All inputs are equipped with protection circuits against static discharge and transient excess voltage. NC = No Intern.

The M54/74HC190/191 are high speed CMOS 4-BIT SYNCHRONOUS UP/DOWN COUNTERS fabricated in silicon gate C2MOS technology. They have the same high speed performance of LSTTL combined with true CMOS low power consumption. State changes of the counter are.

Since 2006. D4U Semicon.   |   Contact Us   |   Privacy Policy   |   Purchase of parts