Found 4 alternatives for XC3S1400AN-4FG676I by Xilinx Inc.. Embedded Fpgas Field Programmable Gate Array — 676-BGA.
IC FPGA 484 I/O 676FCBGA
VIRTEX II FPGA
IC FPGA 469 I/O 676FBGA
IC FPGA 444 I/O 676FBGA