AMD XC4085XLA-09HQ208C

Overview

XC4085XLA-09HQ208C from Xilinx is a high-capacity, 3.3 V Field-Programmable Gate Array (FPGA) featuring 7,448 logic cells, 55,000–180,000 typical gate range, 100,352 on-chip RAM bits, and 448 user I/Os in a 208-pin HQFP package. It implements synchronous dual-port and edge-triggered RAM per CLB, supports PCI-compliant operation at up to 80 MHz system clock rate, and targets high-density digital logic integration in embedded control and communications interfaces.

For engineers reviewing the XC4085XLA-09HQ208C datasheet, pinout, applications, or equivalent options, this device requires verification of CLB-level RAM configuration modes, IOB slew-rate programmability, global clock network routing constraints, and Master Parallel configuration addressing (22-bit) for large-system deployment.

Technical Context

The XC4085XLA-09HQ208C belongs to the XC4000XLA family - a low-voltage, 3.3 V extension of the XC4000X series built on 0.35 µm SRAM process. It features configurable CLBs with three function generators (F/G/H), dual flip-flops or latches per CLB, and dedicated carry logic enabling >150 MHz internal performance.

Its IOBs support individually programmable output slew rate, 5 V-tolerant I/Os, and input thresholds compatible with both 3.3 V CMOS and TTL levels (1.6 V threshold). Configuration is performed via Master Parallel mode using 22-bit addressing, and it includes IEEE 1149.1 boundary scan logic for testability.

Key Specifications

Pinout & Package

XC4085XLA-09HQ208C is housed in a 208-pin High-Performance Quad Flat Package (HQFP), measuring 28 mm × 28 mm with 0.5 mm pitch. This thermally enhanced, lead-free-compatible package supports high I/O density and signal integrity for complex board layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar FPGA applications.

Compared with XC4085XLA-09HQ208C, the XC4085XL-09HQ208C offers identical functionality at higher static power, while the XCV1000E-8HQ240C provides architectural evolution - not compatibility - with greater logic density, modern I/O standards, and no 5 V tolerance.

Availability

XC4085XLA-09HQ208C is available at Aetrix Electronics and suitable for PCI interface development, high-speed data acquisition systems, and legacy ASIC replacement programs requiring stable component supply and long-term obsolescence management.

Supply support for XC4085XLA-09HQ208C includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Xilinx, now part of AMD, pioneered commercial FPGA technology and developed the XC4000 family as the industry's first high-density, SRAM-based programmable logic platform.

The XC4000XLA product line was engineered for low-voltage, high-reliability embedded systems requiring 3.3 V operation, 5 V-tolerant I/Os, and deterministic timing - especially in industrial control and communications infrastructure.

FAQ

What is the maximum system clock frequency supported by XC4085XLA-09HQ208C?

The XC4085XLA-09HQ208C supports synchronous system clock rates up to 80 MHz and achieves internal performance exceeding 150 MHz. This speed grade (-09) meets full PCI 2.1 compliance requirements and is validated under worst-case voltage and temperature conditions specified in the official Xilinx data sheet.

Does XC4085XLA-09HQ208C support dual-port RAM functionality?

Yes, XC4085XLA-09HQ208C supports dual-port RAM within each CLB - configured as a 16x1 block with independent read and write ports. This enables true simultaneous read/write operations, which is essential for FIFOs, buffer management, and real-time data streaming applications.

Is XC4085XLA-09HQ208C pin-compatible with other XC4000X devices?

XC4085XLA-09HQ208C is pinout-compatible with XC4085XL-09HQ208C and other XC4000X-series devices in the same 208-pin HQFP package. However, it is not bitstream-compatible with XC4000 or XC4000E families due to architectural enhancements including expanded routing and new CLB features.

What configuration modes does XC4085XLA-09HQ208C support?

XC4085XLA-09HQ208C supports Master Parallel configuration as its primary mode, requiring a 22-bit address PROM. It also supports Slave Serial, Slave Parallel, and JTAG boundary scan modes. The 22-bit addressing extends beyond XC4000E's 18-bit limit to accommodate larger bitstreams.

Can XC4085XLA-09HQ208C interface directly with 5 V logic components?

Yes, XC4085XLA-09HQ208C features 5 V-tolerant I/Os across all banks. Its inputs accept 5 V signals safely while operating from a 3.3 V supply, eliminating the need for external level shifters in mixed-voltage systems such as industrial controllers interfacing with legacy peripherals.