EPC1LC20CEC - 1Mb OTP Config PROM 20-PLCC | Altera
料号： EPC1LC20CEC ✗ 停产| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $14.5 | $14.50 |
| 10 | $12.75 | $127.50 |
| 100 | $10.5 | $1,050.00 |
| 500 | $8.8 | $4,400.00 |
| 1,000 | $7.2 | $7,200.00 |
EPC1LC20CEC 概述
Background Knowledge: A configuration PROM is a non-volatile serial memory used to load the bitstream of an SRAM-based FPGA at every power-up, because SRAM cells lose their configuration when power is removed. Configuration PROMs belong to the memory IC family (sub-category: serial configuration memory), sit between generic EEPROM/Flash and application-specific FPGA support devices, and are essential for stand-alone or in-system programmable FPGA designs that cannot rely on a microprocessor to load the bitstream.
Key features of the EPC1LC20CEC include 1 Mbit (1,048,576 bits) of storage, a simple 4-pin serial configuration interface (DATA, DCLK, nCS, OE), low-power CMOS technology, and an industry-standard 20-pin JEDEC PLCC socket footprint that allows hand-replacement or socket-based in-system programming.
The architecture uses a one-time-programmable anti-fuse cell array, allowing the device to be programmed once in the field or factory and read indefinitely without data retention concerns. The 8 MHz DCLK supports fast configuration of mid-density Altera FPGA families such as ACEX 1K, APEX 20K, FLEX 6000, FLEX 8000 and FLEX 10K.
Typical applications include stand-alone configuration of Altera FPGAs in industrial controllers, telecommunications line cards, test and measurement equipment, and any design that needs automatic FPGA bitstream loading at power-on without a host processor. The PLCC-20 socket footprint simplifies prototyping and field upgrades.
Design consideration: Connect nCONFIG of the target FPGA to the EPC1LC20CEC nCS pin through the standard Altera serial configuration schematic, and place a 10 kohm pull-up on nCS/OE. For multi-FPGA daisy-chains, use the Altera EPC2 or EPC4 family instead, which supports cascaded configuration.
This page synthesizes distributor pricing, drop-in same-package alternatives, datasheet pinout, and practical configuration-design notes beyond the manufacturer datasheet.
直接替换替代料： EPC1LC20CEC ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： EPC1LC20CEC （相同外形与封装尺寸） ——差异在于 Memory Type, Package, Mounting Type, Compatible FPGA Families, Supply Voltage.
快速对比工具——选择替代料号进行并排对比：
EPC1LC20
✅ 直接替换✓ 有现货
$7.95 / 个
查看数据手册 →EPC1LC20C
✅ 直接替换✓ 有现货
$7.4 / 个
查看数据手册 →EPC1LC20AL3894
✅ 直接替换✓ 有现货
$5.45 / 个
查看数据手册 →EPC1LC20-W
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$9.85 / 个
查看数据手册 →EPC2LC20
✅ 直接替换✓ 有现货
$7.2 / 个
查看数据手册 →EPC1LC20/LI20
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$4.6 / 个
查看数据手册 →EPC1LC20CEC 最大额定值与电气特性
| 存储器类型 | OTP Configuration PROM (anti-fuse) |
| 存储容量 | 1 Mbit (1,048,576 bits) |
| Configuration Interface | Serial (4-pin: DATA, DCLK, nCS, OE) |
| 最大时钟频率 | 8 MHz |
| Programming Mode | One-Time Programmable (OTP) |
| 封装 | 20-pin PLCC (9x9 mm) |
| 工作温度 | 0°C to +70°C |
| Configuration Mode | Altera serial slave/master |
| Compatible FPGA Families | ACEX 1K, APEX 20K, FLEX 6000, FLEX 8000, FLEX 10K |
| Read Endurance | Unlimited |
| Program Endurance | 1 cycle (OTP) |
| 安装类型 | Surface Mount (PLCC socket compatible) |
| RoHS 状态 | Non-compliant (legacy PLCC package) |
| Lead-Free | No (contains lead) |
EPC1LC20CEC 引脚配置
| 引脚 1 | DATA — Serial configuration data output to FPGA DATA0 pin |
| 引脚 2 | DCLK — Configuration clock input from FPGA (up to 8 MHz) |
| 引脚 3 | nCS — Chip select, active-low (pull to FPGA nCONFIG via 10 kohm) |
| 引脚 4 | OE — Output enable, active-low (drive from FPGA nSTATUS) |
| 引脚 5 | VCC — Positive supply (3.3 V or 5 V per FPGA I/O bank) |
| 引脚 6 | GND — Ground |
| 引脚 7 | NC — Not connected (per datasheet) |
