EPF8452ALC84-4 - FLEX 8000 FPGA, 84-PLCC, 5V | Intel / Altera
MPN: EPF8452ALC84-4 β End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 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 |
Drop-in alternatives for EPF8452ALC84-4 β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
EPF8452ALC84-3
β Drop-Inβ In Stock
$9.95 / Unit
View Datasheet βEPF8282ALC84-4
β Drop-Inβ In Stock
$9.75 / Unit
View Datasheet βEPF8282ALC84-3
β Drop-Inβ In Stock
$9.85 / Unit
View Datasheet βEPF8282ALI84-4
β Drop-Inβ In Stock
$8.2 / Unit
View Datasheet βEPF8452AGC160-3
β Drop-Inβ In Stock
$23.1 / Unit
View Datasheet βEPF8452ALC84-4 Maximum Ratings & Electrical Characteristics
| 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 |
| Supply Voltage | 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) |
| Package | 84-pin PLCC (J-Lead, plastic) |
| Operating Temperature | 0 C to +70 C (commercial) |
| Mounting Type | Surface Mount (PLCC socket compatible) |
EPF8452ALC84-4 Pin Configuration
| Pin 1 | I/O β User I/O pin |
| Pin 2 | I/O β User I/O pin |
| Pin 3 | I/O β User I/O pin |
| Pin 4 | I/O β User I/O pin |
| Pin 5 | I/O β User I/O pin |
| Pin 6 | I/O β User I/O pin |
| Pin 7 | I/O β User I/O pin |
| Pin 8 | I/O β User I/O pin |
| Pin 9 | I/O β User I/O pin |
| Pin 10 | I/O β User I/O pin |
| Pin 11 | GND β Ground |
| Pin 12 | I/O β User I/O pin |
| Pin 13 | I/O β User I/O pin |
| Pin 14 | I/O β User I/O pin |
| Pin 15 | I/O β User I/O pin |
| Pin 16 | I/O β User I/O pin |
| Pin 17 | I/O β User I/O pin |
| Pin 18 | I/O β User I/O pin |
| Pin 19 | I/O β User I/O pin |
| Pin 20 | I/O β User I/O pin |
| Pin 21 | I/O β User I/O pin |
| Pin 22 | VCC β 5V supply |
| Pin 23 | I/O β User I/O pin |
| Pin 24 | I/O β User I/O pin |
| Pin 25 | I/O β User I/O pin |
| Pin 26 | I/O β User I/O pin |
| Pin 27 | I/O β User I/O pin |
| Pin 28 | I/O β User I/O pin |
| Pin 29 | I/O β User I/O pin |
| Pin 30 | I/O β User I/O pin |
| Pin 31 | GND β Ground |
| Pin 32 | I/O β User I/O pin |
| Pin 33 | I/O β User I/O pin |
| Pin 34 | I/O β User I/O pin |
| Pin 35 | I/O β User I/O pin |
| Pin 36 | I/O β User I/O pin |
| Pin 37 | I/O β User I/O pin |
| Pin 38 | I/O β User I/O pin |
| Pin 39 | I/O β User I/O pin |
| Pin 40 | I/O β User I/O pin |
| Pin 41 | I/O β User I/O pin |
| Pin 42 | VCC β 5V supply |
| Pin 43 | I/O β User I/O pin |
| Pin 44 | I/O β User I/O pin |
| Pin 45 | I/O β User I/O pin |
| Pin 46 | I/O β User I/O pin |
| Pin 47 | I/O β User I/O pin |
| Pin 48 | I/O β User I/O pin |
| Pin 49 | I/O β User I/O pin |
| Pin 50 | I/O β User I/O pin |
| Pin 51 | GND β Ground |
| Pin 52 | nCONFIG β Configuration control (active-low) |
| Pin 53 | nSTATUS β Configuration status (active-low) |
| Pin 54 | CONF_DONE β Configuration complete (open-drain) |
| Pin 55 | DCLK β Configuration clock input |
| Pin 56 | DATA β Configuration data input |
| Pin 57 | I/O β User I/O pin |
| Pin 58 | I/O β User I/O pin |
| Pin 59 | I/O β User I/O pin |
| Pin 60 | I/O β User I/O pin |
| Pin 61 | I/O β User I/O pin |
| Pin 62 | VCC β 5V supply |
| Pin 63 | I/O β User I/O pin |
| Pin 64 | I/O β User I/O pin |
| Pin 65 | I/O β User I/O pin |
| Pin 66 | I/O β User I/O pin |
| Pin 67 | I/O β User I/O pin |
| Pin 68 | I/O β User I/O pin |
| Pin 69 | I/O β User I/O pin |
| Pin 70 | I/O β User I/O pin |
| Pin 71 | GND β Ground |
| Pin 72 | I/O β User I/O pin |
| Pin 73 | I/O β User I/O pin |
| Pin 74 | I/O β User I/O pin |
| Pin 75 | I/O β User I/O pin |
| Pin 76 | I/O β User I/O pin |
| Pin 77 | I/O β User I/O pin |
| Pin 78 | I/O β User I/O pin |
| Pin 79 | I/O β User I/O pin |
| Pin 80 | I/O β User I/O pin |
| Pin 81 | I/O β User I/O pin |
| Pin 82 | VCC β 5V supply |
| Pin 83 | I/O β User I/O pin |
| Pin 84 | I/O β User I/O pin |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this digital IC. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
EPF8452ALC84-4 is suitable for 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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
Recommended Products Summary
Engineering reference data for EPF8452ALC84-4 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | 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 |
Key Differentiators
- 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)
Design Notes
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.
Compliance Information
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.
