Table of Contents Section 1 – New and Featured Products

Signal Conditioning/Calibration and Control Products
®
X93155 Digitally Controlled Potentiometer (XDCP )
Product Highlights
• Single Supply
• Low Power
• 32 Tap
• 2-terminal Potentiometer
• Non-volatile Digital Potentiometer
Key Features
• 32 wiper tap points per potentiometer
—Wiper position stored in non-volatile memory and recalled
on power-up
• 31 resistive elements per potentiometer
— Temperature compensated
— Terminal voltage, 0 to V CC
• Low power CMOS
• 8-lead MSOP
Description
The Xicor X93155 is a digitally controlled potentiometer (XDCP).
The device consists of a resistor array, wiper switches, a control
section, and non-volatile memory. The wiper position is controlled
by a 3-wire interface.
The potentiometer is implemented by a resistor array composed
of 31 resistive elements and a wiper switching network. The
position of the wiper element is controlled by the CS, U/D,
and INC inputs. The position of the wiper can be stored in
non-volatile memory and then be recalled upon a subsequent
power-up operation.
The device 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
Benefits
• Digitally Programmable
• Set and Forget Calibration
• Reliability
• Dymanic Controls
• Non-volatile storage and recall of wiper position
• Power On Recall circuits
Pin Configuration
INC 1
U/D 2
R H 3
V SS 4
MSOP
X93155
8
7
6
5
V CC
CS
R L
NC
Block Diagram
Available: 2nd Half of 2004
V CC (Supply Voltage)
30K
U/D
INC
CS
5-Bit
Up/Down
Counter
31
30
R H
Up/Down
(U/D)
Increment
(INC)
Device Select
(CS)
Control
and
Memory
R H
5-Bit
Nonvolatile
Memory
Store and
Control Recall
Circuitry
29
28
One of
Thirty
Two
Decoder
2
Transfer
Gates
Resistor
Array
R L
1
V SS
(Ground)
V CC
0
General
V SS
R L
Detailed
1–38 www.xicor.com