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CAT5122TBI-50-GT10 Datasheet(PDF) 1 Page - Catalyst Semiconductor |
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CAT5122TBI-50-GT10 Datasheet(HTML) 1 Page - Catalyst Semiconductor |
1 / 13 page © 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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