Patent ID: 7878847

Claim:
An electrical connector, comprising: an insulative housing defining a first receiving cavity with a first tongue extending thereinto and a second receiving cavity with a second tongue extending thereinto, the second receiving cavity communicating with the first receiving cavity in an up to down direction and being essentially narrower than the first receiving cavity, the first tongue being parallel to the second tongue; a plurality of first contacts disposed on opposite first and second surfaces of the first tongue, each first contact having a flexible first contact portion cantileveredly protruding into the first receiving cavity and a first tail portion extending out of the insulative housing; and a plurality of second contacts disposed on a mounting surface of the second tongue, each second contact having a flat second contact portion exposed to the second receiving cavity and a second tail portion extending out of the insulative housing; wherein all first tail portions and second tail portions are arranged in a row; wherein all second tail portions are located at two sides of all first tail portions along a transverse direction of the insulative housing; wherein the second contacts comprise two pairs of second differential signal contacts and a second grounding contact between the two pairs of second differential signal contacts, and the second grounding contact has a said second contact portion and a pair of said second tail portions, and all first tail portions are located between the pair of second tail portions; wherein the first contacts comprise a power contact with a said first tail portion being closer to one second tail portion of the second grounding contact, and a pair of first differential signal contacts with a pair of said first tail portions being adjacent to another second tail portion of the second grounding contact, and a first grounding contact with a said first tail portion located between the first tail portions of the power contact and the pair of first differential signal contacts or the first tail portion of the power contact located between the first tail portions of the first grounding contact and the pair of first differential signal contacts; wherein each first contact has a first retaining portion extending backwardly from the first contact portion and a first connecting portion extending downwardly from the first retaining portion and connecting the first retaining portion and the first tail portion together, and each second contact has a second retaining portion extending backwardly from the second contact portion and a second connecting portion extending downwardly from the second retaining portion and connecting the second retaining portion and the second tail portion together, and all first and second connecting portions are arranged in a common vertical plane; wherein the second retaining portion of the second grounding contact defines a hollow at a middle portion thereof to prevent the second connecting portion of the second grounding contact from rebounding.