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.