EPC2L20N - 1.6Mb Altera FPGA Config PROM | PLCC-20
MPN： EPC2L20N ✗ 停產EPC2L20N 概覽
What is a configuration PROM? A configuration PROM is a non-volatile serial memory that stores the FPGA's configuration bitstream and serially shifts it into the FPGA during power-up or reconfiguration. It sits between the system flash and the FPGA in the boot hierarchy: microprocessor -> flash -> configuration PROM -> SRAM-based FPGA. By isolating the bitstream from system flash, the PROM lets engineers update FPGA firmware in-system without recompiling the host firmware.
The EPC2L20N uses an in-system-programmable (ISP) interface so the bitstream can be reloaded through JTAG-style four-wire programming without removing the device from the board. Cascading of multiple PROMs is supported via the chip-enable control to handle configuration images larger than 1.6 Mb, which historically let designers support Cyclone II and APEX 20K designs. Internal oscillator and clock-management circuitry generate the serial configuration clock for the target FPGA.
The PLCC-20 (J-lead) package is through-hole-compatible and socket-compatible, allowing easy field replacement and prototype iteration. Operating temperature spans the commercial 0C to +70C range as the standard grade, with industrial-grade variants available for harsher environments.
Typical applications include Altera FPGA configuration bitstream storage for industrial control boards, telecom line cards, prototyping platforms, and embedded compute modules where the SRAM-based LUT FPGA must be reconfigured at power-up.
When designing with this device, observe Altera's configuration interface timing requirements and verify the cascaded PROM chain supports the total bitstream length for the chosen FPGA family. For new designs, designers should evaluate newer serial configuration devices, as the EPC2 family has been in mature production for many years.
This page synthesizes Altera/Intel configuration-device specifications, distributor availability and pricing, drop-in alternatives, and engineering notes not consolidated in any single manufacturer document.
直接替換替代品，適用於 EPC2L20N — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： EPC2L20N （相同外形與佔位） — 差異在於 Mounting Type, Package, Memory Type, Supported FPGA Families, RoHS Status.
EPC2LI20N
✅ 直接替換聯絡詢價
查看資料表 →EPC2LC20N
✅ 直接替換✗ 缺貨
$7.4 / 單位
查看資料表 →EPC2L120N
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →EPC2L20N 最大額定值與電氣特性
| 功能 | In-System Programmable Configuration PROM for SRAM-based LUT FPGAs |
| 記憶體容量 | 1.6 Mbit |
| Programmable Type | In System Programmable (ISP) |
| Supply Voltage - VCCINT/VCCIO | 3.0 V to 3.6 V or 4.5 V to 5.5 V |
| 封裝 / 外殼 | 20-LCC (J-Lead), PLCC-20 |
| Packaging | Tube |
| 工作溫度 | 0C to +70C (commercial) |
| Supported FPGA Families | Altera APEX, ACEX, Cyclone, FLEX 10K, Mercury (per datasheet) |
| Configuration Interface | Serial (Altera FPP / PS configuration scheme) |
| Cascade Support | Yes (multi-PROM chain via CE control) |
| Programming Method | In-system via 4-wire ISP / JTAG-style |
| 安裝類型 | Surface Mount (J-Lead PLCC) |
| 腳位數 | 20 |
| Lead Finish | Matte Tin (Pb-free) |
| MSL 等級 | 3 (168 hours) |
| RoHS 狀態 | Compliant |
EPC2L20N 20-lcc (j-lead), plcc-20 腳位配置指南
EPC2L20N（20-lcc (j-lead), plcc-20 封裝）的腳位配置。 此數位 IC 包含 GPIO、通訊介面（UART、SPI、I2C）與電源腳位。替代腳位功能與配置選項請參閱製造商資料表。對嵌入式系統設計與 PCB 佈局至關重要。
無詳細腳位定義資料： EPC2L20N.
請參閱 資料表 以查看完整腳位配置。
典型應用
EPC2L20N 適用於 6 應用s: Altera APEX 20K FPGA Configuration Storage, Altera Cyclone FPGA Bitstream Loading, Industrial Control Board Firmware Storage, Telecom Line Card FPGA Configuration, FPGA Prototyping and Development Boards, Legacy Avionics and Defense Systems.
Altera APEX 20K FPGA Configuration Storage
The EPC2L20N is purpose-built for storing the configuration bitstream of Altera APEX 20K series SRAM-based LUT FPGAs. With 1.6 Mbit of non-volatile storage per the Altera datasheet, it covers APEX 20K100 and 20K200 bitstreams when used standalone, and can be cascaded for larger 20K400/600/1000 images via the nCE chip-enable chain. The 3.0 V to 3.6 V / 4.5 V to 5.5 V dual-voltage operation lets it drive APEX configuration pins directly without external level shifters. PLCC-20 J-lead sockets simplify prototyping and field replacement.
推薦
Altera Cyclone FPGA Bitstream Loading
Original-generation Altera Cyclone (EP1C3, EP1C6, EP1C12, EP1C20) FPGAs used the EPC2 family of configuration PROMs to load bitstream at power-up. The EPC2L20N's 1.6 Mbit matches the smaller Cyclone devices, while larger Cyclones can be served via cascaded EPC2 chains. Engineers migrating legacy Cyclone designs can drop in the EPC2L20N on existing PCBs that follow the Altera PS (passive serial) configuration scheme. ISP via four-wire programming enables field firmware updates without removing the PROM.
推薦
Industrial Control Board Firmware Storage
Industrial control boards running legacy Altera FPGA logic (PLCs, motor controllers, machine vision front-ends) frequently use the EPC2L20N to store the FPGA firmware bitstream independent of system flash. The PLCC-20 J-lead package supports socketed mounting for easy field replacement during maintenance cycles. Operating at 3.3 V or 5 V, the EPC2L20N interfaces directly to Altera FPGAs on industrial 5 V backplanes. The in-system programmable interface lets technicians update bitstream revisions through JTAG.
