Found 6 alternatives for ZDU0110RFX by Zilog. Interface Controllers — 16-TSSOP (0.173", 4.40mm Width).
IC BRIDGE SPI/I2C 16TSSOP
IC UART SINGLE W/FIFO 16-TSSOP
IC CTRL I2CW/UART 16TSSOP
IC UART SINGLE W/FIFO 16-TSSOP
IC UART 16TSSOP
IC UART FIFO I2C/SPI 64B 16TSSOP