General Test Parameters for CMOS Devices

Test Parameter	Unit	Typical Description
Logic High Input Voltage, Vih (Logic "1")	V	This is the minimum voltage that an input of a CMOS digital IC is guaranteed to recognize as a Logic "1". Typical Spec: 3.5 V min. for Vss = 5V
Logic Low Input Voltage, Vil (Logic "0")	V	This is the maximum voltage that an input of a CMOS digital IC is guaranteed to recognize as a Logic "0". Typical Spec: 1.5 V max. for Vss = 5V
Logic High Output Voltage, Voh (Logic "1")	V	This is the minimum voltage that an output of a CMOS digital IC is guaranteed to deliver as a Logic "1". Typical Spec: 4.99 V min. for Vss = 5V
Logic Low Output Voltage, Vol (Logic "0")	V	This is the maximum voltage that an output of a CMOS digital IC is guaranteed to deliver as a Logic "0". Typical Spec: 0.01 V max. for Vss = 5V
Logic High Input Current, Iih	pA	This is the minimum amount of current needed by an input of a CMOS digital IC to stay at Logic "1". Example of an Actual Spec: +10 pA min. when Vss = 5V; Vin = 3.5V
Logic Low Input Current, Iil	pA	This is the maximum amount of current that the input of a CMOS digital IC can sink to stay at Logic "0". Example of an Actual Spec: -10 pA max. when Vss = 5V; Vin = 1.5V
Logic High Output Current, Ioh	mA	This is the maximum amount of current that an output of a CMOS digital IC can source while at Logic "1". Example of an Actual Spec: -0.5 mA max. when Vss = 5V; Vin = 3.5V
Logic Low Output Current, Iol	mA	This is the maximum amount of current that an output of a CMOS digital IC can sink while at Logic "0". Example of an Actual Spec: +0.4 mA max. when Vss = 5V; Vin = 1.5V

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