LS          ALS       HC/HCT  AC/ACT
Voltage, V        4.75...5.25 4.5...5.5 2.0  ...  6.0
Temperature, C    0 ... +70   -40       ...       +85
Gate current, mka 400         200       0.5
D-trig. freq, Mhz 33          60        55        160