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X9319 Datasheet, PDF (1/10 Pages) Xicor Inc. – Digitally Controlled Potentiometer (XDCP)
Digitally Controlled Potentiometer (XDCP™)
X9319
FEATURES
• Solid-state potentiometer
• 3-wire serial interface
• Terminal voltage, 0 to +10V
• 100 wiper tap points
—Wiper position stored in nonvolatile memory
and recalled on power-up
• 99 resistive elements
—Temperature compensated
—End to end resistance range ± 20%
• Low power CMOS
—VCC = 5V
—Active current, 3mA max.
—Standby current, 1mA max.
• High reliability
—Endurance, 100,000 data changes per bit
—Register data retention, 100 years
• RTOTAL value = 10KΩ and 50KΩ
• Packages
—8-lead SOIC and DIP
APPLICATIONS
• LCD bias control
• DC bias adjustment
• Gain and offset trim
• Laser diode bias control
• Voltage regulator output control
DESCRIPTION
The Xicor X9319 is a digitally controlled potentiometer
(XDCP). The device consists of a resistor array, wiper
switches, a control section, and nonvolatile memory.
The wiper position is controlled by a 3-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
potentiometer for voltage control or as a two-terminal
variable resistor for current control in a wide variety of
applications.
BLOCK DIAGRAM
VCC (Supply Voltage)
Up/Down
(U/D)
Increment
(INC)
Device Select
(CS)
Control
and
Memory
VSS (Ground)
General
XDCP is a trademark of Xicor, Inc.
REV 1.7 7/10/03
U/D
INC
CS
RH
RW
RL
VVCSSC
Up/Down
Counter
7-Bit
Nonvolatile
Memory
Store and
Recall
Control
Circuitry
99
RH
98
97
One 96
of
One
Hundred
Decoder
2
Wiper
Switches
Resistor
Array
1
0
RL
RW
Detailed
www.xicor.com
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