The Rambus 28G MPS PHY is a comprehensive IP solutions that delivers enterprise-class performance across the challenging signaling environments typical of networking and server systems. With high performance and multi-protocol compatibility, the PHY supports data rates from 1.25 to 28.1 Gbps across copper and backplane channels with more than 30dB channel insertion loss in a wide range of industry-standard interconnect protocols. It features application-specific optimization enabled by an efficient and scalable architecture with adaptive and programmable receive equalization, and support for transmit FIR adaptation.
The 28G MPS PHY is designed with a system-oriented approach, taking the interface, interconnect and channel into account when optimizing performance and features to maximize flexibility in today’s most challenging system environments and applications. This makes the PHY ideal for many long-reach, copper and backplane system environments.
Maintaining signal integrity has become increasingly difficult as data rates moves past 28Gbps to 56Gbps and beyond. Up to 28Gbps rates, NRZ is the preferred and standardized encoding scheme which consists of 1’s and 0’s. NRZ is also referred to as PAM2 (pulse amplitude modulation, 2-level), due to its two amplitude levels which contain 1 bit of information in every symbol. With serial data rates hitting 56 Gb/s per channel, signal impairments caused by increased bandwidth has prompted the high-speed serial data industry to adopt PAM4, or 4-level pulse amplitude modulation.
|Protocol||Data Rate (Gbps)||Application|
|100GBASE-KR4||25.78125||Copper backplane networking|
|10GBase-KR||10.3125||Copper backplane networking|
|CEI-28G-VSR||19.6-28.1||Telecom and networking|
|CEI-28G-SR||19.9-28.05||Telecom and networking|
|CEI-28G-MR||19.9-28.1||Telecom and networking|
|CEI-25G-LR||19.9-25.8||Telecom and networking|
|CEI6-SR||4.976-6.375||Telecom and networking|
|CEI11-SR, LR||9.95-11.2||Telecom and networking|
|XAUI/2xXAUI||3.125, 6.25||Chip-to-Chip connectivity|
|Interlaken 6 G||4.976-6.375||Networking|
|JESD 204B/C||3.125 – 25||High-speed data converters connectivity|
|SFI / XFI||10.3125||XFP and SFP+ optical modules|
|CPRI||1.22 – 24.33||Wireless base stations|
|Infiniband EDR||25.78125||High-performance server connectivity|
|Infiniband FDR||14.0625||High-performance server connectivity|