{"id":6646,"date":"2025-11-18T16:04:09","date_gmt":"2025-11-18T08:04:09","guid":{"rendered":"https:\/\/www.lxbchip.com\/?post_type=product&#038;p=6646"},"modified":"2026-01-29T19:01:57","modified_gmt":"2026-01-29T11:01:57","slug":"xc4vlx25-11ffg668c","status":"publish","type":"product","link":"https:\/\/www.lxbchip.com\/vi\/products\/xc4vlx25-11ffg668c\/","title":{"rendered":"XC4VLX25-11FFG668C"},"content":{"rendered":"<table id=\"table_1\" class=\"scroll display nowrap data-t data-t wpDataTable wpDataTableID-8 dataTable\" data-described-by=\"table_1_desc\" data-wpdatatable_id=\"8\" aria-describedby=\"table_1_info\">\n<thead>\n<tr>\n<th class=\"wdtheader sort expand column-modelpn sorting\" tabindex=\"0\" colspan=\"1\" rowspan=\"1\" data-class=\"expand\" aria-controls=\"table_1\" aria-label=\" M\u1eabu P\/N ch\u01b0a x\u00e1c \u0111\u1ecbnh\">M\u00c3 S\u1ea2N PH\u1ea8M<\/th>\n<th class=\"wdtheader sort column-series sorting\" tabindex=\"0\" colspan=\"1\" rowspan=\"1\" aria-controls=\"table_1\" aria-label=\" Seriesundefined\">B\u1ed8 PHIM<\/th>\n<th class=\"wdtheader sort numdata float column-numberoflabsclbs sorting\" tabindex=\"0\" colspan=\"1\" rowspan=\"1\" aria-controls=\"table_1\" aria-label=\" S\u1ed1 l\u01b0\u1ee3ng LABs\/CLBsundefined\">S\u1ed0 L\u01af\u1ee2NG PH\u00d2NG TH\u00cd NGHI\u1ec6M\/CLBS<\/th>\n<th class=\"wdtheader sort numdata float column-speedgrade sorting\" tabindex=\"0\" colspan=\"1\" rowspan=\"1\" aria-controls=\"table_1\" aria-label=\" T\u1ed1c \u0111\u1ed9 Gradeundefined\">\u0110\u1ed8 B\u1ec0N THEO T\u1ed0C \u0110\u1ed8<\/th>\n<th class=\"wdtheader sort column-numberoflogicelementscells sorting\" tabindex=\"0\" colspan=\"1\" rowspan=\"1\" aria-controls=\"table_1\" aria-label=\" S\u1ed1 l\u01b0\u1ee3ng c\u00e1c ph\u1ea7n t\u1eed logic \/ \u00f4 kh\u00f4ng x\u00e1c \u0111\u1ecbnh\">S\u1ed0 L\u01af\u1ee2NG PH\u1ea6N T\u1eec L\u1ed0I \/ T\u1ebe B\u00c0O<\/th>\n<th class=\"wdtheader sort column-totalrambits sorting\" tabindex=\"0\" colspan=\"1\" rowspan=\"1\" aria-controls=\"table_1\" aria-label=\" T\u1ed5ng s\u1ed1 bit RAM ch\u01b0a \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a\">T\u1ed5ng s\u1ed1 bit RAM<\/th>\n<th class=\"wdtheader sort numdata integer column-numberofio sorting sorting_asc\" tabindex=\"0\" colspan=\"1\" rowspan=\"1\" aria-controls=\"table_1\" aria-label=\" S\u1ed1 l\u01b0\u1ee3ng I\/O kh\u00f4ng x\u00e1c \u0111\u1ecbnh\" aria-sort=\"ascending\">S\u1ed0 L\u01af\u1ee2NG I\/O<\/th>\n<th class=\"wdtheader sort column-voltagesupply sorting\" tabindex=\"0\" colspan=\"1\" rowspan=\"1\" aria-controls=\"table_1\" aria-label=\" \u0110i\u1ec7n \u00e1p - Ngu\u1ed3n cung c\u1ea5p ch\u01b0a x\u00e1c \u0111\u1ecbnh\">\u0110i\u1ec7n \u00e1p \u2013 Ngu\u1ed3n c\u1ea5p<\/th>\n<th class=\"wdtheader sort column-mountingtype sorting\" tabindex=\"0\" colspan=\"1\" rowspan=\"1\" aria-controls=\"table_1\" aria-label=\" Lo\u1ea1i l\u1eafp \u0111\u1eb7t ch\u01b0a x\u00e1c \u0111\u1ecbnh\">Lo\u1ea1i l\u1eafp \u0111\u1eb7t<\/th>\n<th class=\"wdtheader sort column-operatingtemperature sorting\" tabindex=\"0\" colspan=\"1\" rowspan=\"1\" aria-controls=\"table_1\" aria-label=\" Nhi\u1ec7t \u0111\u1ed9 ho\u1ea1t \u0111\u1ed9ng: Ch\u01b0a x\u00e1c \u0111\u1ecbnh\">NHI\u1ec6T \u0110\u1ed8 HO\u1ea0T \u0110\u1ed8NG<\/th>\n<th class=\"wdtheader sort column-packagecase sorting\" tabindex=\"0\" colspan=\"1\" rowspan=\"1\" aria-controls=\"table_1\" aria-label=\" G\u00f3i \/ V\u1ecf h\u1ed9p\">G\u00d3I \/ H\u1ed8P<\/th>\n<th class=\"wdtheader sort column-supplierdevicepackage sorting\" tabindex=\"0\" colspan=\"1\" rowspan=\"1\" aria-controls=\"table_1\" aria-label=\" G\u00f3i thi\u1ebft b\u1ecb nh\u00e0 cung c\u1ea5p (kh\u00f4ng x\u00e1c \u0111\u1ecbnh)\">G\u00d3I THI\u1ebeT B\u1eca C\u1ee6A NH\u00c0 CUNG C\u1ea4P<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr class=\"odd\">\n<td class=\"expand column-modelpn\">XC4VLX25-11FFG668C<\/td>\n<td class=\"column-series\">Virtex-4 SX<\/td>\n<td class=\"numdata float column-numberoflabsclbs\">2.688,00<\/td>\n<td class=\"numdata float column-speedgrade\">-11,00<\/td>\n<td class=\"column-numberoflogicelementscells\">24192 Th\u00e0nh ph\u1ea7n logic<\/td>\n<td class=\"column-totalrambits\">1.327.104 bit<\/td>\n<td class=\"numdata integer column-numberofio sorting_1\">448<\/td>\n<td class=\"column-voltagesupply\">1,14 V ~ 1,26 V<\/td>\n<td class=\"column-mountingtype\">L\u1eafp \u0111\u1eb7t b\u1ec1 m\u1eb7t<\/td>\n<td class=\"column-operatingtemperature\">Th\u01b0\u01a1ng m\u1ea1i (0\u00b0C ~ +85\u00b0C)<\/td>\n<td class=\"column-packagecase\">668-BBGA, FCBGA<\/td>\n<td class=\"column-supplierdevicepackage\">668-FCBGA (27\u00d727)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p data-path-to-node=\"3\"><span style=\"color: #003366;\"><strong>XC4VLX25-11FFG668C: High-Speed Virtex-4 LX Logic Platform<\/strong><\/span><\/p>\n<p data-path-to-node=\"4\">The <b data-path-to-node=\"4\" data-index-in-node=\"4\">XC4VLX25-11FFG668C<\/b> is a high-performance FPGA within the Virtex-4 LX family, optimized for logic-heavy applications that demand tighter timing margins. Utilizing the 90nm process, the LX series focuses on maximizing logic-to-feature ratios, making it the preferred choice for high-speed I\/O interfacing, frame buffering, and complex state machine implementations.<\/p>\n<p data-path-to-node=\"5\">As a <b data-path-to-node=\"5\" data-index-in-node=\"5\">-11 speed grade<\/b> device, this variant offers a performance boost over the standard -10, providing the necessary slack for designs running at higher clock frequencies or those with complex routing paths that are sensitive to propagation delays.<\/p>\n<p data-path-to-node=\"6\"><span style=\"color: #003366;\"><strong>Core Technical Parameters<\/strong><\/span><\/p>\n<ul data-path-to-node=\"7\">\n<li>\n<p data-path-to-node=\"7,0,0\"><b data-path-to-node=\"7,0,0\" data-index-in-node=\"0\">T\u1ebf b\u00e0o logic:<\/b> 24,192<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"7,1,0\"><b data-path-to-node=\"7,1,0\" data-index-in-node=\"0\">Max Clock Management Tiles (CMTs):<\/b> 8 (Incorporating DCMs and PMCDs)<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"7,2,0\"><b data-path-to-node=\"7,2,0\" data-index-in-node=\"0\">B\u1ed9 nh\u1edb RAM kh\u1ed1i:<\/b> 1,296 Kb<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"7,3,0\"><b data-path-to-node=\"7,3,0\" data-index-in-node=\"0\">DSP48 Slices:<\/b> 48<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"7,4,0\"><b data-path-to-node=\"7,4,0\" data-index-in-node=\"0\">Max