The XC4085XLA-O7BG432C is a high-density, high-performance Field Programmable Gate Array (FPGA) from Xilinx’s XC4000XLA family. Housed in a compact 432-pin BGA package, this device delivers 85,000 system gates with 7,448 logic cells on an advanced 0.35 µm CMOS process — making it a proven solution for legacy industrial systems, signal processing boards, telecommunications hardware, and long-lifecycle embedded designs.
Now supported under AMD’s Adaptive and Embedded Computing Group following AMD’s 2022 acquisition of Xilinx, the XC4085XLA series remains widely available through authorized distributors such as Rochester Electronics for continued production and MIL/COTS applications.
What Is the XC4085XLA-O7BG432C?
The XC4085XLA-O7BG432C belongs to Xilinx’s XC4000XLA/XV family — one of the most widely deployed legacy FPGA platforms in industrial and embedded history. The “O7” in the part number designates the speed grade, indicating the device’s timing performance tier, while BG432 identifies the 432-pin Ball Grid Array (BGA) package and C denotes commercial temperature range operation.
For engineers sourcing a Xilinx FPGA for sustained production or board-level replacement, this device offers full pin and footprint compatibility with other BG432-packaged XC4000XLA variants.
Key Features of the XC4085XLA-O7BG432C
- 85,000 system gates (up to ~55,000 usable gates in typical designs)
- 7,448 Configurable Logic Cells (CLBs)
- 0.35 µm advanced CMOS process for reduced power and improved routing
- 3.3V core and I/O supply voltage
- 432-pin BGA package — compact footprint for dense PCB designs
- IEEE 1149.1 JTAG boundary scan for in-system test and debugging
- Unlimited reprogrammability — supports flexible, iterative design changes
- On-chip RAM — dual-port and edge-triggered RAM via CLB resources
- FastCLK clock buffers — typically <1.5 ns clock delay for high-speed clocking
- Multiple global clock networks with BUFGE and BUFFCLK primitives
- RoHS compliant (Lead-Free)
XC4085XLA-O7BG432C Specifications Table
| Parameter |
Value |
| Part Number |
XC4085XLA-O7BG432C |
| Manufacturer |
Xilinx (AMD) |
| FPGA Family |
XC4000XLA |
| System Gates |
85,000 |
| Logic Cells (CLBs) |
7,448 |
| Process Technology |
0.35 µm CMOS |
| Supply Voltage (VCC) |
3.3V |
| Package |
432-Pin BGA (BG432) |
| Speed Grade |
-07 |
| Temperature Range |
Commercial (0°C to +85°C) |
| Configuration Interface |
Serial / Parallel / JTAG |
| IEEE Boundary Scan |
Yes (IEEE 1149.1) |
| RoHS Compliance |
Yes (Lead-Free) |
| Distributor (Rochester) |
XC4085XLA-09BG432C (comparable variant) |
XC4085XLA-O7BG432C vs. Other Speed Grades
The XC4085XLA is available in multiple speed grades. The table below compares common BG432-packaged variants to help engineers select the right performance tier.
| Part Number |
Speed Grade |
Max Frequency |
Package |
Gates |
| XC4085XLA-O7BG432C |
-07 (faster) |
~263 MHz |
BG432 |
85K |
| XC4085XLA-09BG432C |
-09 (standard) |
~227 MHz |
BG432 |
85K |
| XC4085XLA-08BG432C |
-08 (mid) |
~250 MHz |
BG432 |
85K |
Note: Lower speed grade numbers indicate faster devices in Xilinx’s naming convention. The -07 variant provides the highest performance among standard commercial BG432 options.
XC4085XLA-O7BG432C Pin and Package Information
| Package Attribute |
Detail |
| Package Type |
Ball Grid Array (BGA) |
| Total Pin Count |
432 |
| Package Code |
BG432 |
| User I/O Pins (typical) |
Up to 196 (varies by configuration) |
| PCB Mounting |
Surface Mount Technology (SMT) |
| Pitch |
1.0 mm (standard BGA pitch) |
Architecture: How the XC4085XLA Works
Configurable Logic Blocks (CLBs)
The core of the XC4085XLA is its 7,448 CLBs, each containing two independent 4-input function generators (Look-Up Tables). These function generators can be configured to implement any combinational logic function or used as distributed RAM. Integrated flip-flops in each CLB support sequential logic with set/reset control.
