R5112x071D datasheet(11/34 Pages) RICOH

Part #	R5112x071D

Description	Input Voltage Range (Maximum Rating) 3.5 V to 42 V (50 V)

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Manufacturer	RICOH [RICOH electronics devices division]

Direct Link	http://www.ricoh.com

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11 / 34 page

R5112S

NO.EA-406-160420

11

Delay Operation and Released Output Delay Time (tdelay)

CD Pin Threshold Voltage

(VTCD)

Released Voltage (+VDET)

GND

Detector Voltage (-VDET)

Detect Output Delay Time (tPHL)

Release Output Delay Time

(tdelay)

VOUT/

SENSE Pin

CD Pin Voltage

DOUT Pin

Released Output Delay Timing Diagram

When the operating voltage higher than the released voltage is applied to VOUT pin (R5112SxxxD) or

SENSE pin (R5112SxxxB), charge to an external capacitor starts, then CD pin voltage (VCD) increases.

DOUT pin (R5112SxxxB/D) maintains the released output until VCD reaches the threshold voltage of the

release output delay pin (VTCD). And when VCD is over VTCD, DOUT pin is inverted from “L” to “H”. That is, the

charged external capacitor starts discharging.

When the operating voltage lower than the detector threshold is applied to VOUT pin/SENSE pin, the detect

output delay time, which is the time until the output voltage is inverted from “H” to “L”, remains constant

independent of the external capacitor.

Released Output Delay Time

Released Output Delay Time (tdelay) is determined by the following formula. CD (F) represents capacitance of

the external capacitor

tdelay (s) = 0.73

× CD (F) / (1.2 × 10-6)

Use 100 pF or higher CD when allowing this device to detect VOUT/SENSE pin decreasing slower than 0.1 V/s.

Released Output Delay Time indicates the time between the instance when VOUT pin (R5112SxxxD) or SENSE

pin (R5112SxxxB) shifts from “1.5 V” to “

−VDET + 2.0 V” by the application of a pulse voltage and the instance

when the output voltage reaches 2.5 V after pulled up DOUT pin (R5112SxxxB/D) to 5.0 V with a resistor of

100 k

Ω.

-VDET

+2.0V

1.5V

VOUT/SENSE

GND

5.0V

2.5V

GND

DOUT

tdelay

tPHL

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R5112x071D Datasheet(PDF) 11 Page - RICOH electronics devices division

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