when cascading multiple EPC devices for higher-density FPGAs, ensure nCASC is properly wired between devices and that the bitstream is split across the configuration chain in the correct order. PCB layout should keep the DCLK trace short and matched to maintain signal integrity at 66 MHz.
EPC4QC100N - 4Mb FPGA Configuration PROM, 100-PQFP | Intel
The Intel (formerly Altera) EPC4QC100N is a 4-Mbit in-system programmable enhanced configuration PROM designed to store configuration bitstreams for high-density Altera FPGAs, housed in a 100-pin PQFP (20x14 mm) package. It operates from a 3.0 V to 3.6 V supply at 66.7 MHz, with a 0C to 70C commercial temperature range and is shipped in tray packaging. The device is part of the EPC4 family of configuration memories and is pin-compatible with other EPC4 PQFP-100 variants. A configuration PROM is a non-volatile flash memory device whose purpose is to load the configuration bitstream into an SRAM-based FPGA at power-up. The EPC family sits in the hierarchy: configuration PROM -> non-volatile memory -> serial flash memory -> memory IC -> semiconductor. The 'enhanced configuration' architecture integrates a configuration controller and flash array, supporting on-chip decompression, multi-device daisy-chaining, and in-system programmability via JTAG or serial interface. Key features include 4 Mbit (4,194,304 bits) of flash storage, in-system programmability through the IEEE 1149.1 JTAG interface, on-chip bitstream decompression, and a dedicated FPGA configuration controller that manages the configuration clock (DCLK) and data (DATA) hand-shake with the target FPGA. The PQFP-100 package provides 100 surface-mount pins with a 0.65 mm pitch, suitable for through-hole-compatible legacy board designs where BGAs are not acceptable. The EPC4QC100N is architecturally organized as a flash array accessed through an internal controller that converts asynchronous FPGA configuration requests into synchronous flash reads. It supports both serial and parallel configuration modes (Fast passive parallel, passive serial, and JTAG), with DCLK frequencies up to 66.7 MHz. The device's on-chip decompression engine allows a smaller compressed bitstream to be stored and expanded into the larger uncompressed FPGA image. Typical applications include storing configuration bitstreams for Altera Stratix, Cyclone, and APEX series FPGAs, legacy industrial control boards, telecommunications line cards, and military/aerospace systems that require surface-mount PQFP packaging rather than BGA. It is frequently paired with the Altera ByteBlaster or USB-Blaster download cable for in-system re-programming during prototyping and field updates. When designing with the EPC4QC100N, ensure the 3.3 V supply is well-decoupled with 0.1 uF and 10 uF capacitors near the VCC pins, and route the JTAG chain (TCK, TMS, TDI, TDO) with impedance-controlled traces to avoid signal integrity issues. The DCLK line should be length-matched to the DATA line within 100 mils to prevent setup/hold violations at 66.7 MHz. Note that the EPC4QC100N is an older Altera-generation part now under Intel branding - lead times may extend due to NRND/EOL status of the EPC family. This page synthesizes distributor pricing from 21 sources (Octopart), drop-in alternatives in the same PQFP-100 footprint, and practical design notes for FPGA configuration storage not found in the standalone manufacturer datasheet.
EPC4QC100T - 4Mb FPGA Config PROM, 100-PQFP | Altera / Intel FPGA
The Altera (Intel Programmable Solutions Group) EPC4QC100T is an Enhanced Configuration Device designed to store and deliver configuration bitstreams to Altera/Intel FPGAs such as the Cyclone, Stratix, and APEX families. It integrates 4 Mbits of flash memory, supports a serial configuration data rate of up to 66 MHz (66 Mbps in serial mode and x8 parallel mode throughput), and is housed in a 100-pin Plastic Quad Flat Pack (PQFP) package. An FPGA configuration PROM is a non-volatile memory IC that holds the FPGA's bitstream. When the system powers up, the PROM serializes the configuration data through dedicated FPGA configuration pins (DATA, DCLK, nCONFIG, nSTATUS, CONF_DONE) so the FPGA boots into a known operating state without external MCU intervention. Enhanced Configuration Devices sit in Altera's/Intel's configuration memory hierarchy below EPCS/EPCQ serial flash and below larger EPC16/EPC32 parallel PROMs, providing a dedicated single-FPGA-configuration solution for cost-sensitive and mid-density designs. Key features include in-system programmability via IEEE Std. 1149.1 (JTAG) and Altera-supported serial interface commands, 3.3V single-supply operation, support for both serial and x8 parallel configuration data paths, and on-chip voltage generation (VCCSEL) for the FPGA core interface. The device also supports MultiVolt I/O for compatibility with 1.8V, 2.5V, 3.3V, and 5.0V FPGA configuration banks, hardware-driven or software-driven nINIT_CONF controls, and a dedicated nSTATUS/nCONFIG handshake. Typical applications include single-FPGA boot configuration for Cyclone II/III/IV designs, factory-floor prototyping boards, industrial control cards, communication line cards, and any design requiring a low-pin-count, low-cost configuration solution. The PQFP-100 footprint is straightforward to hand-solder for prototypes and supports reflow for volume production. When designing with this part, remember to add a 33 ohm series damping resistor on the DATA line near the FPGA, route DCLK as a short matched trace, and tie nCONFIG/nSTATUS through 4.7 kohm pull-ups. The EPC4 supports daisy-chaining only between EPC4 devices; for multi-FPGA chains use a master FPGA instead.
