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參數(shù)資料
| 型號(hào)： | R5107G271A-TR |
| 廠商： | RICOH COMPANY LTD |
| 元件分類(lèi)： | 電源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO8 |
| 封裝： | 2.90 X 4 MM, 0.65 MM PITCH, SSOP-8 |
| 文件頁(yè)數(shù)： | 14/15頁(yè) |
| 文件大小： | 392K |
| 代理商： | R5107G271A-TR |
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R5107G(Preliminary)
8
OPERATION
M When the 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.
N When the SCK pulse is input, the watchdog timer is cleared, and TW pin mode changes from discharge
mode to charge mode. When the TW pin voltage becomes higher than VREFH, the mode will change into
discharge, and next watchdog time count starts.
O Unless the SCK pulse is input, WDT will not be cleared, and during the charging period of TW pin,
RESETB="L".
P When the VDD pin becomes lower than the detector threshold voltage, RESETB outputs "L".
Q If "L" signal is input to the MR pin, the RESETB outputs "L", regardless the SCK clock state and VIN voltage.
R When the signal to the MR pin is set from "L" to "H", the watchdog starts supervising the system clock.
MR
CD
RESETB
Complete
Discharge
Power on Reset operation with MR pin Input
( tpLH1 < tpLH )
+V TCD
-VTCD
tpLH
tpLH1
0V
Incomplete Discharge
tpLH
VDD
CD
RESETB
Complete Discharge
DET
+V
+VTCD
TCD
tpLH1
Power on Reset Operation against the input glitch
(tpLH1 < tpLH)
0V
Incomplete Discharge
-V DET
-V
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