{"id":9376,"date":"2026-07-03T06:18:00","date_gmt":"2026-07-03T06:18:00","guid":{"rendered":"https:\/\/materialparts.com\/xc3s400a-4ftg256c\/"},"modified":"2026-07-03T07:37:37","modified_gmt":"2026-07-03T07:37:37","slug":"xc3s400a-4ftg256c","status":"publish","type":"post","link":"https:\/\/materialparts.com\/ar\/xc3s400a-4ftg256c\/","title":{"rendered":"XC3S400A-4FTG256C"},"content":{"rendered":"

\u0646\u0638\u0631\u0629 \u0639\u0627\u0645\u0629 \u0639\u0644\u0649 \u0627\u0644\u0645\u0646\u062a\u062c<\/h2>\n

The XC3S400A-4FTG256C is a Spartan-3A FPGA from AMD (formerly Xilinx), fabricated on a 90nm process. It features 400K system gates (8,064 logic cells), 360 Kb distributed RAM, 288 Kb block RAM, 16 dedicated 18×18 multipliers, and up to 195 user I\/Os. Packaged in a 256-pin FineLine BGA (FTG256), the -4 speed grade is the fastest commercial variant. Spartan-3A is optimized for cost-sensitive, high-volume applications.<\/p>\n

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System Gates<\/td>\n400K<\/td>\n<\/tr>\n
Logic Cells<\/td>\n8,064<\/td>\n<\/tr>\n
Distributed RAM<\/td>\n360 Kb<\/td>\n<\/tr>\n
Block RAM<\/td>\n288 Kb<\/td>\n<\/tr>\n
Dedicated Multipliers (18×18)<\/td>\n16<\/td>\n<\/tr>\n
DLLs<\/td>\n4<\/td>\n<\/tr>\n
User I\/O<\/td>\n195<\/td>\n<\/tr>\n
Process Technology<\/td>\n90nm<\/td>\n<\/tr>\n
Core Voltage<\/td>\n1.2V<\/td>\n<\/tr>\n
I\/O Voltage<\/td>\n1.2V to 3.3V<\/td>\n<\/tr>\n
\u0627\u0644\u062d\u0632\u0645\u0629<\/td>\nFTG256 (17×17 mm)<\/td>\n<\/tr>\n
Speed Grade<\/td>\n-4 (fastest commercial)<\/td>\n<\/tr>\n
\u062f\u0631\u062c\u0629 \u062d\u0631\u0627\u0631\u0629 \u0627\u0644\u062a\u0634\u063a\u064a\u0644<\/td>\n0C to +85C<\/td>\n<\/tr>\n<\/table>\n

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    \n
  • 90nm low-cost FPGA with 400K system gates<\/li>\n
  • DSP48A slices with 18×18 hardware multipliers<\/li>\n
  • Dual-port block RAM (18Kb each)<\/li>\n
  • Distributed SelectRAM+ in LUTs<\/li>\n
  • Digital Clock Managers (DCM) for flexible clocking<\/li>\n
  • Multi-standard I\/O (LVCMOS, LVTTL, SSTL, HSTL, LVDS)<\/li>\n<\/ul>\n

