AMD XC6SLX45-N3CSG324C

Overview

XC6SLX45-N3CSG324C from AMD (formerly Xilinx) is a Spartan-6 FPGA with 43,661 logic cells, 2.1 Mb of block RAM, and 186 DSP48A1 slices, configured in a 324-pin CSBGA package with -3 speed grade and commercial temperature range (0°C to 85°C). It targets mid-range embedded control, industrial I/O bridging, and video interface logic.

For engineers reviewing the XC6SLX45-N3CSG324C datasheet, pinout, applications, or equivalent options, key selection factors include I/O count (232 user I/Os), LVDS support, single-ended signaling compatibility, and configuration via SPI/BPI/JTAG interfaces.

Technical Context

The XC6SLX45-N3CSG324C implements a hierarchical FPGA architecture with configurable logic blocks (CLBs), distributed RAM, shift registers, and dedicated carry logic. It supports SelectIO standards including LVCMOS, LVTTL, LVDS, and SSTL, with programmable slew rate and drive strength per bank.

Configuration is performed through Master SPI, Slave Serial, or JTAG modes; startup options include mode pin selection and internal oscillator-based delay. The device integrates clock management using DCMs (Digital Clock Managers) for frequency synthesis, phase shifting, and duty cycle correction across up to eight independent clocks.

Key Specifications

Pinout & Package

XC6SLX45-N3CSG324C uses a 324-pin Fine-Pitch CSP Ball Grid Array (CSBGA) with 19 × 19 ball arrangement, 0.8 mm pitch, and thermal pad on underside. Pinout follows Xilinx Spartan-6 pinout standard for SG324 package; I/O banks are organized in four quadrants with dedicated configuration, clock, and JTAG pins.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar FPGA logic and I/O expansion applications.

Compared with XC6SLX45-N3CSG324C, XC6SLX45-3FGG484C offers higher I/O count but requires PCB redesign, while XC6SLX25-N3CSG324C delivers identical packaging and pin compatibility at lower logic capacity-making it a true layout-conserving alternative for scaled-down implementations.

Availability

XC6SLX45-N3CSG324C is available at Aetrix Electronics and suitable for industrial automation, medical display subsystems, and automated test equipment requiring stable component supply over extended production lifecycles.

Supply support for XC6SLX45-N3CSG324C 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, MPSoCs, and ACAPs for data center, AI, and embedded markets.

The Spartan-6 family was originally designed by Xilinx for cost-sensitive, high-volume applications demanding low power, small footprint, and reliable I/O interfacing-targeting industrial control, consumer video, and communications infrastructure.

FAQ

What is the maximum supported DDR3 memory interface speed for XC6SLX45-N3CSG324C?

The XC6SLX45-N3CSG324C supports DDR3 SDRAM interfaces up to 667 Mbps data rate (333 MHz clock) when used with the -3 speed grade and appropriate PCB layout. This capability relies on calibrated I/O timing, proper termination, and DCM-based clock deskew. XC6SLX45-N3CSG324C does not include hardened memory controller IP; implementation requires Xilinx MIG v3.7 or later with manual constraint tuning.

Does XC6SLX45-N3CSG324C include built-in transceivers for high-speed serial protocols?

No, XC6SLX45-N3CSG324C does not integrate multi-gigabit transceivers. It belongs to the Spartan-6 LX series, which lacks high-speed serial I/O. All I/Os are limited to LVDS (840 Mbps) and single-ended standards. For PCIe, SATA, or Gigabit Ethernet, external PHYs or soft-core solutions must be implemented in XC6SLX45-N3CSG324C logic fabric.

Can XC6SLX45-N3CSG324C be configured using a microcontroller over SPI?

Yes, XC6SLX45-N3CSG324C supports Master SPI configuration mode, allowing a host microcontroller to load bitstream from external SPI flash. The FPGA initiates read cycles automatically after power-up when M0–M2 pins are set to 001. XC6SLX45-N3CSG324C requires no firmware driver beyond standard SPI byte writes; configuration status is monitored via INIT_B and DONE pins.

What is the purpose of the VCCAUX supply pin on XC6SLX45-N3CSG324C?

VCCAUX supplies 2.5 V to internal configuration circuitry, DCMs, and certain I/O input buffers in XC6SLX45-N3CSG324C. It must be decoupled with ≥10 µF ceramic capacitance and regulated within ±3% tolerance. Failure to maintain stable VCCAUX causes configuration failures or DCM unlock events, even if VCCINT and VCCO rails are nominal. XC6SLX45-N3CSG324C has dedicated VCCAUX pins (e.g., C13, D14) requiring separate power plane routing.

Is XC6SLX45-N3CSG324C compatible with Xilinx Vivado Design Suite?

No, XC6SLX45-N3CSG324C is not supported in Vivado. It requires Xilinx ISE Design Suite 14.7 as the final official toolchain. Vivado dropped Spartan-6 support after version 2013.4. XC6SLX45-N3CSG324C bitstreams generated in ISE 14.7 remain functional indefinitely, but no new features, IP updates, or OS compatibility patches are provided beyond that release.