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  • NCR 53C90 datasheet

    From Louis Ohland@21:1/5 to All on Mon Jun 13 08:49:55 2022
    https://datasheet.datasheetarchive.com/originals/scans/Scans-001/Scans-0032502.pdf

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  • From Louis Ohland@21:1/5 to Louis Ohland on Mon Jun 13 09:50:18 2022
    The NCR 609-3400367 is a 68 pin PLCC, NOT an 84 or 100 pin device.

    On 6/13/2022 09:34, Louis Ohland wrote:
    On 6/13/2022 08:49, Louis Ohland wrote:
    https://datasheet.datasheetarchive.com/originals/scans/Scans-001/Scans-0032502.pdf


    Huh, theC94, 95, and 96 came in 84 pin PLCC and 100 pin QFP. This
    suggests the NCR 609-3400367 is a 53C90 variant.

    Further thought, without proof, the PC4B50/HD "termination" might be something external to the SCSI controller. Not seeing any reference to a termination function in the 53C90...

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Louis Ohland@21:1/5 to Louis Ohland on Mon Jun 13 09:34:05 2022
    On 6/13/2022 08:49, Louis Ohland wrote:
    https://datasheet.datasheetarchive.com/originals/scans/Scans-001/Scans-0032502.pdf


    Huh, theC94, 95, and 96 came in 84 pin PLCC and 100 pin QFP. This
    suggests the NCR 609-3400367 is a 53C90 variant.

    Further thought, without proof, the PC4B50/HD "termination" might be
    something external to the SCSI controller. Not seeing any reference to a termination function in the 53C90...

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From IBMMuseum@21:1/5 to All on Mon Jun 13 20:06:41 2022
    https://datasheet.datasheetarchive.com/originals/scans/Scans-001/Scans-0032502.pdf


    Huh, theC94, 95, and 96 came in 84 pin PLCC and 100 pin QFP. This
    suggests the NCR 609-3400367 is a 53C90 variant.

    Further thought, without proof, the PC4B50/HD "termination" might be something external to the SCSI controller. Not seeing any reference to a termination function in the 53C90...

    I'll have some pictures of the Storage Dimensions and Storage Plus SCSI adapters that use the 53C94 - most of the high-end SCSI adapters that NCR used on their own systems used the 53C700 chip.

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