MaxLinear Launches Industry's First 400Gbps PAM4 DSP SoC with Integrated Laser Drivers - Le Cordacord - Focus on the Fiber Optics Industry
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MaxLinear Launches Industry's First 400Gbps PAM4 DSP SoC with Integrated Laser Drivers

2018-01-28    Cfol

Carlsbad, California – Jan. 25, 2018 - MaxLinear, Inc. (NYSE:MXL), a leading provider of radio frequency (RF), analog and mixed-signal integrated circuits for the connected home, wired and wireless infrastructure, and industrial and multimarket applications, today announced the Telluride family (MxL935XX) of 400Gbps pulse-amplitude-modulation (PAM4) digital signal processing (DSP) systems-on-chip (SoC) solutions addressing the high-speed optical interconnect needs of mega-scale cloud and enterprise data centers.
 
The MxL935XX Telluride family of devices is the world’s first DSP SoCs with integrated electro-absorption modulated laser (EA-EML) drivers for 400Gbps optical interconnects.  The MxL935XX device is the key component for system vendors to be able to develop a 400Gbps optical interconnect module in a compact form factor for intra-datacenter applications with a transmission distance up to 2 Kilometers.
 
The MxL935XX 16nm CMOS PAM4 DSP SoC consumes an extremely low power of 6.7W, which includes the integrated EA-EML driver power dissipation. The minimal power consumption of the MxL935XX meets the stringent power constraints of 400Gbps optical module form-factors, namely QSFP-DD, OSFP and COBO devices.
 
MaxLinear’s Telluride family of SoCs are key components in the development of high speed mega-scale data centers based on 400Gbps optical interconnects. MaxLinear is currently sampling the device to optical module vendors who are actively developing 400Gbps solutions that are expected to launch into mass production in the latter half of 2018.
 
The MxL935XX is a family of highly versatile PAM4 DSP SoCs capable of one, two or four lanes of 100Gbps optical connectivity combined with a flexible 25G NRZ and 50G PAM4 electrical interface supporting multiple generations of switch ASICs. The multi-lane capabilities allow the MxL935XX devices to be used in a wide-range of optical interconnects supporting 100Gbps, 200Gbps, and 400Gps optical fiber data speeds in cloud mega-scale and enterprise data centers.
 
The integrated laser drivers in the MxL935XX family directly interface with the external optical lasers and eliminate the need for expensive external high-frequency components required for laser driver and modulator bias. The superior integration of system-level functionality in MxL935XX devices enable significant cost reductions even in today’s ongoing 100Gbps deployments.
 
"The exploding data traffic, and the demand for high-speed data have placed an enormous burden on the cloud and enterprise data network infrastructure. This is, in turn, not only compressing the network upgrade cycle, but is also accelerating the need to deploy 400Gbps optical networks inside mega-scale cloud and enterprise data centers," said Dr. Kishore Seendripu, CEO of MaxLinear. "With the recent announcement of the availability of next-generation switch ASICs that support 50Gbps PAM4 I/Os, we believe the growth trajectory for PAM4 DSP-based 400Gbps optical fiber interconnect solutions is at an inflection point. The cost pressure and thermal constraints of 400Gbps networks necessitate the use of new optical interconnects based on single-lane 100Gbps optical wavelength technology.
 
"Our Telluride MxL935XX 16nm CMOS SoC family, with integrated EA-EML laser drivers, reduced external components, and superior link-margin performance, is perfectly positioned to enable this leapfrogging industry transition. We believe that, currently, the total addressable market for 100Gbps and 400Gbps optical interconnect modules greatly exceeds 10 million units annually, not including the anticipated future rapid growth driven by the exploding internet traffic," concluded Dr. Kishore Seendripu, CEO of MaxLinear.
 
Technical Details
 
The first SoCs to be available from the Telluride family are the MxL93542 and MxL93543, which feature several operating modes that can connect to multiple generation of switch ASICs (128x25G NRZ, 256x25G NRZ or 256x50G PAM4) enabling 3.2Tbps, 6.4Tbps or 12.8Tbps front panel capacity per data center rack unit. These different operating modes span a variety of optical module form factors such as QSFP28, SFP-DD, QSFP-DD, OSFP and COBO.
 
For modes where the MxL93542 and MxL93543 interface with a legacy 25G NRZ switch ASIC, the corresponding forward error correction (FEC) functionality required for PAM4 optics is integrated into the device. Two separate instantiations of the FEC engine are available on-chip to support two distinct lanes of 100Gbps optics.
 
The integrated laser driver in the MXL93542 delivers greater than 1.8V of single-ended driver output swing necessary for EA-EML lasers. This output swing easily meets the optical modulation amplitude (OMA) specification requirements across the wide operating temperature and bias ranges of all EA-EML lasers. The chip package also includes all the high frequency components required for driver & modulator biasing.
 
The second version of the SoC, the MxL93543, which delivers 800mV of peak-to-peak differential driver output swing, can be easily paired with an external laser driver implemented in alternate optical technologies such as silicon photonics.
 
MaxLinear has engineered a very high-performance DSP engine in both the transmit and receive data paths. The resulting superior link-margin enables single-lane 100Gps optical wavelength technology by mitigating many of the limitations of mass production optical components.
 
The devices feature a comprehensive digital pre-distortion (DPD) engine in the transmit direction to compensate for laser non-linearity, and to cancel packaging limitations that cause reflections and bandwidth degradation at these extremely high signal frequencies. On the receive path, the DSP includes an auto-adaptive signal enhancement engine, which integrates a continuous time linear equalizer (CTLE), automatic gain control (AGC), a feed forward equalizer (FFE), and a decision feedback equalizer (DFE).
 
Availability
The MxL93542 and MxL93543 are sampling now to leading optical module manufacturers. More information is available by emailing sales@maxlinear.com.
 
About MaxLinear, Inc.
MaxLinear, Inc. (NYSE:MXL), a leading provider of radio frequency (RF), analog and mixed-signal integrated circuits for the connected home, wired and wireless infrastructure, and industrial and multimarket applications. MaxLinear is headquartered in Carlsbad, California. For more information, please visit www.maxlinear.com.