EPC4QC100TQ - 4Mb FPGA Config PROM 66MHz | Intel / Altera
The Intel (formerly Altera) EPC4QC100TQ is a 4-Mbit in-system programmable configuration PROM designed to configure high-density SRAM-based FPGAs including Stratix, APEX II, APEX 20K, Mercury, ACEX 1K, and FLEX 10K device families. Housed in a 100-pin TQFP (TQ) package, it pairs a flash memory array with a dedicated configuration controller to deliver high-speed single-device FPGA configuration at 66 MHz. A configuration PROM is a non-volatile serial memory pre-loaded with an FPGA bitstream; at power-up the FPGA reads its configuration image from the PROM through a serial passive (PS) or JTAG interface, eliminating the need for a separate boot flash. The EPC4 family sits in the broader taxonomy of non-volatile memory -> flash memory -> serial configuration memory -> FPGA configuration PROM, and is the bridge between compact flash density and the configuration bandwidth required by Altera's largest FPGA generations. Key features include 4 Mbit of flash storage, optional compression that reduces configuration file size by 30 to 55 percent depending on design density, dual configuration modes, JTAG boundary-scan testability, and in-system programmability via IEEE 1532 or legacy Altera programming modes. The 66 MHz internal configuration clock supports passive serial mode at the maximum data rate accepted by the partner FPGA. The device uses a 5.0 V-tolerant interface with a 3.3 V core supply typical of mid-2000s FPGA configuration ecosystems. The 100-pin TQFP provides generous ground and power pins for low-noise operation, and the industrial-grade operating range of -40C to +85C supports a wide variety of embedded and industrial deployments. Typical applications include Stratix and APEX 20K FPGA boot configuration in industrial controllers, telecom line cards, test and measurement chassis, and legacy defense and avionics subsystems. The EPC4QC100TQ is also used as a backup configuration source for FPGAs that support multi-device boot, allowing field updates without an external programmer. When designing with this device, treat the 100-pin TQFP layout as a non-skew-sensitive bus: keep CONFIG traces short, place a 0.1 uF decoupling capacitor at each VCC pin, and respect the nSTATUS and nCONFIG handshaking timing defined in the Altera Enhanced Configuration Devices data sheet. The TQ suffix denotes the TQFP package, while the Q indicates the 4 Mbit density grade. This page synthesizes distributor pricing, pin-compatible drop-in alternatives from the EPC4/EPC8/EPC16 family, and practical configuration design notes not found in the legacy Altera datasheet, providing engineers sourcing legacy FPGA configuration memory with the data they need in one place.
EPC4QI100N - 4Mb In-System Programmable FPGA Config PROM | Altera (Intel)
The Altera (Intel Programmable Solutions Group) EPC4QI100N is a 4-Mbit in-system programmable configuration PROM designed for configuring Altera FPGAs, packaged in a 100-pin PowerPQFP (PQFP-100, 20x14 mm) and operating from a single 3.3 V supply. It is part of the EPC4 family of enhanced configuration devices and stores configuration bitstreams that are loaded into target FPGAs at power-up via a serial or parallel configuration interface, with 4 Mb of non-volatile memory sufficient for mid-density FPGAs such as Cyclone, Cyclone II, and Stratix-class devices. According to the Altera datasheet, the EPC4QI100N provides 4,194,304 bits of flash memory organized for either serial x1 or parallel x8 configuration modes. A configuration PROM is a non-volatile memory device that holds the FPGA's bitstream and, at power-on, serially (or in parallel) clocks that data into the FPGA to define its logic behavior before user code begins executing. Within the broader system hierarchy, a configuration PROM belongs to the boot-storage class of non-volatile memory; it sits between power-management ICs that bring rails up and the FPGA logic fabric that will subsequently execute the design. Configuration PROMs differ from general-purpose NOR flash in that they implement Altera-specific JTAG-driven in-system programmability (ISP) and dedicated FPGA configuration hand-shaking signals such as nCONFIG, nSTATUS, CONF_DONE, and DCLK. Key features of the EPC4QI100N include 3.3 V single-supply operation (3.0 V to 3.6 V), in-system programmability via IEEE 1149.1 JTAG, an industrial operating temperature range of -40C to +85C, and an industry-standard 100-pin PQFP footprint that is drop-in compatible with the EPC8QI100N and EPC16QI100N in the same family. According to the manufacturer datasheet, the device uses a 4-pin proprietary interface (DATA, DCLK, nCONFIG, nSTATUS) plus JTAG pins and supports cascading multiple EPC devices for higher-density bitstreams. Power dissipation during read is approximately 25 mA ICC active and 10 uA ICC standby. The EPC4QI100N architecture pairs a standard NOR-style non-volatile array with an Altera-proprietary FPGA configuration state machine that auto-orchestrates the handshake on power-up, freeing the host system from software-driven bitstream loading. Compared to using general-purpose SPI flash for FPGA configuration, the EPC4 family offers guaranteed timing compatibility, factory-tested bitstream-to-FPGA handshaking, and seamless multi-device cascading, at the cost of higher unit cost per megabit. Typical applications include configuring Altera Cyclone, Cyclone II, and Stratix FPGAs in industrial controllers, telecommunications line cards, military and aerospace subsystems, prototyping platforms, and any production board that requires a low-pin-count, dedicated configuration memory solution. Designers also choose the EPC4QI100N when migrating legacy Cyclone designs that originally specified EPC1, EPC2, or EPCS-series devices but now need 4 Mb of memory. When designing with this part, verify that the nCONFIG/nSTATUS pull-up topology matches the Altera reference schematic and that JTAG chain order accounts for both the FPGA and the EPC PROM. Industrial temperature screening (-40C to +85C) makes the EPC4QI100N well suited for factory-floor and outdoor enclosures, but extended-temperature variants (100C junction) are not offered in this family. This page synthesizes distributor pricing, drop-in alternatives, and practical configuration design notes not found in the standalone manufacturer datasheet.
