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CAT5120_07 Datasheet(Folha de dados) 1 Page - Catalyst Semiconductor

Nome de Peças. CAT5120_07
descrição  16-Tap MiniPot TM Digitally Programmable Potentiometers with 2-Wire Interface
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Fbricantes  CATALYST [Catalyst Semiconductor]
Página de início  http://www.catalyst-semiconductor.com
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© 2007 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
Doc. No. 22, Rev. C
CAT5120, CAT5121, CAT5122
16-Tap MiniPot™ Digitally Programmable
Potentiometers with 2-Wire Interface
For Ordering Information details, see page 10.
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
CAT520/52/522 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 6-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.
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.
PIn COnFIGurATIOn
GND
CS
U/D
H
VDD
2
CAT5122
GND
CS
U/D

6

5
3
4
H
VDD
VDD
2
3
4
W
5
CAT5120
sC70
sOT-23
sC70
sOT-23
sC70
sOT-23
GND
CS
U/D

6
H
2
L
5
CAT5121
3
4
FunCTIOnAl DIAGrAM
PIn DesCrIPTIOns
name
Description
VDD
Power Supply
GND
Ground
U/D
Up/Down Control Input. With CS low, a low-
to-high transition increments or decrements
the wiper position.
CS
Chip Select Input.Ahigh-to-low CS transition
determines the mode: increment if U/D is
high, or decrement if U/D is low.
L
Low Terminal of Resistor
W
Wiper Terminal of Resistor
H
High Terminal of Resistor
U/D
VDD
GND
H
L
W
CS
APPlICATIOns
lCD screen adjustment
Volume control
Mechanical potentiometer replacement
Gain adjustment
line impedance matching




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