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An electrical connector ( 1 ) includes a dielectric housing ( 2 ) defining a number of parallel slots ( 23 ), a number of terminals ( 5, 5′, 7 ) arranged in rows in the housing, and a number of parallelly arranged circuit boards ( 3 ) received in corresponding slots of the housing. The termin

An electrical connector ( 1 ) includes a dielectric housing ( 2 ) defining a number of parallel slots ( 23 ), a number of terminals ( 5, 5′, 7 ) arranged in rows in the housing, and a number of parallelly arranged circuit boards ( 3 ) received in corresponding slots of the housing. The terminals have contacting beams ( 52, 52′, 72 ) electrically connecting with the circuit boards, and tail portions ( 54, 54′, 74 ) for electrical connection to a printed circuit board on which the connector is mounted. A shield member ( 4, 4 ′) substantially encloses the housing and the circuit boards. The shield member includes a number of inwardly extruded lances ( 45 ) located between adjacent circuit boards and electrically contacting with the circuit boards.

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1. An electrical connector for mounting to a printed circuit board, comprising:a unitary dielectric housing defining a plurality of parallel slots;a plurality of terminals arranged in rows in the slots;a plurality of parallelly arranged circuit boards received in corresponding slots of the housing,

1. An electrical connector for mounting to a printed circuit board, comprising:a unitary dielectric housing defining a plurality of parallel slots;a plurality of terminals arranged in rows in the slots;a plurality of parallelly arranged circuit boards received in corresponding slots of the housing, each circuit board having conductive traces electrically connecting with the terminals; anda shield member substantially enclosing the housing and the circuit boards, the circuit boards being retained by and between the shield member and the housing. 2. The electrical connector as claimed in claim 1, wherein the shield member comprises a plurality of inwardly extruded lances located between adjacent circuit boards. 3. The electrical connector as claimed in claim 2, wherein the conductive traces of each circuit board comprise signal traces on one side thereof and grounding traces on two opposite sides thereof, and the lances are electrically contacted with the grounding traces of the circuit boards to achieve a grounding purpose. 4. The electrical connector as claimed in claim 3, wherein the shield member is configured as a substantially rectangular box and is formed with grounding fingers for electrically connecting to a printed circuit board. 5. The electrical connector as claimed in claim 4, wherein the shield member comprises a top plate covering a top of the parallel arranged circuit boards and a rear plate covering a rear of the housing and the circuit boards, the grounding fingers extending downwardly from the rear plate. 6. The electrical connector as claimed in claim 4, wherein the shield member comprises a top plate with the extruded lances being stamped therefrom and a pair of side plates extending from opposite lateral edges of the top plate. 7. The electrical connector as claimed in claim 6, wherein the side plates comprise a pair of inwardly extending spring tangs electrically contacting with opposite outermost circuit boards. 8. The electrical connector as claimed in claim 1, wherein the housing defines a plurality of recesses in a bottom thereof, and the shield member comprises a plurality of fastening tabs retained in corresponding recesses. 9. The electrical connector as claimed in claim 1, wherein the housing comprises a front tongue at a lower portion of one end thereof, the front tongue defining a plurality of grooves aligned with corresponding slots, and wherein the circuit boards have mating portions with lower edges received in corresponding grooves. 10. The electrical connector as claimed in claim 9, wherein the housing comprises a rear support at an opposite end thereof, the support defining a plurality of channels aligned with corresponding slots, and wherein the circuit boards have rear edges received in corresponding channels. 11. The electrical connector as claimed in claim 1, further comprising an alignment pin, and wherein each of the circuit boards defines a through hole, the alignment pin inserting through the housing and the through holes of the circuit boards. 12. The electrical connector as claimed in claim 11, wherein the through holes of the circuit boards are plated through holes which are electrically connected to corresponding conductive traces on the circuit boards, and the alignment pin is a metal pin electrically contacting with the circuit boards via the plated through holes. 13. The electrical connector as claimed in claim 1, wherein the rows of the terminals and the circuit boards are alternatingly arranged. 14. The electrical connector as claimed in claim 13, wherein each row of the terminals comprises plural differential pairs of signal terminals and plural pairs of grounding terminals, the pairs of the signal and the grounding terminals being alternatingly arranged. 15. The electrical connector as claimed in claim 14, wherein each terminal comprises a contacting beam electrically connecting with a corresponding conductive trace, a tail portion for electrical connection to a printed circuit board and an intermediate portion interconnecting the contacting beam and the tail portion, the contacting beams of the differential pair of the signal terminals extending upwardly from the intermediate portions adjacent innermost edges. 16. The electrical connector as claimed in claim 15, wherein each terminal comprises a press-fit tail opposite to the contacting beam, the press-fit tail extending beyond a bottom of the housing for electrical connection to a printed circuit board. 17. The electrical connector as claimed in claim 1, wherein the circuit boards have mounting portions received in corresponding slots of the housing, and the terminals are soldered to the mounting portions. 18. An electrical connector comprising:a unitary insulative housing defining a plurality of parallel slots therein;plural rows of terminals disposed in the slots, respectively;a plurality of parallel arranged circuit boards received in the corresponding slots, respectively, each of said circuit boards including conductive traces located in the corresponding slot and mechanically and electrically engaged with the corresponding terminals, respectively; anda metallic shell enclosing both said housing and said printed circuit boards, and defining a plurality of parallel lances on a top wall thereof; whereinupper portions of said printed circuit boards are respectively retained by the lances, and lower portions of said printed circuit boards are respectively retained in the slots. 19. The connector as claimed in claim 18, wherein all said housing is vertically spaced from the top wall and only retains the lower portions of the printed circuit board. 20. The connector as claimed in claim 19, wherein said terminals are soldered to the lower portions of the corresponding printed circuit boards.