EPF8452ALC84-4 - FLEX 8000 FPGA, 84-PLCC, 5V | Intel / Altera
Référence : EPF8452ALC84-4 ✗ Fin de vie| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $18.5 | $18,50 |
| 10 | $16.2 | $162,00 |
| 100 | $13.75 | $1 375,00 |
| 500 | $11.4 | $5 700,00 |
| 1 000 | $9.85 | $9 850,00 |
EPF8452ALC84-4 Présentation
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.
Alternatives de remplacement direct pour EPF8452ALC84-4 — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec EPF8452ALC84-4 (même facteur de forme et même empreinte) — différant par Package, Configuration Method, Mounting Type, Usable Gates, Operating Temperature.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
EPF8452ALC84-3
✅ Remplacement direct✓ En stock
$9.95 / unité
Voir la fiche technique →EPF8282ALC84-4
✅ Remplacement direct✓ En stock
$9.75 / unité
Voir la fiche technique →EPF8282ALC84-3
✅ Remplacement direct✓ En stock
$9.85 / unité
Voir la fiche technique →EPF8282ALI84-4
✅ Remplacement direct✓ En stock
$8.2 / unité
Voir la fiche technique →EPF8452AGC160-3
✅ Remplacement direct✓ En stock
$23.1 / unité
Voir la fiche technique →EPF8452ALC84-4 Valeurs maximales et caractéristiques électriques
| 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 |
| Tension d'alimentation | 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) |
| Boîtier | 84-pin PLCC (J-Lead, plastic) |
| Température de fonctionnement | 0 C to +70 C (commercial) |
| Type de montage | Surface Mount (PLCC socket compatible) |
Configuration des broches de EPF8452ALC84-4
| Broche 1 | I/O — User I/O pin |
| Broche 2 | I/O — User I/O pin |
| Broche 3 | I/O — User I/O pin |
| Broche 4 | I/O — User I/O pin |
| Broche 5 | I/O — User I/O pin |
| Broche 6 | I/O — User I/O pin |
| Broche 7 | I/O — User I/O pin |
| Broche 8 | I/O — User I/O pin |
| Broche 9 | I/O — User I/O pin |
| Broche 10 | I/O — User I/O pin |
| Broche 11 | GND — Ground |
| Broche 12 | I/O — User I/O pin |
| Broche 13 | I/O — User I/O pin |
| Broche 14 | I/O — User I/O pin |
| Broche 15 | I/O — User I/O pin |
| Broche 16 | I/O — User I/O pin |
| Broche 17 | I/O — User I/O pin |
| Broche 18 | I/O — User I/O pin |
| Broche 19 | I/O — User I/O pin |
| Broche 20 | I/O — User I/O pin |
| Broche 21 | I/O — User I/O pin |
| Broche 22 | VCC — 5V supply |
| Broche 23 | I/O — User I/O pin |
| Broche 24 | I/O — User I/O pin |
| Broche 25 | I/O — User I/O pin |
| Broche 26 | I/O — User I/O pin |
| Broche 27 | I/O — User I/O pin |
| Broche 28 | I/O — User I/O pin |
| Broche 29 | I/O — User I/O pin |
| Broche 30 | I/O — User I/O pin |
| Broche 31 | GND — Ground |
| Broche 32 | I/O — User I/O pin |
| Broche 33 | I/O — User I/O pin |
| Broche 34 | I/O — User I/O pin |
| Broche 35 | I/O — User I/O pin |
| Broche 36 | I/O — User I/O pin |
| Broche 37 | I/O — User I/O pin |
| Broche 38 | I/O — User I/O pin |
| Broche 39 | I/O — User I/O pin |
| Broche 40 | I/O — User I/O pin |
| Broche 41 | I/O — User I/O pin |
| Broche 42 | VCC — 5V supply |
| Broche 43 | I/O — User I/O pin |
| Broche 44 | I/O — User I/O pin |
| Broche 45 | I/O — User I/O pin |
| Broche 46 | I/O — User I/O pin |
| Broche 47 | I/O — User I/O pin |
| Broche 48 | I/O — User I/O pin |
| Broche 49 | I/O — User I/O pin |
| Broche 50 | I/O — User I/O pin |
| Broche 51 | GND — Ground |
| Broche 52 | nCONFIG — Configuration control (active-low) |
| Broche 53 | nSTATUS — Configuration status (active-low) |
| Broche 54 | CONF_DONE — Configuration complete (open-drain) |
| Broche 55 | DCLK — Configuration clock input |
| Broche 56 | DATA — Configuration data input |
| Broche 57 | I/O — User I/O pin |
| Broche 58 | I/O — User I/O pin |
| Broche 59 | I/O — User I/O pin |
| Broche 60 | I/O — User I/O pin |
| Broche 61 | I/O — User I/O pin |
| Broche 62 | VCC — 5V supply |
| Broche 63 | I/O — User I/O pin |
| Broche 64 | I/O — User I/O pin |
| Broche 65 | I/O — User I/O pin |
| Broche 66 | I/O — User I/O pin |
| Broche 67 | I/O — User I/O pin |
| Broche 68 | I/O — User I/O pin |
| Broche 69 | I/O — User I/O pin |
| Broche 70 | I/O — User I/O pin |
| Broche 71 | GND — Ground |
| Broche 72 | I/O — User I/O pin |
| Broche 73 | I/O — User I/O pin |
| Broche 74 | I/O — User I/O pin |
| Broche 75 | I/O — User I/O pin |
| Broche 76 | I/O — User I/O pin |
| Broche 77 | I/O — User I/O pin |
| Broche 78 | I/O — User I/O pin |
| Broche 79 | I/O — User I/O pin |
| Broche 80 | I/O — User I/O pin |
| Broche 81 | I/O — User I/O pin |
| Broche 82 | VCC — 5V supply |
| Broche 83 | I/O — User I/O pin |
| Broche 84 | I/O — User I/O pin |
Applications typiques
EPF8452ALC84-4 convient pour 6 applications: 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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour EPF8452ALC84-4 — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | 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 |
Principaux différenciateurs
- Largest die in the 84-PLCC FLEX 8000 family (vs EPF8282ALC84-4)
- Commercial temperature grade with full 4,000-gate density (vs EPF8282ALI84-4)
- Same FPGA die as -3 grade, but slower timing (vs EPF8452ALC84-3)
Notes de conception
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.
Informations de conformité
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.
