I am trying to connect the O/P from TCXO (FOX Electronics FOX924B. 20 MHz, 2.5 PPM, 3.3 V supply, Output HCMOS VOL = 0.5 V and VOH = 80% of VDD) to 74HC240 buffer, which I am also running at 3.3 V.
I am not getting anything at the output of the buffer. But as per the datasheet of 74HC240 from Motorola, it is capable of running at 3.3 V. Where I am making the mistake? I will provide any further data, circuit diagram if required.