• State TI Thinks Resolved
  • Locked Locked
  • Replies 3 replies
  • Answers 2 answers
  • Subscribers 23 subscribers
  • Views 366 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

BQ4802LY: external SRAM

Ben Genereaux
Intellectual 1040 points
Part Number: BQ4802LY

Hi team,

I wanted to make sure I correctly understand how the external CMOS SRAM should be attached to the BQ4802LY. I’m under the impression that CS is used strictly to select the RTC registers and CE_IN is used strictly to select the external SRAM IC via CE_OUT to allow for the use of the full address range of the SRAM IC, can you confirm?

Is there a recommended 32k x 8 SRAM IC that would be suitable to pair with this IC?

Thanks,
Ben

  • 0
    TI__Mastermind 42060 points

    Hello Ben,

    Apologies for the delay on this. 

    This is a very old device, so information about it and support may be limited. I would recommend to find a newer IC similar to this device.

    The function for CS/CEIN is described in the READ MODE and WRITE MODE sections. You also find the operational truth table in Table 1 of the datasheet. I believe you are correct.

    Is there a recommended 32k x 8 SRAM IC that would be suitable to pair with this IC?
    We do not have a recommended IC. 

    Best Regards,

    Luis Hernandez Salomon

  • 0 in reply to Luis H. S.
    TI__Intellectual 1040 points

    Hi Luis,

    Does TI have any recommendation for parallel RTC/NVRAM parts? I am not seeing any alternates to BQ4802LY.

    Thanks,
    Ben

  • 0 in reply to Ben Genereaux
    TI__Expert 3425 points

    Hi Ben, 

    I've looked through the portfolio as well and do not see any new RTC's, this is an artifact of a TI acquisition some time ago. The screenshot shows the only offerings that may fit the requirement but it is mainly these older family of devices. 

    Best, 

    -Luis Torres