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参数资料
| 型号： | M48T212AMH |
| 厂商： | 意法半导体 |
| 英文描述： | 3.3V TIMEKEEPER CONTROLLER |
| 中文描述： | 3.3计时控制器 |
| 文件页数： | 17/20页 |
| 文件大小： | 165K |
| 代理商： | M48T212AMH |
17/20
M48T212A
Figure 13. Supply Voltage Protection
AI02169
VCC
0.1
μ
F
DEVICE
VCC
VSS
POWER SUPPLY DECOUPLING
AND UNDERSHOOT PROTECTION
Note: I
CC
transients, including those produced by
output switching, can produce voltage fluctua-
tions, resulting in spikes on the V
CC
bus. These
transients can be reduced if capacitors are used to
store energy, which stabilizes the V
CC
bus. The
energy stored in the bypass capacitors will be re-
leased as low going spikes are generated or ener-
gy will be absorbed when overshoots occur.
A ceramic bypass capacitor value of 0.1μF is rec-
ommended in order to provide the needed filtering.
In addition to transients that are caused by normal
SRAM operation, power cycling can generate neg-
ative voltage spikes on V
CC
that drive it to values
below V
SS
by as much as one volt. These negative
spikes can cause data corruption in the SRAM
while in battery backup mode.
To protect from these voltage spikes, ST recom-
mends connecting a schottky diode from V
CC
to
V
SS
(cathode connected to V
CC
, anode to V
SS
).
(Schottky diode 1N5817 is recommended for
through hole and MBRS120T3 is recommended
for surface mount).
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| M48T212Y-70MH1TR | Shielded Multiconductor Cable; Number of Conductors:4; Conductor Size AWG:24; No. Strands x Strand Size:7 x 32; Jacket Material:Polyvinylchloride (PVC); Leaded Process Compatible:Yes; Conductor Material:Copper; Temperature Max:80 C RoHS Compliant: Yes |
相关代理商/技术参数 |
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| M48T212V | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:3.3V TIMEKEEPER supervisor |
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| M48T212V-70MH1E | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:5V/3.3V TIMEKEEPER CONTROLLER Supervisor |
| M48T212V-70MH1F | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:5V/3.3V TIMEKEEPER CONTROLLER Supervisor |
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