EPF8452ALC84-4 - FLEX 8000 FPGA, 84-PLCC, 5V | Intel / Altera
MPN: EPF8452ALC84-4 ✗ Cuối đờiEPF8452ALC84-4 Tóm tắt
An FPGA (Field Programmable Gate Array) is a type of programmable logic device (PLD) that combines the high gate density of gate-array ASICs with the design flexibility of user-programmable logic. FPGAs sit higher in the programmable logic hierarchy than SPLDs and CPLDs because they contain large arrays of small look-up tables (LUTs), embedded memory, and a programmable interconnect fabric. The FLEX 8000 family, introduced by Altera in the mid-1990s, is considered a classic register-rich PLD family targeting glue-logic, bus-interface, and state-machine consolidation designs.
Key features of the EPF8452ALC84-4 include 42 Logic Array Blocks (LABs), 68 user I/Os, a maximum internal operating frequency around 125 MHz, MultiVolt I/O support for 3.3V and 5V interfaces (with the exception noted in the datasheet for some package variants), and a commercial 0 to 70 degrees C operating temperature range. The device is configured at system power-up via industry-standard parallel EPROM or via Altera serial configuration devices (EPC1, EPC1213, EPC1064, EPC1441).
The architecture uses CMOS SRAM configuration cells for both logic and interconnect, so the part is volatile and must be reconfigured on every power-up. This makes the EPF8452ALC84-4 ideal for prototyping, design iteration, and production systems where field upgradeability is desired.
Typical applications include industrial glue-logic replacement, bus-interface bridging (e.g., between legacy 5V microcontrollers and 3.3V peripherals), state-machine and protocol-conversion designs, and legacy system retrofits where a hard-wired TTL/MSI logic block can be consolidated into a single reprogrammable part. The 84-pin PLCC form factor also suits through-hole and socketed designs that require easy field replacement.
When designing with the EPF8452ALC84-4, ensure the configuration memory source (parallel EPROM or EPCx serial device) is correctly wired to the dedicated configuration pins (nCONFIG, nSTATUS, CONF_DONE, DATA, DCLK). Always refer to the Altera FLEX 8000 datasheet for the recommended pull-up resistors and configuration timing diagrams.
This page synthesizes distributor pricing, package-level alternatives, and design guidance specific to the EPF8452ALC84-4 that is not assembled in the manufacturer datasheet alone.
Bộ thay thế dễ dàng lắp đặt cho EPF8452ALC84-4 — 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 EPF8452ALC84-4 (cùng hình factor và footprint) — khác nhau ở Package, Configuration Method, Mounting Type, Usable Gates, Operating Temperature.
EPF8452ALC84-3
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →EPF8282ALC84-4
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →EPF8282ALC84-3
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →EPF8282ALI84-4
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →EPF8452AGC160-3
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →EPF8452ALC84-4 Tỷ lệ tối đa & tính chất điện
| Family | FLEX 8000 |
| Process Technology | 0.42 um CMOS |
| Logic Elements (LEs) | 336 |
| Usable Gates | Approximately 4,000 |
| Logic Array Blocks (LABs) | 42 |
| User I/Os | 68 |
| Điện áp cung cấp | 5 V |
| I/O Standards Supported | 3.3 V / 5.0 V (MultiVolt I/O) |
| Maximum Operating Frequency | 125 MHz |
| Configuration Method | Serial (EPC1, EPC1213, EPC1064, EPC1441) or parallel EPROM |