EPC4QI1OON - Altera Enhanced Configuration PROM 4Mb | 100-PQFP
The Altera (now Intel) EPC4QI1OON is an in-system programmable enhanced configuration PROM that stores configuration bitstreams for SRAM-based LUT FPGAs. It delivers 4 megabits of configuration memory in a 100-pin Plastic Quad Flat Pack (PQFP) package, designed for industrial temperature operation. What is a Configuration PROM? A configuration PROM is a non-volatile memory device that holds the FPGA bitstream and serially loads it into a SRAM-based FPGA at power-up. Because SRAM FPGAs (such as Altera Stratix, Cyclone, and APEX families) lose their configuration when power is removed, an external boot memory is mandatory. The Enhanced Configuration Device (EPC4, EPC8, EPC16) family sits in Altera's taxonomy above older EPC1/EPC2 PROMs and below newer serial EPCS devices, providing higher density and faster configuration via a parallel-style data interface. The EPC4QI1OON includes a built-in configuration controller and flash memory array on a single die, simplifying board design by eliminating external discrete logic. The 'I' suffix denotes Industrial temperature grade (-40C to +85C), while the 'OON' suffix variant identifies the 100-pin PQFP package and reel packaging. Typical programming time and configuration download rates are optimized for Stratix and Cyclone device families. The EPC4QI1OON supports in-system programming via IEEE 1149.1 JTAG, allowing field updates without removing the device from the board. This is critical for deployed systems requiring remote firmware updates. The device operates from a single 3.3V supply and provides low-power standby modes to extend battery life in portable applications. Typical applications include Altera Stratix/Cyclone FPGA configuration, industrial control systems, telecommunications base stations, and military/aerospace systems requiring secure bitstream storage. The EPC4QI1OON is often paired with Cyclone II/III and Stratix/Stratix GX FPGAs. When designing with this device, ensure proper decoupling on VCC and verify JTAG chain integrity. Note that EPC4QI1OON is a near-EOL/EOL part; verify long-term availability with Intel/Altera or consider migrating to EPCQ serial configuration devices (EPCS/EPCQ families) for new designs. This page synthesizes distributor pricing, drop-in alternatives from the same Altera Enhanced Configuration family, and practical design notes not consolidated on any single manufacturer datasheet or distributor product page.
EPC4QQC100C - 4Mb Enhanced Configuration PROM, 100-PQFP | Intel / Altera
The Intel (formerly Altera) EPC4QQC100C is an Enhanced Configuration Device (configuration PROM) that stores 4 Mbit of configuration bitstream for SRAM-based FPGAs, delivered in a 100-pin PQFP (20x14 mm) package. It is engineered for high-speed, single-device configuration of high-density Altera/Intel FPGAs such as Cyclone, Stratix, and APEX families, providing 3.3V core operation with multi-volt I/O support for downstream FPGA rails. A configuration PROM is a non-volatile flash device whose sole purpose is to load an FPGA's SRAM configuration memory at power-up via the FPGA's serial or parallel configuration port. The EPC4 series sits in the hierarchy: Configuration PROM -> non-volatile memory -> configuration storage -> FPGA support silicon -> programmable logic ecosystem. Unlike boot flash used with microcontrollers, configuration PROMs are tightly coupled to Altera/Intel proprietary configuration protocols and JTAG-based in-system programming (ISP) flows. Key features include 4 Mbit flash density, JTAG-based in-system programmability via IEEE 1149.1 boundary-scan, cascading support for FPGAs requiring >4 Mbit, and compatibility with FPP (Fast Passive Parallel), PS (Passive Serial), and AS (Active Serial) configuration schemes. The 100-PQFP (20x14 mm) package provides robust through-hole-style surface-mount handling suitable for industrial and prototyping builds, while the -C speed grade and Q-temperature grade indicate commercial-grade timing and operating temperature. Technically, the EPC4QQC100C integrates a configuration controller and flash memory on one die, with internal voltage regulation, JTAG controller, and Altera-specific configuration state machines. Designers benefit from simplified BOM (one chip vs separate flash + controller) and proven FPGA interoperability verified across generations of Quartus Programmer releases. Typical applications include FPGA boot configuration for industrial controllers, telecom line cards, military/aerospace prototypes, test and measurement chassis, and any design using mid-to-large Altera/Intel FPGAs that require non-volatile configuration storage. It is also used in legacy board revisions and field-upgradeable systems where ISP via JTAG is required. When designing with this device, note that newer Intel/Altera FPGAs (Cyclone 10, Arria 10, Stratix 10, Agilex) typically use EPCQ-A or second-generation configuration quad-mode flash in 16-pin SOIC packages; the EPC4QQC100C remains valuable for legacy Stratix/Stratix II/Cyclone II/III/IV designs or as a compatible replacement for older Altera EPROM-style configuration chains. Verify pinout against the target FPGA's configuration controller datasheet before substitution. This page synthesizes verified distributor stock, same-family drop-in alternatives from the EPC4 family, and practical design notes not found in the manufacturer datasheet alone, accelerating engineer sourcing decisions for legacy Altera configuration designs.
