The following equation is provided to help estimate the

value of the resistors based on the amount of acceptable

error:

absolute resistive divider error attributable to the input

worst-case IN_ leakage current (see the

Electrical

Characteristics). Calculate R2 as follows:

Unused Inputs

OUT_ Output

The MAX16041/MAX16042/MAX16043 feature open-drain

outputs. An OUT_ goes low when its respective IN_ input

voltage drops below its specified threshold or when its

EN_ goes low (see Table 1). OUT_ goes high when EN_

Open-drain outputs require an external pullup resistor to

any voltage from 0 to 28V.

RESET Output

RESET asserts low when any of the monitored voltages

(IN_) falls below its respective threshold, any EN_ goes

low, or

MR is asserted. RESET remains asserted for the

reset timeout period after all of the monitored voltages

exceed their respective thresholds, all EN_ are high, all

OUT_ are high, and

MR is deasserted. All devices have

a push-pull, active-low reset output.

R

VR

VV

TH

INTH

TH

2

1

=

×

−

R

eV

I

A

INTH

L

1

=

×

Dual-/Triple-/Quad-Voltage, Capacitor-

Adjustable, Sequencing/Supervisory Circuits

10

______________________________________________________________________________________

IN_

R1 = R2 x

(

)

R1

R2

MAX16041

MAX16042

MAX16043

-1

Figure 3. Setting the Adjustable Input

EN_

IN_

OUT_

Low

Low

High

Low

Low

Low

High

OUT_ = high impedance

*

TH1/TH0

LOGIC

IN1 (ALL

VERSIONS)

(V)

IN2 (ALL

VERSIONS)

(V)

IN3

(MAX16042)

(V)

IN4

(MAX16043)

(V)

Low/Low

3.3

2.5

1.8

1.5

Low/High

3.3

1.8

Adj

Adj

Low/Open

3.3

1.5

Adj

Adj

High/Low

3.3

1.2

1.8

2.5

High/High

2.5

1.8

Adj

Adj

High/Open

3.3

Adj

2.5

Adj

Open/Low

3.3

Adj

Adj

Adj

Open/High

2.5

Adj

Adj

Adj

Open/Open

Adj

Adj

Adj

Adj