    \u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a<\/h2>\n
      \n
    • Bridge and protocol conversion<\/li>\n
    • Industrial control logic<\/li>\n
    • Display and video processing<\/li>\n
    • Cost-sensitive DSP coprocessing<\/li>\n
    • Motor control and sensor interfacing<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The XC3S400A-4FTG256C is a Spartan-3A FPGA from AMD (formerly Xilinx), fabricated on a 90nm process. It features 400K system gates (8,064 logic cells), 360 Kb distributed RAM, 288 Kb block RAM, 16 dedicated 18×18 multipliers, and up to 195 user I\/Os. Packaged in a 256-pin FineLine BGA (FTG256), the -4 speed grade is […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[53,13],"tags":[522],"chip_brand":[287],"class_list":["post-9376","post","type-post","status-publish","format-standard","hentry","category-discrete-semiconductor-devices","category-integrated-circuits-ics","tag-xc3s400a-4ftg256c","chip_brand-amd"],"acf":{"brief_explanation":"Spartan-3A FPGA, 400K gates, 90nm, 16x 18x18 multipliers, 256-pin FTBGA, commercial -4 speed grade","date_code":"25+","package_case":"FTG256 FineLine BGA (17x17 mm)","in_stock":39784,"datasheet":"https:\/\/www.amd.com\/content\/dam\/xilinx\/support\/documents\/data_sheets\/ds529.pdf","price":"$18.50 @ 1ku","product_introduction":"The XC3S400A-4FTG256C is a cost-optimized Spartan-3A FPGA from AMD, offering 400K system gates (8,064 logic cells) with 16 dedicated 18x18 multipliers in a compact 256-pin FTBGA package. With 288 Kb of block RAM and 360 Kb of distributed RAM, it provides sufficient memory for buffering and coefficient storage in cost-sensitive DSP applications. The -4 speed grade delivers the highest performance in the commercial temperature range, with DCMs enabling flexible clock synthesis and phase alignment.","working_principle":"The XC3S400A-4FTG256C operates as a low-cost reconfigurable logic device on a 90nm process. The core fabric consists of Configurable Logic Blocks (CLBs) each containing 4 slices with 4-input lookup tables (LUT4), carry chains, and flip-flops. Each slice can implement any 4-input combinational function or serve as distributed RAM (SelectRAM+). The 16 DSP48A blocks provide dedicated 18x18-bit hardware multipliers with 48-bit accumulators for efficient FIR filtering and PID control. Block RAM (18Kb per block) supports dual-port access for simultaneous read\/write operations. Digital Clock Managers (DCMs) use delay-locked loop (DLL) technology for clock deskew, frequency synthesis, and phase shifting. The Spartan-3A supports MultiBoot configuration, allowing multiple bitstreams to be stored and selected at runtime.","pin_description":"\n
      Pin Group<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>\n
      Power<\/td>VCCINT, VCCAUX, VCCO<\/td>Power<\/td>Core 1.2V, Auxiliary 2.5V, I\/O banks 1.2-3.3V<\/td><\/tr>\n
      I\/O<\/td>IO_Lxx<\/td>Bidirectional<\/td>195 SelectIO user pins (LVCMOS, LVTTL, LVDS, SSTL)<\/td><\/tr>\n
      Configuration<\/td>TCK, TMS, TDI, TDO<\/td>JTAG<\/td>JTAG programming interface<\/td><\/tr>\n
      Clock<\/td>GCLK<\/td>Input<\/td>Global clock input pins (DCM-driven)<\/td><\/tr>\n
      Power<\/td>M[2:0], HSWAP, PROG_B<\/td>Control<\/td>Configuration mode select and program control<\/td><\/tr>\n<\/table>","application_scenarios":"\n
      Application<\/th>Circuit Role<\/th>Key Requirement<\/th><\/tr>\n
      Protocol Bridge<\/td>UART\/SPI\/I2C conversion<\/td>195 I\/O, 400K gates, low cost<\/td><\/tr>\n
      Motor Control<\/td>PWM generation and encoder interface<\/td>DCM, multipliers, 400K gates<\/td><\/tr>\n
      Video Processing<\/td>Timing generator and scaling<\/td>288Kb BRAM, 16 multipliers<\/td><\/tr>\n
      Industrial Logic<\/td>Glue logic and state machines<\/td>8064 LC, 195 I\/O, 1.2V core<\/td><\/tr>\n
      Sensor Interface<\/td>Data acquisition front-end<\/td>Multi-standard I\/O, DCM<\/td><\/tr>\n<\/table>","alternative_models":"\n
      Model<\/th>Manufacturer<\/th>Key Difference<\/th><\/tr>\n
      XC3S400A-4FGG320C<\/td>AMD<\/td>Same die, 320-pin FBGA (more I\/O)<\/td><\/tr>\n
      XC3S700A-4FTG256C<\/td>AMD<\/td>Larger Spartan-3A (700K gates)<\/td><\/tr>\n
      XC3S1400A-4FTG256C<\/td>AMD<\/td>Largest Spartan-3A (1400K gates)<\/td><\/tr>\n
      XC6SLX9-2FTG256C<\/td>AMD<\/td>Spartan-6, newer generation, 9K LC<\/td><\/tr>\n
      XC7S25-1FTG256C<\/td>AMD<\/td>Spartan-7, 28nm, 24K LC<\/td><\/tr>\n<\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/9376","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/comments?post=9376"}],"version-history":[{"count":1,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/9376\/revisions"}],"predecessor-version":[{"id":9405,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/9376\/revisions\/9405"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/media?parent=9376"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/categories?post=9376"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/tags?post=9376"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=9376"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}