DESCRIPTION
   The DP7401 is four Digital Potentiometers (DPs) integrated with control logic and 16 bytes of NVRAM memory. Each DP 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. 

FEATURES
Four linear taper digital potentiometers
◾ 64 resistor taps per potentiometer
◾ End to end resistance 2.5kΩ, 10kΩ, 50kΩ or
   100kΩ
◾ Potentiometer control and memory access via
   SPI interface: Mode (0, 0) and (1, 1)
◾ Low wiper resistance, typically 80Ω
◾ 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