Dual-Row Plug and Receptacle Assembly for Backward-Compatible QSFP Density
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Solution Overview
Problem
Existing QSFP-style connectors lack the front panel density required for high data throughput applications while maintaining compatibility with existing designs, leading to the need for new connector designs that can support increased bandwidth without scrapping existing cable assemblies.
Innovation Solution
A receptacle assembly with two connection regions, each with opposing rows of terminals, allowing for higher density connections by being compatible with both single and dual row pad configurations, and a plug assembly with a mating blade featuring multiple rows of pads to support increased data rates, while maintaining backward compatibility with existing QSFP designs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If QSFP-style connectors are used, then compatibility with existing cable assemblies is maintained, but front panel density is insufficient
Solution Approach 1:
The connector transitions from a single-row pad configuration to a dual-row pad configuration on the mating blade. This dimensional change allows twice the number of connections to be made within the same physical footprint, effectively doubling the front panel density while maintaining compatibility with existing single-row connectors through the first connection region.
Solution Approach 2:
The connector is divided into two separate connection regions: a first connection region with terminals configured to mate with a single row of pads (maintaining backward compatibility), and a second connection region with terminals configured to mate with a second row of pads (enabling higher density). This segmentation allows the same connector to support both legacy and high-density applications.
2Area of stationary object
If new connector designs with smaller pitches are proposed, then front panel density is improved, but compatibility with existing QSFP designs is lost
Solution Approach 1:
The connector is designed with universal compatibility to support multiple connection types. The first connection region maintains standard QSFP terminal spacing and configuration to work with existing single-row connectors, while the second connection region provides additional terminals for dual-row high-density applications. This multi-functionality allows a single connector design to serve both legacy and next-generation requirements.
Solution Approach 2:
The connector adapts its functionality based on the inserted plug assembly. When a single-row plug is inserted, only the first connection region is activated. When a dual-row plug is inserted, both connection regions are activated. This dynamic adaptation allows the system to optimize for either compatibility or high density depending on the application.
3Productivity
If higher density connections are implemented, then data throughput is increased, but device complexity increases
Solution Approach 1:
The terminal array is segmented into two independent connection regions with distinct terminal configurations. The first connection region uses standard terminal spacing compatible with existing designs, while the second connection region uses adjusted terminal spacing for high-density connections. This segmentation allows the complex dual-row functionality to be implemented in a modular, manageable way that reduces design complexity compared to a completely new high-density connector design.
Data Source
AI summary
A connector system for a pluggable IO connector is disclosed that includes a plug with two rows of pads on two sides of a mating blade and a receptacle with two connection regions that is configured to engage the two rows of pads. In an embodiment the connector system can support double the data bandwidth of a typical connector, such as a QSFP connector, while allowing for backward compatibility with convention plug assemblies that have a single row of pads on each side the mating blade.