EP4CE55F23C8N Datasheet, Pinout, Equivalents, and Specs

The EP4CE55F23C8N is the highest-density FPGA in Intel's (formerly Altera) Cyclone IV E family, fabricated on a 60 nm low-power process with a 1.2 V core supply. It integrates 55,856 logic elements, 2,340 Kbit of embedded M9K SRAM, 154 embedded 18×18 multipliers, and 4 PLLs in a 484-pin FineLine BGA package. With 325 user I/O pins, speed grade C8, and commercial-grade operation (0 °C to 85 °C), the EP4CE55F23C8N powers the Opal Kelly ZEM4310 integration module and targets high-channel-count DSP, multi-protocol bridging, Nios II soft-processor SoC builds, and industrial control systems requiring maximum programmable logic density within the Cyclone IV platform.

1. What Is the EP4CE55F23C8N?

The EP4CE55F23C8N belongs to the Cyclone IV E product line — Intel's 60 nm, low-power FPGA family designed for cost-sensitive, high-volume applications. The “EP4CE55” designation indicates the Cyclone IV E die with 55,856 logic elements (the largest in the family), “F23” specifies the 484-FBGA package (23 × 23 mm body), “C8” denotes the slowest commercial speed grade, and the trailing “N” confirms lead-free (RoHS-compliant) packaging.

Compared to smaller members of the family such as the EP4CE30F23C8N (28,848 LEs) or the EP4CE15F23C8N (15,408 LEs), the EP4CE55 delivers nearly twice the logic capacity of the EP4CE30 and four times that of the EP4CE15, along with dramatically more embedded RAM and multiplier resources. This makes it the go-to device for designs that push the limits of the Cyclone IV E architecture before requiring a migration to Cyclone V or Cyclone 10 GX.

The 260 M9K embedded memory blocks provide 2,340 Kbit of dual-port SRAM, each configurable as single-port RAM, simple dual-port, true dual-port RAM, ROM, or FIFO buffers operating at up to 260 MHz. The 154 embedded 18×18 multipliers support high-throughput DSP operations, with each block capable of implementing one 18×18 or two independent 9×9 multiplications. Four general-purpose PLLs deliver clock synthesis, multiplication, division, and phase shifting across 20 global clock networks.

2. Pinout Configuration and Packaging

The EP4CE55F23C8N is housed in a 484-pin FineLine BGA (FBGA) package with a 23 × 23 mm body and 1.0 mm ball pitch. The BGA uses a 22 × 22 ball grid array with depopulated corners. Of the 484 balls, 325 are available as user I/O, distributed across eight independent I/O banks — the maximum bank count available in the Cyclone IV E family.

Each I/O bank supports an independent V_CCIO supply rail, enabling mixed-voltage interfacing within a single device. The I/O element (IOE) architecture supports multiple single-ended standards — LVTTL (3.3 V), LVCMOS (1.2 V to 3.3 V), SSTL-2, SSTL-18, and HSTL — along with differential LVDS at up to 640 Mbps, mini-LVDS, RSDS, LVPECL, BLVDS, and PPDS. PCI and PCI-X compliance is supported for 33 MHz and 66 MHz bus operation.

The F23 package provides dedicated clock input pins on all four sides of the die that connect directly to the 20 global clock networks and 4 PLLs. Configuration pins support Active Serial (AS) mode using an EPCS64 or EPCS128 serial configuration device, Passive Serial (PS), Fast Passive Parallel (FPP), and JTAG via the IEEE 1149.1 boundary-scan port. The MSEL[1:0] pins determine the configuration scheme at power-up. BGA ball assignments are documented in the Cyclone IV E Pin-Out Files available from Intel's download center.

