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參數(shù)資料
| 型號(hào)： | M48T201V-85MH1TR |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 時(shí)鐘/數(shù)據(jù)恢復(fù)及定時(shí)提取 |
| 英文描述： | 1 TIMER(S), REAL TIME CLOCK, PDSO44 |
| 封裝： | SNAPHAT, PLASTIC, SOIC-44 |
| 文件頁數(shù)： | 19/37頁 |
| 文件大?。?/td> | 311K |
| 代理商： | M48T201V-85MH1TR |
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Clock operation
M48T201Y, M48T201V
3.13
VCC noise and negative going transients
ICC transients, including those produced by output switching, can produce voltage
fluctuations, resulting in spikes on the VCC bus. These transients can be reduced if
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 0.1 F (as shown in
Figure 12) 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, STMicroelectronics recommends
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 12.
Supply voltage protection
AI00605
VCC
0.1
μF
DEVICE
VCC
VSS
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| M48T201Y-70MH1F | 1 TIMER(S), REAL TIME CLOCK, PDSO44 |
| M48T201V-85MH1F | 1 TIMER(S), REAL TIME CLOCK, PDSO44 |
| M48T201Y-70MH1 | 1 TIMER(S), REAL TIME CLOCK, PDSO44 |
| M48T201V-85MH1E | 1 TIMER(S), REAL TIME CLOCK, PDSO44 |
| M48T201Y-70MH1E | 1 TIMER(S), REAL TIME CLOCK, PDSO44 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M48T201VMH | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:3.3V-5V TIMEKEEPER CONTROLLER |
| M48T201VSH | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:3.3V-5V TIMEKEEPER CONTROLLER |
| M48T201Y | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:3.3V-5V TIMEKEEPER CONTROLLER |
| M48T201Y_07 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5.0 or 3.3V TIMEKEEPER㈢ supervisor |
| M48T201Y_09 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5.0 or 3.3 V TIMEKEEPER? supervisor |
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