®
X9241A
Low Power/2-Wire Serial Bus
Data Sheet
September 15, 2005
FN8164.1
Quad Digitally Controlled Potentiometer
(XDCP™)
The X9241A integrates four digitally controlled
potentiometers (XDCP) on a monolithic CMOS integrated
microcircuit.
The digitally controlled potentiometer is implemented using
63 resistive elements in a series array. Between each
element are tap points connected to the wiper terminal
through switches. The position of the wiper on the array is
controlled by the user through the 2-wire bus interface. Each
potentiometer has associated with it a volatile Wiper Counter
Register (WCR) and 4 nonvolatile Data Registers
(DR0:DR3) that can be directly written to and read by the
user. The contents of the WCR controls the position of the
wiper on the resistor array through the switches. Power up
recalls the contents of DR0 to the 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 potentiometers in one package
• 2-wire serial interface
• Register oriented format
- Direct read/write/transfer of wiper positions
- Store as many as four positions per
potentiometer
• Terminal Voltages: +5V, -3.0V
• Cascade resistor arrays
• Low power CMOS
• High Reliability
- Endurance–100,000 data changes per bit per register
- Register data retention–100 years
• 16-bytes of nonvolatile memory
• 3 resistor array values
- 2kΩ to 50kΩ mask programmable
- Cascadable for values of 500Ω to 200kΩ
• Resolution: 64 taps each pot
• 20 Ld plastic DIP, 20 Ld TSSOP and 20 Ld SOIC
packages
• Pb-free plus anneal available (RoHS compliant)
Block Diagram
V
CC
V
SS
R0 R1
Wiper
Counter
Register
(WCR)
V
H0
/R
H0
R0 R1
Wiper
Counter
Register
(WCR)
Register
Array
Pot 2
V
H2
/
R
H2
V
L2
/R
L2
V
W2
/R
W2
R2 R3
SCL
SDA
A0
A1
A2
A3
V
L0
/R
L0
V
W0
/R
W0
R2 R3
Interface
and
Control
Circuitry
Data
8
R0 R1
Wiper
Counter
Register
(WCR)
Register
Array
Pot 1
V
H1
/R
H1
R0 R1
Wiper
Counter
Register
(WCR)
Register
Array
Pot 3
V
H3
/R
H3
R2 R3
V
L1
/R
L1
V
W1
/R
W1
R2 R3
V
L3
/R
L3
V
W3
/R
W3
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 ]
