R3130N/R3131N

16

OPERATION

OUT

Pch

Ra

Rb

Nch

GND

Comparator

Vref

-

+

Delay

Circuit

OUT pin is connected to the drain of

Nch Tr. and Pch Tr. in this IC.

OUT pin is connected to the drain of

Nch Tr. in this IC. (OUT pin should be

level.)

Block Diagram

Minimum Operating

Tdelay

GND

GND

B

A

1

2

3

4

5

Supply

Voltage

Output

Voltage

(OUT)

=Released Voltage

Operating Diagram

In the above diagram,

1

Output voltage becomes equal to supply voltage (Nch open drain output Type; equal to pull-up Voltage).

2

Output of the comparator is reversed, thus output voltage becomes equal to GND level.

3

When supply voltage is lower than minimum operating voltage, output of transistor is indefinite, therefore

output is also indefinite.

4

Output voltage is equal to GND level.

5

of the comparator is reversed, thus output voltage becomes equal to supply voltage (Nch open drain output

type; equal to pull-up voltage).

∗ There is no hysteresis range between detector threshold and released voltage.