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SN75C3232: The difference between SN65C3232DW and SN75C3232DW

Jamie Tseng
Intellectual 2405 points
Part Number: SN75C3232
Other Parts Discussed in Thread: MAX3232, TRSF3232, TRSF3232E,

Hi team,

The customer has previously used MAX3232CDWΩ (MAX3232 3V to 5.5V Multichannel RS-232 Line Driver/Receiver)

MAX3232CDW => runs at speeds of up to 250 kbit/s.
Considering that UART currently requires higher speeds (921600), they want to replace the new IC with the original PCB.

We find TI corresponding solution is
SN65C3232DW
Or
SN75C3232DW
May I know the difference of 65 / 75?

Is there any other recommend solution?

Thanks!

BRs,

Jamie

  • 0
    Guru 258710 points

    The only difference between SN65 and SN75 is the temperature range.

    These SNx5 device are older. The MAX and TRS devices are identical, but TRSF devices are faster. And devices with an E suffix have better ESD protection. So consider the TRSF3232(E).

  • 0
    TI__Guru 53160 points

    Hi Jamie,

    Jamie Tseng said:
    SN65C3232DW
    Or
    SN75C3232DW
    May I know the difference of 65 / 75?

    As Clemen's has pointed out, the main difference is SN75 supports 0C to 70C whereas the SN65 supports -40C to 85C. 

    The newest/latest version of this device would be the TRSF3232E which is promoted on the product page for the SN65/SN75 devices as the recommended replacement. Please note that the DW packages for TRSF3232E is on lifetime buy. 

    -Bobby

  • 0
    TI__Mastermind 45747 points

    Hi Jaime,

    The difference is temperature range - SN75 has the same temperature range of "C" versions (MAX3232CDW) and the SN65 has an industrial temperature range - so it extends beyond the MAX3232CDW temperature range. I will say that the "DW"  package of the SN75C3232 and SN653232 is going to be discontinued - it is currently in Last Time Buy. So this is not a good solution for longevity. These parts will still be available in other packages - but the DW package will be discontinued. 

    As Clemens mentioned the TRSF3232E would be most likely the best choice. However the issues is similar to above - the TRSF3232ECDWR is going to be discontinued. The closest package would be the "D" package - which is a SOIC but the length and width of the package are smaller than the currently used package. This is our best option - but we our DW parts are largely being discontinued. 

    Best,

    Parker Dodson

  • 0 in reply to Parker Dodson
    TI__Intellectual 2405 points

    Hi Parker,

    Thanks for the reply.

    Due to customer PCB size, "D" package cannot be used.

    May I know for new project, TRSF3232ECDWR is the recommend choice?

    TRSF3232ECDWR

    SN65C3232DW

    SN75C3232DW

    BRs,

    Jamie

  • 0 in reply to Jamie Tseng
    TI__Mastermind 45747 points

    Jaime,

    As I said above -the DW package isn't advised because all of them are being discontinued customer can LTB them now before they are discontinued - but they probably should look at redesigning the footprint - considering that they are using the largest package a redesign would not increase the amount of board space needed to support a smaller package. 

    Essentially they need to redesign or there won't be units available eventually. You can LTB the TRSF3232ECDWR at the moment - but if they run out of material after we discontinue the device they will be forced to redesign anyway - so they it might be beneficial to do it now.

    Best,

    Parker Dodson