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LM1881: LM1881

SANTHOSH RAJAGOPALAN
Prodigy 80 points
Part Number: LM1881

Hi,

From the datasheet it seems that the Vcc voltage at 8th pin of LM1881 IC ranges from 5 to 12V.

We can understand 12V is the maximum acceptable voltage at this pin.

What is the minimum acceptable voltage at this pin? Is it 5V?

Can the board function normally, say when Vcc drops to 4.9V.

Please inform the exact minimum Vcc voltage below which the IC LM1881 ceases to function.

Please clarify on this ASAP.

Thanks a lot in advance.

  • 0
    TI__Genius 14485 points
    Hello Santhosh,

    TI only guarantees normal functionality between 5 V and 12 V for this device. The device likely will function normally at less than 5V, but we do not guarantee the device to operate within datasheet specifications in this range.

    Would you please provide some more details about your application and why you need to operate at a supply voltage lower than 5 V? This information will help me to persuade my group to investigate your question deeper.
  • 0 in reply to James Lockridge19
    Prodigy 80 points

    Hi James,

    Thanks for the reply.

    The supply voltage in our application for this LM1881 IC is still 5V.

    But due to power supply +5V regulation uncertainties (during full load of +5V on the PSU), I wish to understand the lowest recommended operating supply voltage for LM1881.

    So, from your reply it seems that even a supply voltage of +4.99V does not guarantee the recommended operation on this LM1881 IC. Is that correct?

    Thanks for the support.

  • 0 in reply to SANTHOSH RAJAGOPALAN
    TI__Genius 14485 points

    Santhosh,

    Correct. TI only tests for the 5-V condition. We do not guarantee the electrical characteristics will be within the same tolerance at a lower voltage, but the device should survive a lower-voltage condition (Absolute Maximum table does not have a minimum voltage).