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ISO7741-Q1: VCC1≠VCC2 condition

Ryoma Ohashi
Intellectual 2580 points
Part Number: ISO7741-Q1

Hi team,

My customer is considering to use this device.

In the datasheet, all of the characteristics are shown in the condition of VCC1=VCC2.

Can the customer use this device in a condition like below?

VCC1=5V

VCC2=3.3V

If they uses in this condition, does the characteristic differs a lot from the datasheet?

Regards,

Ohashi

  • +1
    TI__Mastermind 24485 points

    Hello Ohashi-san,

    Yes, the device can be configured with different voltage levels for VCC1 and VCC2 and will work with the setup suggested.

    The parameters of the device will follow the electrical characteristics labelled in the datasheet for each independent VCC. You can look at VCC = 3.3V for the input and output characteristics corresponding to that output. 

    Hope that this helps!

    Best,
    Michael

  • 0 in reply to Michael J Schultis
    TI__Intellectual 2580 points

    Hi Michael

    Thanks for the reply.

    I have an additional question.

    If we lose one of the Vcc and the other Vcc keep on delivering the power, does this device become broken?

    I know that with only one Vcc, the function will go down. But we want to know whether that situation lead the device to be broken.

    Regards,

    Ohashi

  • +1 in reply to Ryoma Ohashi
    TI__Mastermind 49415 points

    Hi Ohashi-san,

    Thanks for following up.
    Powering up only one VCC and not powering up or losing the other one doesn't lead to any device damage. Since the device has two independent die that are powered independently, not powering up any of those is not a problem. The device will follow its function table listed in the datasheet. Thanks.


    Regards,
    Koteshwar Rao