max5528 Maxim Integrated Products, Inc., max5528 Datasheet - Page 8

• Manufacturer Part Number: max5528
• Description: 64-tap, One-time Programmable, Linear-taper Digital Potentiometers
• Manufacturer: Maxim Integrated Products, Inc.

One-Time Programmable, Linear-Taper Digital
Potentiometers
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
2) A newly programmed power-up position, adjustable
Figure 2. Increment-Mode Timing Diagram
Figure 3. Decrement-Mode Timing Diagram
Figure 4.
8
U/D
CS
V
wiper
wiper
W
_______________________________________________________________________________________
V
U/D
U/D
V
CS
CS Low-to-High Transition Timing Diagram
V
DD
CS
V
W
DD
W
PV One-Time Programming
t
UP
t
UP
t
CU
t
CU
t
CI
t
CI
t
IW
t
IH
t
IL
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.
t
IW
HIGH AND CS RISING
WIPER REMAINS THE
t
IL
SAME WITH U/D
t
IH
t
IC
WITH U/D LOW AND
t
IC
WIPER CHANGES
CS RISING