One-Time Programmable, Linear-Taper Digital

Potentiometers

8

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PV One-Time Programming

The MAX5527/MAX5528/MAX5529 power up and func-

tion after power-up with the wiper position set in one of

three ways:

1) Factory default power-up position, midscale, adjustable

wiper

2) A newly programmed power-up position, adjustable

wiper

3) A new programmed power-up position, locked wiper

The wiper is set to the factory default position at power-

up (midscale, tap 31). Connect PV to GND or leave

floating to continue powering up the wiper position at

midscale. See Table 1 for the default and one-time pro-

gramming options.

U/D

CS

Figure 2. Increment-Mode Timing Diagram

U/D

CS

Figure 3. Decrement-Mode Timing Diagram

U/D

CS

WIPER REMAINS THE

SAME WITH U/D

HIGH AND CS RISING

WIPER CHANGES

WITH U/D LOW AND

CS RISING

Figure 4.

CS Low-to-High Transition Timing Diagram