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X93256 Datasheet

  • X93256

  • Dual Digitally Controlled Potentiometers

  • 9頁

  • INTERSIL   INTERSIL

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X93256
Data Sheet
March 4, 2005
FN8188.0
Dual Digitally Controlled Potentiometers
(XDCPs鈩?
FEATURES
鈥?Dual solid-state potentiometers
鈥?Individual Up/Down interfaces
鈥?32 wiper tap points per potentiometer
鈥擶iper position stored in nonvolatile memory
and recalled on power-up
鈥?31 resistive elements per potentiometer
鈥擳emperature compensated
鈥擬aximum resistance tolerance of 鹵 25%
鈥擳erminal voltage, 0 to V
CC
鈥?Low power CMOS
鈥擵
CC
= 2.7 V - 5.5 V.
鈥擜ctive current, 200碌A(chǔ) typical per potentiometer
鈥擲tandby current, 4碌A(chǔ) max per potentiometer
鈥?High reliability
鈥擡ndurance 200,000 data changes per bit
鈥擱egister data retention, 100 years
鈥?R
TOTAL
value = 12.5k
鈩?/div>
, 50k
鈩?/div>
鈥?Packages
鈥?4-lead TSSOP
BLOCK DIAGRAM
General Description
V
CC
(Supply Voltage)
R
H1
30K
DESCRIPTION
The Intersil X93256 is a dual digitally controlled
potentiometer (XDCP). The device consists of two
resistor arrays, wiper switches, a control section, and
nonvolatile memory. The wiper positions are controlled
by individual Up/Down interfaces.
A potentiometer is implemented by a resistor array
composed of 31 resistive elements and a wiper switching
network. The position of each wiper element is controlled
by a set of independent CS, U/D, and INC inputs. The
position of the wiper can be stored in nonvolatile memory
and then be recalled upon a subsequent power-up
operation.
Each potentiometer is connected as a three-terminal
variable resistor and can be used in a wide variety of
applications including:
鈥?bias and gain control
鈥?LCD Contrast Adjustment
Detailed Single Potentiometer Description
U/D
1
INC
1
CS
1
5-Bit
Up/Down
Counter
31
30
29
5-Bit
Nonvolatile
Memory
Store and
Control
Recall
Circuitry
V
CC
28
One
of
Thirty
Two
Decoder
2
1
0
R
L1
R
H1
R
W1
Up/Down
(U/D
1
& U/D
2
)
Increment
(INC
1
& INC
2
)
Device Select
(CS
1
& CS
2
)
R
L1
R
H2
R
W
Transfer
Gates
Resistor
Array
Control
and
Memory
R
W2
R
L2
V
SS
(Ground)
V
SS
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-352-6832
|
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.

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