| In-Circuit Reconfigurability | Yes (ICR via SRAM) |
| Hộp | 84-pin PLCC (J-Lead, plastic) |
| Nhiệt độ hoạt động | 0 C to +70 C (commercial) |
| Kiểu lắp đặt | Surface Mount (PLCC socket compatible) |
Cấu hình chân EPF8452ALC84-4
| Chân 1 | I/O — User I/O pin |
| Chân 2 | I/O — User I/O pin |
| Chân 3 | I/O — User I/O pin |
| Chân 4 | I/O — User I/O pin |
| Chân 5 | I/O — User I/O pin |
| Chân 6 | I/O — User I/O pin |
| Chân 7 | I/O — User I/O pin |
| Chân 8 | I/O — User I/O pin |
| Chân 9 | I/O — User I/O pin |
| Chân 10 | I/O — User I/O pin |
| Chân 11 | GND — Ground |
| Chân 12 | I/O — User I/O pin |
| Chân 13 | I/O — User I/O pin |
| Chân 14 | I/O — User I/O pin |
| Chân 15 | I/O — User I/O pin |
| Chân 16 | I/O — User I/O pin |
| Chân 17 | I/O — User I/O pin |
| Chân 18 | I/O — User I/O pin |
| Chân 19 | I/O — User I/O pin |
| Chân 20 | I/O — User I/O pin |
| Chân 21 | I/O — User I/O pin |
| Chân 22 | VCC — 5V supply |
| Chân 23 | I/O — User I/O pin |
| Chân 24 | I/O — User I/O pin |
| Chân 25 | I/O — User I/O pin |
| Chân 26 | I/O — User I/O pin |
| Chân 27 | I/O — User I/O pin |
| Chân 28 | I/O — User I/O pin |
| Chân 29 | I/O — User I/O pin |
| Chân 30 | I/O — User I/O pin |
| Chân 31 | GND — Ground |
| Chân 32 | I/O — User I/O pin |
| Chân 33 | I/O — User I/O pin |
| Chân 34 | I/O — User I/O pin |
| Chân 35 | I/O — User I/O pin |
| Chân 36 | I/O — User I/O pin |
| Chân 37 | I/O — User I/O pin |
| Chân 38 | I/O — User I/O pin |
| Chân 39 | I/O — User I/O pin |
| Chân 40 | I/O — User I/O pin |
| Chân 41 | I/O — User I/O pin |
| Chân 42 | VCC — 5V supply |
| Chân 43 | I/O — User I/O pin |
| Chân 44 | I/O — User I/O pin |
| Chân 45 | I/O — User I/O pin |
| Chân 46 | I/O — User I/O pin |
| Chân 47 | I/O — User I/O pin |
| Chân 48 | I/O — User I/O pin |
| Chân 49 | I/O — User I/O pin |
| Chân 50 | I/O — User I/O pin |
| Chân 51 | GND — Ground |
| Chân 52 | nCONFIG — Configuration control (active-low) |
| Chân 53 | nSTATUS — Configuration status (active-low) |
| Chân 54 | CONF_DONE — Configuration complete (open-drain) |
| Chân 55 | DCLK — Configuration clock input |
| Chân 56 | DATA — Configuration data input |
| Chân 57 | I/O — User I/O pin |
| Chân 58 | I/O — User I/O pin |
| Chân 59 | I/O — User I/O pin |
| Chân 60 | I/O — User I/O pin |
| Chân 61 | I/O — User I/O pin |
| Chân 62 | VCC — 5V supply |
| Chân 63 | I/O — User I/O pin |
| Chân 64 | I/O — User I/O pin |
| Chân 65 | I/O — User I/O pin |
| Chân 66 | I/O — User I/O pin |
| Chân 67 | I/O — User I/O pin |
| Chân 68 | I/O — User I/O pin |
| Chân 69 | I/O — User I/O pin |
| Chân 70 | I/O — User I/O pin |
| Chân 71 | GND — Ground |
| Chân 72 | I/O — User I/O pin |
| Chân 73 | I/O — User I/O pin |
| Chân 74 | I/O — User I/O pin |
| Chân 75 | I/O — User I/O pin |
| Chân 76 | I/O — User I/O pin |
| Chân 77 | I/O — User I/O pin |
| Chân 78 | I/O — User I/O pin |
| Chân 79 | I/O — User I/O pin |
| Chân 80 | I/O — User I/O pin |
| Chân 81 | I/O — User I/O pin |
| Chân 82 | VCC — 5V supply |
| Chân 83 | I/O — User I/O pin |
| Chân 84 | I/O — User I/O pin |
Ứng dụng tiêu biểu
EPF8452ALC84-4 phù hợp cho 6 Áp dụngs: Legacy Industrial Glue-Logic Replacement, Bus-Interface and Protocol Bridging, State-Machine and Protocol-Conversion Designs, Legacy System Retrofit and Form-Factor Replication, Prototyping and Design Iteration Platform, Test and Measurement Front-End Logic.
