Datasheet

DS1831C/D/E
9 of 15
TIMING DIAGRAM—NON-MASKABLE INTERRUPT Figure 8
NON-MASKABLE INTERRUPT CIRCUIT EXAMPLE Figure 9
Example: V
SENSE1
= 11.50 volts trip point V
SENSE1
=
R2
R2R1
+
X 1.25V
Therefore: 11.50V =
k 100
k 100R1 +
X 1.25V
Resulting In: R1 = 820 kW
Repeat the same steps to solve for R3 and R4 with V
SENSE2
.
V
IN
>1.25 V
V
TP
V
TP(min)
V
TP(max)
t
IPD
NMI
V
OL
V
TP
V
TP(min)
V
TP(max)
V
OH
t
NMI
R1
DS1831C
GND
IN1
V
SENSE1
R2
IN2
R3
V
SENSE2
R4
V
CC
10 kW
PBRST
2.5V
PBRST
3.3V
NMI1
NMI2
MPBRST
W
W