AMD XC4085XLA-08BG432C

Overview

XC4085XLA-08BG432C from Xilinx is a high-capacity, 3.3 V low-voltage Field-Programmable Gate Array (FPGA) featuring 7,448 logic cells, 85,000 usable gates, 100,352 RAM bits, and 448 user I/Os in a 432-pin Ball Grid Array (BGA) package. It supports synchronous system clock rates up to 80 MHz, includes edge-triggered and dual-port SelectRAM™ memory per CLB, and implements IEEE 1149.1 boundary scan for testability - deployed in legacy PCI-compliant embedded control and reconfigurable digital signal processing systems.

For engineers reviewing the XC4085XLA-08BG432C datasheet, pinout, applications, or equivalent options, key selection criteria include confirmed 3.3 V operation with 5 V-tolerant I/Os, CLB-level RAM configurability (16×1 dual-port / 32×1 single-port), latch-capable storage elements, and master parallel configuration with 22-bit addressing - all validated for XC4000XLA family documentation.

Technical Context

The XC4085XLA-08BG432C implements a hierarchical interconnect architecture with twenty-two additional vertical and twelve horizontal routing lines per CLB row/column, including quad-line repowering buffers for high-speed paths. Its CLBs integrate three function generators (F, G, H) supporting up to nine-variable logic, programmable flip-flops or latches (XC4000XLA-specific), and dedicated carry logic with >50% reduced TBYP delay versus XC4000.

Each IOB provides individually configurable slew rate, input pull-up/pull-down resistors, and a fast capture latch driven by early-clock buffers - enabling precise timing alignment between input data sampling and global clock domains. The device uses 0.35 µm SRAM process technology and supports soft start-up to mitigate ground bounce during power-on configuration.

Key Specifications

Pinout & Package

XC4085XLA-08BG432C is housed in a 432-ball fine-pitch BGA (FBGA) package with 1.27 mm ball pitch and 35 mm × 35 mm body size. Pin assignments follow Xilinx's standard XC4000XLA pinout layout, optimized for signal integrity and thermal dissipation in high-density PCBs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar FPGA-based logic integration applications.

Compared with XC4085XLA-08BG432C, XC4085XL-08BG432C offers identical footprint and basic functionality but omits latch-mode CLBs and extended configuration addressing - making it suitable only for non-reconfigurable, timing-static applications. XCV1000E-8BG560C delivers 2× logic density and superior speed but requires PCB redesign due to different package and voltage requirements.

Availability

XC4085XLA-08BG432C is available at Aetrix Electronics and suitable for legacy PCI interface design, industrial protocol bridging, reconfigurable DSP acceleration, and field-upgradable communication gateway development requiring stable component supply across long-life production cycles.

Supply support for XC4085XLA-08BG432C 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, Inc. was a pioneering developer of programmable logic devices, founded in 1984 and acquired by AMD in 2022. It specialized in FPGAs, SoCs, and adaptive compute acceleration platforms.

The XC4000XLA family was designed specifically for high-performance, low-voltage (3.3 V) reconfigurable logic in PCI-compliant and industrial control applications - emphasizing on-chip memory flexibility, I/O voltage tolerance, and timing predictability.

FAQ

What is the maximum system clock frequency supported by XC4085XLA-08BG432C?

The XC4085XLA-08BG432C supports synchronous system clock rates up to 80 MHz, with internal performance exceeding 150 MHz for pipelined logic paths. This rating applies to the -08 speed grade and assumes proper PCB layout, decoupling, and termination. Actual achievable frequency depends on design complexity, routing congestion, and temperature conditions - verified through Xilinx Foundation or Alliance software timing analysis.

Does XC4085XLA-08BG432C support dual-port RAM functionality?

Yes, XC4085XLA-08BG432C supports dual-port RAM within each CLB: two 16×1 function generators can be jointly configured as a single 16×1 dual-port RAM with independent read and write ports. This enables true simultaneous read/write operations at the same or different addresses - critical for high-throughput FIFOs and buffer management in communication subsystems.

Is XC4085XLA-08BG432C pin-compatible with other XC4000X series devices?

XC4085XLA-08BG432C is pinout-compatible with other XC4000XLA and XC4000XL devices in the same 432-ball BGA package (e.g., XC4085XL-08BG432C), but not with XC4000E or XC4000 families. Pin compatibility enables mechanical and layout reuse, though functional differences - such as latch-capable CLBs and 22-bit master parallel addressing - require bitstream and configuration mode validation.

What configuration modes does XC4085XLA-08BG432C support?

XC4085XLA-08BG432C supports Master Serial, Master Parallel, Slave Serial, Slave Parallel, and JTAG (boundary scan) configuration modes. The Master Parallel mode includes 22-bit addressing - essential for daisy-chaining multiple large XC4000XLA devices using high-capacity PROMs. Configuration data is loaded into internal SRAM cells and is volatile; external nonvolatile memory is required for power-up initialization.

Can XC4085XLA-08BG432C interface directly with 5 V logic components?

Yes, XC4085XLA-08BG432C features 5 V-tolerant I/Os: all user I/O pins accept 5 V input signals while operating at 3.3 V V_CCO, eliminating the need for external level shifters. This capability is enabled by internal clamp diodes and robust input protection structures - validated across commercial temperature range and compliant with JEDEC JESD8-6 standards.