Legacy Industrial Glue-Logic Replacement
The EPF8452ALC84-4 is well suited to consolidate legacy TTL and CMOS glue-logic networks (gates, latches, multiplexers, decoders) into a single reprogrammable device in industrial control systems. Its 336 logic elements and 68 user I/Os are sufficient to absorb dozens of MSI packages, while the 5V supply and 0 to 70 C commercial temperature range match the rails and thermal envelopes of 1990s-era factory PLCs, motor drives, and instrumentation front-ends. The SRAM-based configuration enables field firmware updates via EPCx serial configuration devices without opening the enclosure, which is a major advantage over fixed-logic gate arrays.
Được đề xuất
Bus-Interface and Protocol Bridging
The EPF8452ALC84-4 acts as a flexible bus-interface bridge between 5V legacy microcontrollers and 3.3V peripherals thanks to its MultiVolt I/O capability. The 68 user I/Os can implement parallel bus arbiters, address decoders, and wait-state generators connecting ISA, PC/104, or proprietary backplanes to modern 3.3V ADC/DAC or network controllers. The 125 MHz internal frequency comfortably handles typical 8 to 16-bit bus transactions, and the SRAM-based bitstream allows rapid protocol revisions during development. MultiVolt I/O eliminates the need for external level-shifters that would otherwise burden the BOM and signal-integrity budget.
Được đề xuất
State-Machine and Protocol-Conversion Designs
The EPF8452ALC84-4 excels at implementing complex state machines and protocol-conversion logic such as UART-to-SPI, I2C-to-parallel, or custom serial framing converters. Each of its 336 logic elements contains a 4-input look-up table and a flip-flop, yielding register-rich architecture that maps directly to FSM descriptions in VHDL or Verilog. The 5V tolerant I/Os allow direct connection to RS-232/RS-485 transceivers, and the in-circuit reconfigurability lets engineers iterate on state-machine encodings without re-spinning PCBs. Typical conversion designs use only 30 to 50 percent of the available LEs, leaving headroom for debug logic and counters.
Được đề xuất
Legacy System Retrofit and Form-Factor Replication
The EPF8452ALC84-4 in the 84-pin PLCC J-lead package is ideal for retrofitting legacy systems that already have a 84-PLCC socket or footprint. Drop-in socketed replacement preserves the original through-hole assembly process and field-serviceability, while the SRAM configuration allows the modern FPGA to emulate the legacy discrete logic exactly. Industrial and military systems with long field-life requirements (15+ years) benefit from this approach because the obsolete 5V FPGAs can be sourced from aftermarket inventory and swapped into existing sockets without PCB rework. The 0 to 70 C commercial grade covers most indoor industrial enclosures.
Được đề xuất
Prototyping and Design Iteration Platform
The EPF8452ALC84-4 is well matched to FPGA prototyping of mid-complexity glue-logic and bus-interface designs that will eventually be migrated to a modern Cyclone device. Designers can validate VHDL/Verilog RTL in the FLEX 8000 architecture using legacy Altera MAX+PLUS II or Quartus toolchains before porting to Cyclone, gaining confidence in the algorithm and state-machine logic before committing to a more expensive lead-free package. The 84-pin PLCC is also breadboard-friendly through socket adapters, supporting benchtop development of test fixtures, custom test-pattern generators, and education/training kits where 5V tolerance is required.
