The pentometer is stored from Volatile.The digital analogic can be secured by using the Tape and Reel package.There are 256 positions in pentometer.The digi devices has 10 pins.
AD5290YRM10-R7 Features
AD5290YRM10-R7 Applications
There are a lot of Analog Devices AD5290YRM10-R7 Digital Potentiometers applications.