ZHCSJ46F December 2016 – December 2018 DRA74P , DRA75P
ADVANCE INFORMATION for pre-production products; subject to change without notice.
To evaluate the frequency of a digital signal, an estimated rule of thumb is to consider its bandwidth fBW with respect to its rise time, tR:
fBW ≈ 0.35 / tR
This frequency actually corresponds to the break point in the signal spectrum, where the harmonics start to decay at 40 dB per decade instead of 20 dB per decade.