5241

CAT5241 Quad Digitally Programmable Potentiometers (DPP™) with 64 Taps and 2-wire Interface FEATURES s Four linear-taper digitally programmable H GEN FR ALO EE LE A D F R E ETM s Automatic recall of saved wiper settings at potentiometers s 64 resistor taps per potentiometer s End to end resistance 2.5kΩ, 10kΩ, 50kΩ or 100kΩ s Potentiometer control and memory access via power up s 2.5 to 6.0 volt operation s Standby current less than 1µA s 1,000,000 nonvolatile WRITE cycles s 100 year nonvolatile memory data retention s 20-lead SOIC and TSSOP packages s Industrial temperature range 2-wire interface (I C like) s Low wiper resistance, typically 80Ω s Nonvolatile memory storage for up to four wiper 2 settings for each potentiometer DESCRIPTION The CAT5241 is four 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. A separate 6-bit control register (WCR) independently controls the wiper tap switches for each DPP. 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 2-wire serial bus (I2C-like). On powerup, the contents of the first ...