TPS3305 /RESET Sink Capability...

Circuit Tester

Other Parts Discussed in Thread: TPS3305

Hi - Just trying to figure out the specs for the TPS3305 /RESET current sinking. There isn't much/anything about the electrical characteristics of /RESET in the datasheet, other than the absolute maximum Iout data - presumably a source/driver spec.

Does anyone know the current sinking capability of /RESET on this supervisor IC. Can I assume 5mA max? It would be nice if TI were a little more clear on this issue.

Thanks for the help. Here is the URL to the device: http://focus.ti.com/docs/prod/folders/print/tps3305-18.html

over 14 years ago

0 Circuit Tester over 14 years ago

Prodigy 50 points

Thx for moving my thread to the correct forum. Wish someone from TI would answer it. :-/ Alas.

0 Scot Lester over 14 years ago

TI__Expert 5640 points

The Absolute Maximum is stated as 5ma. This is a DC spec ification so a maximum of 5ma DC or sustained current.

0 Circuit Tester over 14 years ago in reply to Scot Lester

Prodigy 50 points

Thx - I will let you know if it works. I think it would help developers if TI could update the datasheet to call out the source/sink capabilities of /RESET + RESET along with the input signals to eliminate any potential confusion.

0 Matthew Day over 14 years ago in reply to Circuit Tester

TI__Mastermind 36110 points

Per the TPS3305 datasheet abs max table, you can constantly sink 5mA. However, the electrical characteristics table provides the test current used to measure the output voltage. The output voltage will be less than 0.4V when the sink current is less than 2mA and Vin is greater than 3.3V.

0 Circuit Tester over 14 years ago in reply to Matthew Day

Prodigy 50 points

My Vin is 3.3V. I am trying to sink 2mA when the TPS3305 is driving /RESET low. So - seems like it would work.

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TPS3305 /RESET Sink Capability...