M48T86PC1E STMICROELECTRONICS [STMicroelectronics], M48T86PC1E Datasheet - Page 23

• Manufacturer Part Number: M48T86PC1E
• Description: 5.0 V PC real-time clock
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

capacitors are used to store energy which stabilizes the V
bypass capacitors will be released as low going spikes are generated or energy will be
absorbed when overshoots occur. A ceramic bypass capacitor value of 0.1µF (as shown in
Figure
In addition to transients that are caused by normal SRAM operation, power cycling can
generate negative voltage spikes on V
one volt. These negative spikes can cause data corruption in the SRAM while in battery
backup mode. To protect from these voltage spikes, it is recommended to connect a
schottky diode from V
1N5817 is recommended for through hole and MBRS120T3 is recommended for surface
mount.
Figure 11. Supply voltage protection
11) is recommended in order to provide the needed filtering.
CC
to V
V CC
SS
(cathode connected to V
0.1 F
CC
that drive it to values below V
V CC
V SS
DEVICE
CC
CC
, anode to V
bus. The energy stored in the
AI02169
SS
SS
by as much as
). Schottky diode
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