{"id":5739,"date":"2026-05-14T05:51:09","date_gmt":"2026-05-14T05:51:09","guid":{"rendered":"https:\/\/lp.szlogic.cn\/knowledge-center\/400g-qsfp-dd-transceivers-technology-overview\/"},"modified":"2026-06-22T03:24:01","modified_gmt":"2026-06-22T03:24:01","slug":"400g-qsfp-dd-transceivers-technology-overview","status":"publish","type":"post","link":"https:\/\/resourceslp.szlogic.cn\/pt\/knowledge-center\/400g-qsfp-dd-transceivers-technology-overview","title":{"rendered":"Transceptores 400G QSFP\u2011DD: Vis\u00e3o Geral da Tecnologia"},"content":{"rendered":"<h2 class=\"wp-block-heading\" >Introdu\u00e7\u00e3o<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-26045-400g-qsfp-dd-osfp-qsfp112.htm?ca=1435&amp;cv=7969\"><strong>400\u202fG QSFP\u2011DD<\/strong><\/a> tornou-se a pedra angular das redes de alta largura de banda. Projetado para fornecer <strong>400\u202fGbps por porta<\/strong>, o <strong>Quad Small Form-factor Pluggable Double Density (QSFP-DD)<\/strong> a interface duplica a densidade de vias dos m\u00f3dulos QSFP padr\u00e3o, tornando-a ideal para data centers hiperscale, computa\u00e7\u00e3o em nuvem, computa\u00e7\u00e3o de alto desempenho (HPC) e tecidos de rede impulsionados por IA.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1200\" height=\"712\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/6774e215319847daae7dc3854e2a665f.webp\" alt=\"QSFP\u2011DD 400G Transceivers\" class=\"wp-image-5735\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/6774e215319847daae7dc3854e2a665f.webp 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/6774e215319847daae7dc3854e2a665f-300x178.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/6774e215319847daae7dc3854e2a665f-1024x608.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/6774e215319847daae7dc3854e2a665f-768x456.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/6774e215319847daae7dc3854e2a665f-18x12.webp 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" >Fator de forma e interface el\u00e9trica<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Baseado na pegada QSFP28, o QSFP\u2011DD incorpora uma interface el\u00e9trica de 8 vias (cada uma de 50\u202fG usando PAM4 ou 25\u202fG usando<strong> <\/strong><a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/pt\/glossary\/understanding-non-return-to-zero-in-digital-communication\/\"><strong>NRZ<\/strong><\/a>), fornecendo at\u00e9 400\u202fGbps. A Ascent Optics observa que o design de 76 pinos em duas fileiras permite compatibilidade reversa com dispositivos QSFP28\/56 \u2014 uma caracter\u00edstica fundamental para atualiza\u00e7\u00f5es de rede cont\u00ednuas.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >Modula\u00e7\u00e3o PAM4 e estrutura \u00f3ptica de vias<\/h2>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"1200\" height=\"1100\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/3c29ff0a2c7a4addb273df292ffc9eb2.webp\" alt=\"PAM4 Modulation\" class=\"wp-image-5736\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/3c29ff0a2c7a4addb273df292ffc9eb2.webp 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/3c29ff0a2c7a4addb273df292ffc9eb2-300x275.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/3c29ff0a2c7a4addb273df292ffc9eb2-1024x939.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/3c29ff0a2c7a4addb273df292ffc9eb2-768x704.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/3c29ff0a2c7a4addb273df292ffc9eb2-13x12.webp 13w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">As \u00f3pticas modernas de 400\u202fG QSFP\u2011DD dependem de <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/pt\/glossary\/what-is-pam4-four-level-pulse-amplitude-modulation-basics\/\"><strong>PAM4<\/strong><\/a><strong> (Modula\u00e7\u00e3o por amplitude de pulso com quatro n\u00edveis)<\/strong>. Ao codificar dois bits por s\u00edmbolo, a PAM4 duplica a taxa de transfer\u00eancia de dados sem aumentar a largura de banda do sinal \u2014 essencial para liga\u00e7\u00f5es de alta velocidade.