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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This generated high rates of interrupts as transfer speeds increased.

The C and CF models are okay too, according to this source. The A and newer is pin compatible with the 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. By using this site, you dataseet to the Terms of Datashfet and Privacy Policy. Retrieved from ” https: The Art of Serial Communication. 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.

The part was originally made by National Semiconductor. Dropouts occurred with 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. Pages using web citations with no URL.

16550 UART

This page was last edited on 28 Novemberat Similarly numbered devices, with varying levels of compatibility with the 1c6550 National Semiconductor part, are made by other manufacturers. Technical and de facto standards for wired computer buses.

Not all manufacturers adopted this nomenclature, however, datzsheet to refer to the fixed chip as a 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.

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UART – Wikipedia

National Semiconductor later released the A which corrected this issue. Interfaces are listed by their speed catasheet the roughly ascending order, so the interface at the end of each section should be the fastest.


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

The corrected -A version was released in by National Semiconductor. Dayasheet A F version was a must-have to use modems with a data transmit rate of baud. To overcome these shortcomings, the series UARTs incorporated a byte FIFO buffer with a programmable interrupt trigger of 1, 4, 8, or 14 bytes.