AMD XC6SLX45-3FG484I

Overview

XC6SLX45-3FG484I from AMD (formerly Xilinx) is a Spartan-6 FPGA featuring 43,661 logic cells, 2,184 Kbits of block RAM, and 180 DSP48A1 slices, configured in a 484-pin Fine-Pitch Ball Grid Array (FBGA) package with industrial temperature range (–40°C to +100°C). It serves as a reconfigurable logic fabric for embedded vision preprocessing, motor control sequencing, and industrial I/O bridging.

For engineers reviewing the XC6SLX45-3FG484I datasheet, pinout, applications, or equivalent options, key selection criteria include I/O count (348 user I/Os), speed grade (-3 = highest performance in Spartan-6 family), LVDS/PCIe Gen1-capable transceivers, and support for JTAG boundary-scan and ICAP configuration interfaces.

Technical Context

The XC6SLX45-3FG484I implements a hierarchical FPGA architecture with configurable logic blocks (CLBs), distributed RAM, shift registers, and dedicated carry chains. It integrates six clock management tiles (CMTs), each containing a DCM and PLL, supporting phase-matched clock synthesis and jitter reduction across multiple domains.

Configuration is supported via Master SPI, Slave Serial, or JTAG modes using external PROM or processor-controlled ICAP. The device supports partial reconfiguration and bitstream encryption using AES-256 keys loaded through on-chip battery-backed RAM or external eFUSE.

Key Specifications

Pinout & Package

XC6SLX45-3FG484I is housed in a 23×23 mm, 484-ball fine-pitch BGA (FG484) package with 0.8 mm ball pitch and standard I/O pad arrangement. Thermal pad is exposed on underside for enhanced heat dissipation in sustained logic operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC6SLX45-3FG484I, the XC6SLX45-2FG484C trades industrial temperature tolerance and maximum clock frequency for lower unit cost, while the XC7S50-2CSG324C offers architectural upgrades at the expense of legacy Spartan-6 design compatibility and PCIe endpoint integration.

Availability

XC6SLX45-3FG484I is available at Aetrix Electronics and suitable for industrial motor control, embedded vision preprocessing, and programmable I/O gateway applications requiring stable component supply over extended product lifecycles.

Supply support for XC6SLX45-3FG484I 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, adaptive SoCs, and AI accelerators for data center, edge, and embedded markets.

The Spartan-6 family, including XC6SLX45-3FG484I, was designed for cost-sensitive, high-volume applications demanding reliable reconfigurable logic with integrated memory controllers and industrial-grade reliability.

FAQ

What is the maximum supported DDR3 data rate for XC6SLX45-3FG484I?

The XC6SLX45-3FG484I supports DDR3 memory interfaces up to 800 Mbps (400 MHz clock) using its hard memory controller. This capability is validated in Xilinx UG388 and applies specifically to the -3 speed grade under industrial temperature conditions. System-level timing closure requires careful PCB layout and termination matching for the XC6SLX45-3FG484I DDR3 interface.

Does XC6SLX45-3FG484I include built-in PCIe Gen1 endpoint functionality?

Yes, XC6SLX45-3FG484I integrates a hard PCIe Gen1 x1 endpoint block compliant with PCI Express Base Specification v1.1. This dedicated IP reduces logic utilization and improves timing predictability compared to soft-core PCIe implementations. The block supports configuration space access, memory-mapped I/O, and MSI interrupts for host communication in XC6SLX45-3FG484I-based designs.

How many configuration modes does XC6SLX45-3FG484I support?

XC6SLX45-3FG484I supports three primary configuration modes: Master SPI (default), Slave Serial, and JTAG. Mode selection is controlled by M[2:0] pins at power-up. Additionally, ICAP (Internal Configuration Access Port) enables runtime partial reconfiguration, allowing dynamic logic updates without resetting the entire XC6SLX45-3FG484I device.

What is the purpose of the INIT_B pin on XC6SLX45-3FG484I?

The INIT_B pin on XC6SLX45-3FG484I signals configuration status: it remains Low during power-on reset and pulls High after successful bitstream loading or enters High-Z state upon completion. If CRC errors occur during configuration, INIT_B asserts Low again. This pin provides hardware visibility into XC6SLX45-3FG484I configuration health for system-level fault detection and recovery.

Can XC6SLX45-3FG484I perform partial reconfiguration?

Yes, XC6SLX45-3FG484I supports partial reconfiguration through its ICAP interface, enabling selective logic module updates while the rest of the design remains operational. This feature requires specific HDL partitioning and bitstream generation workflows in Vivado Design Suite. Partial reconfiguration is commonly used in XC6SLX45-3FG484I-based test equipment to swap waveform generation modules without interrupting system timing.