ParameterComparisonValue Vcc range (V) equals not equal All 2.0 to 6.0 2.3 to 3.6 2.7 to 5.5 4.5 to 5.5 4.75 to 5.25 Input Level equals not equal All TTL LVTTL CMOS Output Level equals not equal All TTL LVTTL CMOS Output Drive (mA) equals not equal All -24/24 -12/12 -6.5/20 -6/6 -4/4 -3/24 -2.6/24 -2/20 -1/16 -1/20 -0.4/8 - /24 Output equals not equal All OC 2S 3S Clear equals not equal All Async Sync