• TI Thinks Resolved

# SN74LVC2G74-Q1: max Ioff current at the 25°C and 85°C

Part Number: SN74LVC2G74-Q1

Dear team,

My customer wants to know below questions, could you please help answer? Because they need to compute thesystem's  total Ioff which exceeds the requirements now. Their VCC is 5V.

what is the max Ioff when the temperature is 25°C ?

what is the max Ioff when the temperature is 85°C ?

In our datasheet, Ioff's max value is 10uA. What is the test temperature? It should be at the 125°C ,right?

Thanks & Best Regards,

Sherry

• Hey Sherry,

Max Ioff at both of those temps would still be 10 uA.

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• In reply to Dylan Hubbard:

Hi Dylan,

When the customer test the Ioff at 25 and 85, they are smaller than 10uA.

Thanks & Best Regards,

Sherry

• In reply to Sherry Liang:

Hi Sherry,

Yes, that's what "maximum" means. When they measure the value, it will be less than the maximum, guaranteed.

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• In reply to Emrys Maier:

Hi Emrys,

My customer needs to make a theoretical calculation, this value can't exceed the specified value, which is required by the end customer.

But now the theoretical value doesn't meet the requirement.

In my understanding, if the temperature is lower, the Ioff current should smaller, right? How do we get the the value of 10uA? Could you please tell me the process? In the test, different device's Ioff is different, and they will have a max value-10uA, so we write the max value is 10uA, right? Then when you test it, at the different temperature, the test results are the same? The max value are all 10uA?

Thanks & Best Regards,

Sherry

• In reply to Sherry Liang:

Hi Sherry,

If 10uA doesn't meet the customer's requirement, then they should redesign their system. We do not guarantee any other value, and it's poor system design to use any other value than the max since the manufacturer (ie TI) won't guarantee that performance.

The maximum value is across PVT (process variations, voltage variations, and temperature variations).  This is the worst case possible value, plus some headroom to protect TI.  We do not characterize each temperature separately, nor do we guarantee them separately.