●The CAT5221 is two digital POTs integrated with control logic and 16 bytes of EEPROM memory. Each digital POT consists of a series of 63 resistive elements connected between two externally accessible end points. The tap points between each resistive element are connected to the wiper outputs with CMOS switches. A separate 6-bit control register (WCR) independently controls the wiper tap switches for each digital POT. Associated with each wiper control register are four 6-bit non-volatile memory data registers (DR) used for storing up to four wiper settings. Writing to the wiper control register or any of the non-volatile data registers is via a I²C serial bus. On power-up, the contents of the first data register (DR0) for each of the four potentiometers is automatically loaded into its respective wiper control register (WCR).The CAT5221 can be used as a potentiometer or as a two terminal, variable resistor. It is intended for circuit level or system level adjustments in a wide variety of applications.
●Features
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● Two linear-taper digital potentiometers
● 64 resistor taps per potentiometer
● End to end resistance 2.5 kΩ, 10 kΩ, 50 kΩ or 100 kΩ
● Potentiometer control and memory access via I²C interface
● Low wiper resistance, typically 80 Ω
● Nonvolatile memory storage for up to four wiper settings for each potentiometer
● Automatic recall of saved wiper settings at power up
● 2.5 to 6.0 volt operation
● Standby current less than 1.0 µA
● 1,000,000 nonvolatile WRITE cycles
● 100 year nonvolatile memory data retention
● Industrial temperature ranges
Part 3D Model
