DS4301 Datasheet, PDF (1/7 Pages) Dallas Semiconductor – Nonvolatile, 32-Position Digital Potentiometer

Rev 0; 8/03
Nonvolatile, 32-Position Digital Potentiometer
General Description
The DS4301 is a single 32-position linear digital poten-
tiometer with 200kΩ end-to-end resistance. The wiper
setting is stored in EEPROM, so the DS4301 powers up
with the last stored setting. The position of the wiper is
controlled through a simple three-terminal
increment/decrement interface. The DS4301 is ideal for
white LED backlight brightness control. Its 8-pin µSOP
package, 2.4V to 5.5V supply range, and 200kΩ end-
to-end resistance are especially suited for portable,
battery-powered applications such as cellular tele-
phones and PDAs.
Applications
White LED Backlight Brightness Control
Portable Battery-Powered Devices such as PDAs
and Cellular Phones
Any Application that Requires a Small, Low-Cost
NV Potentiometer
Features
♦ Single, 32-Position, 200kΩ Linear Nonvolatile (NV)
Potentiometer Ideal for Battery-Powered
Applications
♦ Three-Terminal Increment/Decrement Interface to
Adjust Wiper Position
♦ Wide Voltage Supply Range (2.4V to 5.5V)
♦ Command-Initiated NV Wiper Storage
♦ Operates Over the Industrial Temperature Range
(-40°C to +85°C)
♦ Available in 8-Pin µSOP
Ordering Information
PART
DS4301U-200
TEMP RANGE
-40°C to +85°C
PIN-PACKAGE
8 µSOP (118 mil)
TOP VIEW
Pin Configuration
INC 1
U/D 2
H3
GND 4
DS4301
µSOP
8 V_CC
7 CS
6L
5W
Typical Operating Circuit
V_CC
V_CC
V_REF ^VCC
10µH
V_CC
H 1µF
10µF
0.1µF
CONTROL
INTERFACE
DS4301 _W
CS
INC
L
U/D
GND
V_CC
EXT
ADJ
WHITE LED
CURRENT
CS
REGULATOR _FB
GND PGND
MBR0540
1µF
WHITE
LEDs
R_FB
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