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Gemini Mezz Connector with 122 shielded differential pairs.

Gemini Mezz Connectors

Gemini Mezz Connectors provide compact, high-speed and high-density board-to-board connections that ensure exceptional signal integrity at data rates of 224Gbps+. With fully shielded differential pairs (DPs), a grid-based layout and a low-profile, self-mating hermaphroditic design, these mezzanine connectors enhance design flexibility and support cost-effective architectures for high-performance applications.

Circuits Data Rate Stack Height DPs per Square Inch
Up to 185 DPs 224Gbps+ PAM-4 5.00mm Up to 63

Features and Benefits


Meeting AI-driven capacity demands means data centers must move more high-speed signals between stacked PCBs without using additional space. The need for more differential pairs (DPs) in compact form factors, combined with rising data rates, increases the difficulty of minimizing signal loss and crosstalk enough to meet stringent loss budgets at speeds of 224Gbps or higher.

Next-generation mezzanine connectors must employ features that reduce the effects of EMI and crosstalk to improve signal integrity and impedance control at high speeds. To control costs and fit within space-constrained architectures, these connectors must also minimize connector footprint and stack height. Additionally, self-mating designs can simplify inventories and streamline assembly work for faster production.

Low-profile, hermaphroditic Gemini Mezz Connectors use fully shielded DP terminations to enhance signal integrity and reduce EMI, crosstalk and impedance variation effects at next-generation data rates of 224Gbps+. The design’s grid-based structure allows for more flexible routing, simplifying PCB design and enabling lower-cost architectures. Various potential circuit counts up to 185 DPs deliver high-density, high-performance solutions for a variety of applications.

High-Speed 224G Mezzanine Connectors

Addressing AI-driven demands for high-speed board-to-board connections, the Gemini Mezz Connector has a low-profile design that achieves a board-to-board stack height of 5.00mm and offers up to 185 DPs, enabling high-density connectivity at 224Gbps+ in space-constrained applications.

Top-down view of a 122-differential pair Gemini Mezz Connector showing the grid layout.

Shielded Differential Pair Terminals

The DP terminals in the Gemini Mezz Connector design are fully shielded, improving crosstalk and EMI performance at high data rates of 224Gbps+. This superior signal integrity helps accommodate tight loss budgets and enhances channel performance at high data transmission rates.

Gemini Mezz Connector with 24 shielded differential pairs.

Hermaphroditic Design with BGA Termination

The hermaphroditic Gemini Mezz Connector shortens the bill of materials (BOM). The grid-based structure, with industry-standard ball grid array (BGA) termination, eases routing constraints and reduces PCB construction costs by minimizing the need for additional breakout layers.

Side view of hermaphroditic (self-mating) Gemini Mezz Connectors showing the stack height and ball grid array termination.

Minimizes crosstalk and reduces the impacts of EMI
Fully shielded DP terminals improve signal strength in electrically noisy environments, enabling superior signal integrity performance at 224Gbps+ data rates.

Reduces PCB costs by simplifying routing
The grid-based DP structure helps simplify PCB design and reduces the need for additional breakout layers by improving routing flexibility.

Streamlines assembly processes
Industry-standard BGA termination simplifies termination to the board and helps reduce costs.

Saves space without sacrificing performance
The low-profile 5.00mm stack height permits use in compact and low-clearance designs by reducing board-to-board space requirements.

Eases inventory management challenges
The self-mating hermaphroditic design simplifies the BOM and minimizes tooling requirements.

Shortens development times
The grid-based layout and potential for various connector footprints enhance design flexibility.

Datasheets and Guides


Applications by Industry


Domain control units
Electronic control units
Zonal control units

Industrial robotics
Drone and unmanned aerial vehicle control units
Personal robots

224G
High-performance computing
Interposer applications
Networking equipment
Server racks
Storage racks

Networking equipment
Telecommunications infrastructure

This is not a definitive list of applications for this product. It represents some of the more common uses.

Frequently Asked Questions


What are Gemini Mezz Connectors?

Gemini Mezz Connectors are compact (3.00mm pitch), low-profile, self-mating hermaphroditic board-to-board mezzanine connectors that provide up to 185 differential pairs (custom DP counts possible). The fully shielded contact design enables exceptional signal integrity, minimizes crosstalk and EMI, and improves impedance control at high data rates of 224Gbps+.

What makes Gemini Mezz Connectors different from the competition?

Unlike many other mezzanine connectors, the differential pair contacts in the Gemini Mezz design are fully shielded. This improves signal integrity and minimizes signal loss, improving channel performance at high speeds, and supporting next-generation data rates.

How do Gemini Mezz Connectors create value for manufacturers?

The grid-based connector layout helps reduce costs and PCB complexity by improving routing flexibility, minimizing the need for additional breakout layers that result in more complex—and more expensive—boards. The low-profile 5.00mm stack height enables more compact board stacking, eliminating costly expansions to accommodate upgrades, while the hermaphroditic design simplifies inventory costs.