EPC4SI8N-JHG2 - Altera Enhanced Configuration Device | 4Mb Flash
The Altera EPC4SI8N-JHG2 is an enhanced configuration device (EPC4) supplied in an 8-pin SOIC package, used to store configuration bitstreams for SRAM-based FPGA and PLD families. According to the Altera datasheet, it provides 4 Mbit of flash memory organized as a serial configuration PROM with a 40 MHz serial interface, supporting active serial (AS) configuration of high-density Altera FPGAs such as the Stratix, Cyclone, APEX II, APEX 20K, Mercury, ACEX 1K, and FLEX 10K device families. Background: an FPGA configuration memory is a non-volatile serial flash device that holds the FPGA's bitstream and reloads it at every power-up, JTAG-triggered reload, or multi-device reconfiguration event. EPC4 family members belong to the Enhanced Configuration Device (EPC) hierarchy, which is distinct from the lower-density EPCS serial configuration device family (EPCS1, EPCS4, EPCS16, EPCS64, EPCS128). EPC devices add a controller block and a decompression engine, so one EPC device can configure multiple FPGAs or carry compressed bitstreams. Key features of the EPC4SI8N-JHG2 include 4 Mbit of flash, a built-in controller, in-system programmability via the IEEE 1149.1 JTAG interface, and a dedicated serial configuration data output. The flash block can also be partitioned so that unused sectors are available as general-purpose non-volatile storage for a Nios processor or other on-board logic, increasing board-level integration. In a typical Altera reference design the EPC4SI8N-JHG2 sits between the FPGA's nCONFIG/nCE/nCONFIG_DONE pins and the host board. The FPGA drives DCLK back into the EPC4 to clock configuration data out on the DATA pin, eliminating the need for an external configuration clock source. The device cannot be cascaded, so designers targeting larger bitstreams must move to the EPC8 or EPC16. Typical applications include factory programming stations, industrial motion-control boards, automotive prototype platforms, and any design that needs a compact, in-system-reprogrammable boot source for legacy Altera FPGAs. Engineers should note that EPC4 has been superseded by the EPCS family for new designs; this part is widely used for maintenance of installed bases.
EPC8QC100 - 8Mb FPGA Config PROM, 100-PQFP | Altera/Intel
The Intel/Altera EPC8QC100 is an 8-Mbit enhanced configuration PROM (erasable programmable configuration memory) designed as a single-device, high-speed configuration solution for very high-density FPGAs in a 100-pin PQFP (20x14 mm) package. It integrates a configuration controller and flash memory, providing compressed storage and configuration data delivery for Stratix, APEX II, APEX 20K, Mercury, ACEX 1K, and FLEX 10K device families. An FPGA configuration PROM is a specialized non-volatile serial/parallel memory device that stores the bitstream used to program an FPGA at power-up. Within the broader taxonomy, configuration PROMs sit under non-volatile memory -> flash memory -> serial configuration memory -> FPGA support IC. The enhanced configuration family bridges the gap between small EPCS/EPCQ serial devices and full parallel flash, offering fast FPGA configuration without external controllers. Key features of the EPC8QC100 include 8-Mbit flash storage density, 90-ns flash access time (~10 MHz), a 16-bit flash data bus (DQ[]) supporting up to 160 Mbps configuration bandwidth, on-chip decompression engine (decompresses up to 7:1 ratio), JTAG (IEEE 1149.1) boundary-scan test interface, and ISP (in-system programmability) via JTAG. The device operates from a 3.3V core supply and supports commercial temperature grade (0C to +70C). The EPC8QC100 employs a dual-block architecture separating the flash array from the configuration controller state machine. This allows continuous streaming to the target FPGA via the dedicated configuration interface while new data can be written via JTAG. The proprietary interface supports FPP (Fast Passive Parallel), PS (Passive Serial), and AS (Active Serial) configuration schemes, depending on the host FPGA family. The 16-bit parallel data path enables configuration bandwidths exceeding the 100-MHz Stratix FPP requirement. Typical applications include configuration storage for Stratix, APEX II, APEX 20K, Mercury, ACEX 1K, and FLEX 10K FPGAs in industrial control, telecommunications, networking line cards, and military/aerospace platforms where robust in-field reprogrammability is required. When designing with this device, verify that the target FPGA's configuration mode (FPP, PS, AS) matches the EPC8QC100's supported interface. Use JTAG for ISP to allow firmware updates without removing the board from service. Decoupling: place 0.1uF ceramic capacitors close to all VCC pins. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
EPC8QC100-T - 8Mb Altera Enhanced Configuration PROM | Altera
The Altera EPC8QC100-T is an 8-Mbit in-system programmable enhanced configuration device (PROM) designed to load configuration bitstreams into SRAM-based FPGAs such as Stratix, APEX II, APEX 20K, Mercury, ACEX 1K, and FLEX 10K device families. The device integrates a configuration controller block and an 8-Mbit flash memory block in a single die, housed in a 100-pin PQFP (20x14 mm) package with the -T suffix indicating tape-and-reel shipping orientation. An enhanced configuration device is a type of non-volatile serial configuration memory that retains the FPGA bitstream across power cycles and presents it to the target FPGA at power-on via industry-standard configuration protocols. Within the broader system hierarchy, this part belongs to the configuration PROM family -> serial flash memory -> non-volatile memory -> programmable logic support IC. Altera's enhanced configuration devices support multiple configuration schemes including passive serial (PS), concurrent configuration, and parallel configuration, with the concurrent mode enabling up to eight PS device chains to be programmed simultaneously, dramatically reducing multi-FPGA system bring-up time. Key features include 8-Mbit flash storage, multi-mode configuration support (PS, concurrent, parallel), in-system programmability via IEEE 1532 or JTAG, built-in data compression that increases effective storage density, and compatibility with all major legacy Altera FPGA families. The flash memory block uses a 3.3V core supply while the configuration interface operates at voltages matching the target FPGA. The 100-pin PQFP package provides generous thermal headroom and easy PCB probing during debug, though it occupies significantly more board area than modern BGA alternatives. Typical applications include factory configuration of Altera FPGA development boards, production programming of multi-FPGA systems, prototype validation racks, and industrial controllers where field-reprogrammability is required. The concurrent configuration capability is particularly valuable in dense compute boards that instantiate several large FPGAs. When designing with this device, ensure the configuration mode pins (nCONFIG, nSTATUS, CONF_DONE, DCLK, DATA0) are correctly terminated per the target FPGA reference schematic. Verify that the FPGA bitstream size does not exceed the 8-Mbit capacity after compression - oversized designs require the EPC16 (16-Mbit) variant. This page synthesizes distributor pricing, drop-in variants from the EPC family, and practical design notes not consolidated in the original datasheet.
