The X9408 is a low noise, low power, 2-wire bus quad digitally controlled potentiometer with 40 ohm typical resistance, four non-volatile data registers, 2.7V to 5.5V operation, 10k ohm, 2.5k ohm end to end resistances, 100,000 data changes per bit per register, 100 years data retention, and three packages: 24 pin SOIC, TSSOP, and PDIP.