R3115Z161A datasheet(9/28 Pages) RICOH

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R3115Z161A Datasheet(PDF) 9 Page - RICOH electronics devices division

Part #	R3115Z161A

Description	LOW VOLTAGE DETECTOR WITH OUTPUT DELAY

Download	28 Pages

Scroll/Zoom	100%

Manufacturer	RICOH [RICOH electronics devices division]

Direct Link	http://www.ricoh.com

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9 / 28 page

R3115Z

• Operation of Output Delay

Released Voltage

+VDET

Capacitor Voltage

Supply Voltage

Output Voltage

CD Pin Threshold Voltage (VTCD)

GND

Output Delay Time(tD)

When the supply voltage which is higher than released voltage is forced to VDD pin, charge to an external

capacitor starts, then capacitor voltage increases. Until the capacitor voltage reaches to CD Pin threshold voltage,

output voltage maintains “L”. When the capacitor voltage becomes higher than CD pin threshold voltage, output

voltage is reversed from "L” to "H". Where, the time interval between the rising edge of supply voltage and output

voltage reverse point means output delay time.

• Output Delay Time

Output Delay Time (tD) can be calculated with the next formula.

=0.69×RD×CD(s)

RD is internal resistor and set at 6.5M

Ω(Typ.) typically. CD(F) describes the capacitance value of an external

capacitor. Therefore,

=0.69×6.5×106×CD(s)

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