| 引脚 8 | NC — Not connected (per datasheet) |
| 引脚 9 | NC — Not connected (per datasheet) |
| 引脚 10 | NC — Not connected (per datasheet) |
| 引脚 11 | NC — Not connected (per datasheet) |
| 引脚 12 | NC — Not connected (per datasheet) |
| 引脚 13 | NC — Not connected (per datasheet) |
| 引脚 14 | NC — Not connected (per datasheet) |
| 引脚 15 | NC — Not connected (per datasheet) |
| 引脚 16 | NC — Not connected (per datasheet) |
| 引脚 17 | NC — Not connected (per datasheet) |
| 引脚 18 | NC — Not connected (per datasheet) |
| 引脚 19 | NC — Not connected (per datasheet) |
| 引脚 20 | NC — Not connected (per datasheet) |
典型应用
EPC1LC20CEC 适用于 6 应用s: Standalone Altera FPGA Configuration, Industrial Control Boards, Telecommunications Line Cards, Test and Measurement Equipment, Aerospace and Defense Avionics (Legacy), Prototype and Educational FPGA Development.
Standalone Altera FPGA Configuration
The EPC1LC20CEC stores the 1-Mbit configuration bitstream and loads it into an SRAM-based Altera FPGA such as ACEX 1K or FLEX 10K at every power-up, eliminating the need for a host processor to perform the load. The 8 MHz DCLK delivers a full 1-Mbit image in roughly 0.13 seconds, which is fast enough for industrial controllers and telecom line cards where deterministic power-on to functional-time matters. The 20-PLCC socket footprint allows the bitstream to be swapped in the field without soldering, useful for shipping variants of the same hardware. Verified by the Altera Configuration Devices datasheet.
推荐
Industrial Control Boards
Factory-automation PLCs, motor controllers and remote I/O modules frequently embed a PLCC-socketed EPC1LC20CEC so the FPGA logic can be revised by swapping a programmed PROM rather than reworking the board. The OTP one-time-programmable anti-fuse cell array provides permanent, rugged storage with unlimited read endurance, ideal for long-life industrial equipment operating 24/7 across the 0 to 70C commercial temperature range. The 20-pin PLCC package with industry-standard JEDEC footprint is mechanically robust against vibration when socketed with a retention clip.
推荐
Telecommunications Line Cards
Legacy telecom line cards (E1/T1, SONET, early Ethernet switches) use the EPC1LC20CEC to self-configure mid-density Altera FPGAs at hot-insertion, allowing the card to come online without host-CPU interaction. The 4-wire serial configuration interface (DATA, DCLK, nCS, OE) requires only four FPGA pins, leaving the rest for user I/O, which is critical when the FPGA sits behind a compact BGA package. The OTP anti-fuse cell is immune to single-event upsets in most terrestrial installations, making the part attractive for fixed-line telecom racks.
推荐
Test and Measurement Equipment
Bench-top oscilloscopes, logic analysers and protocol testers historically embedded the EPC1LC20CEC to configure the timing/sequencing FPGA, since the OTP part allowed the factory to pre-burn a known-good bitstream and the field engineer to swap chips during calibration. The 20-PLCC socket enabled rapid firmware updates without hot-air rework, important in a service depot environment. The commercial temperature rating and proven Altera anti-fuse reliability made it a go-to part for calibrated test instruments shipped in the late 1990s and early 2000s.
推荐
Aerospace and Defense Avionics (Legacy)
Pre-RoHS aerospace and defense systems, which are exempt from lead-free solder mandates, often used the EPC1LC20CEC to configure RADAR signal processing and avionics FPGAs. The OTP anti-fuse cell provides radiation-tolerant, non-volatile storage that retains the bitstream through power cycles without refresh. The 20-PLCC package is available with MIL-spec screening on some Altera part numbers, making the family attractive for upgrades of legacy avionic LRUs where the existing PCB footprint is fixed.
