【选型】HXT44420助力数据中心200G QSFP56 10km光模块中DML驱动芯片选型
数据中心（Data Center）的200G QSFP56 10km的光模块的方案一般是使用4×50Gbps，而这种方案中的DML驱动也必须是4通道、速率50Gbps的芯片，所以方案有两种：一、50Gbps单芯片集成4通道；二、4个单通道的50Gbps芯片。下面是该方案的DML驱动部分的框图：
该方案中的对于DML驱动芯片要求有：
1. 整个光模块的封装是QSFP56，封装较小，散热面积小，需功耗小的芯片。
2. 封装小，需集成度高的芯片，最好4合1。
3. 支持PAM4和LR。
而我给其推荐IDT（Renesas收购）的DML驱动芯片HXT44420，它的优势有：
1. 功耗低至290mW/Ch，易于散热。
2. 4合1芯片，集成度高，有更好的RF性能。
3. 支持PAM4和LR.
4. 带APC（自动功率控制）功能，可以调节功率大小，从而提高激光管性能。
5. 带IIC接口，可以与外部MCU进行通信，便于控制。
由以上可知，HXT44420是数据中心200G QSFP56 10km光模块中DML驱动芯片的上上之选。
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型号- 93423,93422,93427,93724,93426,93723,93425,93722,93424,93727,93726,93725
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型号- 767-100-70,766A-100-9,766-130-1,766-130-2,766A-100-5,766A-100-3,766-19-1,766A-100-4,XLH320012.500000X,766A-100-1,XLH330026.000000X,766A-100-2,767-28.63636-32 FXO-HC536R-28.63636 XLH536028.636360I,XLH536035.328000I,XLH330135.000000X,766-20-55,XLH536042.500000I,XLH325100.000000X,767-100-64,XLH320012.000000X,FXO-HC325-156.25,766-20-40,766-20-42,FXO-HC330-1.843,766-20-48,767-100-67,XLH330026.000000I,767-28.63636-29 FXO-HC536R-28.63636 XLH536028.636360I,766-20-45,766-20-46,766-12.282-1,766-20-29,767-100-50,767-100-51,767-33.33333-17 FXO-HC536R-33.33333 XLH536033.333330I,767-63.79333-1,FXO-HC330-250,FXO-HC330R-21.7725,FXO-HC330R-21.7728,767-33.3333-15,FXO-HC330R-148.5,767-33.3333-16,767-59.942-1,XLH536066.666700I,767-33.3333-17,767-33.3333-11,766-20-37,767-75.5244-1,767-100-55,767-33.3333-12,766-20-38,767-100-56,767-33.3333-13,766-20-39,767-33.3333-14,XLH325150.000000X,767-100-59,XLH335016.368000X,767-33.33333-20 FXO-HC536R-33.33333 XLH536033.333330I,766-20-18,FXO-HC536R-50.006,766A-44-1,FXO-HC335-13.56,766-2.8-1,767-3.6864-2,FXO-HC320R-180,766-20-20,FXO-HC536R-49.152,XLH330019.200000X,767-100-45,767-100-46,XLH330016.934400X,767-29.4912-15,767-3.6864-5,767-3.6864-8,767-33.333333-19 FXO-HC536R-33.333333,FXO-HC536-49.9008,767-50-204,767-50-209,767-50-207,767-50-208,XLH335001.220000X,767-50-202,766-125-51,767-6-35,767-6-34,XLH330001.000000I,766-125-56,FXO-HC330R-12.288,XLH335013.560000X,FXO-HC536-62.5,XLH330001.000000X,FXO-HC536R-48.768,767-66.666666-1,XLH335001.024000X,XLH536027.120000I,FXO-HC335-218.025,FXO-HC325-100.25,XLH536045.000000I,FXO-HC330R-12.282,766-9.8304-1,766-125-40,XLH330028.636360I,766-125-49,XLH536045.000000X,XLH325100.250000X,XLH335002.000000X,767-100-91,767-100-92,767-50-225,767-100-93,767-50-226,766-250-9,767-100-94,766-250-7,767-100-96,767-33.33333-25 FXO-HC536R-33.33333 XLH536033.333330I,767-33.33333-33 FXO-HC536R-33.33333 XLH536033.333330I,767-50-220,767-50-223,767-50-224,767-50-221,767-50-222,766-35.46895-1,766-22.8-1,XLH335123.227000X,FXO-HC536R-54.24,XLH325106.250000X,766A-28.375-2,766A-28.375-1,766A-28.375-3,XLH536036.571428I,767-50-215,XLH335012.288800X,767-50-218,767-100-86,767-50-219,XLH325010.000000X,FXO-HC536R-33.3,767-50-211,767-6-25,767-28.63636-37 FXO-HC536R-28.63636 XLH536028.636360I,767-6-23,FXO-HC536R-66.666 FXO-HC536R-66.666,767-6-21,767-6-20,766-250-5,766-20-69,767-100-89,766-50-1,767-48-5,XLH330095.000000I,767-10-59,FXO-HC330R-40,766-10.24-1,767-10-58,767-10-55,767-10-54,767-10-50,767-10-53,767-10-52,FXO-HC536-40,767-28.63636-16 FXO-HC536R-28.63636 XLH536028.636360I,766-12-26,FXO-HC536-41,766-12-24,766-108-1,766-156.25-10,XLH330095.000000X,766-24-13,XLH320140.000000X,766-24-10,766-24-11,XLH335014.750000X,FXO-HC330R-38,XLH330048.000000I,XLH536034.368000I,766-24-18,766-24-19,XLH536050.400000X,766-24-14,766-108-2,FXO-HC330R-30,766-12-34,766-12-33,766-12-32,FXO-HC330R-32,767-10-49,766-12-30,767-10-43,767-10-45,XLH330048.000000X,XLH536033.300000I,FXO-HC536-50,767-10-41,FXO-HC536-52,766-12-35,FXO-HC536-54,767-54.24-1,FXO-HC536-44,FXO-HC536-45,FXO-HC536-48,FXO-HC536-66.666,766-37.5-3,766-15-1,766-37.5-1,FXO-HC330R-27,766-37.5-6,FXO-HC330R-26,766-37.5-7,766-37.5-4,766-37.5-5,767-33.33333-12 FXO-HC536R-33.33333 XLH536033.333330I,FXO-HC536R-65.536,766-159.29984-1 FXO-HC335-159.29984 XLH335159.299840X,FXO-HC330R-25,766-37.5-8,FXO-HC330R-24,766-37.5-9,XLH330004.000000I,766-200-19,FXO-HC330R-64,767-10-77,767-10-76,767-10-79,XLH330160.000000X,FXO-HC330R-60,767-10-78,766-200-13,767-10-73,766-200-12,766-200-11,767-10-75,766-200-10,767-31.45728-2,767-10-71,767-31.45728-1,767-10-70,FXO-HC536R-33.33333,FXO-HC330-33.333,767-38.4-10,XLH335180.000000X,FXO-HC330R-56,FXO-HC335-25,FXO-HC335-24,767-10-66,XLH536048.000000I,FXO-HC330R-50,XLH335024.000000X,767-10-68,766A-40-4,FXO-HC335-20,767-10-67,766A-40-7,767-10-62,766A-40-6,767-10-61,766A-40-8,766-12-17,766-12-16,XLH335130.000000X,766-12-14,XLH330004.000000X,FXO-HC335-166.5472,766-3.2-2,XLH536048.000000X,766-48-11,766-3.2-1,FXO-HC330R-48,766-14
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