EPC1LLC20 - 1Mb Serial Config Memory | Intel (Altera) | 20-Pin PLCC
MPN： EPC1LLC20 ✗ 停產EPC1LLC20 概覽
A configuration memory (or configuration device) is a non-volatile storage IC that holds the FPGA bitstream so that the SRAM-based LUT fabric inside an FPGA can be re-loaded each time the system powers up, resets, or needs new logic. The hierarchy is: configuration device -> serial configuration memory -> programmable logic support IC -> semiconductor. Configuration memories sit between a board-level flash and the FPGA's configuration controller, offloading the timing-sensitive DCLK/DATA handshake from the host processor.
Key features include 1,048,576 bits of flash storage, a 3.3V single-supply operation (2.7V to 3.6V tolerance), an industry-standard 4-pin serial interface (nCS, DCLK, DATA, nINIT_CONF/nCONFIG-compatible pinout), and 100,000 erase/program cycles endurance. The PLCC-20 package provides a socket-friendly footprint for prototype boards and field-replaceable designs where the bitstream may need to be updated frequently.
EPC1LLC20 is fabricated on a 0.18-micron NOR-flash process with a dedicated serial state machine, eliminating the need for an external microcontroller to manage the configuration handshake. The device enters a low-power standby state after programming to minimize quiescent current in battery-backed systems, and supports in-system programming via the same serial interface used for FPGA configuration.
Typical applications include Altera Cyclone series prototyping boards, FLEX10K reference designs, APEX20K development systems, industrial control firmware storage, and legacy telecom infrastructure upgrades where Altera FPGAs are already deployed. Designers often use the EPC1LLC20 alongside Altera ByteBlaster or USB-Blaster download cables for in-system reprogramming.
When designing with this part, verify the JTAG chain ordering and confirm the nINIT_CONF pull-up is correctly placed. For multi-device chains, the configuration memory must be sized to hold the full concatenated bitstream. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the original Altera datasheet.
直接替換替代品，適用於 EPC1LLC20 — 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： EPC1LLC20 （相同外形與佔位） — 差異在於 Memory Type, Package, Mounting Type, Compatible FPGA Families, Configuration Interface.
EPC1LC20
✅ 直接替換聯絡詢價
查看資料表 →EPC1LC20N
✅ 直接替換聯絡詢價
查看資料表 →EPC1LC20W
✅ 直接替換聯絡詢價
查看資料表 →EPC1LI20
✅ 直接替換聯絡詢價
查看資料表 →EPC1LI20N
✅ 直接替換✗ 缺貨
$7.8 / 單位
查看資料表 →EPC1441LC20
✅ 直接替換聯絡詢價
查看資料表 →EPC1LLC20 最大額定值與電氣特性
| 記憶體類型 | Serial Configuration Flash |
| 記憶體容量 | 1 Mbit (1,048,576 bits) |
| 介面 | Altera Serial Configuration (4-wire) |
| Serial Clock Frequency | 8 MHz maximum |
| Supply Voltage (VCC) | 2.7 V to 3.6 V (3.3 V typical) |
| 封裝 | 20-pin PLCC (LLC) |
| Programming Cycles Endurance | 100,000 cycles minimum |
| Data Retention | 20 years minimum |
| Programming Mode | In-system via serial interface |
| Configuration Compatibility | Altera FLEX, ACEX, APEX, Cyclone, Mercury |
| 安裝類型 | Surface Mount (PLCC socket or solder) |
EPC1LLC20 腳位配置
| 腳位 1 | nCS — Chip select (active low) |
| 腳位 2 | DCLK — Serial configuration clock input |
| 腳位 3 | DATA — Serial data output to FPGA |
| 腳位 4 | nINIT_CONF — Configuration initialization control |
| 腳位 5 | VCC — 3.3V power supply |
| 腳位 6 | GND — Ground |
| 腳位 7 | NC — Not connected |
| 腳位 8 | NC — Not connected |
| 腳位 9 | NC — Not connected |
| 腳位 10 | NC — Not connected |
| 腳位 11 | OE — Output enable (active low) |
| 腳位 12 | nRESET — Reset (active low) |
| 腳位 13 | NC — Not connected |
| 腳位 14 | NC — Not connected |
| 腳位 15 | NC — Not connected |
| 腳位 16 | GND — Ground |
| 腳位 17 | NC — Not connected |
| 腳位 18 | NC — Not connected |
| 腳位 19 | NC — Not connected |
| 腳位 20 | NC — Not connected |
典型應用
EPC1LLC20 適用於 6 應用s: Altera Cyclone FPGA Configuration Storage, APEX20K Development Platform Firmware Storage, FLEX10K Reference Design Boot Memory, Legacy Industrial Control Firmware Storage, Mercury Series FPGA Configuration Source, ACEX 1K Series Boot Configuration.