Routing Architecture
The XC4000XLA routing fabric provides abundant routing resources compared to earlier XC4000 variants. Dedicated carry logic chains allow efficient implementation of arithmetic functions, while hierarchical interconnect (single, double, and long lines) supports both local and global signal routing.
Clock Distribution
The device includes FastCLK buffers (typically <1.5 ns delay) and up to 8 global clock networks, making it suitable for multi-clock-domain designs. BUFGE and BUFFCLK primitives give designers precise control over clock topology.
Configuration Modes
| Configuration Mode |
Description |
| Master Serial |
FPGA drives configuration clock |
| Slave Serial |
External clock drives configuration |
| Slave Parallel |
Parallel byte-wide data loading |
| Boundary Scan (JTAG) |
IEEE 1149.1 in-system test |
| Daisy Chain |
Multiple FPGAs from a single PROM |
Typical Applications for XC4085XLA-O7BG432C
The XC4085XLA-O7BG432C is widely used in applications requiring high gate density, 3.3V operation, and long product lifecycle support:
| Industry |
Application Examples |
| Industrial Control |
PLC systems, motor controllers, motion control |
| Telecommunications |
Line cards, framing ICs, protocol bridges |
| Signal Processing |
FIR/IIR filters, FFT engines, data path control |
| Military / Defense |
Legacy board replacement, MIL-spec system sustainment |
| Embedded Systems |
Custom CPU/co-processor cores, bus interface logic |
| Test & Measurement |
Pattern generators, logic analyzers, protocol emulation |
| Automotive |
Infotainment clusters, legacy ECU logic replacement |
XC4085XLA-O7BG432C Ordering and Availability
The XC4085XLA-O7BG432C and its sister variants are stocked by authorized distributors including Rochester Electronics, which specializes in lifecycle and last-time-buy semiconductor support. Rochester Electronics is listed on DigiKey as the authorized source for the XC4085XLA-09BG432C (BG432, -09 speed grade).
When sourcing this device:
- Confirm the speed grade suffix matches your timing budget (-07 is faster than -09)
- Verify the package code (BG432 = 432-pin BGA)
- Request a Certificate of Conformance (CoC) from your distributor
- Inspect for counterfeit risk when purchasing from non-authorized channels
Frequently Asked Questions (FAQ)
What does “O7” mean in XC4085XLA-O7BG432C?
The “O7” (or “-07”) is the speed grade designation. In Xilinx’s XC4000XLA naming, lower numbers indicate faster timing. The -07 variant is faster than both -08 and -09 variants in the same family.
Is the XC4085XLA-O7BG432C compatible with the -09BG432C?
Yes. Both variants share the same 432-pin BGA package footprint and pinout, making them drop-in replacements from a PCB perspective, provided your timing constraints can accommodate the speed grade differences.
What tools are used to program the XC4085XLA-O7BG432C?
The XC4085XLA family is supported by Xilinx ISE Design Suite (the legacy toolchain for XC4000 devices). Vivado does not support this family. Configuration is loaded via JTAG, serial PROM (e.g., XC1700E series), or parallel interface.
Is the XC4085XLA still in production?
The XC4085XLA is considered a mature/legacy device. Rochester Electronics provides authorized lifetime supply, making it a reliable source for long-term production and repair applications.
What is the core voltage for the XC4085XLA-O7BG432C?
The device operates on a single 3.3V supply (VCC), which powers both the core logic and I/O banks. This distinguishes it from the earlier 5V XC4000E/X families.
Summary
The XC4085XLA-O7BG432C is a production-proven, high-density FPGA from Xilinx’s XC4000XLA family, offering 85K gates, 7,448 CLBs, and 3.3V operation in a 432-pin BGA package. With its -07 speed grade, it delivers the highest timing performance in the BG432 lineup, making it the preferred choice for demanding signal processing, telecom, and industrial control applications. Lifecycle support through Rochester Electronics ensures long-term availability for legacy system maintenance and board-level replacement.
