EPC1LC20-WCEC52 - 1Mb OTP Config PROM, 20-PLCC | Altera
MPN: EPC1LC20-WCEC52 ✗ Cuối đờiEPC1LC20-WCEC52 Tóm tắt
What is a configuration PROM? In FPGA-based systems, SRAM-based LUT devices are volatile and must be reloaded from non-volatile memory every time they power up. A configuration PROM is a dedicated serial flash-like memory that holds the FPGA bitstream and streams it to the FPGA during the configuration phase via a standardized serial protocol (typically FPP or PS mode on Altera devices). Within the broader component hierarchy, the EPC1 sits below memory IC and above general-purpose serial flash: configuration PROM -> serial configuration memory -> non-volatile memory -> memory IC -> semiconductor.
Key features include an 8 MHz configuration clock, low-power CMOS process, hardware reset pin, JTAG-compliant ISP, and dedicated open-drain CONF_DONE and nSTATUS handshake lines. The part supports 3.3 V and 5.0 V operation and replaces the older EPC1 family while maintaining pin compatibility with the 20-pin PLCC footprint used across the original EPC1 generation.
Architecturally, the EPC1LC20 uses an internal oscillator, a serial state machine, and an internal charge pump to drive the OTP cells during programming. It exposes only four active signals to the FPGA: nCS, DATA, DCLK, and nCONFIG, keeping board routing simple. Read access during configuration is sequential; once nCONFIG is asserted and nSTATUS goes high, the device clocks out the bitstream on the rising edge of DCLK until CONF_DONE is asserted.
Typical applications include standalone FPGA configuration storage for Cyclone II/III prototyping boards, factory programming for production Altera FPGA modules, JTAG-programmable single-FPGA designs, and design migration paths where older EPC1/EPC2 PROMs are being requalified. The 20-PLCC through-hole footprint also suits legacy industrial control and test equipment where socketed configuration memory is preferred for in-field bitstream updates.
When designing with this part, note that the OTP array cannot be re-erased - the JTAG ISP path performs the one and only programming operation. Ensure your JTAG chain order and TMS/TCK termination match the IEEE 1149.1 specification, and decouple VCC with a 0.1 uF ceramic capacitor placed within 5 mm of the supply pin to suppress programming-induced transients.
This page synthesizes distributor pricing, drop-in alternatives in the same 20-PLCC footprint, and practical configuration-routing design notes that go beyond what is printed in the original Altera datasheet.
Bộ thay thế dễ dàng lắp đặt cho EPC1LC20-WCEC52 — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với EPC1LC20-WCEC52 (cùng hình factor và footprint) — khác nhau ở Memory Type, Package, Mounting Type, Interface, Compatible FPGA Families.
EPC1LC20
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →EPC1LC20-W
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →EPC1LC120
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →EPC1L20
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →EPC1441LC20
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →EPC1L120
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →EPC1LC20-WCEC52 Tỷ lệ tối đa & tính chất điện
| Kiểu bộ nhớ | OTP Configuration PROM (Anti-fuse) |
| Kích thước bộ nhớ | 1 Mbit (1,048,576 bits) |
| Tổ chức | 212,942 x 1 bit |
| Giao diện | Serial (Altera FPP/PS configuration protocol) |
| Configuration Clock (DCLK) | 8 MHz maximum |
| Supply Voltage (VCC) | 3.3 V |
| I/O Voltage Tolerance | 5.0 V (FPGA interface) |
| In-System Programmability | Yes (IEEE 1149.1 JTAG) |
| Programmability | One-Time Programmable (OTP) |
| Nhiệt độ hoạt động | -40C to +85C (industrial) |
| Hộp | 20-pin PLCC (J-lead, through-hole, 9x9 mm) |