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">As configura\u00e7\u00f5es \u00f3pticas de vias variam conforme o tipo de m\u00f3dulo:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>SR4\/SR8<\/strong>: 4 ou 8 vias paralelas em fibra multimodo (por exemplo, m\u00f3dulos SR4 utilizam 4 vias paralelas, cada uma operando a ~100\u202fGbps PAM4 (53,125\u202fGBd), enquanto m\u00f3dulos SR8 utilizam 8 vias a ~50\u202fGbps PAM4 (26,5625\u202fGBd), permitindo conex\u00f5es de curto alcance de alta densidade sobre fibra multimodo.). Ideal para interconex\u00f5es de curto alcance (&lt;100\u202fm) no backbone de fibra multimodo.<\/p><\/li><li><p><strong>DR4<\/strong>: \u00d3ptica de 4 vias em fibra monomodo MPO\u201112, suportando ~500\u202fm sobre fibra monomodo.<\/p><\/li><li><p><strong>FR4<\/strong>: 4 vias CWDM de 100\u202fG cada, utilizando conectores LC duplex, suportando 2\u202fkm sobre fibra monomodo.<\/p><\/li><li><p><strong>LR4<\/strong>: Semelhante ao FR4, mas projetado para alcances mais longos de 10\u202fkm, com \u00f3ptica CWDM a 1310\u202fnm.<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" >Projeto t\u00e9rmico e gerenciamento de energia<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><span class=\"qc-p1-tag\">Operando a 400\u202fG, o gerenciamento t\u00e9rmico eficiente \u00e9 vital. O <\/span><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/products\/472016.htm\">LQD-CW400-LR4C<\/a><span class=\"qc-p1-tag\">, da LINK\u2011PP, por exemplo, suporta dissipa\u00e7\u00e3o de at\u00e9 ~12\u202fW e emprega um conector plano SMT, <\/span>equipado com dissipador de calor plano e projetado para melhor compatibilidade com fluxo de ar em gaiolas de alta densidade<span class=\"qc-p1-tag\">. Esses recursos mant\u00eam desempenho est\u00e1vel sob cargas intensas.<\/span><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >Padr\u00f5es e compatibilidade reversa<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">O QSFP\u2011DD cumpre a <strong>QSFP-DD MSA<\/strong> e a IEEE <strong>3bs<\/strong> and <strong>3cd<\/strong> , suportando a interface el\u00e9trica <strong>400GAUI-8<\/strong> \u2014 um protocolo de sinaliza\u00e7\u00e3o de 8 vias a 50\u202fGbps PAM4 usado para a estrutura\u00e7\u00e3o Ethernet de 400G. Embora ofere\u00e7a compatibilidade reversa com dispositivos de 100\/200\/400\u202fG por meio de adaptadores ou cabos de divis\u00e3o (breakout). Essa flexibilidade simplifica a implanta\u00e7\u00e3o e as atualiza\u00e7\u00f5es graduais.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >S\u00e9rie LINK\u2011PP LQD\u2011CW400: Implementa\u00e7\u00f5es pr\u00e1ticas<\/h2>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"1200\" height=\"449\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/78a38ff8848244188566f979d642ee22.webp\" alt=\"400G QSFP\u2011DD Optical Modules\" class=\"wp-image-5737\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/78a38ff8848244188566f979d642ee22.webp 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/78a38ff8848244188566f979d642ee22-300x112.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/78a38ff8848244188566f979d642ee22-1024x383.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/78a38ff8848244188566f979d642ee22-768x287.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/78a38ff8848244188566f979d642ee22-18x7.webp 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">A LINK\u2011PP oferece uma ampla gama de <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-26045-400g-qsfp-dd-osfp-qsfp112-page1.htm?ca=1435,1454&amp;cv=7969,8282\">M\u00f3dulos \u00f3pticos 400G QSFP\u2011DD<\/a> adaptados a diversas aplica\u00e7\u00f5es:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>LQD-CW400-DR4C<\/strong> \u2013 QSFP-DD PAM4 para 500\u202fm sobre fibra monomodo, suporta 4\u00d7100G-DR;<\/p><\/li><li><p><strong>LQD-CW400-FR4C<br><\/strong> \u2013 2\u202fkm sobre fibra monomodo com conector LC duplex;<\/p><\/li><li><p><strong>LQD-CW400-LR4C<\/strong> \u2013 Alcance de at\u00e9 10\u202fkm, \u00f3ptica CWDM a 1310\u202fnm <\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Cada unidade suporta CMIS 4.0, monitoramento \u00f3ptico digital e opera entre 0\u202f\u00b0C e 70\u202f\u00b0C, com consumo t\u00edpico de energia inferior a 10\u202fW. Amostras gratuitas e suporte para integra\u00e7\u00e3o OEM est\u00e3o dispon\u00edveis na loja oficial da LINK\u2011PP em <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/\">l\u2011p.com<\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >Aplica\u00e7\u00f5es e benef\u00edcios<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>Data center e topologia spine\u2013leaf<\/strong>: Conex\u00f5es 400\u202fG de alta densidade otimizam espa\u00e7o e desempenho.