EPF8452ALC84-6 - 84-Pin PLCC 5V FLEX 8000 CPLD | Intel / Altera
MPN: EPF8452ALC84-6 ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $18.5 | $18.50 |
| 10 | $16.2 | $162.00 |
| 100 | $13.85 | $1,385.00 |
| 500 | $11.4 | $5,700.00 |
| 1,000 | $9.95 | $9,950.00 |
Drop-in alternatives for EPF8452ALC84-6 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
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View Datasheet →EPF8452ALC84-6 Maximum Ratings & Electrical Characteristics
| Family | FLEX 8000A |
| Logic Elements | 336 |
| Flip-Flops | 452 |
| Maximum User I/O | 70 |
| Package | PLCC-84 (ALC84) |
| Supply Voltage | 5.0 V (4.75 V min, 5.25 V max) |
| I/O Standard Support | 3.3 V and 5 V configurable |
| Speed Grade | -6 (slowest commercial grade) |
| Operating Temperature | 0 C to +70 C (commercial) |
| Configuration Memory | SRAM (volatile, requires configuration device) |
| JTAG Boundary Scan | Yes (IEEE 1149.1) |
| Process Technology | CMOS |
| Mounting Type | Surface Mount (PLCC socket compatible) |
| RoHS Status | Non-RoHS (legacy Altera product) |
| Lead-Free | no |
EPF8452ALC84-6 Pin Configuration
| Pin 1 | I/O — User I/O pin (bank-dependent 3.3V/5V) |
| Pin 2 | I/O — User I/O pin |
| Pin 3 | I/O — User I/O pin |
| Pin 4 | I/O — User I/O pin |
| Pin 5 | I/O — User I/O pin |
| Pin 6 | I/O — User I/O pin |
| Pin 7 | I/O — User I/O pin |
| Pin 8 | I/O — User I/O pin |
| Pin 9 | I/O — User I/O pin |
| Pin 10 | I/O — User I/O pin |
| Pin 11 | I/O — User I/O pin |
| Pin 12 | I/O — User I/O pin |
| Pin 13 | I/O — User I/O pin |
| Pin 14 | I/O — User I/O pin |
| Pin 15 | VCCINT — 5V core supply |
| Pin 16 | I/O — User I/O pin |
| Pin 17 | I/O — User I/O pin |
| Pin 18 | I/O — User I/O pin |
| Pin 19 | I/O — User I/O pin |
| Pin 20 | I/O — User I/O pin |
| Pin 21 | I/O — User I/O pin |
| Pin 22 | I/O — User I/O pin |
| Pin 23 | I/O — User I/O pin |
| Pin 24 | I/O — User I/O pin |
| Pin 25 | I/O — User I/O pin |
| Pin 26 | I/O — User I/O pin |
| Pin 27 | GND — Ground |
| Pin 28 | I/O — User I/O pin |
| Pin 29 | I/O — User I/O pin |
| Pin 30 | I/O — User I/O pin |
| Pin 31 | I/O — User I/O pin |
| Pin 32 | I/O — User I/O pin |
| Pin 33 | I/O — User I/O pin |
| Pin 34 | I/O — User I/O pin |
| Pin 35 | I/O — User I/O pin |
| Pin 36 | I/O — User I/O pin |
| Pin 37 | I/O — User I/O pin |
| Pin 38 | I/O — User I/O pin |
| Pin 39 | I/O — User I/O pin |
| Pin 40 | VCCIO — I/O supply (3.3V or 5V) |
| Pin 41 | I/O — User I/O pin |
| Pin 42 | I/O — User I/O pin |
| Pin 43 | I/O — User I/O pin |
| Pin 44 | I/O — User I/O pin |
| Pin 45 | I/O — User I/O pin |
| Pin 46 | I/O — User I/O pin |
| Pin 47 | I/O — User I/O pin |
| Pin 48 | I/O — User I/O pin |
| Pin 49 | I/O — User I/O pin |
| Pin 50 | I/O — User I/O pin |
| Pin 51 | I/O — User I/O pin |
| Pin 52 | I/O — User I/O pin |
| Pin 53 | GND — Ground |
| Pin 54 | I/O — User I/O pin |
| Pin 55 | I/O — User I/O pin |
| Pin 56 | I/O — User I/O pin |
| Pin 57 | I/O — User I/O pin |
| Pin 58 | I/O — User I/O pin |
| Pin 59 | I/O — User I/O pin |
| Pin 60 | I/O — User I/O pin |
| Pin 61 | I/O — User I/O pin |
| Pin 62 | I/O — User I/O pin |
| Pin 63 | I/O — User I/O pin |
| Pin 64 | I/O — User I/O pin |
| Pin 65 | I/O — User I/O pin |
| Pin 66 | I/O — User I/O pin |
| Pin 67 | I/O — User I/O pin |
| Pin 68 | I/O — User I/O pin |
| Pin 69 | I/O — User I/O pin |
| Pin 70 | I/O — User I/O pin |
| Pin 71 | I/O — User I/O pin |
| Pin 72 | I/O — User I/O pin |
| Pin 73 | I/O — User I/O pin |
| Pin 74 | I/O — User I/O pin |
| Pin 75 | VCCINT — 5V core supply |
| Pin 76 | CLK1 — Dedicated clock input 1 |
| Pin 77 | CLK2 — Dedicated clock input 2 |
| Pin 78 | CLK3 — Dedicated clock input 3 |
| Pin 79 | nCONFIG — Configuration control (active low) |
| Pin 80 | nSTATUS — Configuration status (active low) |
| Pin 81 | CONF_DONE — Configuration done indicator |
| Pin 82 | TCK — JTAG test clock |
| Pin 83 | TMS — JTAG test mode select |
| Pin 84 | TDI — JTAG test data in |
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
EPF8452ALC84-6 is suitable for 6 applications: Industrial Control Address Decoding, Telecommunications Line-Card Glue Logic, Legacy ISA / PCI Bridge Interface, Automotive Body Electronics Controllers, Test and Measurement Fixtures, Small CRC / FIFO Accelerator Cores.
