®
X9259
Single Supply/Low Power/256-Tap/2-Wire bus
Data Sheet
September 16, 2005
FN8169.2
Quad Digitally-Controlled (XDCP™)
Potentiometers
The X9259 integrates four digitally controlled potentio-
meters (XDCP) on a monolithic CMOS integrated circuit.
The digitally controlled potentiometers are imple-mented
with a combination of resistor elements and CMOS switches.
The position of the wipers are controlled by the user through
the 2-wire bus interface. Each potentiometer has associated
with it a volatile Wiper Counter Register (WCR) and four
non-volatile Data Registers that can be directly written to and
read by the user. The content of the WCR controls the
position of the wiper. At power-up, the device recalls the
content of the default Data Registers of each DCP (DR00,
DR10, DR20, and DR30) to the corresponding WCR.
The XDCP can be used as a three-terminal potentiometer or
as a two terminal variable resistor in a wide variety of
applications including control, parameter adjustments, and
signal processing.
Features
• Four Separate Potentiometers in One Package
• 256 Resistor Taps–0.4% Resolution
• 2-Wire Serial Interface for Write, Read, and
Transfer Operations of the Potentiometer
• Wiper Resistance: 100Ω typical @ V
CC
= 5V
• 4 Non-volatile Data Registers for Each Potentiometer
• Non-volatile Storage of Multiple Wiper Positions
• Standby Current < 5µA Max
• V
CC
: 2.7V to 5.5V Operation
• 50kΩ, 100kΩ versions of Total Resistance
• Endurance: 100,000 Data Changes per Bit per Register
• 100 yr. Data Retention
• Single Supply Version of X9258
• 24 Ld SOIC, 24 Ld TSSOP
• Low Power CMOS
• Pb-Free Plus Anneal Available (RoHS Compliant)
Functional Diagram
V
CC
R
H0
R
H1
R
H2
R
H3
A3
A2
A1
A0
SDA
SCL
2-Wire
Interface
POWER UP,
INTERFACE
CONTROL
AND
STATUS
WCR0
DR00
DR01
DR02
DR03
DCP0
WCR1
DR10
DR11
DR12
DR13
DCP1
WCR2
DR20
DR21
DR22
DR23
DCP2
WCR3
DR30
DR31
DR32
DR33
DCP3
V
SS
WP
R
W0
R
L0
R
W1
R
L1
R
W2
R
L2
R
W3
R
L3
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774
|
Intersil (and design) is a registered trademark of Intersil Americas Inc.
XDCP is a trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2005. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
INTERSIL [ INTERSIL CORPORATION ]
