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SN75160B: Discontinuance of Select RS485 Devices, PDN# 20230516001.3 (SN75160B, SN75161B)

Richard Cashin
Prodigy 50 points
Part Number: SN75160B
Other Parts Discussed in Thread: SN75ALS160, SN65C1167E, CY74FCT245T, SN74ABT245B

We recently received an EOL notice for the GPIB/IEEE-488 Transceivers (SN75160BDW and SN75161BDW). This announcement has caused some concerns within our team as we have a substantial amount of legacy equipment that still utilizes GPIB and which we continue to support.  (ref. Texas Inst. PDN# 20230516001.3)

I understand the entire fabrication process for these parts is shutting down. We are particularly concerned about the lack of a form, fit, and function (FFF) drop-in replacement. This situation could require a significant redesign and retesting effort on our part.

Given the potential impact on our business, I would appreciate further information or guidance you could provide on this matter. Specifically, we're looking for clarification about TI's transition plan for these components.

Note: 
There is confusion between the parts listed in TI's PCN and TI's website status for these parts.  
The SN75160BDWR and SN75161BDWR versions are active with ten-year lifecycle, the datasheet states the package size is the main difference, with 2000 pieces per reel.
It’s curious that these versions aren't included in the PCN, are all fab sites for this part shutting down? Looking at TI's PCN, it states they're shutting down the entire fab site, all their devices, regardless of how they're packaged, are discontinued. Their statement about closing the 150-millimeter production at the current fab site is not providing alternate sites for these parts.

  • 0
    TI__Mastermind 46607 points

    Hi Richard,

    1. The parts that are shipped in a reel ("R suffix") are the same material  that is is shipped in a tube (sans "R" suffix)  - they should be EOL'd as well; I will check internally why they didn't show up on the PCN because to my understanding they should be there.  The site has a delayed response from issuance of PCN and reflection on TI.com - that's why it isn't shown on TI.com

    2. We don't have a great replacement for this device - the one suggested probably won't work in most applications and there would most likely need to be redesign to support other devices. 

    3. I'd highly suggest you reach out to your local field representative as they will be better equipped to handle supply questions and help you secure some of the material that we have as I am not really able to help on the supply side of things. If you don't have an assigned field rep - the best option is to secure as much inventory as reasonable for your application to buy time for a redesign. I 100% understand this is far from an ideal scenario - but this just hasn't been an investment area for us for a long time so we don't have great alternates to support this standard anymore. 

    Best,

    Parker Dodson 

  • 0
    Prodigy 20 points

    Hi Parker,

    1. Does this also include the SN75ALS160?   

    2. The recommend replacement part for SN75160BDW on the PCN is SN65C1167ENSR.  What factory is the SN65C1167ENSR manufactured and will it also soon be discontinued?

    Thanks

    -Aaron

  • 0 in reply to Aaron McClure
    Guru 277220 points

    1. The SN75ALS160N is in the list, but the SN75ALS160DW(R) is not. This appears to be the same error; all packages will be EOL'd.

    2. The SN65C1167E is an RS-422 transceiver. This is electrically not compatible with GPIB. There is no replacement for the SN75*160.

  • 0 in reply to Clemens Ladisch
    Prodigy 20 points

    Hi Clemins,

    Thanks for clearing this up.  I guess I would have figured out the TI recommended replacement would not have worked once I dug into the old design.  Maybe I can talk the company into punting with a last time buy to support our design.

    -Aaron

  • 0 in reply to Aaron McClure
    TI__Mastermind 46607 points

    Hi Aaron,

    Clemens is correct - and I do think telling your customer to put in a last time buy would help as we really don't have a great replacement - the one listed is our "closest" so we have something listed but it's not really a great or practical solution.

    Best,

    Parker Dodson

  • 0 in reply to Aaron McClure
    Guru 277220 points

    IEEE-488 actually uses TTL voltage levels; it might be possible to use strong transceivers like the CY74FCT245T or SN74ABT245B.