X9252
®
Low Power + Quad 256-tap + 2-Wire Bus + Up/Down Interface
Data Sheet
September 14, 2005
FN8167.1
Quad Digitally-Controlled (XDCP™)
Potentiometer
Features
• Quad Solid State Potentiometer
The X9252 integrates 4 digitally controlled potentiometers
(XDCP) on a monolithic CMOS integrated circuit.
• 256 Wiper Tap Points-0.4% Resolution
• 2-Wire Serial Interface for Write, Read, and Transfer
Operations of the Potentiometer
The digitally controlled potentiometers are implemented
using 255 resistive elements in a series array. Between each
pair of elements are tap points connected to wiper terminals
through switches. The position of each wiper on the array is
controlled by the user through the Up/Down (U/D) or 2-wire
bus interface. The wiper of each potentiometer has an
associated volatile Wiper Counter Register (WCR) and four
non-volatile Data Registers (DRs) 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. At power-up, the device recalls the contents of the
default data registers DR00, DR10, DR20, DR30, to the
corresponding WCR.
• Up/Down Interface for Individual Potentiometers
• Wiper Resistance: 40Ω Typical
• Non-Volatile Storage of Wiper Positions
• Power On Recall. Loads Saved Wiper Position on Power-
Up.
• Standby Current < 20µA Max
• Maximum Wiper Current: 3mA
• V : 2.7V to 5.5V Operation
CC
• 2.8kΩ,10kΩ, 50kΩ, 100kΩ Version of Total Pot Resistance
• Endurance: 100, 000 Data Changes per Bit per Register
• 100 yr. Data Retention
Each DCP can be used as a three-terminal potentiometer or
as a two terminal variable resistor in a wide variety of
applications including the programming of bias voltages, the
implementation of ladder networks, and three resistor
programmable networks.
• 24 Ld TSSOP
• Pb-Free Plus Anneal Available (RoHS Compliant)
Pinout
X9252
(24 LD TSSOP)
TOP VIEW
24
23
22
DS1
SCL
DS0
A0
1
2
3
4
5
6
R
R
L2
W3
21
20
19
18
17
16
R
R
H2
H3
R
R
W2
L3
CS
U/D
X9252
V
V
SS
CC
7
8
R
R
W1
L0
9
R
R
H1
H0
10
R
R
L1
W0
15
14
13
A1
11
12
A2
SDA
WP
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1
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.