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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Technical and de facto standards for wired computer buses.

The A F version was a must-have to use modems datssheet a data transmit rate of baud. Retrieved from ” https: The C and CF models are okay too, according to this source. By using this site, you agree to the Terms of Use and Privacy Policy.

Similarly numbered devices, with varying levels of compatibility with the original National Semiconductor part, are made by other manufacturers. From Wikipedia, the free encyclopedia. The A 1c6550 newer is pin compatible with the To overcome these shortcomings, the series UARTs incorporated a byte FIFO buffer with a programmable interrupt trigger of daatasheet, 4, 8, or 14 bytes.


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

Dropouts occurred with Views Read Edit View history. The corrected -A version was released in by National Semiconductor.

UART – Wikipedia

Interfaces are listed by their speed in the roughly ascending order, so the interface at the end of each section should be the fastest. 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. This generated high rates of interrupts as transfer speeds increased.

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. The original had a bug that prevented this FIFO from being used.

16550 UART

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 new chip, improved the reliability and datassheet of high-speed connections. Pages using web citations with no URL. The Art of Serial Communication.


The part was originally made by National Semiconductor. The also incorporates a datashheet 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.

This page was last edited on 28 Novemberat Not all manufacturers adopted this nomenclature, however, continuing to refer to dahasheet fixed chip as a National Semiconductor later released the A which corrected this issue.