52160 logic cells in a 15x15 mm BGA
The XC7S50-2FTGB196C is an AMD Spartan®-7 FPGA packing 52160 logic elements and 2764800 total RAM bits into a 196-ball CSBGA package measuring 15x15 mm. That is enough fabric for a modest soft-core processor plus peripheral glue, or a small video pipeline, without stepping up to the larger Artix or Kintex families. With 100 user I/O available, this device suits designs where the pin count is the binding constraint — the logic density is high enough that the I/O count, not the LUT budget, decides the fit.
Logic fabric and memory headroom
The 4075 LABs/CLBs break down into 52160 logic cells — each cell is a 6-input LUT plus flip-flop in the Spartan-7 architecture. The 2764800 total RAM bits (about 2.6 Mbit) are distributed as Block RAM, enough for a 128-deep FIFO per channel on a 16-channel data acquisition front-end, or a small frame buffer at VGA resolution. Core voltage runs at 0.95V to 1.05V, which keeps dynamic power in check for a device of this density.
The 100 I/O fan out to the outer two or three ball rows; inner balls are core power and ground. A 4-layer PCB with a solid ground plane under the BGA footprint is the minimum for signal integrity. Moisture sensitivity level (MSL) is not listed in the spec table, but standard Spartan-7 CSBGA parts are typically MSL 3 — bake before reflow if the floor life has been exceeded. The Tray packaging means the part ships in anti-static trays, not tape-and-reel, so plan for pick-and-place with a tray feeder or a waffle-pack adapter.
The base product number is XC7S50; the -2 speed grade is the mid-range option, and the FTGB196 package suffix identifies the 196-ball CSBGA. No pin-compatible second source exists from other vendors — this is a single-sourced AMD device, so BOM risk is managed through distributor stock rather than a drop-in alternative.