EP20K400GI655-1X - 400K Gate APEX 20K FPGA, 16640 Logic Elements, 655-Pin CPGA | Altera (Intel)
MPN: EP20K400GI655-1X ✗ Cuối đờiEP20K400GI655-1X Tóm tắt
An FPGA (Field-Programmable Gate Array) is a semiconductor integrated circuit composed of configurable logic blocks (CLBs), programmable interconnect, and I/O cells that the designer can rewire after manufacture using a hardware description language (HDL). Within the broader hierarchy, FPGAs sit between CPLDs (smaller, non-volatile) and ASICs (higher NRE cost, lower unit cost); the APEX 20K family was Altera's first to combine look-up-table logic with embedded array blocks (EABs) used for on-chip RAM, ROM, and multiplier functions. The EP20K400 sits at the top of the APEX 20K family.
The EP20K400GI655-1X delivers up to 502 user I/O lines plus 4 dedicated inputs, with a 2.5 ns pin-to-pin propagation delay window typical of the -1 speed grade. Peak reflow compatibility is rated at 220 C, and the package uses a JESD-30 code of S-CPGA-P655 (ceramic, metal-sealed co-fired, square grid array, interstitial pitch). MSL 1 indicates unlimited floor-life at less than or equal to 30 C / 85% RH before soldering, simplifying board-level handling.
Typical applications include telecommunications backplanes, multi-channel DMA controllers, custom microprocessor peripherals, and legacy ASIC-replacement designs. The 655-pin CPGA package is through-hole and socket-compatible, making the EP20K400GI655-1X suitable for prototype and low-volume production where field-upgradable logic is required.
When designing with this part, engineers should confirm Quartus or MAX+PLUS II toolchain support for the APEX 20K device family, since modern Intel Quartus releases have dropped older device support. Signal integrity on the 502 I/O requires careful power-plane decoupling and pin assignment to avoid simultaneous switching noise on the shared CPGA power pins.
Bộ thay thế dễ dàng lắp đặt cho EP20K400GI655-1X — 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 EP20K400GI655-1X (cùng hình factor và footprint) — khác nhau ở Package Type, Process Technology, Family, Propagation Delay, Mounting Type.
EP20K400GI655-1
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →EP20K400GI655-1V
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →EP20K400GC655-1X
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →EP20K400GC655-1V
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →EP20K400GC655-2X
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →EP20K400GC655-3X
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Xem tài liệu →EP20K400GI655-1X Tỷ lệ tối đa & tính chất điện
| Family | APEX 20K |
| Device | EP20K400 |
| Logic Elements | 16640 |
| Number of Terminals | 655 |
| User I/O Lines | 502 |
| Dedicated Inputs | 4 |
| Package Type | Ceramic Pin Grid Array (CPGA) |
| Package Code (JESD-30) | S-CPGA-P655 |
| Package Equivalence Code | SPGA655,47X47 |
| Package Body Material | CERAMIC (metal-sealed co-fired) |
| Speed Grade | -1 |
| Propagation Delay | 2.5 ns (typical for -1 grade) |
| Process Technology | CMOS, SRAM-based configuration |
| Cấp độ độ ẩm nhạy cảm (MSL) | 1 |
| Peak Reflow Temperature | 220 C |
| Nhiệt độ hoạt động | -40 C to +85 C (industrial) |
| Kiểu lắp đặt | Through-Hole (PGA) |
| Trạng thái RoHS | Compliant |
Cấu hình chân EP20K400GI655-1X
| Chân 1 | I/O — User I/O pin (bank 1) |
| Chân 2 | I/O — User I/O pin (bank 1) |
| Chân 3 | I/O — User I/O pin (bank 1) |
| Chân 4 | I/O — User I/O pin (bank 1) |
| Chân 5 | I/O — User I/O pin (bank 1) |
| Chân 6 | VCCINT — Core supply voltage |
| Chân 7 | GND — Ground |
| Chân 8 | I/O — User I/O pin (bank 2) |
| Chân 9 | I/O — User I/O pin (bank 2) |
| Chân 10 | I/O — User I/O pin (bank 2) |
Ứng dụng tiêu biểu
EP20K400GI655-1X phù hợp cho 6 Áp dụngs: Telecommunications Backplane Interface, Multi-Channel DMA Controller, ASIC Replacement for Industrial Control, Legacy DSP and Image Processing Pipeline, Custom Microprocessor Peripheral Hub, Avionics Legacy Interface (Non-Safety-Critical).
Telecommunications Backplane Interface
The EP20K400GI655-1X is well-suited for legacy telecom backplane interface cards where 502 user I/O pins and 16640 logic elements provide ample headroom for parallel bus aggregation across multiple T1/E1 or OC-3 channels. Its 2.5 ns propagation delay on the -1 speed grade supports the 77 MHz system clock typical of 1990s-era switch fabrics. Embedded array blocks (EABs) implement per-channel elastic buffers and protocol framing without external SRAM. The CPGA-655 package is socketed, simplifying field replacement in service-depot environments where mean-time-to-repair dominates total cost of ownership.
Được đề xuất
Multi-Channel DMA Controller
With 16640 logic elements and embedded array blocks, the EP20K400GI655-1X can implement a multi-channel DMA controller for VMEbus or PCI host adapters in industrial computing. The 502 user I/O lines accommodate 8 to 16 independent scatter-gather engines, each with descriptor RAM resident in EABs. The -1 speed grade's 2.5 ns propagation delay closes timing at the 33 MHz PCI clock, while the industrial -40C to +85C range supports factory-floor deployment. Engineers porting legacy DMA designs should validate Quartus II 13.0 timing closure before committing to a board spin.
