SN54SC8T541-SEP: Is the Output Current Limit in SN54SC8T541-SEP Datasheet Specified Per Pin or Per Device?

Dhir Gandhi

Prodigy 110 points

Part Number: SN54SC8T541-SEP

Tool/software:

Hi all,
Is the output current mentioned in the datasheet per pin or the total current?

1 month ago

0 Joshua Salinas 1 month ago

TI__Genius 17500 points

Hello Dhir,

Current mentioned on the datasheet is per pin.

Regards,

Josh

0 Dhir Gandhi 1 month ago in reply to Joshua Salinas

Prodigy 110 points

Thanks, Joshua for the quick response!

Also, if that is the case, could you please clarify why the maximum current through Vcc or GND is specified as ±50 mA in the datasheet?

I would also appreciate it if you could confirm the maximum current consumption of the device overall under full load (+-25 mA per pin), as I need this information to properly design the power supply for the IC.

+1 Joshua Salinas 1 month ago in reply to Dhir Gandhi

TI__Genius 17500 points

Hello Dhir,

The maximum current through VCC or GND is the limitation of the total supply current to the part and should not surpass ±50mA. What you are asking is +25mA per pin (or 200mA in total) which will damage the device.

The output current parameter is given per pin but the total supply current cannot be greater than 50mA.

Regards,

Josh

0 Dhir Gandhi 1 month ago in reply to Joshua Salinas

Prodigy 110 points

Thanks Joshua!

0 Dhir Gandhi 1 month ago in reply to Dhir Gandhi

Prodigy 110 points

Hi Joshua,

I want to keep the device always enabled by tying the OE pins to GND, and I don't plan to control the pins with any external signal. Could you please advise on the appropriate termination resistor? I was considering using either a 0Ω or a 10kΩ resistor. Which one would be more suitable and why?

Regards,
Dhir

0 Joshua Salinas 1 month ago in reply to Dhir Gandhi

TI__Genius 17500 points

Hello Dhir,

Because the OE pin does not switch at high speeds, there isn't much concern with resistor sizing. Using 0Ω, 10kΩ or tying OE pin directly to GND will be fine.

Regards,

Josh

0 Dhir Gandhi 1 month ago in reply to Joshua Salinas

Prodigy 110 points

Thanks Josh!

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SN54SC8T541-SEP: Is the Output Current Limit in SN54SC8T541-SEP Datasheet Specified Per Pin or Per Device?