TG16C554: Quad Channel Uart for Data Communication

General Description | Technical Data Sheet | Ordering Information

The TG16C554 is a quad-channel high performance Universal Asynchronous Receiver/Transmitter (UART) offering data rates up to 1.5Mbps. Each uart on the TG16C554 is a quad functionally compatible with the industry standard 16C550 as well as an upgrade of the industry standard 16C450 with an additional 16-byte transmit and receive FIFO on each uart. On power-up, the TG16C554 is equivalent to the 16C454. The TG16C554 can invoke the FIFO mode of operation via setting its internal register bit for each uart. The addition of the 16-Byte transmit and receive FIFOs act as a buffer to relieve the CPU or controller of additional software overhead and improve efficiency. Additionally, there are two new pins on the TG16C554 versus the 16C454. The addition of these pins, TXRDY- and RXRDY-, allows communication with a DMA controller.

The TG16C552 uarts implement serial-to-parallel conversions on data received from a peripheral device or modem and parallel-to-serial conversion on data received from the CPU or controller. Internal registers allow for Error Indications, Operation Status, and complete Modem Controls, which can be used to monitor transmit and receive activity. Independent control of the transmit, receive, line status, and data set interrupts, allows the uart to operate under many different processor interrupt systems. The flexibility of the on-board Programmable Baud Rate Generator, allows for selection of transmit and receive clock rates from 50bps to 1.5Mbps. For ease of trouble shooting and fault isolation, the internal Loop-Back capability aids in diagnostic testing in conjunction with Break, Parity, Over-run, and Framing Error simulation register data. The TG16C554 is ideally suited for PC, embedded systems, PCI, and Networking applications, such as high-speed COM ports or internal modems. It is fabricated in an advanced 0.5m CMOS process to achieve low power drain and high-speed performance.

For space savings on the printed circuit board, the TG16C554 has two versions in a small 64-Lead LQFP package measuring 10x10x1.4 mm. The TG16C554DCQ operates in the continuous interrupt enable mode having IRQSEL internally bonded to VCC, whereas the TG16C554CQ operates under MCR bit-3 control having IRQSEL internally bonded to GND. Both versions of the 64-Lead LQFP do not have the TXRDY and RXRDY outputs available.

The TG16C554 is also available in a 68-pin PLCC package.

Technical Data Sheet

Click here to view a complete data sheet on the TG16C554 Version 1.5 (108KB pdf format), or right click to download the file to your computer.

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Ordering Information

* The commercial temperature product will operate over, but is not 100% tested, over the Industrial range. If 100% testing is required for the Industrial temperature range, order the "I" suffix product.