on October 2th 1,038

EP1C4F400C8 FPGA: Features, Specifications, Programming and Alternatives

If you’re working with programmable logic, the EP1C4F400C8 gives you a practical balance of performance and cost. In this article, you’ll learn what this FPGA is, its key features like logic capacity, memory, and I/O options, and how its structure supports reliable design. You’ll also see its specifications, applications in systems, programming process, and how it compares to similar parts.

Catalog

What is the EP1C4F400C8?

The EP1C4F400C8 is a member of Intel’s (formerly Altera’s) Cyclone FPGA family, designed as a cost-effective and reliable programmable logic solution. Built on a 0.13 µm SRAM process, this device offers moderate logic density and flexible I/O options within a compact FBGA-400 package. The Cyclone family, which includes devices like EP1C3, EP1C6, EP1C12, and EP1C20, was created to balance performance and affordability for scalable designs, allowing easy migration between density levels and packages. Known for stability and broad adoption, it remains a trusted choice in legacy designs.

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EP1C4F400C8 CAD Models

EP1C4F400C8 Symbol

EP1C4F400C8 Footprint

EP1C4F400C8 3D Model

EP1C4F400C8 Features

• Logic Capacity

The EP1C4F400C8 offers around 4,000 logic elements, organized into 400 Logic Array Blocks (LABs). This makes it suitable for mid-range designs that require moderate logic density while maintaining cost efficiency.

• Embedded Memory

It integrates approximately 76.5 kbits of embedded memory. This internal RAM supports data buffering, storage, and small memory functions, reducing the need for external memory components in many designs.

• High I/O Count

The device provides 301 user-configurable I/O pins in its 400-ball FBGA package. This high pin count enables rich connectivity for complex systems requiring multiple peripheral interfaces.

• Wide I/O Standards Support

It supports multiple I/O standards including LVTTL, LVCMOS, SSTL-2, SSTL-3, and differential LVDS. This flexibility allows the FPGA to interface directly with a variety of modern logic families and memory devices.

• High-Speed Differential Signaling

With LVDS support up to 640 Mbps, the FPGA handles fast data transfer requirements. This makes it practical for applications such as high-speed communication links and fast digital interfaces.

• Clock Management with PLLs

The chip integrates two Phase-Locked Loops (PLLs) and eight global clock networks. These features allow precise clock generation, multiplication, and jitter control for timing-critical applications.

• Low-Voltage Core Operation

Operating at a nominal 1.5 V core voltage, the device balances performance with lower power consumption. This voltage level was optimized for the 0.13-µm CMOS technology used in its fabrication.

• Flexible I/O Voltages

The FPGA supports I/O voltages of 1.5 V, 1.8 V, 2.5 V, and 3.3 V across different banks. This versatility enables it to interface with both legacy and modern system components.

• SRAM-Based Configuration

Like other Cyclone FPGAs, it is SRAM-based and requires reconfiguration at every power-up. This provides flexibility for updates but also necessitates an external configuration device or controller.

• Bitstream Compression Support

The EP1C4F400C8 supports compressed bitstream loading during configuration. This reduces external memory requirements and speeds up configuration times.

• PCI Compliance

It includes built-in support for PCI standards (33/66 MHz, 32/64-bit). This feature allows the device to be directly integrated into systems requiring PCI interfacing without additional bridging logic.

Cyclone LAB Structure

The diagram shows the Logic Array Block (LAB) structure used in Cyclone FPGAs like the EP1C4F400C8. Each LAB connects to a network of interconnects: row interconnects, column interconnects, and local interconnects, which route signals between logic elements and other blocks. Direct link interconnects provide fast, low-latency paths to adjacent LABs, improving timing performance in signal paths. This architecture is important because it balances routing flexibility with efficiency, enabling the FPGA to handle complex designs while keeping speed and area optimized.

