The XC4085XLA-09BG432A is a high-capacity Field Programmable Gate Array (FPGA) from Xilinx’s XC4000XLA family. This device delivers 85,000 system gates, 7,448 logic cells, and a 227 MHz operating frequency in a compact 432-pin BGA package — making it an ideal choice for engineers seeking reliable, reprogrammable logic for complex digital designs. As part of the trusted Xilinx FPGA product line, the XC4085XLA-09BG432A combines architectural flexibility with proven 0.35 µm CMOS technology.
What Is the XC4085XLA-09BG432A?
The XC4085XLA-09BG432A is a legacy but widely used FPGA from Xilinx (now AMD), belonging to the XC4000XLA/XV family. It is engineered for high-density, high-performance logic designs that require the benefits of custom VLSI without the cost and risk of a masked gate array. Built on a refined 0.35 µm CMOS process, this device offers lower power consumption, faster operation, and enhanced routing efficiency compared to earlier XC4000XL variants.
The part number decodes as follows:
| Segment |
Meaning |
| XC4085 |
85,000 system gate count |
| XLA |
XC4000XLA family (enhanced low-power variant) |
| 09 |
Speed grade –09 (227 MHz typical) |
| BG432 |
432-pin Ball Grid Array (BGA) package |
| A |
Commercial temperature range (0°C to +85°C) |
XC4085XLA-09BG432A Key Specifications
The table below summarizes the core electrical and physical parameters of the XC4085XLA-09BG432A.
| Parameter |
Value |
| Manufacturer |
Xilinx (AMD) |
| Product Family |
XC4000XLA / XC4000XV |
| System Gates |
85,000 |
| Logic Cells |
7,448 |
| Configurable Logic Blocks (CLBs) |
3,136 |
| Maximum Operating Frequency |
227 MHz |
| Supply Voltage (VCC) |
3.3 V |
| Process Technology |
0.35 µm CMOS |
| Package Type |
432-Pin BGA (BG432) |
| Package Format |
Tray |
| Temperature Range |
0°C to +85°C (Commercial) |
| Speed Grade |
–09 |
| Global Clock Networks |
8 |
| RoHS Compliance |
Compliant (lead-free variants available) |
| Lifecycle Status |
Obsolete / Legacy (available through distributors) |
XC4085XLA-09BG432A Architecture & Features
Configurable Logic Blocks (CLBs)
The XC4085XLA-09BG432A contains 3,136 Configurable Logic Blocks, the fundamental building unit of the XC4000 series. Each CLB includes two independent function generators (F and G), each supporting up to four inputs. These units can be configured as lookup tables (LUTs), shift registers, or RAM, making the device highly versatile for combinational and sequential logic.
Select-RAM™ Embedded Memory
The device integrates Select-RAM™ blocks that support dual-port, synchronous operation, enabling high-speed on-chip data storage. This is particularly well-suited for:
- FIFOs and data buffers
- Embedded lookup tables
- Lightweight frame stores
Global Clock Distribution
Eight dedicated global low-skew clock networks ensure precise, low-jitter timing synchronization across all logic blocks. This is critical for high-speed synchronous designs and multi-clock domain applications.
I/O Resources and Standards
| I/O Feature |
Details |
| Total I/O Pins |
Up to 284 user I/Os |
| Supported Standards |
LVCMOS, LVTTL, PCI, GTL+ |
| I/O Voltage |
3.3 V (VCCIO) |
| Programmable Drive Strength |
Yes |
| Slew Rate Control |
Yes (fast / slow) |
| Pull-up / Pull-down |
Configurable per pin |
JTAG Boundary Scan (IEEE 1149.1)
Full IEEE 1149.1 JTAG boundary scan support is built in, enabling:
- In-system testing and debugging
- Board-level fault isolation
- Configuration verification via readback
- Unlimited reprogramming flexibility
Low-Power Segmented Routing
Built on the 0.35 µm CMOS process, the XC4085XLA uses low-power segmented routing to minimize dynamic power consumption. This makes it well-suited for thermally constrained or energy-conscious environments.
XC4085XLA-09BG432A Package Information
The 432-pin BGA package (BG432) provides a compact, high-density footprint for surface-mount applications.
| Package Attribute |
Details |
| Package Code |
BG432 |
| Package Type |
Plastic BGA |
| Pin Count |
432 |
| Mounting Style |
Surface Mount (SMD) |
| Delivery Format |
Tray |
| Body Size |
35 mm × 35 mm (typical for 432-pin BGA) |
| Ball Pitch |
1.27 mm |
Speed Grade Comparison: XC4085XLA –07 / –08 / –09
The XC4085XLA is offered in multiple speed grades. The table below clarifies the performance differences:
| Speed Grade |
Max Frequency |
Performance Level |
Typical Use |
| –07 |
~294 MHz |
Fastest |
High-speed DSP, communications |
| –08 |
~263 MHz |
High |
Telecom, video processing |
| –09 |
~227 MHz |
Standard |
Industrial, embedded control |
The –09 speed grade in the XC4085XLA-09BG432A offers a balanced combination of performance and commercial-grade reliability, suitable for a broad range of applications.
