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| 型號(hào)： | M48T513Y-85CS1 |
| 廠(chǎng)商： | STMICROELECTRONICS |
| 元件分類(lèi)： | 時(shí)鐘/數(shù)據(jù)恢復(fù)及定時(shí)提取 |
| 英文描述： | 0 TIMER(S), REAL TIME CLOCK, PDSO32 |
| 封裝： | SNAPHAT, PLASTIC, SO-44 |
| 文件頁(yè)數(shù)： | 16/31頁(yè) |
| 文件大?。?/td> | 168K |
| 代理商： | M48T513Y-85CS1 |
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M48T513Y, M48T513V
Power Supply Decoupling and Undershoot
Protection
ICC transients, including those produced by output
switching, can produce voltage fluctuations, re-
sulting in spikes on the VCC bus. These transients
can be reduced if capacitors are used to store en-
ergy, which stabilizes the VCC bus. The energy
stored in the 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 0.1
F (see
Figure 18) is recommended in order to provide the
needed filtering. In addition to transients that are
caused by normal SRAM operation, power cycling
can generate negative voltage spikes on VCC that
drive it to values below VSS by as much as one
volt. These negative spikes can cause data cor-
ruption in the SRAM while in battery backup mode.
To protect from these voltage spikes, ST recom-
mends connecting a schottky diode from VCC to
VSS (cathode connected to VCC, anode to VSS).
(Schottky diode 1N5817 is recommended for
through hole and MBRS120T3 is recommended
for surface mount).
Figure 18. Supply Voltage Protection
AI02169
VCC
0.1
F
DEVICE
VCC
VSS
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| M48T58-70PC1 | 0 TIMER(S), REAL TIME CLOCK, PDIP28 |
| M48T58Y-70MH1E | 0 TIMER(S), REAL TIME CLOCK, PDSO28 |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M48T513Y-85PM1 | 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:3.3V-5V 4 Mbit 512Kb x8 TIMEKEEPER SRAM |
| M48T513YPM | 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:3.3V-5V 4 Mbit 512Kb x8 TIMEKEEPER SRAM |
| M48T513YSH | 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:3.3V-5V 4 Mbit 512Kb x8 TIMEKEEPER SRAM |
| M48T559 | 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:64 Kbit 8Kb x8 TIMEKEEPER SRAM with ADDRESS/DATA MULTIPLEXED |
| M48T559Y | 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:64 Kbit 8Kb x8 TIMEKEEPER SRAM with ADDRESS/DATA MULTIPLEXED |
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