Ultra-Small, Adjustable

Sequencing/Supervisory Circuits

10

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Enable Input (ENABLE or

ENABLE)

The MAX6895/MAX6897 offer an active-high enable

input (ENABLE), while the MAX6896/MAX6898/MAX6899

(OUT low) after the adjustable delay time (A versions). For

ed, the output asserts after typically 150ns.

The enable input has logic-high and logic-low voltage

thresholds of 1.4V and 0.4V, respectively. For both ver-

high) to force OUT low (OUT high) within 150ns typ.

Output (OUT or

OUT)

The MAX6895/MAX6899 offer an active-high, push-pull

output (OUT), and the MAX6896 offers an active-low

push-pull output (OUT). The MAX6897 offers an active-

high open-drain output (OUT), and the MAX6898 offers

an active-low open-drain output (OUT).

drain outputs can be pulled up to 28V.

Applications Information

Input Threshold

The MAX6895–MAX6899 monitor the voltage on IN with

an external resistive divider (see R1 and R2 in the

Typical Operating Circuit). Connect R1 and R2 as close

to IN as possible. R1 and R2 can have very high values

to minimize current consumption due to low IN leakage

currents (±15nA max). Set R2 to some conveniently

high value (1MΩ, for example) and calculate R1 based

on the desired monitored voltage using the following

formula:

RR

V

V

MONITOR

IN

12

1

=×

⎡

⎣

⎢

⎤

⎦

⎥

−

Figure 7. MAX6899P Timing Diagram

IN

ENABLE

OUT