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Xicor

X9252 Datasheet Preview

X9252 Datasheet

Quad Digitally-Controlled (XDCP) potentiometer

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New Feature
Dual Interface
Low Power + Quad 256-tap +
2-Wire bus + Up/Down interface
Quad Digitally-Controlled (XDCPTM) Potentiometer
X9252
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: 40typical
• Non-volatile storage of wiper positions
• Power On Recall. Loads saved wiper position on
Power-Up.
• Standby current < 20µA Max
• Maximum wiper current: 3mA
• VCC: 2.7V to 5.5V operation
• 2.8k,10k, 50k, 100kversion of total pot
resistance
• Endurance: 100, 000 data changes per bit per
register
• 100 yr. data retention
• 24-Lead TSSOP
DESCRIPTION
The X9252 integrates 4 digitally controlled potentio-
meters (XDCP) on a monolithic CMOS integrated
circuit.
The digitally controlled potentiometers are imple-
mented using 255 resistive elements in a series array.
Between each pair of elements are tap points con-
nected to wiper terminals through switches. The posi-
tion 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 writ-
ten to and read by the user. The contents of the WCR
controls the position of the wiper on the resistor array
though 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 potentio-
meter 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.
FUNCTIONAL DIAGRAM
A2
A1
A0
SDA
SCL
DS0
DS1
CS
U/D
VCC
2-Wire
Interface
Up-Down
Interface
POWER UP,
INTERFACE
CONTROL
AND
STATUS
VSS
RH0
RH1
RH2
RH3
WCR0
DR00
DR01
DR02
DR03
DCP0
WCR1
DR10
DR11
DR12
DR13
DCP1
WCR2
DR20
DR21
DR22
DR23
DCP2
WCR3
DR30
DR31
DR32
DR33
DCP3
WP
RW0 RL0
RW1 RL1
RW2 RL2
RW3 RL3
REV 1.4.1 7/29/03
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Xicor

X9252 Datasheet Preview

X9252 Datasheet

Quad Digitally-Controlled (XDCP) potentiometer

No Preview Available !

PIN CONFIGURATION
ORDERING INFO
Ordering Number
X9252YV24-2.7
X9252YV24I-2.7
X9252WV24-2.7
X9252WV24I-2.7
X9252UV24-2.7
X9252UV24I-2.7
X9252TV24-2.7
X9252TV24I-2.7
X9252
DS0
A0
RW3
RH3
RL3
U/D
VCC
RL0
RH0
RW0
A2
WP
TSSOP
1 24
2 23
3 22
4 21
5 20
6
19
X9252
7 18
8 17
9 16
10 15
11 14
12 13
DS1
SCL
RL2
RH2
RW2
CS
VSS
RW1
RH1
RL1
A1
SDA
RTOTAL
2.8k
2.8k
10k
10k
50k
50k
100k
100k
Package
24-lead TSSOP
24-lead TSSOP
24-lead TSSOP
24-lead TSSOP
24-lead TSSOP
24-lead TSSOP
24-lead TSSOP
24-lead TSSOP
Operating Temperature Range
0°C to 70°C
-40°C to +85°C
0°C to 70°C
-40°C to +85°C
0°C to 70°C
-40°C to +85°C
0°C to 70°C
-40°C to +85°C
REV 1.4.1 7/29/03
www.xicor.com
2 of 21


Part Number X9252
Description Quad Digitally-Controlled (XDCP) potentiometer
Maker Xicor
Total Page 21 Pages
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