X9252 Datasheet, PDF (1/19 Pages) Xicor Inc. – Quad Digitally-Controlled (XDCP) potentiometer

X9252
®
Low Power + Quad 256-tap + 2-Wire Bus + Up/Down Interface
Data Sheet
September 14, 2005
FN8167.1
Quad Digitally-Controlled (XDCP™)
Potentiometer
The X9252 integrates 4 digitally controlled potentiometers
(XDCP) on a monolithic CMOS integrated circuit.
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.
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.
Features
• Quad Solid State Potentiometer
• 256 Wiper Tap Points-0.4% Resolution
• 2-Wire Serial Interface for Write, Read, and Transfer
Operations of the Potentiometer
• 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_CC: 2.7V to 5.5V Operation
• 2.8kΩ,10kΩ, 50kΩ, 100kΩ Version of Total Pot Resistance
• Endurance: 100, 000 Data Changes per Bit per Register
• 100 yr. Data Retention
• 24 Ld TSSOP
• Pb-Free Plus Anneal Available (RoHS Compliant)
Pinout
X9252
(24 LD TSSOP)
TOP VIEW
DS0
A0
R_W3
R_H3
R_L3
U/D
V_CC
R_L0
R_H0
R_W0
A2
WP
1
24
2
23
3
22
4
21
5
20
6 _X9252 ¹⁹
7
18
8
17
9
16
10
15
11
14
12
13
DS1
SCL
R_L2
R_H2
R_W2
CS
V_SS
R_W1
R_H1
R_L1
A1
SDA
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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XDCP is a trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2005. All Rights Reserved
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