The 73K224L is a highly integrated single-chip modem IC which provides the functions needed to construct a V.22bis compatible modem, capable of 2400 bit/s full-duplex operation over dial-up lines. The 73K224L offers excellent performance and a high level of functional integration in a single 28-pin DIP and 44-pin TQFP package. This device supports V.22bis, V.22, V.21, Bell 212A and Bell 103 modes of operation,