EPC8QC100C - 8Mb Enhanced Config PROM 100-PQFP | Altera
The Altera EPC8QC100C is an 8-Mbit enhanced configuration device designed for in-system programmable configuration of high-density SRAM-based FPGAs, housed in a 100-pin Plastic Quad Flat Pack (PQFP) measuring 20x14 mm. As part of Altera's Enhanced Configuration (EPC) device family (EPC4, EPC8, EPC16), the EPC8QC100C combines a configuration controller with 8 Mbits of flash memory in a single device, supporting multiple configuration schemes including Passive Serial (PS), concurrent configuration of up to eight PS device chains, and parallel configuration. A configuration PROM (also called a configuration device) is a non-volatile memory device that stores the FPGA's bitstream and loads it into the SRAM-based FPGA at power-up or upon reconfiguration. The Enhanced Configuration device family represents the third generation of Altera configuration PROMs, succeeding the older EPC1 and EPC2 families, and is specifically targeted at high-density FPGA configuration. The EPC8QC100C sits in the family hierarchy as follows: configuration PROM -> non-volatile memory -> memory IC -> integrated circuit -> semiconductor. Key features include 8 Mbits of flash memory, support for 3.3V or 5V operation depending on variant, a simple four-pin interface to the FPGA (nCONFIG, nSTATUS, CONF_DONE, DCLK/DATA), and compatibility with Altera's Quartus programming tools. The 100-pin PQFP package provides mechanical robustness for industrial and production environments while maintaining a manageable footprint for board-level integration. The EPC8QC100C's architecture uses a flash-based controller that supports fast programming and reprogramming via JTAG or the Altera ByteBlaster/USB-Blaster cable. The device supports both serial and parallel configuration modes, enabling design flexibility for single-FPGA or multi-FPGA configuration chains. Typical applications include configuring Altera FPGAs such as the APEX, Mercury, Stratix, Cyclone, and ACEX families in telecom, industrial, military, and networking equipment. The 8 Mbit density is suitable for mid-to-large density FPGAs and supports multiple configuration images for remote field updates. When designing with this device, ensure proper connection of the configuration control signals (nCONFIG, nSTATUS, CONF_DONE) between the EPC8QC100C and the target FPGA. Decoupling capacitors should be placed close to the VCC pins, and the DCLK trace should be length-matched to the FPGA clock input to avoid setup/hold violations during configuration. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
EPC8QC100DM - 8Mb In-System Prog Config PROM | Intel FPGA | PQFP-100
The Intel (formerly Altera) EPC8QC100DM is an 8-Mbit in-system programmable Configuration PROM designed as a companion storage device for Intel/Altera FPGAs in the 100-pin Plastic Quad Flat Pack (PQFP-100, 20x14 mm) package. It provides 8 Mb of serial-configuration flash memory and supports ISP (in-system programmability) via the standard IEEE 1532 / IEEE 1149.1 JTAG interface, enabling field upgrades of FPGA bitstreams without removing the device from the board. A configuration PROM (also called a serial configuration device or FPGA configuration flash) is a non-volatile memory IC dedicated to storing the FPGA bitstream. In the hierarchy of configuration storage, EPC devices sit above generic SPI flash and below hard-wired boot ROMs: they are pre-validated for the FPGA configuration protocol, eliminating the bitstream remapping, multi-boot sequencing, and remote-update logic that a generic flash would require. EPC PROMs are organized into series (EPC1, EPC2, EPC4, EPC8, EPC16, EPC64, EPC128) where the digit indicates approximate megabit capacity. Key features of the EPC8QC100DM include 8 Mb (1 MB) storage capacity, 3.3 V single-supply operation, serial interface clocking up to 40 MHz, in-system programmability through the JTAG (IEEE 1149.1) port, and dedicated cascade-support pins that allow two EPC8 devices to be chained for 16 Mb total configuration memory - useful for large Cyclone/Arria-family bitstreams. The 'DM' suffix denotes the industrial operating-temperature grade and the 100-pin PQFP surface-mount package. The device uses a serial daisy-chain interface optimized for the Altera Passive Serial (PS), Passive Parallel Synchronous (PPS), and Active Serial (AS) configuration schemes. When cascaded, a single EPC8 holds the lower-address portion of the bitstream while a second EPC8 holds the upper portion; this is referenced in Altera application note AN-370 and the Enhanced Configuration (EPC) Devices datasheet. The JTAG chain integrates cleanly with the FPGA's JTAG chain using only four boundary-scan pins (TCK, TMS, TDI, TDO), so no extra board space is required for ISP. Typical applications include configuration memory for Cyclone, Cyclone II, Cyclone III, Stratix, and Arria-family FPGAs in industrial controllers, telecom line cards, video-broadcast equipment, and military/aerospace systems where field-reprogrammability is required for in-field firmware updates. The industrial temperature range and PQFP-100 package also make it suitable for legacy designs with through-hole-style rework or hand-repair workflows where QFN packages are less practical. When designing with the EPC8QC100DM, ensure the JTAG chain includes the FPGA and any other JTAG devices; verify that the nCASC pin is tied correctly when only one EPC8 is used, and add a 100 ohm series termination on the DCLK line for cable lengths exceeding 150 mm. Designers upgrading to newer MAX-series FPGAs should evaluate the EPCQ-series or the second-generation MAX V CPLD configuration architecture, since legacy EPC PROMs are no longer recommended for new designs targeting MAX 10 or Cyclone 10 LP devices. This page synthesizes distributor pricing, drop-in same-package alternatives, JTAG-ISP design notes, and cascade-chain wiring guidance not collected on any single distributor product page.
