User manual

17
the operating voltage is important. The operating voltage in all ICs of
the 40xx series may be between 3 V and 15 V.
Fig. 9: The CMOS-IC 4027
2 Inverter
The CMOS-IC 4011 contains four independent NAND-gates with two
inputs each. An initial attempt shows use of the IC at a battery voltage
of 9 V and connection of LEDs. When installing, always observe correct
polarity. The plus connection is also called Vcc, the minus connection
GND. For all CMOS-ICs, observe that inputs to used are connected
either to Vcc or GND. Open inputs may lead to increased power intake
and malfunction of the circuit. Open outputs, in contrast, are permitted.