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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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M48T86PC1F 데이터시트(PDF) 23 Page - STMicroelectronics |
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M48T86PC1F 데이터시트(HTML) 23 Page - STMicroelectronics |
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23 / 36 page  M48T86 Clock operations 23/36 capacitors are used to store energy 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 0.1µF (as shown in Figure 11) 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 corruption in the SRAM while in battery backup mode. To protect from these voltage spikes, it is recommended to connect 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 11. Supply voltage protection AI02169 VCC 0.1 μF DEVICE VCC VSS |
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