DESCRIPTION

The CAT5221 is two Digitally Programmable Potentiometers (DPPs™) integrated with control logic and 16 bytes of NVRAM memory. Each DPP 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.

FEATURES

■ Two linear-taper digitally programmable 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 1µA

■ 1,000,000 nonvolatile WRITE cycles

■ 100 year nonvolatile memory data retention

■ 20-lead SOIC and TSSOP packages

■ Industrial temperature range