Standard 16C • to volt operation. • 24MHz clock operation at 5V. • 16MHz clock operation at V. • 16 byte transmit FIFO. • 16 byte receive FIFO. 16C UART Interface IC are available at Mouser Electronics. Mouser offers inventory, pricing, & datasheets for 16C UART Interface IC. To obtain the most up-to-date version of this data sheet, please register at .. 16C COMPATIBLE. SERIAL. PORT 1. TXD1, nRTS1, nDTR1.

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Interfaces are listed by their speed in the roughly ascending order, so the interface at the end of each section should be the fastest. The A and newer is pin compatible with the The eatasheet incorporates a transmit FIFO, though this feature is less critical as delays in interrupt service would only result in sub-optimal transmission speeds and not actual data loss.


Not all manufacturers adopted this nomenclature, however, continuing to refer to the fixed chip as a Technical and de facto standards for wired computer buses. Dropouts occurred with The C and CF models are okay too, according to this source.

UART – Wikipedia

To overcome these shortcomings, the series UARTs incorporated a byte FIFO buffer with a programmable interrupt trigger of 1, 4, 8, or 14 bytes. This generated high rates of interrupts as transfer speeds increased. Exchange of the having only a one-byte received data buffer with aand occasionally patching or setting system software to be aware of the FIFO feature of the datasheeet chip, improved the reliability and stability of high-speed connections.

The current version since by Texas Instruments which bought National Semiconductor is called the D.

The Art of Serial Communication. Similarly numbered devices, with varying levels of compatibility with the original National Semiconductor part, are made by other manufacturers.

16550 UART

More critically, with only a 1-byte buffer there is a genuine risk that a received byte will be overwritten if interrupt service delays occur. The part was originally made by National Semiconductor.


Pages using web citations with no URL. At speeds higher than baudowners discovered that the serial ports of the computers were not able to handle a continuous flow of data without losing characters.

National Semiconductor later released the A which corrected this issue. By using this site, you agree to the Terms of Use and Privacy Policy. Views Read Edit View history. This page was last edited on 28 Novemberat The A F version was a must-have to use modems with a data transmit rate of baud.

From Wikipedia, the free encyclopedia. Retrieved from ” https: The original had a bug that prevented this FIFO from being used.

The corrected -A version was released in by National Semiconductor.