S80830 datasheet(34/54 Pages) SII

34 / 54 page

ULTRA-SMALL PACKAGE HIGH-PRECISION VOLTAGE DETECTOR

S-808xxC Series

Rev.3.2_00

Seiko Instruments Inc.

3. Change of Detection Voltage

In Nch open-drain output products of the S-808xxC series, detection voltage can be changed using

resistance dividers or diodes as shown in Figures 30 to 31. In Figure 30, hysteresis width also changes.

(Nch open-drain

output products)

OUT

VIN

VSS

VDD

−

S-

808xxCN

(RA

≤75 kΩ)

DET

voltagae

Detection

−

•

HYS

width

Hysterisis

•

(Nch open-drain

output product)

Vf1

OUT

VIN

VSS

VDD

S-

808xxCN

Vf2

Detection voltage=Vf1+Vf2+(

−VDET)

*1.

RA should be 75 k

Ω or less to prevent oscillation.

Caution If RA and RB are large, the hysteresis

width may aloso be larger than the value

given by the above equation due to the

through-type current (which flows

slightly in an Nch open-drain product).

Figure 30

Figure 31

Caution The above connection diagram and constants do not guarantee correct operation. Perform

sufficient evaluation using the actual application to set the constants.

S80830 Datasheet(PDF) 34 Page - Seiko Instruments Inc

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