CAT5409

www.DataSheet4U.com CAT5409 Quad Digitally Programmable Potentiometers (DPP™) with 64 Taps and I²C Interface FEATURES „ Four linear taper digitally programmable potentiometers „ 64 resistor taps per potentiometer „ End to end resistance 2.5kΩ, 10kΩ, 50kΩ or 100kΩ „ I²C interface „ Low wiper resistance, typically 80Ω „ Four non-volatile wiper settings for each potentiometer „ 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 „ Write protection for data register For Ordering Information details, see page 15. DESCRIPTION The CAT5409 is four Digitally Programmable Potentiometers (DPP™) integrated with control logic and 16 bytes of NVRAM memory. A separate 6-bit control register (WCR) independently controls the wiper tap position 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 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). ¯¯¯) pin protects against The Write Protection (WP inadvertent programming of the data register. The CAT5409 can be used as a potentiometer or as a two terminal, v...