3. Specifications Parameter Table

Parameter	Value
Manufacturer	Intel (formerly Altera)
Family	Cyclone IV E
Process Node	60 nm low-power CMOS
Logic Elements (LEs)	55,856
Logic Array Blocks (LABs)	3,491
M9K Memory Blocks	260
Total Embedded RAM	2,340 Kbit
Embedded 18×18 Multipliers	154
PLLs	4 (5 outputs per PLL)
Global Clock Networks	20
User I/O Pins	325
I/O Banks	8
Package	484-FBGA (23 × 23 mm, 1.0 mm ball pitch)
Core Voltage (VCCINT)	1.15 V to 1.25 V (nominal 1.2 V)
Max I/O Voltage (VCCIO)	3.6 V
Clock Network Performance (C8)	402 MHz
Speed Grade	C8 (Commercial, 0 °C to 85 °C)
I/O Standards	LVTTL, LVCMOS, SSTL-2, SSTL-18, HSTL, LVDS, PCI, PCI-X
External Memory Interfaces	DDR, DDR2, SDR SDRAM
Configuration Modes	Active Serial (AS), Passive Serial (PS), FPP, JTAG
RoHS Compliant	Yes (lead-free, “N” suffix)

4. Typical Applications and Circuit Considerations

The EP4CE55F23C8N is designed for applications requiring the highest programmable logic density in the Cyclone IV E family with extensive I/O connectivity and low power consumption. Its combination of nearly 56,000 LEs, 154 multipliers, 2,340 Kbit embedded RAM, and 325 user I/Os makes it suitable for a broad range of demanding system designs:

• Multi-Channel DSP and Baseband Processing: The 154 multiplier blocks — more than double the EP4CE30's 66 — support parallel FIR/IIR filtering, multi-channel FFT computation, digital down-conversion, and modulation/demodulation for communications systems. Quartus Prime includes optimized DSP IP cores (FIR Compiler, FFT, NCO) that efficiently map to the Cyclone IV E multiplier architecture.
• Nios II Soft-Processor SoC: With 55,856 LEs and 2,340 Kbit of on-chip RAM, the EP4CE55 comfortably hosts a Nios II/f processor core with DMA, UART, SPI, I2C, timers, and custom peripherals — leaving substantial logic headroom for hardware accelerators alongside the CPU. Multiple Nios II cores can be instantiated for parallel processing architectures.
• Video and Image Processing: The EP4CE55F23C8N supports VGA/HDMI display controllers, camera sensor interfaces (DVP parallel), real-time image filtering, and framebuffer management using its large embedded memory combined with external DDR2 SDRAM. The Opal Kelly ZEM4310 module demonstrates USB 3.0 high-bandwidth streaming with this FPGA.
• Industrial Automation and Protocol Bridging: The eight independent I/O banks with separate V_CCIO supplies enable flexible multi-voltage protocol translation — bridging between processors, ADCs, DACs, Ethernet PHYs, and multiple industrial fieldbus interfaces simultaneously.

For power supply design, Intel recommends separate decoupling for V_CCINT (1.2 V core), V_CCIO (per-bank), and V_CCA (PLL analog supply at 2.5 V). Each power ball on the BGA should have a 0.1 µF ceramic capacitor placed within 2 mm of the via, supplemented by bulk capacitors of 10–47 µF per rail. The BGA land pattern requires at least 6 PCB layers for full pin escape routing. Browse EP4CE10E22C8N for a smaller Cyclone IV E alternative, or explore the full Cyclone IV Series for related components.

4b. Video: Cyclone IV FPGA Development Tutorial

5. Equivalents, Cross-Reference, and Lifecycle

Intel announced that the Cyclone IV product line will remain in active production through at least 2040, guaranteeing long-term supply for designs using the EP4CE55F23C8N. Quartus Prime Lite and Standard editions continue to support Cyclone IV through version 23.1 and beyond, with the toolchain placed in maintenance mode (continued bug fixes, no new features).

For engineers evaluating migration paths or pin-compatible alternatives, the following cross-reference is useful:

• EP4CE55F23C7N — Same die and package, faster speed grade C7 (437.5 MHz). Drop-in replacement when higher clock performance is needed.
• EP4CE55F23C6N — Same die and package, fastest speed grade C6 (472.5 MHz). Use when timing closure at C8 is difficult.
• EP4CE40F23C8N — Next step down in the Cyclone IV E family with 39,600 LEs in the same 484-FBGA package. Pin-compatible downgrade when logic utilization is below 70%.
• EP4CE30F23C8N — Mid-range Cyclone IV E with 28,848 LEs in the same 484-FBGA package. Consider when DSP and memory requirements are modest.
• 10CL055YE144C8G (Cyclone 10 LP) — Intel's recommended forward migration for new designs. Similar logic density (55,000 LEs) with improved power efficiency and continued active development in a different package.