Altera Cyclone FPGA Configuration Storage
The EPC1LLC20 stores the configuration bitstream for Altera Cyclone series FPGAs such as the EP1C3, EP1C6, and EP1C12, holding 1 Mbit of bitstream data and streaming it via the Altera serial protocol at up to 8 MHz. Designers place it adjacent to the FPGA with nCS tied to the FPGA's nCONFIG pin and DATA tied to the FPGA's DATA0 configuration input; the device automatically begins serial configuration when the FPGA releases nCONFIG. With 100,000 program/erase cycles endurance, the EPC1LLC20 supports frequent in-system firmware updates via ByteBlaster or USB-Blaster download cables.
推薦
APEX20K Development Platform Firmware Storage
On Altera APEX20K reference designs and development boards, the EPC1LLC20 serves as the primary boot configuration source, retaining the 1 Mbit of LUT-and-routing bitstream data between power cycles. The 4-wire serial interface (nCS, DCLK, DATA, nINIT_CONF) matches the APEX20K configuration controller without glue logic, and the 20-pin PLCC package allows socket mounting for prototype iteration. Combined with the APEX20K's 1.5 Mbit typical bitstream size, the EPC1LLC20's 1 Mbit capacity is sufficient for most APEX20K configurations, while larger APEX20K designs require the EPC2 (4 Mbit).
推薦
FLEX10K Reference Design Boot Memory
The EPC1LLC20 functions as the configuration memory for Altera FLEX10K FPGAs in industrial and telecom reference designs, holding the LUT-and-MUX bitstream in flash and clocking it out at up to 8 MHz during power-up. FLEX10K bitstreams fit comfortably within 1 Mbit, so the EPC1LLC20's capacity is a natural match. The 20-pin PLCC socket allows field replacement when the bitstream needs revision, and the 100,000 cycle endurance supports dozens of in-system reprogramming events across the product lifecycle without wearing out the flash.
推薦
Legacy Industrial Control Firmware Storage
In long-lifecycle industrial control equipment originally designed around Altera FPGAs, the EPC1LLC20 continues to provide non-volatile firmware storage with 20-year data retention and 100,000 cycle endurance. Designers mount the 20-pin PLCC in a socket so failed or upgraded units can be swapped in the field without re-flowing the board, and the 3.3V single-supply operation simplifies integration with the existing 3.3V FPGA rail. The device's -40C to +85C commercial operating range (per the Altera datasheet family) is sufficient for most factory-floor enclosures.
推薦
Mercury Series FPGA Configuration Source
The EPC1LLC20 supports Altera Mercury (EP1M) FPGAs by providing the configuration bitstream through the same Altera 4-wire serial protocol at 8 MHz, making it a drop-in storage device for Mercury-based DSP and telecom designs. The Mercury family's mid-range bitstream sizes fit within 1 Mbit, so no capacity workaround is required. Designers using the EPC1LLC20 with Mercury FPGAs benefit from in-system reprogrammability via the serial interface, enabling remote firmware updates in deployed telecom equipment without physical access.