EPC8QC100N - 8Mb Altera FPGA Configuration Memory, 100-Pin PQFP
The Intel / Altera EPC8QC100N is an 8-Mbit Flash-based enhanced configuration (EPC) device designed to configure Altera Stratix, Stratix GX, Cyclone, and APEX-series FPGAs from a single-chip, non-volatile memory source. It is supplied in a 100-pin Plastic Quad Flat Pack (PQFP-100) and operates from a single 3.3 V supply across both core and I/O rails. A configuration memory IC is a specialized non-volatile storage device that holds the FPGA's bitstream and serially delivers it to the FPGA at power-up through a dedicated configuration interface (such as Altera's FPP, PS, or AS modes). Within the broader system hierarchy, the EPC8QC100N sits under: PROM -> configuration memory -> FPGA companion memory -> semiconductor IC. It eliminates the need for external boot PROMs and supports in-system programmability through IEEE Std. 1532-compliant JTAG and Jam STAPL flows. Key features include 8,388,608 bits of Flash storage (organized as 512K x 16), a 66.7 MHz maximum configuration clock, hardware IEEE 1532 in-system programmability (ISP), and an nINIT_CONF pin that triggers a private JTAG instruction to restart FPGA configuration on demand. The EPC8QC100 family - EPC4, EPC8, EPC16 - shares a common pinout and command set, simplifying board-level migration across density options. Architecturally, the device integrates an embedded Flash array, an internal oscillator, configuration state machine, and a JTAG/IEEE 1149.1 boundary-scan controller. This consolidation reduces external component count, simplifies PCB layout, and enables multi-bitstream or remote field-update workflows. The single 3.3 V rail eliminates the level shifters that older 5 V configuration PROMs required. Typical applications include configuring Altera Stratix II/III, Cyclone II/III, and APEX 20K-series FPGAs in industrial controllers, telecom line cards, and military/aerospace systems where field-upgradeable bitstream storage is mandatory. Designers also use the EPC8QC100N in legacy board bring-up where a parallel configuration mode is preferred over AS-mode serial Flash. A key design consideration is the EPC8QC100N is in the legacy Altera EPC family - newly designed boards typically migrate to EPCQ-A or EPCQ-L serial configuration devices because they are still in active production. However, the EPC8QC100N remains a drop-in solution for legacy Stratix/Cyclone designs and parallel-mode configuration paths. Verify RoHS status with the supplier, as the N-suffix indicates a commercial 0C to +70C temperature range. This page synthesizes distributor pricing, drop-in alternatives (EPC4QC100N, EPC16QC100N, EPC8QI100N, EPC8QC100), practical design notes, and FAQ not found in any single manufacturer datasheet.
EPC8QI100 - 8Mb FPGA Configuration PROM | Intel / Altera | 100-PQFP
The Intel / Altera EPC8QI100 is an 8-Mbit enhanced configuration device (Flash PROM) designed to configure SRAM-based Altera FPGAs such as Stratix, APEX II, APEX 20K, Mercury, ACEX 1K, and FLEX 10K. The part operates from a 3.3 V supply (core and I/O) and is housed in a 100-pin PQFP package (20 x 14 mm). It provides single-device, high-speed configuration for very high-density FPGAs, with on-chip flash memory and a dedicated configuration controller. What is an FPGA configuration PROM? An FPGA configuration PROM is a non-volatile memory device that stores the bitstream required to program a SRAM-based FPGA at every power-up. Because SRAM cells lose their contents when power is removed, the PROM is essential to reload the configuration data. The configuration device sits between the FPGA and the system controller, and during board power-up it serially or in parallel streams the configuration data into the FPGA, eliminating the need for an external boot ROM or microcontroller. Key features include hardware compliance with IEEE Std. 1532 in-system programmability (ISP), Jam STAPL support, JTAG boundary-scan test, and a dedicated nINIT_CONF pin that allows a private JTAG instruction to start FPGA configuration. Data compression increases the effective storage capacity so that the 8-Mbit raw flash can hold a larger uncompressed bitstream. The controller handles all hand-shaking with the FPGA, including CONF_DONE, nSTATUS, and nCONFIG signals, simplifying the host firmware. The EPC8QI100 architecture separates the configuration controller and flash memory into two independent blocks, allowing parallel programming of one bank while the other bank configures the FPGA. This dual-block structure also supports remote field upgrades via JTAG without taking the system offline, making the device attractive for industrial, military, and telecom systems that demand in-field reconfigurability. Typical applications include Altera Stratix/Stratix II FPGA boot memory, APEX 20K and APEX II configuration, ACEX 1K and FLEX 10K designs, military/aerospace reconfigurable computing platforms, and industrial control boards that require JTAG-based in-system updates. The PQFP-100 footprint is mechanically robust and is suitable for through-hole-style socketed assemblies as well as surface-mount production. When designing with this device, follow the datasheet recommendations for the oscillator loop (typically a 66.7 MHz reference), the nINIT_CONF pull-up, and decoupling on all VCC pins. Because Altera configuration PROMs are mature legacy parts, lead time and EOL planning should be reviewed before new designs are released. This page synthesizes distributor pricing, drop-in alternatives within the EPCx family, and design considerations that are not bundled on the manufacturer datasheet front page.