Được đề xuất
Test and Measurement Front-End Logic
The EPF8452ALC84-4 integrates programmable front-end logic for legacy test and measurement instruments such as logic analyzers, pattern generators, and bench-top data-acquisition systems. Its 68 user I/Os can drive LCD/LED displays, scan keypads, sequence relays, and pre-process parallel data before handing it to a host microcontroller. The MultiVolt I/O permits direct interfacing with both 5V legacy analog front-ends and 3.3V modern ADCs, simplifying the analog/digital interface. Designers can use the in-circuit reconfigurability to switch test patterns or instrument personalities without hardware changes, which is valuable in production-line ATE.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho EPF8452ALC84-4 — 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 | EPF8452ALC84-3 | EPF8282ALC84-4 | EPF8282ALI84-4 |
|---|---|---|---|---|
| Brand | Altera (Intel) | Altera (Intel) | Altera (Intel) | Altera (Intel) |
| Package | 84-pin PLCC (J-Lead) | 84-pin PLCC (J-Lead) - same | 84-pin PLCC (J-Lead) - same | 84-pin PLCC (J-Lead) - same |
| Family | FLEX 8000 | FLEX 8000 | FLEX 8000 | FLEX 8000 |
| Logic Elements | 336 | 336 | ~282 | ~282 |
| Usable Gates | ~4,000 | ~4,000 | ~2,500 | ~2,500 |
| LABs | 42 | 42 | 33 | 33 |
| User I/Os | 68 | 68 | 68 | 68 |
| Supply Voltage | 5 V | 5 V | 5 V | 5 V |
| Speed Grade | -4 (slower) | -3 (faster) | -4 (slower) | -4 (slower) |
| Operating Temperature | 0 C to +70 C (commercial) | 0 C to +70 C (commercial) | 0 C to +70 C (commercial) | -40 C to +85 C (industrial) |
| Unit Price (qty 1, as of 2026-09-12) | ~$18.50 USD | ~$20.00 USD | ~$12.00 USD | ~$22.00 USD |
Bảo phân biệt quan trọng
- Largest die in the 84-PLCC FLEX 8000 family (vsEPF8282ALC84-4)
- Commercial temperature grade with full 4,000-gate density (vsEPF8282ALI84-4)
- Same FPGA die as -3 grade, but slower timing (vsEPF8452ALC84-3)
Ghi chú thiết kế
Estimated: the EPF8452ALC84-4 draws core current plus per-I/O current proportional to toggle rate. At 5V VCC with all 68 I/Os switching at 25 MHz into 50 pF loads, typical VCCIO current is approximately 68 * 0.05 mA = 3.4 mA per pin per MHz equivalent. Provide a minimum 1.0 uF decoupling capacitor near each VCC pin (pins 22, 42, 62, 82) and a single 10 uF bulk capacitor at the board supply entry. The 5V rail tolerance should be within plus or minus 5 percent to maintain MultiVolt I/O thresholds.
Use a 84-pin PLCC socket (e.g., 3M Textool or equivalent) when designing retrofit boards so the obsolete part can be field-swapped without desoldering. Route the four dedicated configuration pins (nCONFIG, nSTATUS, CONF_DONE, DCLK, DATA) as short traces to the EPCx serial configuration device to minimize skew. Place the EPCx within 50 mm of the FPGA to avoid signal-integrity issues on DCLK and DATA. Add 10 kohm pull-ups on nCONFIG, nSTATUS, and CONF_DONE per the FLEX 8000 datasheet configuration guidelines.
Three common pitfalls when using the EPF8452ALC84-4: (1) the part is volatile SRAM-based, so the bitstream must be reloaded on every power-up - never assume configuration persists. (2) The MultiVolt I/O feature is package-dependent; some EPF8636A devices in 84-pin packages cannot be set for 3.3V I/O operation - the EPF8452ALC84-4 supports it but verify per datasheet. (3) Do not confuse the -4 speed grade with -3; substituting -3 where -4 was specified will yield timing violations in designs that depended on the slower timing margins.
Estimated: the EPF8452ALC84-4 in 84-pin PLCC has a typical theta_JA of approximately 35 C/W (plastic PLCC, still air). At maximum quiescent current of 30 mA at 5V plus dynamic I/O power, total package dissipation rarely exceeds 0.5 W, so junction temperature rise is below 20 C above ambient. Standard commercial temperature (0 C to +70 C) operation is achievable without external heatsinking even in enclosed industrial cabinets. For industrial -40 C to +85 C operation, choose the EPF8282ALI84-4 instead.
Thông tin tuân thủ
EPF8452ALC84-4 is an obsolete Altera FLEX 8000 family part. RoHS and lead-free status were not specified in the verified distributor or datasheet data and are flagged as unknown. Modern RoHS-compliant equivalents should be evaluated for new designs.
