Pin arrangement and electronic assembly
A pin arrangement adapted to a FPC connector is provided. The pin arrangement includes a pin lane. The pin lane includes a pair of ground pins, a pair of differential pins and at least one not-connected (NC) pin. The differential pins are located between the pair of ground pins. The at least one NC pin is located between the pair of differential pins or between one of the pair of ground pins and one of the pair of differential pins adjacent thereto. By adding the at least one NC pin between the pair of differential pins and/or between the differential pin and the ground pin adjacent thereto, a distance between each of the pair of the differential pins and/or between the differential pin and the ground pin is increased, and thus a differential characteristic impedance of the pair of differential pins is raised to reduce the impact of impedance mismatch.
1. A pin arrangement, adapted to a flexible printed circuit connector, the pin arrangement comprising:
a pin lane, comprising:
a pair of ground pins;
a pair of differential pins, located between the pair of ground pins;
at least one middle not-connected pin, located between the pair of differential pins; and
a pair of side not-connected pins, wherein each of the pair of the side not-connected pins is located between one of the pair of ground pins and one of the pair of differential pins adjacent thereto and is not located between the pair of differential pins.
2. The pin arrangement as claimed in claim 1 , wherein the at least one middle not-connected pin is a floating pin.
3. The pin arrangement as claimed in claim 1 , wherein the pair of side not-connected pins are floating pins.
4. The pin arrangement as claimed in claim 1 , wherein the pair of differential pins is adopt to USB, SATA, HDMI, PCIE or DP.
5. The pin arrangement as claimed in claim 1 , further comprising:
another pin lane, comprising:
another pair of ground pins; and
another pair of differential pins, located between the another pair of ground pins.
6. The pin arrangement as claimed in claim 5 , wherein the another pin lane further comprises:
another at least one middle not-connected pin, located between the another pair of differential pins.
7. The pin arrangement as claimed in claim 5 , wherein the another pin lane further comprises:
another pair of side not-connected pins, wherein each of the another pair of the side not-connected pins is located between one of the another pair of ground pins and one of the another pair of differential pins adjacent thereto, and is not located between the another pair of differential pins.
8. An electronic assembly, comprising:
two printed circuit boards;
two flexible printed circuit connectors, respectively mounted on the printed circuit boards; and
a flexible printed circuit, having two contact portions respectively connected to the flexible printed circuit connectors, so as to electrically connect the flexible printed circuit connectors,
wherein each of the flexible printed circuit connectors has a pin arrangement, and the pin arrangement comprises:
a pin lane, comprising:
a pair of ground pins;
a pair of differential pins, located between the pair of ground pins;
at least one middle not-connected pin, located between the pair of differential pins; and
a pair of side not-connected pins, wherein each of the pair of the side not-connected pins is located between one of the pair of ground pins and one of the pair of differential pins adjacent thereto and is not located between the pair of differential pins.
9. The electronic assembly as claimed in claim 8 , wherein the flexible printed circuit has a plurality of flexible printed circuit traces and a plurality of flexible printed circuit pads, and the flexible printed circuit pads respectively contacting the at least one middle not-connected pins are not connected to each other through the flexible printed circuit traces.
10. The electronic assembly as claimed in claim 8 , wherein the printed circuit board has a plurality of printed circuit board pads and a plurality of printed circuit board traces, and the printed circuit board pad connecting to the at least one middle not-connected pin is not connected to the printed circuit board traces.
11. The electronic assembly as claimed in claim 8 , wherein the flexible printed circuit has a plurality of flexible printed circuit traces and a plurality of flexible printed circuit pads, and the flexible printed circuit pads respectively contacting the side not-connected pins are not connected to each other through the flexible printed circuit traces.
12. The electronic assembly as claimed in claim 8 , wherein the printed circuit board has a plurality of printed circuit board pads and a plurality of printed circuit board traces, and the printed circuit board pad connecting to the side not-connected pin is not connected to the printed circuit board traces.
13. The electronic assembly as claimed in claim 8 , further comprising:
another pin lane, comprising:
another pair of ground pins; and
another pair of differential pins, located between the another pair of ground pins.
14. The electronic assembly as claimed in claim 13 , wherein the another pin lane further comprises:
another at least one middle not-connected pin, located between the another pair of differential pins.
15. The electronic assembly as claimed in claim 13 , wherein the another pin lane further comprises:
another pair of side not-connected pins, wherein each of the another pair of the side not-connected pins is located between one of the another pair of ground pins and one of the another pair of differential pins adjacent thereto and is not located between the another pair of differential pins.
16. A pin arrangement, adapted to a flexible printed circuit connector, the pin arrangement comprising:
a pin lane, comprising:
a pair of ground pins;
a pair of differential pins, located between the pair of ground pins; and
at least one not-connected pin, located between one of the pair of ground pins and one of the pair of differential pins adjacent thereto, and not located between the pair of differential pins.
17. The pin arrangement as claimed in claim 16 , wherein the at least one not-connected pin is a floating pin.
18. The pin arrangement as claimed in claim 16 , wherein the pair of differential pins is adopt to USB, SATA, HDMI, PCIE or DP.