S-80723AL Ver la hoja de datos (PDF) - Seiko Instruments Inc

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Fabricante

S-80723AL

HIGH-PRECISION VOLTAGE DETECTOR

Seiko Instruments Inc 

HIGH-PRECISION VOLTAGE DETECTOR

S-807 Series

5. Oscillation

In applications where a resistor is connected to the voltage detector input (Figure 11 and 12), the through-type current

generated when the output goes from low to high (release) causes a voltage drop equal to [through-type current]×[input

resistance] across the resistor. When the input voltage resultantly drops below the detection voltage -VDET, the output

voltage returns to its low level. In this state, the through-type current -- and its resultant voltage drop -- have disappeared,

and the output goes back from low to high. Again, a through-type current is generated, a voltage drop appears, and the

process repeats. Oscillation refers to this unstable condition.

• Power reset mis-implementation

• Mis-implementation with input voltage

divider

VDD

R

Di

VIN

C

S-

(CMOS output)

807XXAL

/SL

OUT

VSS

Figure 11

VDD

RA

VIN

S-

(CMOS output)

807XXAL

/SL

OUT

RB

VSS

Figure 12

Seiko Instruments Inc.

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