EP2S15F484C4 Intel Stratix II FPGA: Specs, Pricing, Drop-in Alternatives & Design Guide

The Intel EP2S15F484C4 is a Stratix II family FPGA built on a 90 nm CMOS process, delivering 15,600 logic elements (LEs), 6,240 adaptive logic modules (ALMs), 419,328 bits of embedded TriMatrix memory, and up to 342 user I/O pins in a 484-pin FineLine BGA (FBGA-484) package measuring 23 mm × 23 mm with a 1.0 mm ball pitch. It supports core speeds up to 717 MHz, integrated DSP blocks, and I/O standards including LVDS, LVTTL, LVCMOS, SSTL, and HSTL, plus DDR, DDR2, and QDR SRAM external memory interfaces. The part is in Last Time Buy (LTB) status, but XAIPART currently lists 99,999 units in stock with MOQ 1, priced from $334.48 (qty 1) down to $205 (qty 1,000) as of 2026-09-14. This guide consolidates verified specifications, pricing tiers, drop-in replacement options, and design-in guidance for engineers managing end-of-life transitions.

Quick Answers: What Should Buyers Know About the EP2S15F484C4?

The EP2S15F484C4 targets mid-range high-performance designs: telecom line cards, baseband processing, military/aerospace signal processing, industrial imaging and machine vision, and high-throughput data acquisition. The "C4" suffix denotes the -4 mid-tier speed grade and C-grade commercial temperature range (0 °C to +85 °C junction). The device is supported by Quartus II versions 7.2 through 13.0 — the last Stratix II supporting release; newer Quartus Prime versions do not target Stratix II.

On supply: the device carries LTB status per Intel's Stratix II product change notifications, meaning Intel no longer accepts new orders for future production. Distributor listings showed 6,560–9,288 pieces as of 2026-09-09; XAIPART shows 99,999 units in stock with immediate availability as of 2026-09-14. Pricing drops from $334.48 at qty 1 to $245 at qty 500 and $205 at qty 1,000 as of 2026-09-14, so volume purchasing is advised before LTB stock depletes.

Technical Guide: How Do You Select and Design In the EP2S15F484C4?

The EP2S15F484C4's adaptive logic module architecture provides fine-grained logic packing efficiency, delivering approximately 4× the logic capacity per area compared to the prior Stratix generation. Its TriMatrix memory supports true dual-port RAM, simple dual-port RAM, single-port RAM, ROM, FIFO, and shift-register modes — often eliminating external SRAM for buffering applications.

Design workflow: Use the Quartus II design suite (versions 7.2–13.0) for synthesis, place-and-route, timing closure, power estimation, and SOPC Builder system integration. Pinout mapping for the 484-FBGA is documented in the Stratix II device handbook chapter 9 and the .pin file in the Quartus II installation. Not all 484 balls are user I/O — the remainder are power, ground, configuration, and JTAG balls.

Thermal design: At high toggle rates, the FBGA-484 package benefits from a thermal pad and forced-air cooling. The package's thermal performance supports sustained operation at full DSP utilization when paired with moderate airflow, per verified application data.

Speed grade selection: In Altera/Intel convention, the lower digit indicates the higher-performance bin, so the C4 (-4) is faster than the C3 (-3) for Fmax and timing closure. For industrial environments (-40 °C to +100 °C junction), use the EP2S15F484I4 variant instead of the commercial C4.

Alternatives & Comparison: What Are the Drop-in Replacements for the EP2S15F484C4?

Per verified FAQ data, the strongest drop-in paths are within the same 484-FBGA footprint:

• EP2S15F484C4N — lead-free variant of the same device.
• EP2S15F484C3 — slower speed grade (-3), same package and pinout, pin-to-pin compatible; suits cost-down designs where timing margin allows.
• EP2S30F484C5 — Stratix II 30K-LE device, pin-to-pin compatible in the same 484-ball footprint for logic upgrades without PCB change; re-validate power budget and timing, and confirm the -5 speed grade is acceptable.
• EP2C20F484C8 (Cyclone II) — a cost-down option when the design fits ~18K LEs; note it lacks Stratix II's DSP blocks and equal-density TriMatrix memory (verified FAQ cites ~18,752 LEs vs 15,600, and ~240 Kb vs 419 Kb embedded memory).

[DATA_NEEDED: full verified spec tables for EP2S15F484C3, EP2S30F484C5, and EP2C20F484C8 to populate a column-by-column comparison table.]

Industry Insight: What Is the Market and Lifecycle Position of the EP2S15F484C4?

The EP2S15F484C4 is in Last Time Buy status per Intel's Stratix II product change notifications. Intel no longer accepts new production orders; only distributor stock remains. Distributor inventory as of 2026-09-09 ranged from 6,560 to 9,288 pieces across major listings (Heisener, AmpHeo, Veswin, Origin-IC, plus independent stockists such as Xecor and ExcessChip). Heisener's listing showed immediate shipment with estimated delivery Jul 26–Jul 31 relative to the 2026-09-09 listing date. LTB status means prices may rise as stock depletes — verified guidance is to plan volume purchases for end-of-life and to evaluate migration to Stratix IV/V or Cyclone families for long-term programs.

Trends & Outlook: What Should Buyers Watch?

Three verified anchors frame the outlook. First, supply is finite: LTB status means no replenishment, and the verified price curve ($334.48 at qty 1 vs $205 at qty 1,000 as of 2026-09-14) rewards bulk buys now. Second, toolchain freeze: Quartus II 13.0 is the last Stratix II-capable release, so maintain legacy tool environments. Third, temperature-variant availability: the I4 industrial variant (-40 °C to +100 °C junction) shares the same 484-FBGA package, so harsh-environment users should source it before commercial stock drains. For new designs, Intel's verified guidance points to Stratix IV/V or Cyclone migration paths; existing EP2S30F484-based boards can absorb this part's footprint directly, preserving PCB investments during the transition.