DESCRIPTION
   The DP7251 is four Digital Potentiometers (DPs) integrated with control logic and 16 bytes of NVRAM memory. Each DP 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. 

FEATURES
◾ Four linear-taper digital potentiometers
◾ 254 resistor taps per potentiometer
◾ End to end resistance 50kΩ or 100kΩ
◾ Potentiometer control and memory access via
   SPI interface
◾ 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
◾ SOIC 24-lead and TSSOP 24-lead
◾ Industrial temperature range