QHY Level Convertor Board Kit (for Scientific Cameras)

Some QHYCCD Camera has the 4pin, 5pin, or 6pin high-speed GPIO socket which can supply the shuttermeassure signal and many other signals. Because the signal is output/input direction from/to the main FPGA of the camera. It has the high-speed feature, to compare with the two SMA port which using the Opto-coupler.

But the socket is the 1.8V/2.5V TTL level. It may not compatible with the user’s circuit. And also the pin is connected directly with FPGA, although there is the EMI protect diode on the PCB board to protect the FPGA pin. But it still has the risk that connects directly with the user circuit. The over-voltage / shortcut / high EMI voltage will cause the FPGA IO port to get damaged and it needs to replace the mainboard, which is a lot of costs.

In order to get this port more friendly to be using and reduce the damage risk. QHYCCD designed a level convert board. The major part of this board is four CMOS gates. The gate’s direction can be controlled by the DIP switch. It can be configured as output direction or input direction, to match the different modes of the four IO pins.

Different IO voltage can be applied to this gate. So on the user side, it can be configured to different VCC voltage. The range is from +1.8V to +5V. The output signal in the user socket will be the voltage of the VCC

Further details can be found on the webpage of QHYCCD