CAT5121: Digital Potentiometer (POT), 16-Tap, with 2-Wire Interface

CAT5121 linear-taper digital POT performs the same function as a mechanical potentiometer or a variable resistor. This device consists of a fixed resistor and a wiper contact with 32-tap points that are digitally controlled through a 2-wire up/down serial interface.The CAT5121 is configured as a variable resistor. See Pin Configurations for part functionality. Three resistance values are available: 10 kΩ , 50 kΩ and 100 kΩ.

Features
  • 0.3 µA Ultra-low supply current
  • Single-supply operation: 2.7 V to 5.5 V
  • Glitchless switching between resistor taps
  • Power-on reset to midscale
  • 2-Wire up/down serial interface
  • Resistance values: 10 kΩ, 50 kΩ and 100 kΩ
Applications
  • LCD screen adjustment
  • Volume control
  • Mechanical potentiometer replacement
  • Gain adjustment
  • Line impedance matching
End Products
  • Industrial Equipment
Data Sheets (1)
Document TitleDocument ID/SizeRevisionRevision Date
Digital Potentiometer (POT), 16-Tap, with 2-Wire InterfaceCAT5121/D (197.0kB)8
Package Drawings (2)
Document TitleDocument ID/SizeRevision
SC-88 (SC-70 6 Lead), 1.25x2419AD (59.9kB)A
SOT-23, 6 Lead, 1.6x2.9527AJ (59.3kB)B
Order Information
ProductStatusCompliancePackageMSL*ContainerBudgetary Price/Unit
CAT5121SDI-10GT3ActivePb-free Halide freeSC-88-6 / SC-70-6419AD1Tape and Reel3000$1.16
CAT5121SDI-50GT3ActivePb-free Halide freeSC-88-6 / SC-70-6419AD1Tape and Reel3000$1.16
CAT5121TBI-10GT3ActivePb-free Halide freeSOT-23-6527AJ1Tape and Reel3000$1.1466
CAT5121TBI-50GT3ActivePb-free Halide freeSOT-23-6527AJ1Tape and Reel3000$1.1466
Specifications
Product# of Pots# of TapsTypeControl InterfaceResistance Typ (kΩ)VH Max (V)Wiper Position MemoryVDD Max (V)
CAT5121SDI-10GT3116RheostatUp/Down10VCCNo5.5
CAT5121SDI-50GT3116RheostatUp/Down50VCCNo5.5
CAT5121TBI-10GT3116RheostatUp/Down10VCCNo5.5
CAT5121TBI-50GT3116RheostatUp/Down50VCCNo5.5
Digital Potentiometer (POT), 16-Tap, with 2-Wire Interface (197.0kB) CAT5121
SC-88 (SC-70 6 Lead), 1.25x2 CM1213A
SOT-23, 6 Lead, 1.6x2.9 CM1231-02SO