FUJITSU MHW2120BS - Manual (Page 29)

1.3 Power Requirements
(4) A negative voltage like the bottom figure isn't to occur at +5 V when power is turned off
and, a thing with no ringing.
Permissible level:
− 0.2 V
Vol
tag
e [
V
]
5
0 100 200 300 400 500 600 700 800
Time [ms]
4
3
2
1
0
-1
Figure 1.2 The example of negative voltage waveform at +5 V
when power is turned off
C141-E249 1-7