The XC4028XLA-BC352AKP is a high-performance field-programmable gate array (FPGA) from Xilinx’s XC4000XLA family. Designed for demanding digital logic applications, this device combines a large gate count with low-voltage operation and a versatile 352-pin BGA package. Whether you are working on telecommunications, industrial control, or embedded systems, the XC4028XLA-BC352AKP delivers the programmable logic resources needed for complex, production-grade designs. For a broader selection of compatible devices, explore our Xilinx FPGA inventory.

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What Is the XC4028XLA-BC352AKP?

The XC4028XLA-BC352AKP is a member of the Xilinx XC4000XLA FPGA family — an enhanced, low-voltage variant of the classic XC4000 series. The “28” in the part number indicates approximately 28,000 usable logic gates, the “XLA” suffix denotes the low-voltage, high-speed process technology, and “BC352AKP” specifies the 352-ball BGA (Ball Grid Array) package with a commercial temperature rating.

This FPGA is ideal for engineers maintaining legacy designs or migrating older Xilinx-based systems, as well as those who require proven, stable logic devices for production applications.

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XC4028XLA-BC352AKP Key Specifications

The table below summarizes the primary technical parameters of the XC4028XLA-BC352AKP:

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XC4028XLA-BC352AKP Pin Configuration and Package Details

BGA Package Overview

The BC352 package is a 352-ball Ball Grid Array with a 1.27 mm ball pitch. BGA packaging offers significant board-space savings compared to equivalent QFP packages and provides excellent signal integrity at high frequencies.

I/O Bank Structure

The XC4028XLA-BC352AKP organizes its I/O pins into multiple banks, each supporting independent I/O voltage levels. This multi-bank architecture enables designers to interface with 5 V TTL, 3.3 V LVTTL, and 2.5 V LVCMOS peripherals without external level-shifting logic.

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XC4028XLA-BC352AKP Logic Resources

Configurable Logic Blocks (CLBs)

The heart of any Xilinx XC4000XLA FPGA is its Configurable Logic Block (CLB) array. Each CLB in the XC4028XLA contains:

• Two 4-input function generators (Look-Up Tables, LUTs) capable of implementing any 4-input Boolean function
• Additional dedicated carry logic for fast arithmetic operations
• Two edge-triggered D flip-flops with dedicated clock enable and reset signals
• Wide-function multiplexers for building larger logic functions efficiently

Block RAM and Distributed RAM

The XC4000XLA architecture supports distributed RAM implemented directly within the CLB LUTs. This allows on-chip memory without consuming dedicated RAM blocks, which is particularly useful for small FIFOs, register files, and lookup tables in data-path designs.

Clock Resources

The XC4028XLA-BC352AKP includes dedicated global clock buffers and clock routing networks optimized for minimal skew across the entire device. This ensures reliable clocking for designs with multiple clock domains or tight setup-and-hold timing requirements.

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Electrical Characteristics

Absolute Maximum Ratings

The table below lists the absolute maximum ratings. Exceeding these values may permanently damage the device.

DC Operating Conditions

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Configuration and Programming

Supported Configuration Modes

The XC4028XLA-BC352AKP supports multiple configuration interfaces, giving designers flexibility in how bitstream data is loaded into the device:

Configuration Memory

As an SRAM-based FPGA, the XC4028XLA-BC352AKP requires an external non-volatile configuration memory (such as a Xilinx XCFxxS Platform Flash or equivalent serial PROM). Configuration is loaded from this external memory at power-up. The SRAM cells are re-programmable an unlimited number of times, making iterative design and prototyping straightforward.

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Timing and Performance

Speed Grade

The commercial-grade variant of the XC4028XLA is optimized for operation in a 0°C to +85°C ambient temperature range. Xilinx specified internal propagation delays using a standardized worst-case corner model.

Note: Exact timing depends on the specific speed grade suffix. Consult the Xilinx XC4000XLA datasheet for precise timing specifications.

