AMD XC4VLX25-11FFG676C

Overview

XC4VLX25-11FFG676C from AMD (formerly Xilinx) is a Virtex-4 LX family FPGA with 24,192 logic cells, 1.2 Mb of block RAM, and 192 DSP48 slices. It features SelectIO technology supporting LVDS, SSTL, HSTL, and GTL standards, and is packaged in a 676-pin Fine-Pitch Flip-Chip BGA (FFG676) with 0.8 mm pitch. It is used in high-performance digital signal processing and reconfigurable computing systems.

For engineers reviewing the XC4VLX25-11FFG676C datasheet, pinout, applications, or equivalent options, key selection criteria include logic density, embedded memory capacity, DSP slice count, I/O voltage flexibility, and timing grade (-11 speed grade).

Technical Context

The XC4VLX25-11FFG676C implements a hierarchical FPGA architecture with configurable logic blocks (CLBs), distributed RAM, and dedicated routing resources. It integrates 192 hard-wired 18×18-bit signed multipliers in DSP48 slices, supports up to 500 MHz system clocking via DCMs, and provides 448 user I/Os across 16 banks with independent VCCO and VREF per bank.

It includes dual-clock management (DCM) modules for phase shifting, frequency synthesis, and jitter reduction, and supports partial reconfiguration through configuration port access. The -11 speed grade guarantees worst-case propagation delay of 1.1 ns for CLB-to-CLB paths under industrial temperature conditions.

Key Specifications

Pinout & Package

XC4VLX25-11FFG676C is housed in a 676-ball Fine-Pitch Flip-Chip BGA (FFG676) package with 27×27 array, 0.8 mm ball pitch, and standard JEDEC MO-251AC footprint. Thermal and mechanical data confirm 2.0 W typical power dissipation at full utilization under industrial conditions.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC4VLX25-11FFG676C, the -10 variant trades speed for cost in legacy systems, while the VU9P offers generational scalability at the expense of PCB redesign, toolchain migration, and higher power consumption.

Availability

XC4VLX25-11FFG676C is available at Aetrix Electronics and suitable for radar signal processing, medical imaging backend systems, and industrial protocol gateway applications requiring stable component supply and long-term obsolescence management.

Supply support for XC4VLX25-11FFG676C 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 now develops adaptive computing platforms including FPGAs, ACAPs, and software tools for heterogeneous acceleration.

The Virtex-4 LX family was designed for high-density logic-intensive applications such as baseband processing, video encoding, and reconfigurable computing-prioritizing logic capacity, embedded memory, and I/O flexibility over hard IP.

FAQ

What is the maximum operating frequency supported by XC4VLX25-11FFG676C?

The XC4VLX25-11FFG676C supports a maximum DCM output frequency of 500 MHz and guarantees CLB-to-CLB propagation delays ≤1.1 ns at 85°C. Actual system clock rates depend on design placement, routing, and I/O standard selection-verified timing closure is achievable up to 320 MHz for fully pipelined datapaths.

Does XC4VLX25-11FFG676C include built-in transceivers for high-speed serial communication?

No, XC4VLX25-11FFG676C does not integrate RocketIO or any other high-speed serial transceiver. It relies on external PHY devices for protocols like Gigabit Ethernet or Serial RapidIO. This distinguishes it from Virtex-4 FX and SX families, which include multi-gigabit transceivers.

What configuration modes are supported by XC4VLX25-11FFG676C?

XC4VLX25-11FFG676C supports Master SelectMAP, Slave SelectMAP, and JTAG configuration modes. Bitstream loading can be initiated via PROM, microcontroller, or boundary-scan controller. Configuration data is loaded through dedicated CCLK, DIN, and INIT_B signals in parallel or serial fashion.

Is XC4VLX25-11FFG676C pin-compatible with other Virtex-4 LX devices in the same package?

XC4VLX25-11FFG676C shares the FFG676 package footprint with XC4VLX40, XC4VLX60, and XC4VLX80 in the same speed grade, but pin functions differ due to varying I/O counts and bank allocations. No pin-to-pin compatibility exists across density variants-each requires unique PCB layout and constraint files.

What is the recommended power supply sequencing for XC4VLX25-11FFG676C?

Per Xilinx UG070, VCCAUX must be powered before or simultaneously with VCCINT, and VCCO may be applied at any time. Recommended ramp times are <100 ms, with monotonic rise and no reverse bias. Decoupling requires 10 µF bulk + 0.1 µF ceramic per VCCINT/VCCAUX supply pin pair.