User I\/O:<\/b> 448<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"7,5,0\"><b data-path-to-node=\"7,5,0\" data-index-in-node=\"0\">G\u00f3i:<\/b> FFG668 (Fine-pitch Flip-Chip BGA, Pb-Free)<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"7,6,0\"><b data-path-to-node=\"7,6,0\" data-index-in-node=\"0\">\u0110\u00e1nh gi\u00e1 t\u1ed1c \u0111\u1ed9:<\/b> -11 (High Performance)<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"7,7,0\"><b data-path-to-node=\"7,7,0\" data-index-in-node=\"0\">Temperature Grade:<\/b> Commercial (<span class=\"math-inline\" data-math=\"0\u00b0C\" data-index-in-node=\"31\">$0\u00b0C$<\/span> to <span class=\"math-inline\" data-math=\"+85\u00b0C\" data-index-in-node=\"38\">$+85\u00b0C$<\/span>)<\/p>\n<\/li>\n<\/ul>\n<p data-path-to-node=\"8\"><span style=\"color: #003366;\"><strong>Engineering Implementation &amp; Design Notes<\/strong><\/span><\/p>\n<p data-path-to-node=\"9\">When integrating the XC4VLX25-11FFG668C into an existing system or a new legacy-support design, keep these hardware-level factors in mind:<\/p>\n<ol start=\"1\" data-path-to-node=\"10\">\n<li>\n<p data-path-to-node=\"10,0,0\"><b data-path-to-node=\"10,0,0\" data-index-in-node=\"0\">Timing Closure:<\/b> The -11 speed grade is approximately 10-15% faster than the -10. While this aids in meeting setup times (<span class=\"math-inline\" data-math=\"T_{su}\" data-index-in-node=\"121\">$T_{su}$<\/span>), engineers should perform a secondary static timing analysis (STA) to ensure that hold time (<span class=\"math-inline\" data-math=\"T_h\" data-index-in-node=\"222\">$T_h$<\/span>) violations haven&#8217;t been introduced in short paths due to the faster silicon.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"10,1,0\"><b data-path-to-node=\"10,1,0\" data-index-in-node=\"0\">Configuration Requirements:<\/b> This device requires a 1.2V <span class=\"math-inline\" data-math=\"V_{CCINT}\" data-index-in-node=\"56\">$V_{CCINT}$<\/span> supply. Ensure your power distribution network (PDN) is decoupled correctly with low-ESR capacitors near the FFG668 footprint to manage the transient currents typical of high-speed switching in the Virtex-4 architecture.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"10,2,0\"><b data-path-to-node=\"10,2,0\" data-index-in-node=\"0\">ISE Design Suite:<\/b> Note that the Virtex-4 family is <b data-path-to-node=\"10,2,0\" data-index-in-node=\"51\">not supported by Vivado<\/b>. You must use <b data-path-to-node=\"10,2,0\" data-index-in-node=\"89\">Xilinx ISE 14.7<\/b>. If you are pulling an archived project, ensure your constraints file (.UCF) is mapped correctly to the 668-pinout to avoid I\/O bank voltage conflicts.<\/p>\n<\/li>\n<\/ol>\n<p data-path-to-node=\"11\"><span style=\"color: #003366;\"><strong>Why Sourcing the -11 Grade Matters<\/strong><\/span><\/p>\n<p data-path-to-node=\"12\">In many medical and defense systems, the XC4VLX25-11FFG668C was specified because the design would not &#8220;lock&#8221; at the -10 speed grade. Replacing a -11 with a -10 can lead to intermittent system crashes or bit errors. We prioritize providing the exact speed grade specified in your original netlist to maintain system integrity.