推薦
Telecom Line Card FPGA Configuration
Telecom infrastructure equipment (line cards, multiplexer shelves) built around Altera FLEX 10K and APEX 20K FPGAs relied on EPC2 PROMs for FPGA configuration. The EPC2L20N supports these designs with 1.6 Mbit storage in a socketable PLCC-20 J-lead package for serviceability. The dual-voltage (3.3 V/5 V) operation matches telecom backplane rails. Multiple PROMs can cascade via nCE to handle line-card bitstreams exceeding 1.6 Mb.
推薦
FPGA Prototyping and Development Boards
FPGA development boards targeting Altera APEX, ACEX, Cyclone, FLEX 10K, and Mercury devices historically used the EPC2L20N for quick prototype bring-up. The PLCC-20 socketable package lets developers swap bitstreams rapidly during bring-up, and ISP allows direct in-circuit programming. The 1.6 Mbit capacity covers most early-generation Altera FPGA bitstreams. Modern development kits have transitioned to EPCQ/EPCQL SOIC-8 PROMs, but legacy boards still benefit from the EPC2L20N.
推薦
Legacy Avionics and Defense Systems
Long-life defense and avionics platforms designed around Altera APEX 20K or FLEX 10K FPGAs continue to require EPC2 configuration PROMs through multi-decade support programs. The EPC2L20N, with its mature Altera pedigree and PLCC-20 socketable form factor, supports the obsolescence-management strategy of these programs. Industrial-temperature variants (EPC2LI20N) extend operating range for harsher environments.
推薦
推薦產品摘要
工程參考資料，適用於 EPC2L20N — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | EPC2LI20N | EPC2LC20N | EPC2L120N | EPC2L20 | EPC2C20 |
|---|---|---|---|---|---|---|
| Brand | Altera / Intel | Altera / Intel | Altera / Intel | Altera / Intel | Altera / Intel | Altera / Intel |
| Package | PLCC-20 (J-Lead) | PLCC-20 (J-Lead) - same | PLCC-20 (J-Lead) - same | PLCC-20 (J-Lead) - same | PLCC-20 (J-Lead) - same | PLCC-20 (J-Lead) - same |
| Memory Size | 1.6 Mbit | 1.6 Mbit | 1.6 Mbit | 1.6 Mbit (variant label) | 1.6 Mbit | 1.6 Mbit (EPC2 family) |
| Supply Voltage | 3.0-3.6 V / 4.5-5.5 V | 3.0-3.6 V / 4.5-5.5 V | 3.0-3.6 V / 4.5-5.5 V | 3.0-3.6 V / 4.5-5.5 V | 3.0-3.6 V / 4.5-5.5 V | 3.0-3.6 V / 4.5-5.5 V |
| Programmable Type | In-System Programmable (ISP) | ISP | ISP | ISP | ISP | ISP |
| Function | FPGA Configuration PROM | FPGA Configuration PROM | FPGA Configuration PROM | FPGA Configuration PROM | FPGA Configuration PROM | FPGA Configuration PROM |
| Lifecycle Status | NRND | NRND | NRND | NRND | NRND | NRND |
| Operating Temperature | 0C to +70C (commercial) | Industrial grade variant | 0C to +70C (commercial) | 0C to +70C (commercial) | 0C to +70C (commercial) | 0C to +70C (commercial) |
主要差異化特點
- Mature Altera pedigree with broad legacy FPGA family support (對比EPC2LC20N)
- Documented in-system programmable (ISP) interface (對比EPC1 family (older generation))
- Dual-voltage (3.3 V / 5 V) operation in one part (對比EPCQ serial configuration devices)
設計說明
Do not assume EPC2 family part-number suffixes (L20 vs LI20 vs LC20) are interchangeable without verifying against the manufacturer datasheet. The 'I' or 'C' suffix may denote industrial-grade temperature range or packaging variants. When designing for new production, verify the exact ordering code with Intel/Altera part-number decoder. The EPC2 family is NRNR; new designs should use EPCQ or EPCQL serial configuration devices in SOIC-8 instead.
Use a 20-pin PLCC socket for the EPC2L20N to allow field replacement during maintenance cycles and bitstream updates. Place the PROM close to the FPGA's configuration pins to minimize trace length on DCLK and DATA lines. Add 0.1 uF decoupling capacitors at VCC and VPP pins, located within 100 mils of the package. Observe the configuration interface timing diagrams in the Altera datasheet when designing cascade chains across multiple PROMs.
When cascading multiple EPC2 PROMs for bitstreams larger than 1.6 Mbit, route the nCE chip-enable signal in a daisy chain from the FPGA's nCONFIG-driven logic. Each PROM's DATA output connects to the next PROM's DATA input through a small buffer if trace length exceeds 2 inches. Refer to the Altera Configuration Devices datasheet for the exact cascade timing diagram. Maintain consistent impedance on DCLK traces to avoid configuration errors.
The EPC2L20N's configuration interface uses single-ended DCLK and DATA signals. Keep these traces short and well-separated from switching-power and high-current traces to avoid coupling noise that could cause FPGA configuration failures. Add a series damping resistor (22-33 ohm) on the DCLK output if the load is more than 4 inches or crosses multiple board layers. Verify signal integrity with the Altera configuration timing analysis tools.
合規資訊
RoHS compliant per Altera/Intel datasheet and distributor listings. REACH, halogen-free, and conflict-mineral status not explicitly documented in the verified web data; set to 'unknown' rather than assumed. AEC-Q100 is not applicable (Altera configuration PROMs are not automotive-qualified).