Second-source options for the EP4CE55 die do not exist, as Cyclone IV is proprietary to Intel. Functionally equivalent devices from competing vendors include the Lattice ECP5-45F (44,000 LUTs, open-source toolchain) and Xilinx Spartan-7 XC7S75 (76,800 logic cells, Vivado toolchain). Neither is pin-compatible.

6. Frequently Asked Questions (FAQ)

Q: What is the difference between EP4CE55F23C8N and EP4CE30F23C8N?

A: The EP4CE55F23C8N provides 55,856 logic elements with 2,340 Kbit of embedded M9K RAM and 154 multipliers, while the EP4CE30F23C8N offers 28,848 LEs with 594 Kbit RAM and 66 multipliers. Both share the same 484-FBGA package (23 × 23 mm) and C8 speed grade. The EP4CE55 nearly doubles the logic density and quadruples the memory capacity, making it the right choice for larger designs such as multi-channel DSP, complex state machines, or Nios II soft-processor systems with significant peripherals.

Q: What development tools are required to program the EP4CE55F23C8N?

A: The EP4CE55F23C8N is programmed using Intel Quartus Prime Lite Edition, a free download with full Cyclone IV support and no license restrictions. Design entry supports Verilog HDL, VHDL, and schematic capture. A USB Blaster or USB Blaster II JTAG programmer is required for configuration and debugging. ModelSim-Intel FPGA Edition provides simulation. The Opal Kelly ZEM4310 is a commercially available module featuring this FPGA with USB 3.0 and dual HSMC connectors for rapid prototyping.

Q: What is the maximum operating frequency of the EP4CE55F23C8N?

A: The EP4CE55F23C8N carries speed grade C8, the slowest of three commercial grades. Its global clock network performance reaches approximately 402 MHz, with core fabric speeds up to 420 MHz for simple register-to-register paths. The faster C6 and C7 grades of the same EP4CE55 die achieve 472.5 MHz and 437.5 MHz respectively. Actual achievable frequency depends on design complexity, routing congestion, and the timing constraints applied during Quartus Prime compilation.

Q: What package type is the EP4CE55F23C8N and what are its PCB layout considerations?

A: The EP4CE55F23C8N uses a 484-pin FineLine BGA (FBGA) package with a 23 × 23 mm body and 1.0 mm ball pitch. PCB layout requires a minimum of 6 routing layers for full pin escape. Each power ball requires a 0.1 µF ceramic capacitor placed within 2 mm of the via, supplemented by 10–47 µF bulk capacitors per power rail. The BGA requires reflow soldering with a controlled thermal profile per JEDEC J-STD-020 guidelines.

Q: Can the EP4CE55F23C8N run a Nios II soft processor?

A: Yes. The EP4CE55F23C8N has abundant resources for a Nios II/f (fast) processor core, which requires approximately 1,800 LEs. With 55,856 LEs and 2,340 Kbit of M9K RAM available, the remaining resources can implement a complete SoC including UART, SPI, I2C, timers, DMA controllers, and custom hardware accelerators. Quartus Platform Designer (formerly Qsys) generates the interconnect fabric and memory maps automatically. Multiple Nios II cores can coexist in a single EP4CE55 device for multi-processor architectures.

Q: What are the power consumption characteristics of the EP4CE55F23C8N?

A: Static power consumption at 85 °C junction temperature is typically 90–120 mW. Dynamic power depends on design-specific factors including clock frequency, toggle rate, logic utilization, and I/O switching activity. Intel provides the PowerPlay Early Power Estimator (EPE) spreadsheet for pre-design budgeting and the Quartus Prime Power Analyzer for post-compilation accuracy. The 1.2 V core supply and 60 nm process keep total power below 2 W for most typical designs. The 484-FBGA package offers good thermal dissipation through the ball array to the PCB ground plane, eliminating the need for a heatsink in most applications.

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