output toggles in one direction or the other. These

resistors are not required when using the MAX6338

because hysteresis is built into the device. MAX6338

hysteresis is typically 0.3%.

Undervoltage Detection Circuit

The open-drain outputs of the MAX6338 can be config-

ured to detect an undervoltage condition. Figure 2

shows a configuration where a low at a comparator out-

put indicates an undervoltage condition, which in turn

causes an LED to light.

The MAX6338 can also be used in applications such as

system supervisory monitoring, multivoltage level

Window Detection

A window detector circuit uses two auxiliary inputs in a

configuration such as the one shown in Figure 4.

External resistors R1–R4 set the two threshold voltages

width (

voltages (Figure 5).

Quad Voltage Monitor in µMAX Package

6

_______________________________________________________________________________________

IN1

GND

IN2

IN3

IN4

OUT1

0.1

µF*

OUT2

OUT3

OUT4

+5V

*OPTIONAL

MAX6338

V1

V2

V3

V4

D3

D1

D2

D4

IN1

GND

IN2

IN3

IN4

OUT1

OUT2

OUT3

OUT4

+5V

MAX6338

IN1

GND

IN2

IN3

IN4

OUT1

OUT2

OUT3

OUT4

+5V

MAX6338HUB

OUT1

INPUT

R2

R4

R1

R3

R2

R1

R4

R3

OUT1

OUT4

OUT

Figure 2. Quad Undervoltage Detector with LED Indicators

Figure 4. Window Detection

Figure 5. Output Response of Window Detector Circuit