The MM54C14 MM74C14 Hex Schmitt Trigger is a monolithic complementary MOS (CMOS) integrated circuit constructed with N- and P-channel enhancement transistors The positive and negative going threshold voltages VT a and VTb show low variation with respect to temperature (typ 0 0005V C at VCC e 10V) and hysteresis VT a b VTb t 0 2 VCC is guaranteed All inputs are protected from damage due to static discharge by diode clamps to VCC and GND