XC3S400A-4FTG256C [Xilinx]

The Spartan-3A FPGA family provides a low-cost, high-performance logic solution for high-volume, cost-sensitive applications. It features densities from 50K to 1.4M system gates, with up to 25,344 logic cells, 576 Kbits of block RAM, 176 Kbits of distributed RAM, and 32 multipliers. It supports multi-voltage I/O standards including LVCMOS, LVTTL, HSTL, SSTL, and differential standards like LVDS, with up to 502 I/O pins. The family includes Digital Clock Managers (DCMs) for clock management, suspend/hibernate modes for power reduction, and configuration via SPI, BPI, or JTAG. It is compatible with Xilinx ISE tools and supports embedded processors like MicroBlaze.