The XC4085XLA-09HQ208C is a high-performance field-programmable gate array (FPGA) from the Xilinx XC4000XLA family, distributed by Rochester Electronics. Designed for demanding logic applications, this device offers 85,000 system gates in a compact 208-pin HQFP package. Whether you are working on telecommunications, industrial control, or embedded processing systems, the XC4085XLA-09HQ208C delivers the programmable logic performance your design requires.
If you are sourcing or evaluating Xilinx FPGA solutions for your project, this guide covers everything you need to know — from technical specifications and pin configurations to application use cases and ordering details.
What Is the XC4085XLA-09HQ208C?
The XC4085XLA-09HQ208C is part of Xilinx’s XC4000XLA (Extended Low-power Architecture) series — a mature and proven FPGA platform widely used across aerospace, defense, industrial, and communications applications. The “XLA” designation indicates an advanced low-voltage, low-power variant of the classic XC4000 architecture, optimized for 3.3V operation.
Rochester Electronics, the authorized distributor and manufacturer of this component, ensures full lifecycle supply and traceability for customers requiring long-term support.
Key Features of the XC4085XLA-09HQ208C
- 85,000 system gates for high-density logic integration
- 3.3V operation with 5V-tolerant I/O inputs
- 208-pin HQFP (Plastic Quad Flat Package) surface-mount package
- -09 speed grade — 9 ns propagation delay
- Configurable Logic Blocks (CLBs) with flip-flops and LUTs
- On-chip RAM for embedded data storage
- Boundary scan (JTAG) support per IEEE 1149.1 standard
- SelectRAM technology for flexible on-chip memory
- Wide fanout and distributed routing resources
- Commercial temperature range (0°C to +85°C)
XC4085XLA-09HQ208C Technical Specifications
General Specifications
| Parameter |
Value |
| Manufacturer / Brand |
AMD / Xilinx (via Rochester Electronics) |
| Part Number |
XC4085XLA-09HQ208C |
| Product Series |
XC4000XLA |
| Package Type |
HQFP (208-pin) |
| Mounting Type |
Surface Mount |
| Supply Voltage (VCC) |
3.3V |
| Speed Grade |
-09 (9 ns) |
| System Gate Count |
~85,000 |
| Temperature Range |
0°C to +85°C (Commercial) |
| RoHS Status |
Not specified (legacy device) |
Logic Architecture Specifications
| Feature |
Details |
| Logic Cells / CLBs |
High density CLB array |
| LUT Size |
4-input Look-Up Tables (LUTs) |
| Flip-Flops |
D-type flip-flops per CLB slice |
| On-Chip RAM |
SelectRAM (distributed and block) |
| I/O Standards |
5V tolerant TTL/LVTTL |
| Configuration Interface |
Serial (Slave/Master), Parallel |
| JTAG Support |
Yes – IEEE 1149.1 Boundary Scan |
| Clock Resources |
Multiple global clock buffers |
Package & Pin Specifications
| Parameter |
Value |
| Package Code |
HQ208C |
| Package Style |
Plastic HQFP (Quad Flat Pack) |
| Pin Count |
208 |
| User I/O Pins |
Up to 160 (typical) |
| Pitch |
0.5 mm |
| Body Size |
28 mm × 28 mm |
| Lead Finish |
Tin/Lead (SnPb) |
Electrical Characteristics
| Parameter |
Min |
Typical |
Max |
Unit |
| Supply Voltage (VCCINT) |
3.0 |
3.3 |
3.6 |
V |
| Input High Voltage (VIH) |
2.0 |
— |
5.5 |
V |
| Input Low Voltage (VIL) |
–0.5 |
— |
0.8 |
V |
| Output High Voltage (VOH) |
2.4 |
— |
— |
V |
| Output Low Voltage (VOL) |
— |
— |
0.4 |
V |
| Standby Current (ICC) |
— |
— |
TBD |
mA |
| Operating Frequency |
— |
— |
100+ |
MHz |
Part Number Decoder: Understanding XC4085XLA-09HQ208C
Understanding the part number helps engineers confirm compatibility and order the correct variant.
| Segment |
Meaning |
| XC |
Xilinx FPGA device |
| 4085 |
85,000 system gates in the XC4000 family |
| XLA |
Extended Low-power Architecture (3.3V core) |
| -09 |
Speed grade: 9 ns propagation delay |
| HQ |
Package type: Plastic HQFP |
| 208 |
Pin count: 208 pins |
| C |
Temperature range: Commercial (0°C to +85°C) |
XC4085XLA-09HQ208C vs. Similar Xilinx FPGA Variants
| Part Number |
Gates |
Speed Grade |
Package |
Voltage |
| XC4085XLA-09HQ208C |
~85K |
-09 |
HQFP-208 |
3.3V |
| XC4085XLA-08HQ208C |
~85K |
-08 (faster) |
HQFP-208 |
3.3V |
| XC4062XLA-09HQ208C |
~62K |
-09 |
HQFP-208 |
3.3V |
| XC4085XL-09HQ208C |
~85K |
-09 |
HQFP-208 |
3.3V (XL) |
| XC4085XLA-09PQ208C |
~85K |
-09 |
PQFP-208 |
3.3V |
Note: XLA variants offer improved low-power characteristics compared to standard XL devices, making them preferred for battery-sensitive and thermally constrained designs.