<\/p><\/li><li><p><strong>Clusters HPC e IA<\/strong>: Baixa lat\u00eancia e alta vaz\u00e3o s\u00e3o cr\u00edticas para treinamento e simula\u00e7\u00e3o.<\/p><\/li><li><p><strong>Fronthaul e transporte 5G<\/strong>: M\u00f3dulos FR4 e DR4 suportam comprimentos de liga\u00e7\u00e3o robustos em redes urbanas.<\/p><\/li><li><p><strong>Escala em nuvem e DCI<\/strong>: Interfaces escal\u00e1veis em ambientes campus e metropolitano.<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Esses m\u00f3dulos oferecem <strong>duas vezes a densidade de portas das gera\u00e7\u00f5es anteriores<\/strong>, pronta <strong>migra\u00e7\u00e3o para 800\u202fG<\/strong>, and <strong>ampla compatibilidade reversa<\/strong> com infraestruturas existentes de 100G\/200G por meio de solu\u00e7\u00f5es de divis\u00e3o (breakout) ou adaptadores.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >Conclus\u00e3o<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>400\u202fG QSFP\u2011DD<\/strong> \u00e9 agora o padr\u00e3o refer\u00eancia para infraestrutura de rede de pr\u00f3xima gera\u00e7\u00e3o. Seu design compacto, modula\u00e7\u00e3o PAM4, op\u00e7\u00f5es \u00f3pticas diversificadas e resili\u00eancia t\u00e9rmica entregam desempenho incompar\u00e1vel em aplica\u00e7\u00f5es de data center, HPC, IA e telecomunica\u00e7\u00f5es.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Para empresas que se preparam para migrar para redes 400\u202fG, a <strong>s\u00e9rie LINK\u2011PP LQD\u2011CW400<\/strong> fornece um portf\u00f3lio de <strong>m\u00f3dulos compat\u00edveis com os padr\u00f5es<\/strong>, <strong>testados quanto \u00e0 interoperabilidade<\/strong> \u2014 abrangendo desde SR at\u00e9 LR4 \u2014 projetados para integrar-se perfeitamente em ecossistemas existentes. Visite <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/\">a loja oficial da LINK\u2011PP<\/a> para explorar fichas t\u00e9cnicas dos produtos, solicitar or\u00e7amento ou obter amostras gratuitas para avalia\u00e7\u00e3o.<\/p>","protected":false},"excerpt":{"rendered":"<p>Explore the technology behind 400\u202fG QSFP\u2011DD transceivers, including form factor, modulation, optical lanes, and thermal design. <\/p>","protected":false},"author":1,"featured_media":5738,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[17,26],"class_list":["post-5739","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-knowledge-center","tag-400g-optical-modules","tag-optics-transceivers"],"blocksy_meta":[],"acf":[],"_links":{"self":[{"href":"https:\/\/resourceslp.szlogic.cn\/pt\/wp-json\/wp\/v2\/posts\/5739","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/resourceslp.szlogic.cn\/pt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/resourceslp.szlogic.cn\/pt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/pt\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/pt\/wp-json\/wp\/v2\/comments?post=5739"}],"version-history":[{"count":4,"href":"https:\/\/resourceslp.szlogic.cn\/pt\/wp-json\/wp\/v2\/posts\/5739\/revisions"}],"predecessor-version":[{"id":10685,"href":"https:\/\/resourceslp.szlogic.cn\/pt\/wp-json\/wp\/v2\/posts\/5739\/revisions\/10685"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/pt\/wp-json\/wp\/v2\/media\/5738"}],"wp:attachment":[{"href":"https:\/\/resourceslp.szlogic.cn\/pt\/wp-json\/wp\/v2\/media?parent=5739"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/pt\/wp-json\/wp\/v2\/categories?post=5739"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/pt\/wp-json\/wp\/v2\/tags?post=5739"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}