Cyclone I/O Banks Diagram

The diagram illustrates the I/O bank structure of Cyclone FPGAs such as the EP1C4F400C8. The device is divided into four I/O banks, each powered by its own supply bus, allowing to mix different voltage standards within a single FPGA. All banks support a wide range of I/O standards including LVTTL, LVCMOS, LVDS, RSDS, and SSTL, while Banks 1 and 3 also support 3.3-V PCI for compatibility with legacy systems. This flexible I/O architecture is important because it enables seamless integration with diverse external devices and interfaces, making the FPGA adaptable to various applications.

EP1C4F400C8 Specifications

Type	Parameter
Manufacturer	Altera/Intel
Series	Cyclone®
Packaging	Tray
Part Status	Obsolete
Number of LABs/CLBs	400
Number of Logic Elements/Cells	4000
Total RAM Bits	78,336
Number of I/O	301
Voltage – Supply	1.425V ~ 1.575V
Mounting Type	Surface Mount
Operating Temperature	0°C ~ 85°C (TJ)
Package / Case	400-BGA
Supplier Device Package	400-FBGA (21×21)
Base Product Number	EP1C4

EP1C4F400C8 Applications

1. Digital Signal Processing (DSP)

The EP1C4F400C8 can be programmed to perform tasks such as filtering, FFTs, and signal modulation. Its combination of logic elements and embedded memory makes it suitable for high-speed processing. This allows it to replace traditional DSP chips with a flexible FPGA solution that can be reprogrammed for different algorithms.

2. Embedded and Control Systems

In industrial and embedded systems, this FPGA is often used to implement custom controllers, sequencers, and state machines. Its reconfigurable logic allows to tailor hardware behavior precisely to system needs. By integrating control logic inside the FPGA, the number of external components is reduced, improving reliability and lowering cost.

3. Communication and Interface Bridging

The device supports multiple I/O standards and can act as a bridge between different communication protocols. It is often used to connect PCI, LVDS, SDRAM, and other interfaces seamlessly within a system. This makes it highly useful in networking equipment, embedded controllers, and legacy-to-modern interface conversions.

4. Data Acquisition and Processing

With high I/O availability and flexible memory, the EP1C4F400C8 is well-suited for data collection systems. It can directly interface with ADCs and sensors, process the data in time, and prepare it for storage or transmission. Such applications are common in medical instruments, test equipment, and scientific measurement devices.

EP1C4F400C8 Similar Parts

Specification	EP1C4F400C8	EP1C4F400C8N	EP1C4F400C8NAA	EP1C4F400C6N	EP1C4F324C8N	EP1C4T144C8N
Manufacturer	Altera (Intel)	Altera (Intel)	Altera (Intel)	Altera (Intel)	Altera (Intel)	Altera (Intel)
FPGA Family	Cyclone (EP1C4)	Cyclone (EP1C4)	Cyclone (EP1C4)	Cyclone (EP1C4)	Cyclone (EP1C4)	Cyclone (EP1C4)
Logic Elements (LEs)	4,000	4,000	4,000	4,000	4,000	4,000
Embedded Memory (bits)	~76.5 kbits	~76.5 kbits	~76.5 kbits	~76.5 kbits	~76.5 kbits	~76.5 kbits
I/O Pins	301	301	301	301	249	97
Package / Case	400-FBGA	400-FBGA	400-FBGA	400-FBGA	324-FBGA	144-TQFP
Speed Grade	C8	C8	C8	C6 (faster)	C8	C8
Core Voltage	1.5 V	1.5 V	1.5 V	1.5 V	1.5 V	1.5 V
Operating Temp. Range	0°C ~ 85°C	0°C ~ 85°C	0°C ~ 85°C	0°C ~ 85°C	0°C ~ 85°C	0°C ~ 85°C

EP1C4F400C8 Programming Steps

Before you can use the EP1C4F400C8 FPGA, you must load your design into the device. Programming involves configuring the FPGA with a bitstream file so it knows how to behave as your intended circuit.

