CAT5269

www.DataSheet4U.com CAT5269 Dual Digitally Programmable Potentiometers (DPP™) with 256 Taps and 2-wire Interface FEATURES „ Four linear taper digitally programmable potentiometers „ 256 resistor taps per potentiometer „ End to end resistance 50kΩ or 100kΩ „ Potentiometer control and memory access via 2-wire interface (I2C like) „ Low wiper resistance, typically 100Ω „ 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 „ 24-lead SOIC and TSSOP packages „ Industrial temperature range For Ordering Information details, see page 15. DESCRIPTION The CAT5259 is two digitally programmable poten– tiometers (DPPs™) integrated with control logic and 18 bytes of NVRAM memory. Each DPP consists of a series of 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 8-bit control register (WCR) independently controls the wiper tap switches for each DPP. Associated with each wiper control register are four 8-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 2-wire serial bus. On power-up, the contents of the first...