https://ttl-expired.net/notes/ Recent content in Notes on TTL Expired Hugo en-us Wed, 29 Apr 2026 00:00:00 +0000 https://ttl-expired.net/notes/broadcomchipsets/ Wed, 29 Apr 2026 00:00:00 +0000 https://ttl-expired.net/notes/broadcomchipsets/ <h1 id="broadcom-switch-chipset-families">Broadcom Switch Chipset Families</h1> <h2 id="1-tomahawk-series--">1. Tomahawk Series — <em>&ldquo;The Bandwidth Beast&rdquo;</em></h2> <p><strong>Focus:</strong> Maximum throughput, low latency, and high radix (port density). These are the &ldquo;packet pushers&rdquo; used in the Spine and Core of hyperscale data centers.</p> <h3 id="tomahawk-5-th5">Tomahawk 5 (TH5)</h3> <p>The first to hit <strong>51.2 Tbps</strong>. It introduced &ldquo;Cognitive Routing&rdquo; to handle the bursty nature of AI traffic and supports <strong>64 ports of 800GbE</strong>.</p> <h3 id="tomahawk-6-th6">Tomahawk 6 (TH6)</h3> <p>Hit production volume in March 2026. Doubles capacity to <strong>102.4 Tbps on a single die</strong>.</p> https://ttl-expired.net/notes/opticaltransceivers/ Wed, 29 Apr 2026 00:00:00 +0000 https://ttl-expired.net/notes/opticaltransceivers/ <table> <thead> <tr> <th>Form Factor</th> <th>Speed</th> <th>Lanes (Elec)</th> <th>Modulation</th> <th>Connector Types</th> <th>Approx. Intro</th> </tr> </thead> <tbody> <tr> <td>SFP+</td> <td>10 Gbps</td> <td>1 x 10G</td> <td>NRZ</td> <td>LC Duplex, RJ45</td> <td>2006</td> </tr> <tr> <td>SFP28</td> <td>25 Gbps</td> <td>1 x 25G</td> <td>NRZ</td> <td>LC Duplex</td> <td>2014</td> </tr> <tr> <td>SFP56</td> <td>50 Gbps</td> <td>1 x 50G</td> <td>PAM4</td> <td>LC Duplex</td> <td>2019</td> </tr> <tr> <td>SFP-DD</td> <td>100 Gbps</td> <td>2 x 50G</td> <td>PAM4</td> <td>LC Duplex</td> <td>2019/20</td> </tr> <tr> <td>QSFP+</td> <td>40 Gbps</td> <td>4 x 10G</td> <td>NRZ</td> <td>MPO-12, LC</td> <td>2012</td> </tr> <tr> <td>QSFP28</td> <td>100 Gbps</td> <td>4 x 25G</td> <td>NRZ</td> <td>MPO-12, LC</td> <td>2014</td> </tr> <tr> <td>QSFP56</td> <td>200 Gbps</td> <td>4 x 50G</td> <td>PAM4</td> <td>MPO-12, LC</td> <td>2019</td> </tr> <tr> <td>QSFP-DD</td> <td>400G / 800G</td> <td>8 x 50/100G</td> <td>PAM4</td> <td>MPO-16, LC, CS</td> <td>2017/21</td> </tr> <tr> <td>OSFP</td> <td>400G / 800G</td> <td>8 x 50/100G</td> <td>PAM4</td> <td>MPO-12/16, LC</td> <td>2019</td> </tr> <tr> <td>OSFP1600</td> <td>1.6 Tbps</td> <td>8 x 200G</td> <td>PAM4</td> <td>MPO, Dual LC</td> <td>2024/25</td> </tr> </tbody> </table>