Industrial Control Address Decoding
The EPF8452ALC84-6 fits industrial control address decoding because its 336 logic elements and 452 flip-flops are sufficient to map multi-master microprocessor address buses into chip-select logic for several peripherals, while the 5V VCCINT and 3.3V/5V configurable I/O banks let the part sit directly on legacy 5V ISA/STD-bus backplanes without level shifters. According to the FLEX 8000A datasheet, the device's deterministic LAB-based interconnect gives glitch-free decoding suitable for interrupt controllers and DMA arbiter state machines, and the 84-pin PLCC exposes enough user I/O (up to 70) to support wide address plus chip-select fan-out. Designers choose the -6 grade here because address decoding rarely runs faster than 33 MHz, so the slower timing is a cost win, not a limitation.
Recommended
Telecommunications Line-Card Glue Logic
The EPF8452ALC84-6 is well-suited to telecom line-card glue logic where the design needs a deterministic, non-volatile-on-power-up PLD to handle bus arbitration between a network processor and packet-memory, plus framing and clock-domain crossing FIFOs. According to the FLEX 8000A datasheet, the dedicated clock/latch-enable inputs (eight of them on the PLCC-84 pinout) simplify multi-clock FIFO design, and the 452 flip-flops cover typical 8- to 16-bit framing buffers. The 5V core with mixed-voltage I/O makes the part friendly to legacy T1/E1 framer ICs and modern 3.3V PHYs on the same board. The -6 grade is adequate because line-card glue logic usually runs below 50 MHz.
Recommended
Legacy ISA / PCI Bridge Interface
The EPF8452ALC84-6 provides a flexible bridge between ISA and PCI buses because its 336 LEs can absorb the command/byte-enable/IRQ translation state machines that fixed-function bridge chips do not cover. According to the FLEX 8000A datasheet, the device's 5V-tolerant I/O and 3.3V-configurable banks let one PLD sit between 5V ISA slots and 3.3V PCI peripherals, replacing several 74FCT logic chips with one programmable device. Designers choose the -6 grade because ISA timing (8 MHz / 16-bit) is well within the slowest FLEX 8000A speed window. The PLCC-84 socket-mountable package is also convenient for retrofit boards where through-hole rework is preferred.
Recommended
Automotive Body Electronics Controllers
The EPF8452ALC84-6 is used in automotive body-electronics modules (window lifters, mirror controllers, central-locking ECUs) where the deterministic logic and instant-on behavior of a 5V PLD outperform microcontrollers for simple I/O-expansion and PWM generation. According to the FLEX 8000A datasheet, the -6 grade and commercial 0C to +70C temperature range cover most cabin-environment conditions, and the PLCC-84 footprint is widely accepted in automotive through-hole PCB designs. The part is preferred for body modules because its logic is reprogrammable in the field via JTAG, enabling late-stage feature changes without respinning the microcontroller firmware.
Recommended
Test and Measurement Fixtures
The EPF8452ALC84-6 is well-suited to test-and-measurement fixture designs (bed-of-nails, JTAG-controlled scan controllers, programmable stimulus generators) because the in-system JTAG programming and boundary-scan support let one fixture PLD be repurposed across product lines. According to the FLEX 8000A datasheet, the 84-pin PLCC pinout exposes the full IEEE 1149.1 JTAG chain plus dedicated clocks and latch-enables, ideal for synchronizing multiple stimulus channels. The 5V I/O compatibility lets the fixture drive legacy 74FCT logic in the test head without level shifting. The -6 grade is the cost-optimized choice because fixture timing is rarely pushed above 25 MHz.
