The CX20431 AFE is designed for use in full-rate and G.lite
ADSL modems. The receive path filters out unwanted echo and
boosts the wanted signal before performing an Analog-to-Digital
(A/D) conversion. The transmit path converts digital data to analog signals and performs a smoothing operation before presenting the signals to the line driver.
The CX20431 is used in several Conexant ADSL chipsets.