Được đề xuất
ASIC Replacement for Industrial Control
Engineers use the EP20K400GI655-1X to replace obsolete ASICs in industrial control boards where the 655-pin CPGA socket footprint matches an existing PCB and a hardware re-spin is not economical. The 16640 logic elements and 16 EABs implement glue logic, custom peripherals, and small state machines in a single device. Industrial temperature operation (-40C to +85C) handles factory ambient, while MSL 1 eliminates dry-pack handling overhead during board rework. The device's CMOS SRAM configuration allows in-system re-programming via JTAG for field firmware updates.
Được đề xuất
Legacy DSP and Image Processing Pipeline
The APEX 20K embedded array blocks on the EP20K400GI655-1X provide dedicated multiplier and RAM resources for legacy image-processing pipelines, such as those in medical imaging or industrial machine-vision controllers from the late 1990s and early 2000s. A 1024-point FFT fits comfortably in the 16640 logic elements plus 16 EABs. The 502 user I/O lines route parallel pixel data, while the -1 speed grade sustains 50 MHz pixel clocks for standard-definition video. New designs should consider migrating to a Cyclone V or Lattice ECP5 with a similar EAB structure for active toolchain support.
Được đề xuất
Custom Microprocessor Peripheral Hub
The EP20K400GI655-1X serves as a custom peripheral hub for legacy PowerPC or MIPS host processors, providing glueless bridging between the host bus and 8 to 12 peripheral interfaces (UART, timers, GPIO, custom FIFOs). The 502 I/O accommodates the bus plus peripherals without external muxing. EABs implement per-peripheral FIFOs and configuration registers, while general logic elements handle address decoding and interrupt steering. The CPGA-655 socket simplifies engineering bring-up and lets engineers swap prototypes quickly during firmware development cycles.
Được đề xuất
Avionics Legacy Interface (Non-Safety-Critical)
Non-safety-critical avionics subsystems, such as in-flight entertainment controllers or cabin-management networks, historically used the EP20K400GI655-1X because the -1V variant's +100C ceiling tolerates avionics bay ambient. The 16640 logic elements implement ARINC 429 and MIL-STD-1553 protocol engines, while the 502 I/O route multiple bus channels. The ceramic CPGA package withstands vibration better than plastic BGA alternatives, an important factor for airborne mechanical environments. Note that for new DO-254 safety-critical designs, an active-lifecycle FPGA such as Microsemi/Microchip PolarFire is now the regulatory baseline.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho EP20K400GI655-1X — 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 | EP20K400GI655-1 | EP20K400GI655-1V | EP20K400GC655-1X | EP20K400GC655-2X |
|---|---|---|---|---|---|
| Package | CPGA-655 (SPGA655,47X47) | CPGA-655 - same | CPGA-655 - same | CPGA-655 - same | CPGA-655 - same |
| Brand | Altera (Intel) | Altera (Intel) | Altera (Intel) | Altera (Intel) | Altera (Intel) |
| Logic Elements | 16640 | 16640 | 16640 | 16640 | 16640 |
| Speed Grade | -1 (fastest) | -1 | -1 | -1 | -2 (slower) |
| Operating Temperature | -40C to +85C (industrial) | 0C to +85C (commercial) | -40C to +100C (extended) | -40C to +85C (industrial) | -40C to +85C (industrial) |
| User I/O | 502 | 502 | 502 | 502 | 502 |
| Dedicated Inputs | 4 | 4 | 4 | 4 | 4 |
Bảo phân biệt quan trọng
- Industrial temperature grade at the -1 speed grade (vsEP20K400GI655-1)
- Industrial temperature envelope within standard -1X speed grade family (vsEP20K400GI655-1V)
- Original GI process revision with established die (vsEP20K400GC655-1X)
Ghi chú thiết kế
The ceramic CPGA-655 package dissipates heat primarily through the pin grid into the PCB; for sustained high-utilization designs (>80% logic element activity at 50 MHz), plan at least 2 oz copper inner planes with thermal vias under the package cavity. Forced-air cooling is recommended for closed enclosures. The 220 C peak reflow rating allows lead-bearing assembly processes compatible with RoHS exemption Annex III 7a/7c-I for large ceramic packages.
Use a PGA socket (e.g., Yamaichi IC179-655 or equivalent) to allow field replacement and prototype rework. Place decoupling capacitors (0.1 uF X7R per VCCINT pin pair, plus 10 uF tantalum per VCCIO bank) within 5 mm of the package pins. Maintain continuous ground planes on layer 2 and a dedicated VCCINT island on layer 3 to minimize SSO noise across the 502 I/O. JTAG pins (TCK, TMS, TDI, TDO, TRST) require 10 kohm pull-ups to VCCIO for stable boundary-scan operation.
Do not assume modern Quartus Prime supports the APEX 20K family - it was dropped after Quartus II 13.0. New bitstream generation requires a legacy MAX+PLUS II or Quartus II 13.0 install running on Windows 7 / Windows Server 2008 or a virtual machine. Configuration file (.sof or .pof) generation from RTL must use the older synthesis flow. Also note that the APEX 20K configuration scheme uses dedicated configuration pins (nSTATUS, CONF_DONE, nCONFIG, DCLK) which must be properly pulled during power-up; misconfiguration here prevents the device from entering user mode.
Thông tin tuân thủ
RoHS compliance is via exemption (ceramic PGA with lead-bearing terminations). Halogen-free status not stated by manufacturer. Not AEC-Q100 qualified - not intended for automotive safety-critical applications.