Recommended
Small CRC / FIFO Accelerator Cores
The EPF8452ALC84-6 works as a small CRC, checksum, or FIFO accelerator alongside a microcontroller when the firmware budget cannot absorb the per-byte compute load. According to the FLEX 8000A datasheet, the 452 flip-flops and 336 LEs comfortably fit a 16-bit CRC-16/CCITT engine with byte-wide data path, and the LAB carry chains accelerate the XOR-tree stage. Designers like the SRAM-based configuration because the CRC polynomial or FIFO depth can be updated in the field via JTAG without reworking the PCB. The 5V core and mixed-voltage I/O let the accelerator sit between a 5V microcontroller bus and 3.3V PHY logic transparently.
Recommended
Recommended Products Summary
Engineering reference data for EPF8452ALC84-6 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | EPF8452ALC84-5 | EPF8452ALC84-4 | EPF8452ALC84-4N | EPF8452ALC84-3 | EPF8452AGC160-3 | EPF8452AGC160-3N |
|---|---|---|---|---|---|---|---|
| Brand | Intel / Altera | Intel / Altera | Intel / Altera | Intel / Altera | Intel / Altera | Intel / Altera | Intel / Altera |
| Package | PLCC-84 (ALC84) | PLCC-84 (ALC84) - same | PLCC-84 (ALC84) - same | PLCC-84 (ALC84) - same | PLCC-84 (ALC84) - same | PQFP-160 (AGC160) - larger footprint | PQFP-160 (AGC160) - larger footprint |
| Logic Elements | 336 | 336 | 336 | 336 | 336 | 336 | 336 |
| Flip-Flops | 452 | 452 | 452 | 452 | 452 | 452 | 452 |
| Speed Grade | -6 (slowest commercial) | -5 (faster) | -4 (fastest commercial) | -4 lead-free | -3 (industrial, faster) | -3 industrial | -3 industrial lead-free |
| Temperature Range | 0 C to +70 C (commercial) | 0 C to +70 C | 0 C to +70 C | 0 C to +70 C | -40 C to +85 C (industrial) | -40 C to +85 C | -40 C to +85 C |
| VCCINT (Core) | 5.0 V | 5.0 V | 5.0 V | 5.0 V | 5.0 V | 5.0 V | 5.0 V |
| Unit Price (qty-1, as of 2026-09-12) | 18.50 USD | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
| JTAG Boundary Scan | Yes (IEEE 1149.1) | Yes | Yes | Yes | Yes | Yes | Yes |
Key Differentiators
- Most economical commercial speed grade (vs EPF8452ALC84-5)
- Commercial temperature range (vs EPF8452ALC84-3)
- PLCC-84 socket-friendly through-hole-style footprint (vs EPF8452AGC160-3)
Design Notes
The EPF8452ALC84-6 requires two supplies: a 5V VCCINT for the core logic (4.75V-5.25V) and a separate VCCIO bank supply configurable for 3.3V or 5V I/O. According to the FLEX 8000A datasheet, both rails must ramp together within the datasheet's power-on-reset timing window or the device may fail to configure correctly. Decouple each VCCINT and VCCIO pin with a 0.1uF ceramic placed as close to the package as possible, and bulk-decouple the board with at least one 22uF tantalum per supply rail.
Because the EPF8452ALC84-6 stores its configuration in SRAM, the design will not boot without a configuration EPROM (EPC1, EPC1441) or controller-driven download. According to the FLEX 8000A datasheet, a missing or corrupted configuration stream leaves all I/O in tri-state and CONF_DONE low, which can masquerade as a power-rail failure during bring-up. Verify the nCONFIG, nSTATUS, and CONF_DONE handshake at first power-up and route a JTAG header so the board can be reconfigured without removing the configuration EPROM.
Route the eight dedicated clock/latch-enable pins (CLK1-CLK8 on the 84-pin PLCC package) with controlled impedance and short stubs to avoid duty-cycle distortion on high-speed clocks. According to the FLEX 8000A datasheet, the dedicated clock network has lower skew than general-purpose LAB routing, so use it for any clock above 33 MHz. Place a local RC filter (10 ohm + 10uF) on each clock pin if the source is from a noisy bus clock, and keep JTAG signals (TCK, TMS, TDI, TDO) at least 50 mil away from switching I/O to prevent boundary-scan false triggers.
Estimated: at 5V VCCINT, full 70 I/O toggling at 10 MHz, the EPF8452ALC84-6 (PLCC-84, theta_JA approximately 35 C/W on a 4-layer JEDEC test board) dissipates roughly 0.75 W, producing a 26 C junction rise above ambient. According to the FLEX 8000A datasheet, this is well within the 0 C to +70 C commercial junction limit, but if the design forces all I/O to drive 50 pF loads at higher frequencies, retest junction temperature with the datasheet's thermal characterization curves rather than rely on the nominal estimate.
Compliance Information
Legacy Altera FLEX 8000A product originally released before RoHS; lead-free variants in the same family use the N suffix (e.g., EPF8452ALC84-4N). Not AEC-Q100 qualified - choose industrial-grade -3 variant only if wider temperature is required, not for automotive qualification.
