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CAT5122TBI-00GT3 Datasheet(PDF) 1 Page - Catalyst Semiconductor

No. de pieza CAT5122TBI-00GT3
Descripción Electrónicos  16-Tap MiniPot??Digitally Programmable Potentiometers with 2-Wire Interface
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Fabricante Electrónico  CATALYST [Catalyst Semiconductor]
Página de inicio  http://www.catalyst-semiconductor.com
Logo CATALYST - Catalyst Semiconductor

CAT5122TBI-00GT3 Datasheet(HTML) 1 Page - Catalyst Semiconductor

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CAT5120, CAT5121, CAT5122
© Catalyst Semiconductor, Inc.
1
Doc. No. MD-2121 Rev. E
Characteristics subject to change without notice
16-Tap MiniPot™ Digitally Programmable
Potentiometers with 2-Wire Interface
FEATURES
0.3µA Ultra-low standby 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 SC-70 and SOT-23 packages
APPLICATIONS
LCD screen adjustment
Volume control
Mechanical potentiometer replacement
Gain adjustment
Line impedance matching
For Ordering Information details, see page 10.
PIN CONFIGURATION
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.
Three resistance values are available: 10kΩ, 50kΩ and
100kΩ. These are available in space-saving 5-pin and
6-pin SC-70 and SOT-23 packages.
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. A high-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
GND
CS
U/D
H
2
CAT5122
GND
CS
U/D
16
15
34
H
VDD
VDD
VDD
2
34
W
5
CAT5120
SC-70
SOT-23
SC-70
SOT-23
SC-70
SOT-23
GND
CS
U/D
16 H
2
L
5
CAT5121
34


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