Electrical connector with improved contact arrangement

An electrical receptacle for insertion of a compatible plug, comprising:

• an insulative housing comprising a base portion, and a tongue portion protruding forwardly beyond the base portion and being parallel to the PCB, the tongue portion defining a plurality of ribs formed on one side thereof and being adjacent to a front edge thereof, a plurality of depressions each formed between an adjacent pair of ribs, and a plurality of passageways formed on the side of the tongue portion and recessed from a mating surface thereof;
• a metal shell attached to the insulative housing and cooperating with the tongue portion to define a receiving space for receiving the plug;
• and
• a plurality of contacts comprising first contacts having elastic first contact portions being movably received in the passageways and protruding beyond the mating face for mating with the plug, and second contacts having stiff second contact portions received in the depressions, each second contact portion disposed between the adjacent pair of ribs and having a planar outer surface exposed to the receiving space for mating with the plug;
• wherein the ribs protrude beyond the outer surfaces of the second contact portions for filling in a gap between the tongue portion and a tongue plate of the plug when the plug is inserted into the receptacle;
• wherein the ribs extend forwardly to the front edge of the tongue portion, and the depressions extend forwardly through a front edge of the tongue portion, each of the rib define a side surface being coplanar with the mating surface of the tongue portion;
• wherein the first contacts have first tail portions for being mounted on a PCB, and first connecting portions extending along the tongue portion and being located between the first contact portions and the first tail portions, the second contacts having second tail portions for being mounted on the PCB, and second connecting portions located between the second contact portions and the second tail portions and being parallel to the first connecting portions in a height direction of the tongue portion;
• wherein the first and second tail portions are parallel to the tongue portion and arranged in only a single row along a transverse direction to be mounted onto a surface of the PCB directly, the first contacts includes a first pair of differential contacts, and a first grounding contact and a power contact located at two sides of the first pair of differential contacts, the second contacts includes a second pair of differential contacts, a third pair of differential contacts, and a second grounding contact located between the second and third pair of differential contacts;
• wherein the tail portion of the power contact is arranged between the tail portions of the second pair of differential contacts, the tail portion of the second grounding contact is arranged between the tail portions of the first pair of differential contacts, the tail portion of the first grounding contact is arranged between the tail portions of the second pair of differential contacts.

An electrical connector assembly comprising:

• an insulative housing defining a mating tongue having a mating face and an opposite face thereof;
• a metallic shell attached to the housing and cooperating with the mating tongue to define a mating port;
• a first set of contacts having a first differential pair of signal contacts and a power contact and a first grounding contact at two opposite sides of the first differential pair of signal contacts, contact sections of said first set of contacts being located on the mating face in a first position along a front-to-back direction;
• a second set of contacts having second and third differential pairs of signal contacts and a a second grounding contact therebetween, contact sections of said second set of contacts being located on the mating face in a second position along said front-to-back direction in front of said first position;
• tails of the first set of contacts and those of the second set of contacts being arranged in front, middle and rear transverse rows, respectively;
• wherein
• the tails of the second differential pair of signal contacts, those of the first differential pair of signal contacts, and those of the third differential pair of signal contacts are arranged in a sequence along a transverse direction perpendicular to said front-to-back direction, under a condition that crosstalk between the second differential pair of contacts and the first differential contacts is reduced by the power contact and the second grounding contact, and crosstalk between the third differential pair of contacts and the first differential pair of contacts is reduced by the first grounding contact and the second grounding contact;
• wherein
• a total amount of both said first contacts and said second contacts are nine wherein at least one of the first tail portion of said power contact, the first tail portion of said first grounding contact and the second tail portion of said second grounding contact is located in the middle transverse row;
• wherein
• both the first tail portions of said first contacts and the second tail portions of the second contacts are essentially arranged symmetrically with regard to the second tail portion of the second grounding contact in said transverse direction while asymmetrically in the front-to-back direction.