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The part was originally made by National Semiconductor.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

The A F version was a must-have to use modems with a data transmit rate of baud. Interfaces are listed by their speed in the roughly ascending order, so the interface at the end of each section should be the fastest.


16550 UART

Technical and de datasheeg standards for wired computer buses. The current version since by Texas Instruments which bought National 1c550 is called the D.

The C and CF models are okay too, according to this source. 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 stability of high-speed connections.

The original had a bug that prevented this FIFO from being used. From Wikipedia, the free encyclopedia. Similarly numbered devices, with varying levels of compatibility with the original National Semiconductor part, are made by other manufacturers.

This generated high rates of interrupts as transfer speeds increased.

National Semiconductor later released the A which corrected this issue. By using this site, you agree to the Terms of Use and Privacy Policy. The A and newer is pin compatible with the 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.


More critically, with only a 1-byte buffer there is a genuine risk that a received byte will be datashewt if interrupt service delays occur. To overcome these shortcomings, the series UARTs incorporated a byte FIFO buffer with a programmable interrupt trigger of 1, 4, 8, or 14 bytes.

The Art of Serial Communication. This page was last edited on 28 Novemberat Retrieved from ” https: Not all manufacturers adopted this nomenclature, however, continuing to refer to the fixed chip as a The also 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.