FPGA & adaptive SoC databook · online editionRev. 2026.10

XC6SLX75T

AMDSpartan-6

The XC6SLX75T is a Spartan-6 FPGA from AMD, built on a 45 nm process. It provides 46,648 LUT6 look-up tables (74,637 logic cells), 93,296 flip-flops, 3 Mb of block RAM and 132 DSP48A1 slices. It offers up to 348 user I/O pins and 8 GTP transceivers at up to 3.2 Gb/s, with hard PCI Express Gen1 x1 blocks. It is available in 3 packages, from the CSG484 (19 × 19 mm) to the FGG676 (27 × 27 mm). Temperature grades: commercial, industrial. Designs are built with AMD ISE Design Suite.

46,648LUTs (LUT6)
132DSP48A1 slices
3 MbBlock RAM
348Max. user I/O
8Transceivers (3.2 Gb/s)

Specifications

VendorAMD
FamilySpartan-6
Series6 Series
Process45 nm
Configuration memorySRAM
Look-up tables (LUT6)46,648
   Logic block6-input look-up table, fracturable into two LUT5 with shared inputs
LUT4 equivalent (approx.)≈74,637
Logic cells74,637
Flip-flops93,296
Distributed RAM692 Kb
Block RAM3 Mb (172 × 18 Kb)
DSP (DSP48A1 slice)132
Clock management tiles6
Max. user I/O348
GTP transceivers8 × 3.2 Gb/s
PCI Express Gen1 x1
Hard memory controller4 × MCB (DDR/DDR2/DDR3/LPDDR)
Analog / monitorNone
Design toolAMD ISE Design Suite

Packages

PackageSize (mm)Pitch (mm)User I/OTransceivers
FGG48423 × 231.02684
CSG48419 × 190.82924
FGG67627 × 271.03488

Package names are shown as in the selection guide; the full ordering code adds speed grade and temperature (see the data sheet).

Speed and temperature grades

Temperature gradeJunction rangeSpeed grades
Commercial (C)0 to 85 °C-3, -3N, -2
Industrial (I)−40 to 100 °C-3, -3N, -2

Alternatives to the XC6SLX75T

Closest matches in other families and vendors by logic, DSP, memory, I/O and transceivers. Check pin compatibility and tools before migrating.

DeviceLUTsVendor logicDSPBlock RAMMax I/OTransceiversPCIeCoreScore
XC7A75TAMD Artix-747,200 LUT675.5K LC1803.7 Mb3008 GTP 6.6 Gb/sGen2—
LFE3-70EALattice LatticeECP367,000 LUT4—1284.3 Mb49012 SERDES 3.2 Gb/s——
5CGXC5Altera Cyclone V29,080 ALMs77K LE1504.4 Mb3366 XCVR 3.125 Gb/sGen1—
5CGTD5Altera Cyclone V29,080 ALMs77K LE1504.4 Mb3366 XCVR 6.144 Gb/sGen2—
LFE5UM-85Lattice ECP584,000 LUT4—1563.7 Mb3654 SERDES 3.2 Gb/s——
LFE5UM5G-85Lattice ECP584,000 LUT4—1563.7 Mb3654 SERDES 5 Gb/s——

Compare side by side: XC6SLX75T vs XC7A75T, XC6SLX75T vs LFE3-70EA, XC6SLX75T vs 5CGXC5, XC6SLX75T vs LFE5UM-85, XC6SLX75T vs LFE5UM5G-85.

Compare the XC6SLX75T with up to three other FPGAs.

XC6SLX75T quick facts

How many LUTs does the XC6SLX75T have?

The XC6SLX75T has 46,648 LUT6 look-up tables (74,637 logic cells as published by AMD). Logic block: 6-input look-up table, fracturable into two LUT5 with shared inputs.

How many DSP blocks does the XC6SLX75T have?

The XC6SLX75T has 132 DSP48A1 slices and 3 Mb of block RAM.

Does the XC6SLX75T have transceivers?

Yes, 8 GTP transceivers at up to 3.2 Gb/s.

What are the alternatives to the XC6SLX75T?

Devices of similar size in other families include XC7A75T (AMD Artix-7), LFE3-70EA (Lattice LatticeECP3), 5CGXC5 (Altera Cyclone V).

Which software is used to design with the XC6SLX75T?

Designs for the XC6SLX75T are built with AMD ISE Design Suite.

Other Spartan-6 devices

DeviceLUTsVendor logicDSPBlock RAMMax I/OTransceiversPCIeCoreScore
XC6SLX42,400 LUT63.8K LC80.2 Mb132———
XC6SLX95,720 LUT69.2K LC160.6 Mb200———
XC6SLX169,112 LUT614.6K LC320.6 Mb232———
XC6SLX2515,032 LUT624.1K LC380.9 Mb266———
XC6SLX25T15,032 LUT624.1K LC380.9 Mb2502 GTP 3.2 Gb/sGen1—
XC6SLX4527,288 LUT643.7K LC582 Mb358———
XC6SLX45T27,288 LUT643.7K LC582 Mb2964 GTP 3.2 Gb/sGen1—
XC6SLX7546,648 LUT674.6K LC1323 Mb408———
XC6SLX75T46,648 LUT674.6K LC1323 Mb3488 GTP 3.2 Gb/sGen1—
XC6SLX10063,288 LUT6101K LC1804.7 Mb480———
XC6SLX100T63,288 LUT6101K LC1804.7 Mb4988 GTP 3.2 Gb/sGen1—
XC6SLX15092,152 LUT6147K LC1804.7 Mb576———
XC6SLX150T92,152 LUT6147K LC1804.7 Mb5408 GTP 3.2 Gb/sGen1—

Source: Spartan-6 Family Overview, DS160 (v2.0). Data is extracted automatically from the vendor's selection guide; verify critical values in the device data sheet.