Found 5 alternatives for TAS1020APFBG4 by Rochester Electronics, LLC. Interface Controllers — 48-TQFP.
IC BACKPLANE PHY 3.3V 48-TQFP
IC MINI USB STREAM CNTRLLR48TQFP
IC STEREO USB AUD INTRFCE48-TQFP
IC QUAD UART W/FIFO 3.3V 48-TQFP
IC ETH CTRLR SNGL-CHIP 48TQFP