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TCAN1042H: MAX3053ESA Replace Plan

Kuan Wei Chen (Kevin Chen)
Genius 9710 points
Part Number: TCAN1042H
Other Parts Discussed in Thread: SN65HVD251

Dear Team,

The customer is using MAX3053ESA, which one will you suggest to replace?

The customer mentioned Maxim's pin5 enable function is necessary.

Please help on it.

BR

Kevin

  • 0
    TI__Guru 74282 points

    Kuan Wei,

    The auto-shutdown function is not something that any of CAN transceivers have available. We do have a shutdown mode on two of our 3.3V CAN transceivers, but it is not the same function as auto-shutdown. Our shutdown mode puts the device in an absolute low-power mode when pin 5 is set to a logic high.

    Can you explain how they are using pin 5 on the Maxim part? We may be able to figure out another part if they aren't using the auto-shutdown function as it is supposed to be used.

    Regards,

  • 0 in reply to Eric Hackett
    TI__Genius 9710 points
    Dear Eric,
    Thanks for the reply.
    The customer will need to have shutdown mode function, because they have other communication sharing the same bus.
    So they will prefer shutdown mode.
    Please suggest the suitable one, appreciated.
    BR
    Kevin
  • 0 in reply to Kuan Wei Chen (Kevin Chen)
    TI__Guru 74282 points
    Kuan Wei,

    Okay, we don't have any devices that have the auto-shutdown feature that the Maxim device has, that's why I was curious of how they were using that function. IF they are using it in the auto-shutdown mode, we don't have a device like this. However, if they are just driving it high or low to place it in a low-power mode, then we can work with that. Does the shutdown function need to be on pin 5?

    Regards,
  • 0 in reply to Eric Hackett
    TI__Genius 9710 points
    Dear Eric,
    NO, the shutdown function is not necessary on pin5.
    Which solution will you suggest here?
    I can double check with the engineer.
    BR
    Kevin
  • 0 in reply to Kuan Wei Chen (Kevin Chen)
    TI__Guru 74282 points

    Kuan Wei,

    I would also check how they are using the shutdown pin. There is the auto-shutdown function and setting pin 5 high or low to toggle shutdown mode.

    Shutdown mode is similar to standby mode on our TCAN1042, but there are a few differences. In both devices, the low-power mode disables most functions except for the receiver in a low-power state. However, the wake-up mechanism for both devices is quite different. While the TCAN1042 uses the standard CAN wake-up signal, the Maxim device wakes up by sensing a voltage greater than 9V on the CANH pin. Standby mode on the TCAN1042 also consumes less current than shutdown mode on the Maxim device.

    If you can figure out more details of what they need from the shutdown function on the Maxim device, we can find a device that will fit their needs.

    Regards,

  • 0 in reply to Eric Hackett
    TI__Genius 9710 points
    Dear Eric,
    Can you list down the candidate solution and let me know what is the different function?
    I will check with customer they can use our solution or not.
    BR
    Kevin
  • 0 in reply to Kuan Wei Chen (Kevin Chen)
    TI__Guru 74282 points

    Kuan,

    The MAX3053ESA has a slope control pin at pin 8, and shutdown mode on pin 5.

    We have older CAN devices that have slope control on pin 8 like the SN65HVD251, and this pin can also put the device into standby mode (very similar in function to the shutdown mode on the MAX3053ESA). However, pin 5 on the SN65HVD251 is a VCC/2 output voltage to help stabilize the common-mode level.

    We also have the TCAN1042 which has standby mode control on pin 8(again, standby mode is very similar to the shutdown mode on the MAX3053ESA), and has either a no connect or an IO level voltage supply on pin 5.

    Once it is understood how the customer is using the MAX3053ESA, we should have a better idea of what part to recommend.

    Regards,