M48T201V-70MH1 STMICROELECTRONICS [STMicroelectronics], M48T201V-70MH1 Datasheet - Page 23

• Manufacturer Part Number: M48T201V-70MH1
• Description: 3.3V-5V TIMEKEEPER CONTROLLER
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

V
I
switching, can produce voltage fluctuations, re-
sulting in spikes on the V
can be reduced if capacitors are used to store en-
ergy which stabilizes the V
stored in the bypass capacitors will be released as
low going spikes are generated or energy will be
absorbed when overshoots occur. A ceramic by-
pass capacitor value of 0.1µF (as shown in Figure
13) is recommended in order to provide the need-
ed filtering.
In addition to transients that are caused by normal
SRAM operation, power cycling can generate neg-
ative voltage spikes on V
below V
spikes can cause data corruption in the SRAM
while in battery backup mode. To protect from
these voltage spikes, STMicroelectronics recom-
mends connecting a schottky diode from V
V
Schottky diode 1N5817 is recommended for
through hole and MBRS120T3 is recommended
for surface mount.
CC
CC
SS
transients, including those produced by output
Noise And Negative Going Transients
(cathode connected to V
SS
by as much as one volt. These negative
CC
CC
bus. These transients
CC
that drive it to values
CC
bus. The energy
, anode to V
CC
SS
to
).
Figure 13. Supply Voltage Protection
V CC
0.1 F
M48T201Y, M48T201V
V CC
V SS
DEVICE
AI00605
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