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Original question:

AM68A: Why can’t I purchase XJ721S25AALZ for my custom board?

AM68A: Not able to procure P87334ERHDRQ1

Rohith K P
Prodigy 190 points
Part Number: AM68A

Tool/software:

Hello TI Team,

I am designing a custom board based on the AM648A reference design, which uses the P87334ERHDRQ1 PMIC.

Unfortunately, I am not able to procure P87334ERHDRQ1 due to supply constraints.

I would like to know if I can use LP87334DRHDR as a direct substitute on my custom board.

From the datasheet, it appears that both parts are pin-to-pin compatible and have identical electrical characteristics. I understand that the Q1 version may have AEC-Q100 qualification and larger reel packaging, but my design does not have an automotive compliance requirement.

Could you please confirm:

  1. Is there any functional or electrical difference between P87334ERHDRQ1 and LP87334DRHDR?
  2. Will there be any risk in using LP87334DRHDR in place of P87334ERHDRQ1 for my AM648A custom board?
  • 0
    TI__Genius 10047 points

    Hello Rohith, 

    P87334ERHDRQ1 was a pre-production part number, the released part number should be LP87334ERHDR (non-automotive).

    LP87334ERHDR is the recommended PMIC for AM68x, more information can be found in this application note:

    AM68x Processor Power Solutions Using LP87334E PMIC for Industrial Applications

    1. The -E and -D versions will have different pre-programmed voltage levels and timing sequences for the output rails. 
    The settings of the -E version are optimized for AM68x voltage and timing requirements. 

    More information on the specific settings can be found in their respective TRMs:

    LP87334E Technical Reference Manual

    LP87334D Technical Reference Manual

    2. If you are able to use I2C to adjust the register settings of -D upon every power cycle, then -D can be used. 
    Otherwise, it is recommended to stick with the -E version that has the preprogrammed default settings compatible with AM68x.

    Hope this helps to clarify, let me know if you have any additional questions.

    Best Regards, 
    Sarah