Typical Applications
The XC4085XLA-09HQ208C is well-suited for a wide range of embedded and digital logic applications:
#### Industrial Automation
Complex state machines, motion control logic, and real-time sensor data processing benefit from the device’s high gate count and configurable I/O.
#### Telecommunications & Networking
Protocol handling, data framing, and FIFO buffering in line-card applications where 3.3V LVTTL-compatible I/O is standard.
#### Military & Aerospace (COTS Replacement)
Rochester Electronics provides full traceability and lifecycle documentation, making this device suitable for programs requiring long-term component availability and authentic sourcing.
#### ASIC Prototyping
Designers use the XC4085XLA to prototype ASIC logic before committing to silicon, leveraging its large gate count and fast configuration.
#### Embedded Processing Systems
Glue logic, bus bridging, interrupt controllers, and peripheral decode logic in embedded microprocessor systems.
Configuration Modes
The XC4085XLA-09HQ208C supports several FPGA configuration modes, allowing flexible integration into system designs:
| Configuration Mode |
Description |
| Master Serial |
FPGA clocks external serial PROM |
| Slave Serial |
External controller provides configuration clock |
| Slave Parallel |
Byte-wide parallel configuration (faster load) |
| Boundary Scan (JTAG) |
IEEE 1149.1 test and configuration via JTAG port |
Configuration data is stored externally in a serial or parallel EEPROM/Flash device and loaded at power-on or on demand.
Why Choose Rochester Electronics for XC4085XLA-09HQ208C?
Rochester Electronics is an authorized distributor and manufacturer for Xilinx (now AMD) devices, providing:
- 100% authorized supply chain — no counterfeit risk
- Full component traceability — critical for defense and aerospace programs
- Long-term availability — lifecycle support for obsolete or end-of-life Xilinx parts
- Certificate of Conformance available on request
- Technical support for design-in and qualification needs
For engineers working on legacy system upgrades or new designs requiring proven FPGA technology, Rochester Electronics ensures authentic, traceable XC4085XLA-09HQ208C supply.
Ordering Information
| Attribute |
Details |
| Part Number |
XC4085XLA-09HQ208C |
| Manufacturer |
AMD / Xilinx |
| Authorized Distributor |
Rochester Electronics LLC |
| DigiKey Part Number |
Available via DigiKey Marketplace |
| Minimum Order Quantity |
Contact distributor |
| Lead Time |
Contact distributor for stock availability |
| Packaging |
Tray / Tube (surface-mount HQFP) |
Frequently Asked Questions (FAQ)
Q: Is the XC4085XLA-09HQ208C still in production? A: The XC4000XLA series is considered a mature/legacy product line. Rochester Electronics provides authorized continued supply of the XC4085XLA-09HQ208C for programs requiring long-term availability.
Q: What is the difference between XC4085XLA and XC4085XL? A: The XLA variant features enhanced low-power architecture with improved standby current characteristics compared to the standard XL variant, while maintaining pin and functional compatibility.
Q: Can I use XC4085XLA-09HQ208C in a 5V system? A: The device operates on a 3.3V core supply, but the I/O pins are 5V-tolerant for inputs, making it compatible with 5V TTL-level systems. Output voltages are LVTTL (3.3V) levels.
Q: What software tools support the XC4085XLA? A: Xilinx ISE Design Suite (Foundation or Classic editions) supports XC4000XLA family programming and timing analysis. Note that Xilinx Vivado does not support legacy XC4000-series devices.
Q: Is JTAG boundary scan supported? A: Yes. The XC4085XLA-09HQ208C fully supports IEEE 1149.1 JTAG boundary scan for board-level testing and in-system programming.
Summary
The XC4085XLA-09HQ208C is a proven, high-density 85K-gate FPGA in a 208-pin HQFP package, offering 3.3V low-power operation, 9 ns speed grade performance, and broad I/O compatibility. Distributed by Rochester Electronics with full lifecycle traceability, it remains a reliable choice for legacy system maintenance, ASIC prototyping, industrial control, and defense electronics. Its configurable architecture, JTAG support, and flexible configuration modes make it a versatile solution across demanding engineering applications.
For broader Xilinx programmable logic options and design resources, explore our complete Xilinx FPGA product range.
