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

Adjustable, Sequencing/Supervisory Circuits

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9

Applications Information

Tolerance

The MAX16041/MAX16042/MAX16043 feature a pin-

selectable threshold tolerance. Connect TOL to GND to

select the thresholds 5% below the nominal value.

10% below the nominal voltage. Do not leave TOL uncon-

nected.

Adjustable Input

These devices offer several monitoring options with both

fixed and/or adjustable reset thresholds (see Table 2).

For the adjustable threshold inputs, the threshold voltage

shown in Figure 3 and use the following equation to cal-

culate the threshold voltage:

Choosing the proper external resistors is a balance

between accuracy and power use. The input to the volt-

age monitor is a high-impedance input with a small

100nA leakage current. This leakage current contributes

to the overall error of the threshold voltage where the out-

put is asserted. This induced error is proportional to the

value of the resistors used to set the threshold. With lower

value resistors, this error is reduced, but the amount of

power consumed in the resistors increases.

VV

R

R

INTH

TH

=× +

⎛

⎝⎜

⎞

⎠⎟

1

1

2

Figure 2. Timing Diagram (CDLY_ Open)

IN_

EN_

OUT_

RESET