<\/p>\n<p data-path-to-node=\"17\"><span style=\"color: #003366;\"><strong>Hardware Engineer\u2019s FAQ<\/strong><\/span><\/p>\n<p data-path-to-node=\"18\"><b data-path-to-node=\"18\" data-index-in-node=\"0\">Can I use a -12 speed grade instead of this -11?<\/b> Technically, yes. Xilinx speed grades are backward compatible; a faster part (-12) can always do the job of a slower part (-11), provided the thermal envelope remains within limits. However, the -11 is usually the &#8220;sweet spot&#8221; for cost vs. performance in maintenance cycles.<\/p>\n<p data-path-to-node=\"19\"><b data-path-to-node=\"19\" data-index-in-node=\"0\">Does the FFG668 package require specialized soldering?<\/b> The &#8220;FFG&#8221; signifies a Lead-Free Flip-Chip BGA. It requires a standard RoHS reflow profile. Because the die is mounted directly to the substrate (Flip-Chip), the package has excellent heat dissipation through the top of the chip, but it is sensitive to uneven mechanical pressure from heatsinks.<\/p>\n<p data-path-to-node=\"20\"><b data-path-to-node=\"20\" data-index-in-node=\"0\">How do I handle the EOL (End of Life) status of this part?<\/b> The Virtex-4 is a mature product. When sourcing, we recommend requesting the specific Date Code (D\/C) and ensuring the parts have been stored in MSL-compliant (Moisture Sensitivity Level) packaging to prevent popcorn effects during reflow.<\/p>\n<p data-path-to-node=\"20\"><a href=\"https:\/\/www.lxbchip.com\/vi\/contact-us\/\">Li\u00ean h\u1ec7 v\u1edbi LXB Semicon<\/a>\u00a0for availability, pricing, and technical support.<\/p>","protected":false},"excerpt":{"rendered":"<p><strong>Nh\u00e0 s\u1ea3n xu\u1ea5t:<\/strong> Xilinx<br \/>\n<strong>T\u1ebf b\u00e0o logic:<\/strong> 24,576<br \/>\n<strong>C\u00e1c l\u00e1t c\u1eaft logic:<\/strong> 1,536<br \/>\n<strong>B\u1ed9 nh\u1edb RAM t\u00edch h\u1ee3p (eRAM):<\/strong> 1,105,920 bits<br \/>\n<strong>G\u00f3i:<\/strong> FFG668<br \/>\n<strong>Nhi\u1ec7t \u0111\u1ed9 ho\u1ea1t \u0111\u1ed9ng:<\/strong> Th\u01b0\u01a1ng m\u1ea1i (0\u00b0C \u0111\u1ebfn +85\u00b0C)<\/p>","protected":false},"featured_media":6118,"template":"","meta":{"_acf_changed":false,"jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"product_brand":[],"product_cat":[21],"product_tag":[],"class_list":{"0":"post-6646","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-xilinx","8":"first","9":"instock","10":"shipping-taxable","11":"product-type-simple"},"acf":[],"aioseo_notices":[],"jetpack_publicize_connections":[],"_links":{"self":[{"href":"https:\/\/www.lxbchip.com\/vi\/wp-json\/wp\/v2\/product\/6646","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.lxbchip.com\/vi\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.lxbchip.com\/vi\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.lxbchip.com\/vi\/wp-json\/wp\/v2\/media\/6118"}],"wp:attachment":[{"href":"https:\/\/www.lxbchip.com\/vi\/wp-json\/wp\/v2\/media?parent=6646"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.lxbchip.com\/vi\/wp-json\/wp\/v2\/product_brand?post=6646"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.lxbchip.com\/vi\/wp-json\/wp\/v2\/product_cat?post=6646"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.lxbchip.com\/vi\/wp-json\/wp\/v2\/product_tag?post=6646"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}