SAS 3.0 2x and 4x 12Gb/s MultiLink Connector Proposal September 13, 2010 Page 1

Design Requirements Provided by STA SAS MultiLink 12Gb/s 2x & 4x Connectors Electrical Parameters: per T r1 Mechanical Parameters: Extend/enhance SFF-8482 electrical performance to 12Gb/s New 2x and 4x mechanical designs must be backwards compatible Contacts may not rub on the plastic housing Must conform to the form-factor defined in SFF-8223 Page 2

Leverage the current SAS 2x 6Gb/s connector specification SFF-8482 MultiLink 2x 12Gb/s Design Plug Contacts The power contacts may remain the same for all current designs and for all future designs keeping their current 1.27mm pitch. - Molex contacts rated at 2.5A/contact The signal contacts for ports 1 & 2 are redesigned to achieve 12Gb/s while retaining their current 0.8mm pitch Plug Tongue Modified to avoid the additional contacts that are added to the new 4x Receptacle Page 3 Design Strategy SAS MultiLink 12Gb/s 2x & 4x Connectors

Leverage the current SAS 2x 6Gb/s connector specification SFF-8482 MultiLink 4x 12Gb/s Designs Receptacle Contacts The power contacts may remain the same for all current designs and for all future designs and retain their current 1.27mm pitch. The redesigned 12Gb/s signal contacts for ports 1 & 2 are also loaded into ports 3 and 4 and retain their current 0.8mm pitch. The contacts for ports 3 and 4 are located such that they DO NOT prevent future expansion within the interface. Plugs Modified to mate with the additional contacts added to the 4x receptacle Page 3 SAS MultiLink 12Gb/s 2x & 4x Connectors Design Strategy

10-123r1 T10 RequirementsMolex Performance TDR 90 – 110 Ohms at T R =35ps(10-90%) Ohms Differential Return loss -12dB to 6GHz-18dB to 6GHz Insertion Loss -3dB to 6GHz (includes 2-inch trace on each side) -3dB to 6GHz Common Mode Return Loss -5dB to 6GHz Power-Sum Isolation -35dB to 6GHz Performance Summary SAS MultiLink 12Gb/s 2x & 4x Connectors Page 5

SAS 3.0 MultiLink - 12Gb/s, 2x and 4x Solutions Page 4 2X 6Gb/s – 29 Pins; Redesigned contacts & New Common Housing Common Port 1 Signal (7 Pins) Common Port 2 Signal (7 Pins) Common Power Port (15 Pins) Common Port 1 Signal (7 Pins) Common Port 2 Signal (7 Pins) Common Power Port (15 Pins) 2X 12Gb/s – 29 Pins; Redesigned contacts & New Common Housing Common Port 1 Signal (7 Pins) Common Port 2 Signal (7 Pins) Common Power Port (15 Pins) Port 3 & Port 4 Signals (13 Pins) 4X 12Gb/s – 43 Pins; New Common Housing Common Port 1 Signal (7 Pins) Common Port 2 Signal (7 Pins) Common Power Port (15 Pins) 2X 6Gb/s – 29 Pins; Legacy SFF-8482 contacts & housing

Design Strategy SAS 3.0 Plug – New Vs Legacy Legacy Plug Outline of Legacy Plug Page 5

Design Strategy New Common Receptacle Compatibility Page 6 Common Port 1 Signal (7 Pins) Common Port 2 Signal (7 Pins) Common Power Port (15 Pins) 2X 6Gb/s – 29 Pins; Redesigned contacts & New Common Housing Common Port 1 Signal (7 Pins) Common Port 2 Signal (7 Pins) Common Power Port (15 Pins) 2X 12Gb/s – 29 Pins; Redesigned contacts & New Common Housing Common Port 1 Signal (7 Pins) Common Port 2 Signal (7 Pins) Common Power Port (15 Pins) Port 3 & Port 4 Signals (13 Pins) 4X 12Gb/s – 43 Pins; New Common Housing Fully Loaded Form-factor New Common Housing

Page 9 A7 A12 A16 A17 A15 A14 White Outline shows keep out area Keep-out areas Design Strategy SAS MultiLink 12Gb/s 2x & 4x Connectors Design Strategy Conforms to SFF-8223 Formfactor for 2.5” HDD’s

Receptacle Plastic blade used for 500 cycles durability Objective To determine the wearing of the Plastic Housing (Plug) when rubbing by a Gold plated spring contact of a Serial Attached SCSI receptacle Test Plan 4 pieces of receptacle connectors (30u” Au plated) were being mated to 4 pieces of plastic blade (without terminals) for 500 cycles (see Figure 1 below) 2 pieces of the plastic blade are molded with 30% GF material 2 pieces of the plastic blade are molded with a higher GF material Terminals rubbing Plastic Housing Page 12

Observations 1.Gold debris were collected on the plastics blades (Plug) for both the 30% and the higher GF Material 2.Obvious wear tracks can also be seen on the plastic blade (Plug) Conclusions 1.Gold debris collected on the plastic housing (Plug) will mean less Gold on the Receptacle. This will affect long term reliability of the Drive 2.Wear tracks on the plastic housing (Plug) will cause uneven surface on the plastic plug, which may cause terminals in the receptacle to stub / deformation during mating process Higher GF Material30% GF Material Wear tracks Gold Debris Wear tracks Terminals rubbing Plastic Housing Page 13

Maximum Current Capacity Molex Power Pins are rated at a maximum of 2.5A per Pin Please refer to the attached CSA Certification Page 16 SFF-8482 specification power pin rating requirement is 1.5A per pin

Design Requirements SAS MultiLink 12Gb/s 2x & 4x Connectors Electrical Parameters per T r1 Mechanical Parameters: Extend/enhance SFF-8482 electrical performance to 12Gb/s New 2x and 4x mechanical designs must be backwards compatible Contacts may not rub on the plastic housing Must conform to the form-factor defined in SFF-8223 Page 10

SFF Port SAS – 3/6Gb/s Scales to: SFF Port SAS – 3/6/12Gb/s SFF Port SAS – 3/6/12Gb/s SFF-xxxx x Port SAS – 3/6/12 Gb/s Page 8 Design Strategy - Plus SAS MultiLink 12Gb/s 2x & 4x Connectors

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