ST16C1550 Series 1.5 Mbps 5.5 V Surface Mount UART With 16-Byte FIFO - PLCC-28
ST16C1551 Series Single Channel 1.5 Mbps 5.5 V UART with 16 Byte FIFO - PLCC-28
IC Uart 2.97V - 5.5V 28PLCC