AMD XC4085XLA-09BGG352C

Overview

XC4085XLA-09BGG352C from Xilinx is a high-capacity, 3.3 V low-voltage 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 352-pin BGA package. It supports synchronous system clock rates up to 80 MHz, includes edge-triggered and dual-port SelectRAM™, and targets PCI-compliant embedded control and data-path acceleration.

For engineers reviewing the XC4085XLA-09BGG352C datasheet, pinout, applications, or equivalent options, key selection criteria include its 0.35 µm SRAM process, 3.3 V core with 5 V-tolerant I/Os, CLB-level latch capability (XC4000X family), PCI compliance at -09 speed grade, and BGA-352 mechanical compatibility for legacy Xilinx FPGA upgrades.

Technical Context

The XC4085XLA-09BGG352C implements a regular array of Configurable Logic Blocks (CLBs) arranged in a 56×56 matrix, each containing dual 4-input function generators (F/G), a 3-input H generator, two storage elements configurable as D flip-flops or latches (XC4000X only), and dedicated carry logic. Its routing architecture includes enhanced vertical/horizontal interconnect lines, early-clock buffers for IOB fast capture, and eight global low-skew clock networks.

It uses a 0.35 µm SRAM process, operates at 3.3 V core voltage with 5 V-tolerant I/Os, and supports Master Parallel configuration with 22-bit addressing. The -09 speed grade guarantees PCI compliance and 80 MHz system clock operation, with internal performance exceeding 150 MHz. Input threshold is fixed at 1.6 V for 3.3 V CMOS/TTL compatibility.

Key Specifications

Pinout & Package

XC4085XLA-09BGG352C is housed in a 352-ball fine-pitch Ball Grid Array (BGA) package (Xilinx designation BGG352), with 448 user I/Os distributed across peripheral rows and corners. Pin functions follow Xilinx XC4000X family conventions: dedicated global clock inputs (GCLK0–GCLK7), configuration pins (INIT, PROGRAM, CCLK, DIN, DONE), JTAG boundary-scan (TCK/TMS/TDI/TDO), and dual-purpose I/O banks supporting programmable slew rate and pull-up/pull-down resistors.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC4085XL-09BG352C, the XC4085XLA-09BGG352C adds critical XC4000X routing and IOB features essential for PCI timing closure and high-speed capture; versus XCV1000E-8BG560C, it trades modern process and density for drop-in compatibility with legacy 3.3 V systems and existing BGA-352 layouts.

Availability

XC4085XLA-09BGG352C is available at Aetrix Electronics and suitable for industrial control, aerospace telemetry, and legacy FPGA upgrade programs requiring stable component supply and long-term obsolescence mitigation.

Supply support for XC4085XLA-09BGG352C 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 FPGAs and developed the XC4000 family as the industry's first high-density, SRAM-based programmable logic platform.

The XC4000X series-including XC4085XLA-09BGG352C-was engineered for high-performance embedded systems requiring PCI compliance, on-chip synchronous RAM, and field-upgradable logic in 3.3 V environments.

FAQ

What is the core voltage requirement for XC4085XLA-09BGG352C?

The XC4085XLA-09BGG352C requires a nominal 3.3 V core supply (V_CCINT) with ±0.3 V tolerance. Its I/O banks support 3.3 V LVTTL/LVCMOS operation and are 5 V tolerant, enabling direct connection to legacy peripherals without level-shifting circuitry. This dual-voltage capability is integral to the XC4000XLA family's design for mixed-signal and upgrade applications.

Is XC4085XLA-09BGG352C pin-compatible with other XC4000X devices?

Yes, XC4085XLA-09BGG352C is pinout-compatible with other XC4000X devices in the BGG352 package, including XC4085XL-09BG352C. However, it is not bitstream-compatible with XC4000 or XC4000E families due to architectural differences in routing resources and CLB functionality. Pin compatibility enables PCB reuse, but configuration files must be regenerated for XC4000X-specific features.

Does XC4085XLA-09BGG352C support JTAG boundary scan?

Yes, XC4085XLA-09BGG352C includes IEEE 1149.1-compliant boundary scan logic with dedicated TCK, TMS, TDI, and TDO pins. This enables in-system testing, device programming, and visibility into internal node states during debug-critical for validating complex logic implementations and verifying interconnect integrity on densely routed boards.

What configuration modes does XC4085XLA-09BGG352C support?

XC4085XLA-09BGG352C supports Master Serial, Slave Serial, Master Parallel, and Slave Parallel configuration modes. Its Master Parallel mode extends addressing to 22 bits-required for configuring large XC4000X devices from external PROMs exceeding 256 KB. Configuration data is loaded into internal SRAM cells, enabling unlimited reprogramming and dynamic partial reconfiguration.

How does the SelectRAM™ feature in XC4085XLA-09BGG352C improve system design?

The SelectRAM™ feature in XC4085XLA-09BGG352C provides per-CLB configurable RAM blocks (16×2, 32×1, or 16×1 dual-port) with edge-triggered write capability. This eliminates external SRAM for FIFOs, lookup tables, and state buffers-reducing component count, board area, and signal routing complexity while guaranteeing sub-ns read access times synchronized to the FPGA's internal clock domain.