AMD XC4VLX40-12FF668C

Overview

XC4VLX40-12FF668C from AMD (formerly Xilinx) is a Virtex-4 LX family FPGA with 41,472 logic cells, 2.5 Gbps multi-gigabit transceivers, and embedded PowerPC 405 processor cores. It features 2,016 Kbits of block RAM, 128 DSP48 slices, and operates at -12 speed grade (1.25 ns CLB delay). It is used in high-performance digital signal processing and reconfigurable computing systems.

For engineers reviewing the XC4VLX40-12FF668C datasheet, pinout, applications, or equivalent options, key selection factors include I/O count (448 user I/Os), differential signaling support (LVDS, RSDS), thermal design power (12.3 W typical), and configuration interface (Master SelectMAP, JTAG).

Technical Context

The XC4VLX40-12FF668C implements a hierarchical FPGA architecture with configurable logic blocks (CLBs), distributed RAM, and dedicated routing resources. It supports multiple I/O standards including LVCMOS, LVTTL, HSTL, SSTL, and differential interfaces such as LVDS and RSDS.

This device integrates up to two PowerPC 405 hard-core processors, 128 DSP48 slices for arithmetic-intensive tasks, and 24 multi-gigabit transceivers capable of 622 Mbps–2.5 Gbps operation. Configuration is performed via internal configuration memory loaded through SelectMAP, serial PROM, or JTAG.

Key Specifications

Pinout & Package

XC4VLX40-12FF668C is housed in a 668-pin Fine-Pitch Flip-Chip Ball Grid Array (FF668) package with 35 mm × 35 mm body size and 1.0 mm ball pitch. Thermal and mechanical design requires controlled PCB stack-up and thermal vias under the die area.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar FPGA-based reconfigurable computing applications.

Compared with XC4VLX40-12FF668C, XC4VLX60-12FF668C offers more logic in identical packaging but increases power draw, while XC5VLX50T-1FF665C delivers architectural improvements and lower static power at the cost of migration effort and different pinout.

Availability

XC4VLX40-12FF668C is available at Aetrix Electronics and suitable for radar signal processing, medical imaging backend, and avionics data concentrator applications requiring stable component supply and long-term industrial lifecycle support.

Supply support for XC4VLX40-12FF668C 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

AMD acquired Xilinx in 2022 and continues development and support of the Virtex FPGA portfolio. Xilinx pioneered high-performance programmable logic solutions for demanding compute and signal processing markets.

The Virtex-4 LX family, including XC4VLX40-12FF668C, was designed for high-bandwidth, logic-intensive applications such as baseband wireless infrastructure, military radar, and scientific instrumentation.

FAQ

What is the maximum operating frequency of the XC4VLX40-12FF668C?

The XC4VLX40-12FF668C has a -12 speed grade, guaranteeing a 1.25 ns CLB propagation delay under worst-case voltage and temperature conditions. Its maximum system clock frequency depends on design implementation but typically reaches 500 MHz for well-constrained synchronous logic paths. The embedded PowerPC 405 cores operate up to 500 MHz, and transceivers support data rates up to 2.5 Gbps.

Does the XC4VLX40-12FF668C support partial reconfiguration?

Yes, the XC4VLX40-12FF668C supports partial reconfiguration through its configuration logic interface (ICAP) and dedicated bitstream framing. This allows dynamic replacement of functional modules without resetting the entire device. Partial reconfiguration is enabled using Xilinx ISE tools and requires specific floorplanning and bitstream generation workflows for the XC4VLX40-12FF668C.

What configuration modes does the XC4VLX40-12FF668C support?

The XC4VLX40-12FF668C supports Master SelectMAP, Slave SelectMAP, JTAG, and Serial PROM configuration modes. Master SelectMAP uses an internal oscillator to drive external PROM readout; JTAG enables boundary-scan testing and in-system programming. All modes are fully supported in Xilinx ISE 14.7 and compatible toolchains for the XC4VLX40-12FF668C.

Is the XC4VLX40-12FF668C RoHS compliant?

Yes, the XC4VLX40-12FF668C is RoHS-6 compliant (lead-free, mercury-free, cadmium-free, hexavalent chromium-free, PBB-free, PBDE-free) and meets JEDEC J-STD-020 moisture sensitivity level 3 (MSL3) requirements. The FF668 package uses matte tin finish on solder balls and complies with IPC/JEDEC J-STD-033 handling guidelines for the XC4VLX40-12FF668C.

What thermal management guidance applies to the XC4VLX40-12FF668C?

The XC4VLX40-12FF668C has a typical thermal design power (TDP) of 12.3 W and requires a thermal solution rated for ≥2.5°C/W junction-to-ambient. Recommended PCB layout includes ≥12 thermal vias under the die area, 2 oz copper planes, and a heatsink with forced airflow. Xilinx UG070 specifies thermal pad placement and solder mask opening dimensions specific to the XC4VLX40-12FF668C FF668 package.