The ST16C554, ST16C554D and ST68C554 are each quad Universal Asynchronous Receivers and Transmitters (UARTs) with 16 bytes of transmit and receive FIFOs, selectable receive FIFO trigger levels, and data rates of up to 1.5Mbps.
Key Features
Pin-to-pin compatible with the industry standard
ST16C454, ST68C454, ST68C554, TI’s TL16C554A and Philips’ SC16C554B.
Intel or Motorola data bus interface select.
Four independent UART channels
Register set compatible to 16C550 Data rates of up to 1.5Mbps at 5V Data rates of up to 500kbps at 3.3V 16 byte transmit FIFO 16 byte receive FIFO with error tags 4 selectable RX FIFO trigger levels Full modem interface.
Full PDF Text Transcription for ST68C554 (Reference)
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ST68C554. For precise diagrams, and layout, please refer to the original PDF.
ST16C554 / ST16C554D / ST68C554 Data Sheet 2.97V to 5.5V Quad UARTs with 16-Byte FIFO General Description The ST16C554, ST16C554D and ST68C554 are each quad Universal Asy...
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ption The ST16C554, ST16C554D and ST68C554 are each quad Universal Asynchronous Receivers and Transmitters (UARTs) with 16 bytes of transmit and receive FIFOs, selectable receive FIFO trigger levels, and data rates of up to 1.5Mbps. Each UART has a set of registers that provide the user with operating status and control, receiver error indications, and modem serial interface controls. An internal loopback capability allows onboard diagnostics. The ST16C554 is available in a 64-pin LQFP package, the ST16C554D is available in both a 64-pin LQFP and a 68-pin PLCC package, and the ST68C554 is available in a 68-pin PLCC package