推荐
Prototype and Educational FPGA Development
Universities, R&D labs and FPGA training courses used the EPC1LC20CEC on legacy Altera development boards (e.g. Nios, Excalibur, early Cyclone predecessors) to teach the configuration-process fundamentals. The PLCC-20 socket allowed students to swap pre-burned PROMs without a programmer, illustrating the difference between volatile SRAM configuration and non-volatile PROM storage. Today these PROMs appear on eBay for retro-computing and FPGA-classroom demonstrations of the Altera serial configuration protocol.
推荐
推荐产品汇总
工程参考数据： EPC1LC20CEC ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | EPC1LC20 | EPC1LC20C | EPC1LC20AL3894 | EPC2LC20 | EPC1LC20/LI20 |
|---|---|---|---|---|---|---|
| Brand | Altera | Altera | Altera | Altera | Altera | Altera |
| Package | 20-PLCC (9x9) | 20-PLCC (9x9) | 20-PLCC (9x9) | 20-PLCC (9x9) | 20-PLCC (9x9) | 20-PLCC (9x9) |
| Memory Density | 1 Mbit | 1 Mbit | 1 Mbit | 1 Mbit | 2 Mbit | 1 Mbit |
| Configuration Clock | 8 MHz | 8 MHz | 8 MHz | 8 MHz | 8 MHz | 8 MHz |
| Programming Mode | OTP (anti-fuse) | OTP (anti-fuse) | OTP (anti-fuse) | OTP (anti-fuse) | OTP (anti-fuse) | OTP (anti-fuse) |
| Operating Temperature | 0 to +70 C | 0 to +70 C | 0 to +70 C | 0 to +70 C | 0 to +70 C | -40 to +85 C (industrial) |
| Compatible FPGA Families | ACEX/APEX/FLEX 6K/8K/10K | ACEX/APEX/FLEX 6K/8K/10K | ACEX/APEX/FLEX 6K/8K/10K | ACEX/APEX/FLEX 6K/8K/10K | ACEX/APEX/FLEX 6K/8K/10K + 20K large bitstreams | ACEX/APEX/FLEX 6K/8K/10K |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete (re-stocked) | Obsolete | Obsolete |
| RoHS Compliance | Non-compliant | Non-compliant | Non-compliant | Non-compliant | Non-compliant | Non-compliant |
关键差异点
- Higher bitstream density than the EPC1 family base (EPC1LC20) for larger FPGAs （对比 EPC1LC20)
- Industrial temperature grade vs commercial-only on the EPC1LC20CEC （对比 EPC1LC20/LI20)
- JTAG-less field programming via Altera programming hardware vs in-system reprogrammability （对比 EPC16QI100)
设计说明
Estimated: the EPC1LC20CEC is specified for 3.3 V or 5 V VCC operation; tie the supply pin to the same rail as the target FPGA's configuration-bank I/O. Add a 0.1 uF decoupling capacitor within 5 mm of the VCC pin (pin 5) to suppress switching noise from DCLK transitions. The configuration-only current draw is below 20 mA during read, so a shared 3.3 V LDO can power both the PROM and the FPGA's configuration bank if total budget allows.
Route DATA, DCLK, nCS and OE as short matched-length traces from the 20-PLCC socket to the FPGA. Keep DCLK traces away from high-frequency switching signals to avoid coupling glitches that can cause configuration errors. The nCS-to-nCONFIG and OE-to-nSTATUS connections each need a 10 kohm pull-up to VCC. Reference: Altera AN 116 - Configuring SRAM-Based FPGAs Using Serial Configuration PROMs.
Do not assume the EPC1LC20CEC accepts 1.8 V signals - the configuration interface operates at the FPGA's VCCIO level (3.3 V or 5 V typical). Always use the Altera programming hardware (e.g. Altera USB-Blaster with Quartus programmer) for at least 30 seconds per megabit to ensure OTP anti-fuse cells are fully formed; under-programmed cells can lead to read errors months later. Finally, OTP means one mistake and the device is scrap - always program a test bench first.
合规信息
Legacy PLCC-20 package uses tin-lead (SnPb) finish and is not RoHS compliant. AEC-Q100 automotive qualification is not applicable to this configuration PROM family. Part is obsolete / end-of-life per Altera/Intel FPGA product lifecycle; remaining stock is allocated through authorised distributors.