Communications module edge connector having multiple communication interface pads
An edge connector design for use with a printed circuit board included in a communications module is disclosed. In one embodiment, the edge connector comprises a planar surface defining a terminal end of the printed circuit board, and a plurality of conductive contact pads arranged on the planar surface. The contact pads include first and second ground contact pads disposed adjacent opposite side portions of the planar surface and first and second power contact pads disposed proximate a central portion of the planar surface. First and second pairs of differential transmit data signal contact pads, as well as first and second pairs of differential receive data signal contact pads are also included, the pairs being disposed between one of the ground contact pads and one of the power contact pads. The edge connector is received by a female connector of a host device to connect the module to the host.
1. An optical transceiver module, comprising:
a shell partially containing a printed circuit board; and
an edge connector included on the printed circuit board, the edge connector including:
a plurality of conductive contact pads including:
a first ground contact pad;
a first power supply contact pad;
a first plurality of differential transmit data signal contact pads;
a second plurality of differential transmit data signal contact pads, the second plurality being linearly aligned with the first plurality of differential transmit data signal contact pads such that the second plurality of differential transmit data signal contact pads is disposed behind the first plurality of differential transmit data signal contact pads as viewed from a host connector corresponding to the edge connector;
a first plurality of differential receive data signal contact pads; and
a second plurality of differential receive data signal contact pads, the second plurality being linearly aligned with the first plurality of differential receive data signal contact pads such that the second plurality of differential receive data signal contact pads is disposed behind the first plurality of differential receive data signal contact pads as viewed from the corresponding host connector.
2. The optical transceiver module as defined in claim 1 , wherein the plurality of conductive contact pads further includes:
a second ground contact pad;
a second power supply contact pad;
an additional set of differential transmit and receive signal contact pads, including:
a third plurality of differential transmit data signal contact pads, the third plurality being linearly aligned with the first and second power supply contact pads; and
a third plurality of differential receive data signal contact pads, the third plurality being linearly aligned with the first and second ground contact pads.
3. The optical transceiver module as defined in claim 2 , wherein the first and second power supply contact pads are linearly aligned with one another so as to provide power cycling when the optical transceiver module is inserted into the corresponding host connector.
4. The optical transceiver module as defined in claim 1 , wherein the data signal contact pads are rectangular in shape, each having a length between about 1.2 and 1.4 mm and a width of about 0.55 mm.
5. The optical transceiver module as defined in claim 1 , wherein the optical transceiver module is hot swappable.
6. The optical transceiver module as defined in claim 1 , wherein the plurality of conductive contact pads are included on a first planar surface of the edge connector and wherein additional conductive contact pads are included on a second planar surface of the edge connector.
7. The optical transceiver module as defined in claim 1 , wherein the plurality of conductor pads further includes:
a second ground contact pad; and
a second power supply contact pad,
wherein the first and second ground contact pads are disposed adjacent opposite side portions of the edge connector and the first and second power supply contact pads are disposed proximate a central portion of the edge connector, and
wherein the first and second pluralities of differential transmit data signal contact pads are disposed between the first ground contact pad and the first power supply contact pad and the first and second pluralities of differential receive data signal contact pads are disposed between the second ground contact pad and the second power supply contact pad.
8. The optical transceiver module as defined in claim 1 , wherein the optical transceiver module further includes a transmit optical subassembly and a receiver optical subassembly that are each operably connected with the printed circuit board.
9. The optical transceiver module as defined in claim 1 , wherein the plurality of conductive contact pads are arranged to operably connect with a plurality of conductive pins in the corresponding host connector when the edge connector is connected with the corresponding host connector.
10. The optical transceiver module as defined in claim 1 , wherein a length of the first ground contact pad is greater than a combined length of any one of the pairs of differential data signal contact pads.
11. An optical transceiver module, comprising:
a shell partially containing a printed circuit board; and
an edge connector included on the printed circuit board, the edge connector including:
a plurality of conductive contact pads including:
a plurality of ground contact pads;
a plurality of power supply contact pads; and
a pair of differential data signal contact pads linearly aligned with one another along a longitudinal axis such that each of the contact pads in the pair of differential data signal contact pads is offset by an equal distance from at least one of the contact pads in the group comprising the ground and power supply contact pads wherein the pair of differential data signal contact pads are transmit data signal contact pads, and the edge connector further comprises a pair of differential receive data signal contact pads linearly aligned with one another along the longitudinal axis; and
wherein the pair of differential transmit data signal contact pads are disposed between a first one of the ground contact pads and a first one of the power supply contact pads and the pair of differential receive data signal contact pads are disposed between a second one of the ground contact pads and a second one of the power supply contact pads.
12. The optical transceiver module as defined in claim 11 , wherein the plurality of conductive contact pads are included on a first planar surface of the edge connector and wherein additional conductive contact pads are included on a second planar surface of the edge connector.
13. The optical transceiver module as defined in claim 11 , wherein the optical transceiver module further includes a transmit optical subassembly and a receiver optical subassembly that are each operably connected with the printed circuit board.
14. The optical transceiver module as defined in claim 11 , wherein the plurality of conductive contact pads are arranged to operably connect with a plurality of conductive pins in a mating connector of a host device when the edge connector is connected with the mating host device connector.
15. The optical transceiver module as defined in claim 11 , wherein a length of any one of the ground contact pads is greater than a combined length of the pair of differential data signal contact pads.
16. The optical transceiver module as defined in claim 11 , wherein the plurality of conductive contact pads are arranged in no more than six separate columns disposed along a dimension of the printed circuit board substantially perpendicular to the longitudinal axis along which the pair of data signal contact pads are linearly aligned.