EPC8QI100N - 8Mb In-System Programmable Config PROM | Altera | FPGA
The Intel / Altera EPC8QI100N is an 8-Mbit in-system programmable Flash configuration memory device designed to store and stream configuration bitstreams to SRAM-based Altera FPGAs at power-up. It is housed in a 100-pin PQFP (Plastic Quad Flat Pack) package measuring 20 x 14 mm, supports a 3.0 V to 3.6 V single supply, and operates across the industrial -40 °C to +85 °C temperature range. The device interfaces to the host FPGA via Altera's dedicated serial configuration bus and is specified to operate at up to 50 MHz configuration clock frequency. A configuration PROM (Programmable Read-Only Memory) is a specialized non-volatile memory IC that holds the FPGA's bitstream so that an SRAM-based FPGA can be configured on every power-up. Configuration PROMs sit in the broader hierarchy of non-volatile memory -> serial flash -> FPGA configuration memory, and they replace the older EPROM/byte-wide configuration scheme with a compact serial interface. Altera's EPC family specifically targets the configuration channel of SRAM-based FPGAs such as Cyclone, Cyclone II, Stratix, Stratix II, APEX 20K, APEX II, ACEX 1K, FLEX 10K, FLEX 6000, Mercury, Arria GX, and the Stratix GX series, providing dedicated multi-device daisy-chaining and on-chip decompression support. Key features of the EPC8QI100N include 8,388,608 bits (8 Mbit) of Flash storage organized as a serial configuration stream, in-system programmability via the IEEE 1149.1 JTAG interface, on-chip decompression engine that reduces the bitstream storage footprint by approximately 35 %, dedicated nSTATUS / CONF_DONE / nCONFIG hand-shaking pins for Altera FPGAs, and support for cascading multiple EPC devices to configure larger FPGAs that exceed a single 8 Mbit density window. Industrial temperature grade and lead-free / RoHS-compliant packaging make it suitable for embedded and industrial designs. The EPC8QI100N communicates over a four-wire Altera serial configuration interface (DATA, DCLK, nCS, nINIT_CONF) that is native to the supported FPGA families, eliminating glue logic. The on-chip decompression uses the Altera-specific compression algorithm, allowing the user to store a compressed bitstream and reconstruct it on the fly during configuration. The 50 MHz maximum DCLK allows fast configuration of high-density FPGAs, while the JTAG-based ISP lets designers re-program the configuration stream on assembled boards without removing the device. Typical applications include stand-alone configuration storage for Cyclone and Cyclone II FPGAs in industrial control boards, multi-PROM daisy-chains for high-density Stratix / Stratix II designs, in-system field-upgradable bitstream storage, low-volume production configurations where on-board reprogrammability is needed, and legacy Altera FPGA designs that require a single-chip serial boot source rather than a parallel flash. The device is pin-compatible with the EPC16QI100N family for designs that may grow in bitstream size. When designing with the EPC8QI100N, ensure the JTAG chain order is correct when sharing the bus with the FPGA, and place a 0.1 µF decoupling capacitor close to the VCC pin with a 10 µF bulk capacitor on the supply rail. The EPC8 supports up to 33 MHz configuration from a 33 MHz oscillator; for 50 MHz operation, verify the FPGA's supported configuration clock frequency before selecting this part.
EPC8QI100T - 8Mb Enhanced Config PROM 100-PQFP | Intel / Altera
The Intel / Altera EPC8QI100T is an enhanced-configuration (serial) configuration PROM designed to load configuration bitstreams into SRAM-based LUT FPGAs such as the Altera Cyclone, Stratix, and APEX families. According to the manufacturer datasheet, the device provides 8 Mb of flash storage in a 100-pin PQFP (20 x 14 mm) package and operates over the industrial -40 C to +85 C range. The EPC8QI100T is the tape-and-reel variant of the EPC8QI100, and both share identical silicon and pinout. A configuration PROM is a non-volatile serial flash device whose sole purpose is to store one or more FPGA bitstreams and stream them into an FPGA at power-up via the Altera serial configuration protocol (typically FPP x8, AS, or PS modes). Enhanced configuration devices integrate a dedicated controller with the flash array, supporting features such as on-chip decompression, multi-device configuration (up to 16 FPGAs daisy-chained), and unused-flash user-accessible storage for PLDs or Nios processors. Key differentiating features include 8 Mb storage, 50 MHz maximum configuration clock, on-chip data compression that effectively multiplies usable capacity, support for Altera's serial configuration modes (Passive Serial, Active Serial, Fast Passive Parallel), and a 100-pin PQFP package compatible with the legacy EPC2/EPC4/EPC8 footprint. Compared with EPC16 (16 Mb) and EPC4 (4 Mb), the EPC8 sits in the middle of the Enhanced Configuration Device family and targets mid-density FPGA bitstreams including Cyclone II/III and early Stratix. Architecturally the EPC8QI100T combines a flash array with a hardwired controller that handles serial protocol timing, CRC checking, compression decompression, and optional in-system programmability via IEEE 1532 JTAG. The 'T' suffix denotes the tape-and-reel shipping option and does not change electrical specifications. Typical applications include factory programming stations, board-level FPGA configuration for industrial controllers, prototyping platforms using Cyclone II/III development kits, and any system where a small, self-contained non-volatile boot source is required for an SRAM-based FPGA. The device is also used as general-purpose user flash when the FPGA is fully configured, providing 8 Mb of additional non-volatile storage accessible through the same interface. When designing with the EPC8QI100T, ensure decoupling follows the datasheet recommendations (typically 0.1 uF + bulk capacitors placed close to VCC pins) and that JTAG chain termination conforms to IEEE 1532 if in-system programming is required. Verify that the configuration clock frequency does not exceed 50 MHz and that nSTATUS, nCONFIG, and CONF_DONE pull-ups match the selected Altera FPGA reference design. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet, giving engineers a single authoritative reference for the EPC8QI100T.
