在esoteric G-02的specification中有一段說到他的時脈輸出是矩形波 Rectangular wave (TTL level / 75 Ω)，這裡所謂的矩形波 Rectangular wave (TTL level / 75 Ω)不知道是多少V? 因為有網站寫到TTL要符合輸出2.4V


The output voltage and current specifications are as follows:
VOL = 0.4 V
VOH = 2.4 V
IOL = 16 mA
IOH = 400 µA

也有網站提到是3.3V

Historically, transistor-transistor logic (TTL) voltage levels have been 5.0 volts, with a high being any voltage above about 3.5 volts and a low being any voltage below about 1.5 volts, with lots of variations on the high/low cutoffs from part to part. Since about 2001, however, most processors have been using low-voltage TTL (LVTTL), which has a nominal voltage of 3.3 volts (approx >2.2 volts for high and approx < 1.2 volts for low). Hence, many parts advertised as "TTL" today actually work at 3.3 volts rather than 5.0 volts.


Esoteric的時脈輸出究竟是輸出多少V?

不知有沒有網兄知道的...thanks