CMOS集成电路使用注意事项（国外英文资料）.docVIP

CMOS集成电路使用注意事项（国外英文资料） The CMOS integrated circuit USES considerations Installation of CMOS integrated circuit In order to avoid the damage circuit due to electrostatic induction, the soldering iron used by the CMOS integrated circuit must be well grounded and no welding time is longer than 5 seconds. It is best to use 20 ~ 25W hot soldering iron and 502 epoxy flux, which can be used when necessary. The CMOS integrated circuit should not be installed when switching on the power supply. All contact with the CMOS integrated circuit process, using the workbench and forbidden ground floor high insulation board (such as rubber, glass, organic glass, plastic board, etc.), should put strict workbench with the grounding of fine wire mesh or wire, and regularly check grounding reliability. CMOS integrated circuit testing All the instruments and instruments of CMOS integrated circuit should be grounded properly. If it is a low resistance signal source, the input signal should not exceed the voltage range of the CMOS integrated circuit (CXXX series is 7-15v, C4000 series 3-18v), and VSS is less than or equal to VDD. If the input signal must exceed the CMOS integrated circuit power supply voltage range, should be in the input with a current limiting resistor, make the input current is less than 5 ma, in order to avoid protection diode burned inside the CMOS integrated circuit. If the signal source and CMOS integrated circuit are powered by two sets of power, the CMOS integrated circuit power supply should be connected first, then the source of the signal source will be switched on. When turning off, turn off the source of the signal and turn off the CMOS integrated circuit power. Protection of CMOS integrated circuits Because of high input impedance CMOS integrated circuit, random accumulation is likely to make the circuit voltage at the ends of the terminal any more than MOS tube grid breakdown voltage, circuit damage caused thereby. Therefore, the CMOS integrated circuit sho