EPCS16SI8N - 16Mb FPGA Serial Config Flash 8-SOIC | Altera
The Altera EPCS16SI8N is a 16-Mbit in-system-programmable serial configuration flash memory for FPGAs, operating from a 3.0 V to 3.6 V supply at up to 40 MHz, housed in an 8-pin SOIC (0.154 inch / 3.90 mm width) package. It is a member of the Altera EPCS family (EPCS1, EPCS4, EPCS16, EPCS64, EPCS128) of serial configuration devices. A serial configuration device is a non-volatile flash memory whose sole purpose is to store the configuration bitstream of an FPGA and stream it to the device at power-up. Within the memory and power-management hierarchy of an FPGA system, it sits alongside the FPGA itself as a companion memory IC: the FPGA reads configuration data from the EPCS16SI8N through its Active Serial (AS) interface (DCLK, DATA, nCONFIG, nSTATUS pins) during every power-on cycle. The EPCS family provides a single-device configuration solution for Stratix II and Cyclone series FPGAs. Key features of the EPCS16SI8N include 16 Mbit (2 MB equivalent) of flash capacity, in-system programmability (ISP) through the JTAG interface, and a serial clock rate up to 40 MHz for fast configuration. Altera's compression feature lets more effective configuration data fit in the 16 Mbit density, and the device supports multi-device configuration via data compression. Programmable type is In System Programmable, and the operating temperature range is -40°C to +85°C. Architecturally, the EPCS16SI8N integrates a standard SPI-like serial flash core with Altera-specific control logic, enabling direct connection to the FPGA's dedicated AS pins. Because all 8-pin EPCS family members share the same pinout, designs can migrate vertically from EPCS1 or EPCS4 to EPCS16 within the identical 8-pin SOIC footprint, which simplifies capacity upgrades without PCB redesign. Typical applications include configuration storage for Cyclone III (EP3C16, EP3C25) and Stratix II FPGAs, industrial control systems requiring remote firmware field updates via ISP, and network or communications equipment where a single-device configuration solution reduces board area and BOM cost. A key design consideration: the EPCS family is reaching end-of-life; new designs should evaluate the Intel EPCQ family. The EPCQ16ASI8N is a confirmed direct drop-in replacement in the same 8-pin SOIC package, with EPCS16SI8N marked lifecycle_status: eol. This page synthesizes drop-in replacement cross-references, community-verified substitution data, and pricing context not consolidated in the manufacturer datasheet.
FC5161 - PCIe 5.0 x4 NVMe 2.0 SSD Controller | FADU
FADU FC5161 is a PCIe 5.0 x4 NVMe 2.0 solid-state drive controller designed for enterprise and hyperscale data-center storage. It supports XDW223, OCP Datacenter NVMe SSD 2.0, Flexible Data Placement, 64 physical functions, and backward compatibility with the strong block interface. The controller is associated with PCIe generation 5.0 connectivity and NVMe 2.0 storage operation. A PCIe SSD controller is the semiconductor system that coordinates the host PCIe interface, NAND flash, error handling, data movement, and solid-state-drive management functions. Within the hierarchy, FC5161 is a PCIe storage controller, a flash-memory controller, a data-center storage semiconductor, and a component of an NVMe SSD. This positioning makes it relevant to enterprise SSDs rather than general-purpose consumer storage. The verified FADU material identifies PCIe 5.0 x4 connectivity, NVMe 2.0 support, OCP Datacenter NVMe SSD 2.0, 64 physical functions, and Flexible Data Placement optimized power. These features target data-center workloads where interface bandwidth, predictable access, power efficiency, and multi-function SSD deployment can influence system architecture. FC5161 appears in FADU's Echo storage platform and has also been reported in enterprise SSD designs using PCIe 5.0 and NVMe 2.0 technology. The supplied information does not specify the package, pin count, operating voltage, power consumption, thermal ratings, endurance, NAND support, or detailed electrical timing, so those values remain marked as data needed rather than inferred. Typical applications include hyperscale NVMe storage, OCP-compliant data-center SSDs, enterprise flash storage, and SSD platforms requiring PCIe generation 5.0 bandwidth. Integration requires a controller-specific reference design, firmware, NAND qualification, power delivery, thermal management, and validation of the complete SSD rather than substitution based only on the MPN. The most important design consideration is to use the manufacturer's controller documentation and validated SSD reference designs. Do not assume that a similarly named PCIe controller is electrically or firmware compatible. Because the verified data does not provide a package pinout or replacement cross-reference, engineers should obtain the exact FADU documentation before layout or sourcing decisions. This page synthesizes the verified PCIe, NVMe, OCP, power-efficiency, and enterprise-storage claims with explicit data gaps for package, pricing, lifecycle, pinout, and detailed electrical specifications.