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参数资料
| 型号： | R5109N271A-TR-FE |
| 厂商： | RICOH COMPANY LTD |
| 元件分类： | 电源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO8 |
| 封装： | HALOGEN FREE AND ROHS COMPLIANT, SSOP-8 |
| 文件页数： | 18/40页 |
| 文件大小： | 517K |
| 代理商： | R5109N271A-TR-FE |
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R510xx
25
Power on Reset Operation against the input glitch (tPLH1 < tPLH)
VDD
VCD
VRESETB
Complete
Discharge
+VDET
-VDET
+VTCD
-VTCD
tPLH1
0V
tPLH
Incomplete
Discharge
Minimum Operating Voltage
We specified the minimum operating voltage as the minimum input voltage in which the condition of RESETB
pin being 0.1V or lower than 0.1V. (Herein, pull-up resistance is set as 100k
Ω in the case of the Nch open-drain
output type.)
Inhibit (INH) Function
If INH pin is set at "L", the watchdog timer stops monitoring the clock, and the RESETB output will be
dominant by the voltage detector's operation. Therefore, if the SENSE pin voltage is set at more than the
detector threshold level, RESETB outputs "H" regardless the clock pulse. INH pin is pulled up with a resistor
(Typ.110k
Ω) internally.
SENSE Function
Built-in Voltage detector monitors the input voltage for SENSE pin. To obtain the normal detector threshold,
VDD
≥ 1.5V must be secured.
RESETB Output
RESETB pin's output type is selectable either the Nch open-drain output or CMOS output. If the Nch
open-drain type output is selected, the RESETB pin is pulled up with an external resistor to an appropriate
voltage source.
Clock Pulse Input
Built-in watchdog timer is cleared with the SCK clock pulse within the watchdog timeout period.
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