The XC4085XLA-09BG352I is a high-performance, low-power field-programmable gate array (FPGA) from Xilinx’s XC4000XLA family. Designed for industrial-grade applications, this device delivers powerful logic density, fast speed grades, and reliable operation across extended temperature ranges. Whether you’re designing complex digital systems, embedded controllers, or signal processing pipelines, the XC4085XLA-09BG352I offers the logic resources and flexibility to meet demanding design requirements.
For engineers and procurement specialists looking for proven Xilinx FPGA solutions, this device remains a trusted choice for both new designs and long-term production continuity.
What Is the XC4085XLA-09BG352I?
The XC4085XLA-09BG352I belongs to Xilinx’s XC4000XLA series — an advanced generation of the classic XC4000 FPGA family featuring enhanced low-voltage operation (3.3V core) and superior performance characteristics. The “XLA” designation indicates the advanced low-power variant, while the “09” speed grade reflects a 9 ns propagation delay, and “BG352” identifies the 352-ball BGA package. The “I” suffix confirms industrial temperature grade operation.
XC4085XLA-09BG352I Key Specifications
| Parameter |
Value |
| Manufacturer |
Xilinx (Rochester Electronics) |
| Part Number |
XC4085XLA-09BG352I |
| Series |
XC4000XLA |
| Logic Cells |
85,000 (typical) |
| CLB Array |
56 × 56 |
| System Gates |
Up to 1,600,000 |
| Flip-Flops |
6,272 |
| Package Type |
BG352 (BGA – Ball Grid Array) |
| Number of Pins |
352 |
| Speed Grade |
-09 (9 ns) |
| Supply Voltage (VCC) |
3.3V |
| Operating Temperature |
–40°C to +100°C (Industrial) |
| I/O Standards Supported |
LVTTL, PCI, GTL, HSTL, SSTL |
| On-Chip RAM |
Yes (Distributed & Block RAM) |
| Configuration Interface |
Serial, Parallel, Boundary Scan (JTAG) |
XC4085XLA-09BG352I Pinout and Package Details
The BG352 BGA package provides 352 solder balls arranged in a grid array, enabling high-density PCB placement with excellent signal integrity. BGA packaging is ideal for space-constrained designs where a high I/O count is required without excessive board area.
| Package Attribute |
Detail |
| Package Code |
BG352 |
| Package Type |
Ball Grid Array (BGA) |
| Total Balls |
352 |
| User I/O Pins |
Up to 260 |
| Package Dimensions |
27 mm × 27 mm (typical) |
| Ball Pitch |
1.27 mm |
| RoHS Status |
Check with distributor for specific lot |
XC4085XLA-09BG352I Logic Architecture
CLB (Configurable Logic Block) Structure
The XC4085XLA-09BG352I uses Xilinx’s mature 4-input LUT (Look-Up Table) based CLB architecture. Each CLB contains:
- Two 4-input function generators (LUTs)
- Two flip-flops with synchronous and asynchronous set/reset
- Fast carry logic for efficient arithmetic operations
- Wide function multiplexers for complex logic reduction
Memory Resources
| Memory Type |
Details |
| Distributed RAM |
Configurable LUTs used as 16×1 SRAM |
| Total Distributed RAM |
~24 Kbits |
| Configuration Memory |
SRAM-based (volatile, requires configuration on power-up) |
Clock Resources
- Multiple global clock networks for low-skew distribution
- Dedicated clock input pins with dedicated routing
- Support for up to 4 global clock signals
- DLL (Delay-Locked Loop) for clock deskewing and multiplication
XC4085XLA-09BG352I Speed Grade and Timing Performance
The -09 speed grade indicates the propagation delay characteristics of this device. Faster speed grades enable higher system clock frequencies and tighter timing margins.
| Timing Parameter |
Value |
| Propagation Delay (tPD) |
9 ns (max) |
| Setup Time (tSU) |
~3.5 ns |
| Clock-to-Output (tCO) |
~4.5 ns |
| Max System Frequency |
~80–100 MHz (design dependent) |
| I/O Output Drive |
Up to 24 mA |
Industrial Temperature Grade: XC4085XLA-09BG352I “I” Suffix
The “I” suffix on the XC4085XLA-09BG352I confirms it is rated for industrial temperature operation: –40°C to +100°C. This makes it suitable for:
- Industrial automation and motor control
- Military and aerospace sub-systems (consult datasheet for full qualification)
- Telecommunications equipment in harsh environments
- Embedded computing platforms requiring extended reliability
- Test & measurement instruments
This contrasts with commercial-grade variants (suffix “C”) rated 0°C to +85°C.
