CAT5261

www.DataSheet4U.com CAT5261 Dual Digitally Programmable Potentiometers (DPP™) with 256 Taps and SPI Interface FEATURES „ Two linear-taper digitally programmable potentiometers „ 256 resistor taps per potentiometer „ End to end resistance 50kΩ or 100kΩ „ Potentiometer control and memory access via SPI interface „ Low wiper resistance, typically 100 „ 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 24-lead TSSOP „ Industrial temperature range „ Industrial temperature range For Ordering Information details, see page 14. DESCRIPTION The CAT5261 is two Digitally Programmable Potentiometers (DPPs™) integrated with control logic and 8 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 nonvolatile data registers is via a SPI serial bus. On powerup, the contents of the fi...