Digitally Controlled Potentiometer
(XDCP™)
FEATURES
• Solid-state potentiometer
• 3-wire serial interface
• 100 wiper tap points
—Wiper position stored in nonvolatile memory
and recalled on power-up
• 99 resistive elements
—Temperature compensated
—End to end resistance, ±20%
—Terminal voltages, ±5V
• Low power CMOS
—V
CC
= 5V
—Active current, 3mA max.
—Standby current, 750µA max.
• High reliability
—Endurance, 100,000 data changes per bit
—Register data retention, 100 years
• X9C102 = 1kΩ
• X9C103 = 10kΩ
• X9C503 = 50kΩ
• X9C104 = 100kΩ
• Packages
—8-lead SOIC and DIP
• Pb-free plus anneal available (RoHS compliant)
BLOCK DIAGRAM
U/D
INC
CS
V
CC
(Supply Voltage)
7-Bit
Up/Down
Counter
DESCRIPTION
The X9Cxxx are Intersil digitally controlled (XDCP)
potentiometers. The device consists of a resistor
array, wiper switches, a control section, and nonvola-
tile memory. The wiper position is controlled by a
three-wire interface.
The potentiometer is implemented by a resistor array
composed of 99 resistive elements and a wiper switch-
ing network. Between each element and at either end
are tap points accessible to the wiper terminal. The
position of the wiper element is controlled by the CS,
U/D, and INC inputs. The position of the wiper can be
stored in nonvolatile memory and then be recalled
upon a subsequent power-up operation.
The device can be used as a three-terminal potentiom-
eter or as a two-terminal variable resistor in a wide
variety of applications including:
– control
– parameter adjustments
– signal processing
