标签: footprint

This time I would like to share a few recently-drawn Altium libraries. They are (1) Micro SD Card Slot (SMT) (2) MiniUSB Socket (SMT) (3) FPC 20-pin, 1mm pitch Socket (SMT)   Important note: The schematic symbols or footprints of (1), (2) and (3) may vary due to different manufacturers and different batches. Double check the suitability before use.   (1) Micro SD Card Slot The footprint was created for a surface-mount micro SD Card slot from Taobao. This slot is one with spring inside. When the micro SD card is inside the slot, press it again will release the card. (自彈) Fig. The micro SD card slot from Taobao   Since SD cards can be accessed through SPI or SDIO protocols, the symbol was created with marked to the pin names. Fig. The schematic symbol   There is a pin, this pin will be shorted to the casing when the card is inserted. So an external pull-up resistor and connecting the casing with Ground(VSS) are suggested to detect the card by I/O input with MCU.   Fig. Footprint for the micro SD slot   (2) MiniUSB Socket This is a simple mini USB socket Fig. The mini USB Socket   Fig. Mini USB symbol   Fig. mini USB Socket footprint   (3) FPC 20-pin side-mount socket FPC Cable is widely used to connect PCBs on movable mechanical parts, like scanner and printers. Fig. A scanner using FPC cable to link the scan sensor (Source: www.truetex.com)   Fig. The 20-pin, 1mm pitch FPC sockets (side mount)   Fig. 20-pin, 1mm pitch FPC Cable Fig. The FPC 20-pin symbol   Fig. The FPC 20-pin, 1mm pitch side-mount socket   Although the above symbols and footprints are not complicated to draw, I would like to share them here because I think sometimes it is quite time-consuming to draw the footprint of a new component, especially without the CAD dimension drawings on hand. In that case, we have to measure the dimensions first and then draw the footprint carefully. But if there is libraries of similar parts, simple modifications on the existing libraries (like modifying the number of pins in the above FPC socket) would fit the new component - need to draw from zero. So it could be very helpful to others if we draw the libraries and then share them to others :)

NXP发布了一个很好的表贴元件封装的文档，大家可以看看，还不错。