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參數(shù)資料
| 型號(hào)： | R5105N541A-TR |
| 廠商： | RICOH COMPANY LTD |
| 元件分類： | 電源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO6 |
| 封裝： | 2.80 X 2.90 MM, SOT-23, 6 PIN |
| 文件頁數(shù)： | 14/17頁 |
| 文件大?。?/td> | 899K |
| 代理商： | R5105N541A-TR |
R5105N
6
TIMING CHART
-VDET
+VDET
VRESETB
tWR
VCTW
VSCK
VDD
Vref2H
Vref2L
tPLH
tPHL
tPLH
tWDI
(1)
(2)
(4) (1)
(3)
tWD
-VTCD
+VTCD
VCD
OPERATION
(1) When the power supply, VDD pin voltage becomes more than the released voltage (+VDET), after the released
delay time (or the power on reset time tPLH), the output of RESETB becomes "H" level.
(2) When the SCK pulse is input, the watchdog timer (WDT) is cleared, and CTW pin mode changes from the
discharge mode to the charge mode. When the CTW pin voltage becomes higher than VrefH, the mode will
change into the discharge mode, and next watchdog time count starts.
(3) Unless the SCK pulse is input, WDT will not be cleared, and during the charging period of CTW pin,
RESETB="L".
(4) When the VDD pin becomes lower than the detector threshold voltage(-VDET), RESETB outputs "L".
) VTCD : Threshold voltage of CD pin when a power-on reset pulse inverting.
) Vref2H : CTW pin voltage at the end of WDT timeout period.
) Vref2L : CTW pin voltage at the begin of WDT timeout period.
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