1. Select Configuration Scheme & Set MSEL Pins

You begin by choosing the configuration scheme that best fits your setup, such as Active Serial, Passive Serial, or JTAG. This is done by setting the MSEL pins to specific logic levels before power-up. Each mode uses different pins and protocols, so you need to confirm compatibility with your design tools and configuration memory. Making the right choice here ensures a smooth configuration process.

2. Apply Power & Initialize the Device

Next, power up the FPGA’s core and I/O rails within the specified voltage ranges. During startup, keep the nCONFIG pin low to hold the device in reset until the supply voltages are stable. Once stable, you release reset and the device signals readiness by driving the nSTATUS pin. This guarantees the FPGA is properly initialized before configuration begins.

3. Transmit the Configuration Bitstream

At this stage, you send the configuration data file (bitstream) into the FPGA using your selected scheme. In Active Serial or Passive Serial mode, the bitstream comes from an external memory device, while JTAG allows direct programming via cable. The device continuously reads in the configuration data until it’s complete. Your design software generates this bitstream to match your logic requirements.

4. Confirm Successful Configuration (CONF_DONE)

When the FPGA finishes loading, it asserts the CONF_DONE pin to show that configuration data was successfully received. At the same time, the device performs internal initialization such as clearing registers and activating I/O. If CONF_DONE fails to go high, it usually means the configuration data or setup has an error. Watching this pin is the simplest way to verify the process is complete.

5. Perform Optional In-System Reconfiguration

Finally, you have the option to update or reprogram the FPGA without removing it from the board. Using JTAG or an embedded controller, you can load a new bitstream directly, which is useful for firmware updates. This flexibility allows you to modify, debug, or upgrade your system even after deployment. It ensures your FPGA-based design can adapt over time to changing requirements.

EP1C4F400C8 Advantages and Disadvantages

Advantages

• Cost-efficient choice for mid-range designs

• High I/O count compared to similar density devices

• Flexible voltage and I/O standard support

• Backed by mature tools and documentation

• Lower power use than older FPGA generations

Disadvantages

• Obsolete with limited long-term availability

• Lower logic and memory capacity vs. modern FPGAs

• Slower operating speed and I/O performance

• Requires external memory for configuration on power-up

• Lacks advanced features like DSP blocks and high-speed transceivers

EP1C4F400C8 Packaging Dimensions

Type	Parameter
Package Type	FBGA (Fine-Pitch Ball Grid Array)
Ball Count	400
Ball Pitch (e)	1.0 mm (typical for Cyclone EP1C4F400)
Ball Diameter (b)	0.45 mm (nominal)
Package Size (D × E)	21 mm × 21 mm
Package Height (A)	2.40 mm (max)
Substrate Thickness (A2)	~0.40 mm
Mold Cap Thickness (A3)	~1.90 mm
Ball Height (A1)	0.25 mm (nominal)
Pin A1 Corner	Marked for orientation
Array Layout	20 × 20 grid (with corner balls missing)
Mounting	Surface Mount (SMD)

EP1C4F400C8 Manufacturer

The EP1C4F400C8 was originally manufactured by Altera Corporation, a pioneer in programmable logic devices and FPGA technology. In 2015, Altera was acquired by Intel Corporation, and the product line became part of Intel’s Programmable Solutions Group (PSG). Today, Intel supports these legacy Altera devices while focusing development on newer FPGA families, ensuring continuity for existing users and advancing innovation in programmable logic.

Conclusion

The EP1C4F400C8 stands out as a cost-efficient and versatile FPGA that offers solid performance for mid-range designs. With its 4,000 logic elements, embedded memory, extensive I/O support, and compatibility with multiple voltage and interface standards, it provides flexibility across varied applications. Its architecture, programming process, and broad usability in DSP, embedded systems, and data acquisition make it a practical choice despite its legacy status. While it lacks advanced features found in newer devices and faces limited long-term availability, it remains a reliable option seeking proven solutions in scalable FPGA designs.

Datasheet PDF

EP1C4F400C8 Datasheets:

Cyclone FPGA Family.pdf

400-FBGA Pkg Info.pdf