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XC4028XLA-BC352AKP vs. Comparable Variants

The XC4000XLA family includes several members with varying gate counts and package options. The table below compares the XC4028XLA-BC352AKP to key family siblings:

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Typical Applications

The XC4028XLA-BC352AKP is well-suited for a wide range of embedded and logic-intensive applications:

• Telecommunications: Line card interface logic, framing, and protocol conversion
• Industrial Automation: Motion control sequencing, sensor fusion, and machine safety logic
• Medical Devices: Signal conditioning and data acquisition front-ends
• Defense and Aerospace (commercial temp range): Avionics interface logic, radar signal processing
• Prototyping and Legacy System Maintenance: Drop-in replacement for aging FPGA designs
• Consumer Electronics: Video timing controllers and display interface logic

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Design and Development Tools

Xilinx Foundation Series / ISE Design Suite

The XC4028XLA-BC352AKP is supported by the Xilinx ISE (Integrated Synthesis Environment) design suite. Engineers can use:

• VHDL or Verilog for RTL design entry
• Xilinx CORE Generator for optimized IP cores (FIFOs, multipliers, memory controllers)
• FPGA Editor for placement and routing analysis
• ChipScope Pro for in-system logic analysis via JTAG

Third-Party EDA Support

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Ordering and Availability

Part Number Decoder

Understanding the full part number helps confirm you are ordering the correct variant:

Compatible Replacement and Cross-Reference

Engineers maintaining legacy PCB designs may also encounter the following equivalent or compatible part numbers:

Note: Always verify pin-out and timing equivalence before substituting parts in production designs.

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PCB Design Recommendations

Decoupling and Power Integrity

Proper power supply decoupling is critical for FPGA reliability. Recommended practice for the XC4028XLA-BC352AKP:

• Place 100 nF ceramic capacitors (X7R, 0402 or 0603) within 2 mm of each VCC ball
• Add 10 µF bulk capacitors per power plane to suppress low-frequency transients
• Use a dedicated 2.5 V power plane with low-impedance routing to all VCC balls
• Maintain separate GND return planes for core and I/O supplies

Signal Integrity

• Route high-speed I/O signals as 50 Ω controlled-impedance traces
• Keep clock traces short and matched in length for multi-clock designs
• Avoid routing signals under the BGA device if vias are present (use HDI design rules for dense boards)

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Frequently Asked Questions (FAQ)

Q: What is the difference between XC4028XLA and XC4028XL? The XLA suffix denotes an enhanced version of the XC4028XL with improved speed grades and lower power consumption at 2.5 V supply, compared to the XL variant’s 3.3 V operation.

Q: Is the XC4028XLA-BC352AKP RoHS compliant? Availability of RoHS-compliant versions depends on the manufacturing date code. Contact your distributor to confirm RoHS status for your specific lot.

Q: Can I program the XC4028XLA-BC352AKP with Xilinx ISE 14.7? Yes. Xilinx ISE 14.7 is the last version of ISE and provides full support for the XC4000XLA device family, including the XC4028XLA.

Q: What is the pin-out compatibility between BC352 and BGG352 packages? The BC352 and BGG352 are both 352-ball BGA packages but may have different ball pitch or array dimensions. Always verify against the Xilinx package pinout file before assuming compatibility.

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Summary

The XC4028XLA-BC352AKP is a reliable, mid-range FPGA from Xilinx’s proven XC4000XLA family, offering approximately 28,000 logic gates in a compact 352-ball BGA package. Its 2.5 V supply, versatile I/O banks, multi-mode configuration support, and extensive EDA tool compatibility make it a strong choice for both new embedded logic designs and legacy system maintenance. With 784 CLBs, dedicated carry chains, and flexible clocking resources, this device handles everything from simple glue logic to complex state machines and arithmetic data paths.

For procurement assistance or to browse additional Xilinx programmable logic devices, contact our sales team or visit our online store.