SN74LVC3G17: Power dissipation

Pedaiah G

Prodigy 50 points

Part Number: SN74LVC3G17

Hi,

I would like to use SN74LVC3G17DCUR as replacement for the Part: 74LVC3G17GT,115.

Can you please clarify the below details for the above part:

Maximum Power dissipation.
Quiscent current.

Thanks for your support.

8 months ago

0 Albert Xu1 8 months ago

TI__Mastermind 45845 points

Hi Pedalah,

1. Please refer to this FAQ: [FAQ] Where do I find maximum power dissipation for a device?

2. Quiescent current is our Icc spec in the datasheet.

0 Pedaiah G 8 months ago in reply to Albert Xu1

Prodigy 50 points

Hi Albert, thank you for your quick response.

I am using the SN74LVC3G17DCUR device, but I could not find the maximum junction temperature (Tj(max)) in the datasheet. Therefore, I assumed 150 °C as a standard value for logic devices.

Below are the calculated Pmax values for different ambient temperatures:

Are the above estimations and calculated Pmax values correct?
I am operating this device at 3.3 V Vcc and using it for buffering a 100 kHz clock signal. Based on the datasheet, my understanding is that the maximum current it can draw is 100 mA, regardless of the input clock frequency passing through it. Is this interpretation correct?

0 Albert Xu1 7 months ago in reply to Pedaiah G

TI__Mastermind 45845 points

Hi Pedaiah,

1. Yes, this should be correct.

2. 100mA is the abs max value, but highest recommended is 32mA (based on IOH/IOL).

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SN74LVC3G17: Power dissipation