# NCR 5380

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The **NCR 5380** is an early [SCSI](/source/SCSI) controller chip developed by [NCR Microelectronics](/source/NCR_Corporation). It was popular due to its simplicity and low cost. The 5380 was used in the [Macintosh Plus](/source/Macintosh_Plus) and in numerous SCSI cards for personal computers, including the [Amiga](/source/Amiga) and [Atari TT](/source/Atari_TT). The 5380 was [second sourced](/source/Second_source) by several chip makers, including [AMD](/source/AMD) and [Zilog](/source/Zilog). The 5380 was designed by engineers at the NCR plant then located in Wichita, Kansas, and initially fabricated by NCR Microelectronics in Colorado Springs, Colorado. It was the first single-chip implementation of the SCSI-1 protocol.

The NCR 5380 also made a significant appearance in [Digital Equipment Corporation](/source/Digital_Equipment_Corporation)'s [VAX](/source/VAX) computers, where it was featured on various [Q-Bus](/source/Q-Bus) modules and as an integrated SCSI controller in numerous [MicroVAX](/source/MicroVAX), [VAXstation](/source/VAXstation) and [VAXserver](/source/VAXserver) computers. Many UMAX SCSI optical scanners also contain the 53C80 chip interfaced to an Intel 8031-series microcontroller.

Single-chip SCSI controller **NCR 53c400**[1] used SCSI 5380 core.

## See also

- [NCR 53C9x](/source/NCR_53C9x)

## References

1. BYTE Magazine, 1988 №9

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Adapted from the Wikipedia article [NCR 5380](https://en.wikipedia.org/wiki/NCR_5380) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/NCR_5380?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.