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CAT5121 fiches techniques PDF

Catalyst Semiconductor - (CAT5120 - CAT5122) 16-Tap MiniPot TM Digitally Programmable Potentiometers

Numéro de référence CAT5121
Description (CAT5120 - CAT5122) 16-Tap MiniPot TM Digitally Programmable Potentiometers
Fabricant Catalyst Semiconductor 
Logo Catalyst Semiconductor 





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CAT5121 fiche technique
CAT5120, CAT5121, CAT5122
16-Tap MiniPot™ Digitally Programmable
Potentiometers with 2-Wire Interface
Features
0.3µA Ultra-low supply current
Single-supply operation: 2.7V to 5.5V
Glitchless switching between resistor taps
Power-on reset to midscale
2-Wire up/down serial interface
Resistance values: 10kΩ, 50kΩ and 100kΩ
Available in SC70 and SOT-23 packages
DEscription
CAT5120/5121/5122 linear-taper digitally programmable
potentiometers perform the same function as a
mechanical potentiometer or a variable resistor. These
devices consist of a fixed resistor and a wiper contact
with 16-tap points that are digitally controlled through a
2-wire up/down serial interface.
The CAT5120 is configured as a potentiometer. The
CAT5121 and CAT5122 are configured as variable
resistors. See Pin Configurations for part functionality.
Applications
LCD screen adjustment
Volume control
Mechanical potentiometer replacement
Gain adjustment
Line impedance matching
Three resistance values are available: 10kΩ, 50kΩ and
100kΩ. These are available in space-saving 5-pin and
6-pin SC70 and SOT-23 packages.
Functional Diagram
www.DataSheet4U.com VDD
GND
H
For Ordering Information details, see page 10.
CS
W
Pin Configuration
sC70
sOT-23
sC70
sOT-23
VDD 
6H
VDD 
5H
GND 2
5W
CAT5120
U/D 3
4 CS
GND 2
CAT5122
U/D 3
4 CS
sC70
sOT-23
VDD 
6H
GND 2
5L
CAT5121
U/D 3
4 CS
U/D
L
Pin Descriptions
Name
VDD
GND
U/D
CS
L
W
H
Description
Power Supply
Ground
Up/Down Control Input. With CS low, a low-
to-high transition increments or decrements
the wiper position.
Chip Select Input.Ahigh-to-low CS transition
determines the mode: increment if U/D is
high, or decrement if U/D is low.
Low Terminal of Resistor
Wiper Terminal of Resistor
High Terminal of Resistor
© 2007 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice

Doc. No. 2121, Rev. C

PagesPages 13
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