XC4085XLA-09BG352I vs. Similar Xilinx FPGAs
| Part Number |
Logic Cells |
Package |
Speed Grade |
Temp Grade |
| XC4085XLA-09BG352I |
~85,000 |
BG352 BGA |
-09 |
Industrial |
| XC4062XLA-09BG352I |
~62,000 |
BG352 BGA |
-09 |
Industrial |
| XC4085XLA-08BG352I |
~85,000 |
BG352 BGA |
-08 (faster) |
Industrial |
| XC4085XL-09BG352I |
~85,000 |
BG352 BGA |
-09 |
Commercial |
| XC4085XLA-09HQ304I |
~85,000 |
HQ304 PQFP |
-09 |
Industrial |
Configuration and Programming the XC4085XLA-09BG352I
Because the XC4085XLA-09BG352I uses SRAM-based configuration technology, it must be programmed every time power is applied. Xilinx supports several configuration modes:
Configuration Modes
| Mode |
Description |
| Master Serial |
Uses an external serial PROM (e.g., XC17xxxx) |
| Slave Serial |
Driven by an external microprocessor or FPGA |
| Master Parallel |
Faster configuration using parallel PROM |
| Slave Parallel (SelectMAP) |
High-speed byte-wide configuration |
| JTAG (Boundary Scan) |
IEEE 1149.1 standard in-system programming |
Recommended Configuration ICs
- XC1765E or XC18V04 Serial Configuration PROMs
- External EEPROM or Flash via microcontroller
- JTAG chain for lab programming and debugging
Typical Applications for XC4085XLA-09BG352I
The XC4085XLA-09BG352I is well-suited for a broad range of applications due to its high gate count, industrial rating, and mature ecosystem:
Industrial & Embedded Systems
- PLC (Programmable Logic Controller) acceleration
- Machine vision preprocessing
- Industrial Ethernet bridges and protocol converters
Communications
- SDH/SONET framing logic
- ATM cell processing
- Serial-to-parallel protocol bridges
Signal Processing
- Digital filtering (FIR/IIR)
- FFT pipeline implementations
- Radar and sonar data processing
Test & Measurement
- Logic analyzers and oscilloscope front-end control
- Automated test equipment (ATE) digital I/O
- Signal generation and capture engines
Development Tools and EDA Support
Xilinx’s legacy toolchain fully supports the XC4085XLA-09BG352I:
| Tool |
Version Supporting XC4000XLA |
| Xilinx ISE Design Suite |
Up to ISE 14.7 (final release) |
| CORE Generator |
Available in ISE 14.x |
| ChipScope Pro |
Debug and verification |
| XST (Synthesis Tool) |
Included in ISE |
| ModelSim / Questa |
Third-party simulation |
| Synopsys Design Compiler |
Third-party synthesis option |
Note: Vivado does NOT support XC4000XLA devices. Use ISE 14.7, which is available as a free download from the Xilinx (AMD) website.
Ordering Information and Availability
The XC4085XLA-09BG352I is an end-of-life (EOL) Xilinx component, but it remains available through authorized distributors and specialty component suppliers such as Rochester Electronics, who hold licensed inventory.
| Field |
Details |
| Manufacturer |
Xilinx, Inc. (now AMD) |
| Authorized Distributor |
Rochester Electronics, Digi-Key, Mouser |
| Part Status |
Obsolete / EOL — Available via authorized channels |
| Lead Time |
Check with distributor (stock-dependent) |
| Minimum Order Quantity |
Typically 1 unit |
| RoHS Compliance |
Verify per specific date code / lot |
Why Choose the XC4085XLA-09BG352I for Your Design?
- ✅ High Logic Density – ~85,000 logic cells for complex designs
- ✅ Industrial Grade – Proven –40°C to +100°C operation
- ✅ BGA Package – High I/O count in compact footprint
- ✅ Mature Ecosystem – Well-documented with decades of deployment history
- ✅ Authorized Availability – Rochester Electronics offers licensed, guaranteed-authentic stock
- ✅ Fast Speed Grade – 9 ns propagation for performance-critical paths
- ✅ Legacy Design Support – Ideal for sustaining engineering and board re-spins
Frequently Asked Questions (FAQ)
What does “XLA” mean in XC4085XLA-09BG352I?
“XLA” refers to the eXtended Low-power Advanced variant within the XC4000 family, offering improved performance and lower power consumption compared to earlier XC4000L and XC4000XL devices.
Is the XC4085XLA-09BG352I still in production?
No. The XC4085XLA-09BG352I is an end-of-life (EOL) product. However, authorized distributors like Rochester Electronics maintain licensed stockpiles to support long-lifecycle designs.
Can I replace XC4085XLA-09BG352I with a Spartan or Artix device?
It is technically possible but requires a full re-design. The pinout, I/O banks, configuration interfaces, and toolchain are not compatible. Consult an FPGA migration guide if considering a platform upgrade.
What programming software do I need?
Use Xilinx ISE Design Suite 14.7 for synthesis, implementation, and bitstream generation. ISE 14.7 is the last version to support XC4000XLA devices.
Does the XC4085XLA-09BG352I support PCI?
Yes. The device supports PCI-compliant I/O standards with appropriate external logic, and its fast I/O timing enables 33 MHz / 32-bit PCI interface designs.
Summary
The XC4085XLA-09BG352I is a robust, industrial-grade FPGA solution from Xilinx’s XC4000XLA family, offering approximately 85,000 logic cells in a 352-ball BGA package, at a competitive -09 speed grade, and rated for industrial temperatures from –40°C to +100°C. While the device has reached end-of-life status, it continues to power mission-critical industrial and communications applications worldwide, with authorized supply available through Rochester Electronics and major electronic component distributors.
Engineers sustaining existing designs — or those seeking reliable, high-density FPGA logic for proven applications — will find the XC4085XLA-09BG352I to be a dependable, well-supported component with an extensive history of deployment across industries.
