SN74LVC2G74-Q1: The max pulse current into the output pin

Bob Zhang

Part Number: SN74LVC2G74-Q1

Hi team,

Our customer is using SN74LVC2G74-Q1 in their design.

There is a capacitive load connectted the output pin and will result a 120mA/70ns pulse to the output pin.

I have not found the parameters related to this in our datasheet.

Will it damage our chip? and do we have the value for this withstand current/voltage?

Best Regards

Bob Zhang

0 Clemens Ladisch over 1 year ago

Guru 256980 points

A capacitive load of up to 70 pF is OK.

But otherwise, the absolute maximum rating of 50 mA must not be exceeded. Add a series resistor to limit the current.

0 Bob Zhang over 1 year ago in reply to Clemens Ladisch

Hi Clemens,

Thanks for your reply.

Is 70 pf the maximum value?

Also from the datasheet, it seems 50 mA is the constant current.

For this case, the customer has a pulse of 120mA/70 ns.

I think the pulse value could be greater comparing with the constant value.

Is this within the range?

Best Regards

Bob

0 Clemens Ladisch over 1 year ago in reply to Bob Zhang

Guru 256980 points

With 70 pF, the current is exceeded for only two nanoseconds or so.

120 mA for 70 ns exceeds the absolute maximum ratings and can damage the device.

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