Applications of the XC4085XLA-09BG432A
The XC4085XLA-09BG432A is deployed across a wide range of industries due to its reprogrammability, logic density, and reliable 3.3 V operation.
Industrial Automation
The device excels in industrial control systems, programmable machine controllers, and sensor interface logic. Its configurable I/O and robust CLB architecture enable tailored logic solutions without custom ASICs.
Communications & Telecom
High-speed routing resources and global clock networks make the XC4085XLA-09BG432A a strong fit for:
- Protocol conversion (UART, SPI, I2C bridging)
- Signal multiplexing
- Line-side framing logic
Digital Signal Processing (DSP)
At 227 MHz, the device supports real-time data processing pipelines, FIR filters, FFT architectures, and other signal processing tasks using CLB-based arithmetic.
Aerospace & Defense (Legacy Systems)
Many existing aerospace platforms rely on XC4000-series FPGAs. The XC4085XLA-09BG432A is widely used in legacy maintenance, system upgrades, and obsolescence management for certified avionics designs.
Medical Electronics
Imaging equipment, patient monitoring systems, and diagnostic devices benefit from the device’s parallel processing capability and flexible I/O configuration.
Automotive Infotainment & ADAS (Legacy)
Older automotive platforms — especially infotainment clusters, ECU logic, and ADAS controllers — continue to use the XC4085XLA-09BG432A for maintenance, repairs, and authorized design replications.
Programming & Development Tools
Configuration Methods
| Method |
Description |
| Master Serial |
Single FPGA config from serial PROM |
| Slave Serial |
Daisy-chain multi-FPGA configuration |
| Slave Parallel |
High-speed parallel configuration |
| Peripheral / Microprocessor Mode |
Host-controlled download |
| JTAG (IEEE 1149.1) |
Boundary scan and in-system programming |
Software Tools
The XC4085XLA-09BG432A is designed for use with Xilinx ISE Design Suite (the recommended legacy tool for XC4000 series). Modern designers may bridge older netlist files into Vivado for migration planning. VHDL and Verilog design flows are fully supported.
Ordering Information
| Part Number |
Speed Grade |
Package |
Temperature |
Format |
| XC4085XLA-07BG432C |
–07 |
BG432 |
Commercial |
Tray |
| XC4085XLA-08BG432C |
–08 |
BG432 |
Commercial |
Tray |
| XC4085XLA-09BG432A |
–09 |
BG432 |
Commercial |
Tray |
| XC4085XLA-09BG432I |
–09 |
BG432 |
Industrial |
Tray |
Note: The XC4085XLA product family is classified as obsolete/legacy. Availability is through authorized distributors and independent component suppliers. Always verify counterfeit risk management procedures when sourcing legacy FPGAs.
Frequently Asked Questions (FAQ)
What does the “A” suffix mean in XC4085XLA-09BG432A?
The “A” at the end of the part number denotes the commercial temperature range (0°C to +85°C). Industrial-grade versions typically use an “I” suffix and are rated from –40°C to +100°C.
Is the XC4085XLA-09BG432A still in production?
No. This device is classified as obsolete by AMD (formerly Xilinx). It remains available through legacy distributors, independent component suppliers, and authorized brokers. Customers managing long-lifecycle systems should consider securing buffer stock.
What is the difference between XC4085XLA-09BG432A and XC4085XLA-09BG432C?
Both parts share the same die, speed grade, and package. The suffix difference (“A” vs “C”) may reflect production lot or packaging format differences. Always verify with your supplier’s documentation to confirm specification equivalency.
Can the XC4085XLA-09BG432A be used in aerospace applications?
Yes. The XC4085XLA series has a proven track record in aerospace applications including radar processing and communication systems. Its reliability and configurability make it suitable for legacy aerospace electronics maintenance and approved design replication.
What tools are needed to program the XC4085XLA-09BG432A?
The device is programmed using the Xilinx ISE Design Suite with a compatible JTAG programmer (e.g., Xilinx Platform Cable USB II). The configuration bitstream is generated from HDL source files synthesized and implemented in ISE.