| Package Mounting | Through-hole (also accepts PLCC socket) |
| Compatible FPGA Families | Cyclone, Stratix, APEX, ACEX, MAX series |
| Programming Interface | JTAG (IEEE Std 1149.1) ISP |
| Số chân | 20 |
| Trạng thái vòng đời | Obsolete (recommended replacement: EPCQ family or newer serial config devices) |
Cấu hình chân EPC1LC20-WCEC52
| Chân 1 | VCC — 3.3 V supply voltage |
| Chân 2 | nCS — Chip select (active low) |
| Chân 3 | DATA — Serial configuration data output |
| Chân 4 | DCLK — Configuration clock input |
| Chân 5 | nCONFIG — Configuration request (active low) |
| Chân 6 | nSTATUS — Configuration status (open-drain, active low) |
| Chân 7 | CONF_DONE — Configuration complete (open-drain) |
| Chân 8 | GND — Ground |
| Chân 9 | TDI — JTAG test data in |
| Chân 10 | TMS — JTAG test mode select |
| Chân 11 | TCK — JTAG test clock |
| Chân 12 | TDO — JTAG test data out |
| Chân 13 | NC — Not connected |
| Chân 14 | NC — Not connected |
| Chân 15 | NC — Not connected |
| Chân 16 | NC — Not connected |
| Chân 17 | NC — Not connected |
| Chân 18 | NC — Not connected |
| Chân 19 | NC — Not connected |
| Chân 20 | NC — Not connected |
Ứng dụng tiêu biểu
EPC1LC20-WCEC52 phù hợp cho 7 Áp dụngs: Standalone FPGA Configuration Storage, Legacy Industrial Control Board, JTAG-Programmable Development Board, Avionics and Defense Retrofit, Test and Measurement Equipment, Telecommunications Line Card, Medical Imaging Subsystem.
Standalone FPGA Configuration Storage
The EPC1LC20-WCEC52 stores the 1-Mbit configuration bitstream for SRAM-based Altera FPGAs and serially loads it during power-up via the PS configuration mode. With 1,048,576 bits of OTP storage and an 8 MHz DCLK, it can program a Cyclone or APEX device in roughly 130 ms. The 20-PLCC through-hole package fits legacy industrial backplanes where socketed PROMs simplify in-field bitstream rotation without surface-mount rework.
Được đề xuất
Legacy Industrial Control Board
Long-lifecycle industrial controllers often retain the original Altera EPC1 design for 15+ years of field service. The EPC1LC20-WCEC52's 20-PLCC socketable form allows plant technicians to swap PROMs without reballing or hot-air rework. Its 3.3 V operation and 5.0 V tolerant I/O interface cleanly to both 3.3 V and 5.0 V FPGA rails common in industrial PLCs and motor-drive controllers.
Được đề xuất
JTAG-Programmable Development Board
Engineering development kits for Cyclone and ACEX FPGAs typically include a JTAG chain with the EPC1LC20-WCEC52 attached. The on-board IEEE 1149.1 boundary-scan port enables engineers to program the OTP cells via USB-Blaster or ByteBlaster cables after PCB assembly, simplifying the bring-up workflow. Because the device is OTP, the final production bitstream is locked in only after the design is fully verified, preventing accidental field re-programming.
Được đề xuất
Avionics and Defense Retrofit
Retrofit programs for military and aerospace electronics must maintain form, fit, and function with the original BOM. The EPC1LC20-WCEC52's 20-PLCC through-hole footprint and OTP behavior satisfy legacy FFF requirements where soldering a modern SOIC replacement would require a new PCB. Industrial temperature grade (-40C to +85C) and proven Altera silicon make it a qualified component for long-life avionics platforms.
Được đề xuất
Test and Measurement Equipment
Bench-top instruments such as logic analyzers, oscilloscopes, and protocol testers often embed an Altera FPGA controlled by an EPC1 configuration PROM. The 20-PLCC socket allows service centers to swap a corrupted PROM in minutes rather than hours of board-level rework. With 1 Mbit of storage, the EPC1LC20-WCEC52 comfortably fits the bitstream of mid-density Cyclone and APEX devices used in high-speed acquisition paths.
