DESCRIPTION
The X9521 combines two Digitally Controlled Potentiometers (DCP’s), and integrated EEPROM with Block LockTM protection. All functions of the X9521 are accessed by an industry standard 2-Wire serial interface.

FEATURES
• Two Digitally Controlled Potentiometers (DCP’s)
   —100 Tap - 10kΩ
   —256 Tap - 100kΩ
   —Non-Volatile
   —Write Protect Function
• 2 kbit EEPROM Memory with Write Protect & Block
   LockTM
• 2-Wire industry standard Serial Interface
   —Complies to the Gigabit Interface Converter (GBIC)
      specification
• Single Supply Operation
   —2.7V to 5.5V
• Hot Pluggable
• Packages
   —CSP (Chip Scale Package)
   —20 Pin TSSOP