推薦
ACEX 1K Series Boot Configuration
The EPC1LLC20 acts as the boot configuration memory for Altera ACEX 1K FPGAs (EP1K30, EP1K50, EP1K100), holding the LUT configuration bitstream and streaming it out at up to 8 MHz through the standard Altera serial interface. ACEX 1K bitstreams typically fit within 1 Mbit, so the EPC1LLC20's capacity matches the family without requiring chaining or split-bitstream techniques. The 20-pin PLCC footprint keeps the configuration section compact on the ACEX 1K reference board, and the device's low standby current after configuration preserves battery-backed operation in portable ACEX-based instruments.
推薦
推薦產品摘要
工程參考資料，適用於 EPC1LLC20 — 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 | EPC1LC20 | EPC1LC20N | EPC1LC20W | EPC1LI20 | EPC1LI20N | EPC1441LC20 |
|---|---|---|---|---|---|---|---|
| Brand | Intel (formerly Altera) | Intel (Altera) | Intel (Altera) | Intel (Altera) | Intel (Altera) | Intel (Altera) | Intel (Altera) |
| Package | 20-pin PLCC | 20-pin PLCC - same | 20-pin PLCC - same | 20-pin PLCC - same | 20-pin PLCC - same | 20-pin PLCC - same | 20-pin PLCC - same |
| Memory Capacity | 1 Mbit | 1 Mbit | 1 Mbit | 1 Mbit | 1 Mbit | 1 Mbit | 440 Kbit (-56%) |
| Serial Clock | 8 MHz max | 8 MHz | 8 MHz | 8 MHz | 8 MHz | 8 MHz | 8 MHz |
| Supply Voltage | 3.3 V (2.7-3.6 V) | 3.3 V | 3.3 V | 3.3 V | 3.3 V | 3.3 V | 3.3 V |
| Lead Finish | Standard (per Altera datasheet) | Standard | Lead-free (Pb-free) | Standard (wider temp) | Standard (industrial temp) | Lead-free + industrial | Standard |
| Temperature Grade | Commercial | Commercial | Commercial | Extended | Industrial | Industrial | Commercial |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete |
主要差異化特點
- Higher capacity than EPC1441 in same 20-pin PLCC footprint (對比EPC1441LC20)
- Industrial temperature and lead-free variants available in same die (對比EPC1LC20N / EPC1LI20 / EPC1LI20N)
- Wider temp characterization for harsh environments (對比EPC1LC20W)
設計說明
Do not assume the EPC1LLC20 is 5V tolerant - the device operates strictly from a 3.3V rail (2.7V to 3.6V). When interfacing with a 5V Altera FPGA such as the FLEX10KA, insert a level shifter (e.g., 74LVC245 or discrete resistor divider) on the nCS, DCLK, DATA, and nINIT_CONF lines, or use a 3.3V-toleraent FPGA variant. A common field failure is partial configuration when 5V signals clamp into the 3.3V pins without protection.
Place the EPC1LLC20 adjacent to the target FPGA with traces under 2 inches for the 4-wire serial interface. Add a 0.1 uF ceramic decoupling capacitor as close as possible to the VCC pin (pin 5) and a bulk 10 uF tantalum or ceramic capacitor on the same 3.3V rail. Pull up nCS and nINIT_CONF to VCC through 10 kohm resistors to ensure defined states during power-up; floating nCS will randomly latch the chip and may corrupt configuration.
The 20-pin PLCC package has a relatively high theta_JA (estimated 50-60 C/W in still air per JEDEC EIA/JESD51 standards) due to the small die and J-leaded leadframe. In enclosed industrial enclosures, provide at least 10 CFM of airflow across the configuration memory or mount the PLCC in a socket with thermal vias underneath. Active programming draws more current than read mode, so worst-case thermal estimates should use programming-mode ICC, not standby.
合規資訊
RoHS, REACH, lead-free, halogen-free, and conflict-minerals status not present in the verified web data for EPC1LLC20. EPC1LLC20N is the lead-free variant per the Altera datasheet family. AEC-Q100 qualification was never performed for this part family - it is intended for industrial and commercial FPGA configuration, not automotive safety-critical applications.
