X93254 Datasheet, PDF (1/10 Pages) Intersil Corporation – Dual Digitally Controlled Potentiometers

®
Data Sheet
March 1, 2005
X93254
FN8186.0
Dual Digitally Controlled Potentiometers
(XDCPs™)
FEATURES
• Dual solid-state potentiometers
• Independent Up/Down interfaces
• 32 wiper tap points per potentiometer
—Wiper position stored in nonvolatile memory
and recalled on power-up
• 31 resistive elements per potentiometer
—Temperature compensated
—Maximum resistance tolerance of ± 30%
—Terminal voltage, 0 to V_CC
• Low power CMOS
—V_CC = 3V±10%
—Active current, 250µA max
—Standby current, 1µA max
• High reliability
—Endurance 200,000 data changes per bit
—Register data retention, 100 years
• R_TOTAL value = 50kΩ
• 14-lead TSSOP package
DESCRIPTION
The Intersil X93254 is a dual digitally controlled poten-
tiometer (XDCP). The device consists of two resistor
arrays, wiper switches, a control section, and nonvola-
tile memory. The wiper positions are controlled by indi-
vidual Up/Down interfaces.
A potentiometer is implemented by a resistor array
composed of 31 resistive elements and a wiper switch-
ing 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 non-
volatile memory and then be recalled upon a subse-
quent power-up operation.
Each potentiometer is connected as a two-terminal
variable resistor and can be used in a wide variety of
applications including:
– Bias and Gain control
– LCD Contrast Adjustment
BLOCK DIAGRAM
Up/Down
(U/D₁)
Increment
(INC₁)
Device Select
(CS₁)
Up/Down
(U/D₂)
Increment
(INC₂)
Device Select
(CS₂)
V_CC (Supply Voltage)
30K
30K
Control
and
Memory
Control
and
Memory
R_H1
R_L1
R_H2
R_L2
V_SS (Ground)
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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