Được đề xuất
Telecommunications Line Card
Legacy telecom line cards based on Stratix or APEX FPGAs use the EPC1LC20-WCEC52 to store the configuration image during card insertion. Its 3.3 V supply aligns with telecom power rails and the 5.0 V tolerant I/O safely interfaces with 5 V FPGA banks during configuration. The OTP behavior guarantees that a corrupted remote firmware push cannot permanently rewrite the boot image, an important defense-in-depth property for carrier networks.
Được đề xuất
Medical Imaging Subsystem
Medical imaging carts and portable ultrasound systems embed Altera Cyclone FPGAs configured by the EPC1LC20-WCEC52. The 20-PLCC through-hole socket simplifies in-field bitstream rotation when a device receives regulatory-approved software updates. Industrial temperature grade and Altera's mature silicon process deliver the long-term reliability expected by IEC 60601-compliant medical equipment manufacturers.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho EPC1LC20-WCEC52 — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | EPC1LC20 | EPC1LC20-W | EPC1LC120 | EPC1L20 | EPC1441LC20 | EPC1L120 |
|---|---|---|---|---|---|---|---|
| Package | 20-PLCC | 20-PLCC - same | 20-PLCC - same | 20-PLCC - same | 20-PLCC - same | 20-PLCC - same | 20-PLCC - same |
| Brand | Altera | Altera - same | Altera - same | Altera - same | Altera - same | Altera - same | Altera - same |
| Memory Density | 1 Mbit | 1 Mbit | 1 Mbit | 1 Mbit | 1 Mbit | 0.4 Mbit | 1 Mbit |
| Configuration Clock (DCLK) | 8 MHz | 8 MHz | 8 MHz | 8 MHz | 8 MHz | 8 MHz | 8 MHz |
| Supply Voltage | 3.3 V | 3.3 V | 3.3 V | 3.3 V | 3.3 V | 3.3 V | 3.3 V |
| Programming Type | OTP (JTAG ISP) | OTP (JTAG ISP) | OTP (JTAG ISP) | OTP (JTAG ISP) | OTP (JTAG ISP) | OTP (JTAG ISP) | OTP (JTAG ISP) |
| Configuration Protocol | Altera PS mode | Altera PS mode | Altera PS mode | Altera PS mode | Altera PS mode | Altera PS mode | Altera PS mode |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete |
Bảo phân biệt quan trọng
- 20-PLCC socketable through-hole footprint for legacy retrofit (vsEPCQ64A (16-SOIC, surface-mount))
- OTP behavior prevents accidental field re-programming (vsEPC2 (reprogrammable))
- Built-in IEEE 1149.1 JTAG ISP eliminates pre-programming (vsDiscrete parallel PROMs requiring pre-programming)
Ghi chú thiết kế
The EPC1LC20-WCEC52 is OTP - the JTAG ISP path performs the one and only programming operation and cannot be re-erased. Engineers sometimes mistakenly attempt a second JTAG cycle on a programmed device, which fails silently. Lock the bitstream version into your PLM (product lifecycle management) system and verify the blank device before mounting; once programmed, replacement requires a new PROM.
Place a 0.1 uF decoupling capacitor within 5 mm of the VCC pin and a bulk 10 uF tantalum or ceramic on the supply rail. CONF_DONE and nSTATUS are open-drain outputs that require external pull-up resistors (typically 4.7 kohm to the FPGA VCCIO rail). Keep the JTAG trace lengths matched within 25 mm to avoid boundary-scan timing violations.
DCLK and DATA must be length-matched within 10 mm for reliable configuration at the 8 MHz maximum rate. Series-terminate DCLK at the source with 33 ohm if the trace exceeds 50 mm. Avoid routing DCLK adjacent to switching power nodes; the JTAG state machine can misinterpret coupled noise as configuration data and lock up the FPGA.
Thông tin tuân thủ
RoHS, REACH, lead-free and halogen-free status for EPC1LC20-WCEC52 is not published in the verified distributor snippets as of 2026-09-11. Contact Intel FPGA support or request a material declaration from the distributor for compliance documentation.
