SN74HC573A-Q1: Quiescent current question

Lanxi Li

Part Number: SN74HC573A-Q1

Hello team,

1. What are the quiescent working current and normal working current of SN74HC573A-Q1?

2. How to understand the two parameters in the figure below?

Best regards,

Lanxi

0 Clemens Ladisch over 1 year ago

Guru 272280 points

I_I is the input leakage current, i.e., the current that flows into or out of an input pin. It is so small that it is often ignored.

I_CC is the quiescent current, i.e., the current that flows into V_CC and out of GND when the device is idle. When the device is switching, there is additional current, measured by C_pd. Additionally, there might be a noticeable output current, depending on the load. See [FAQ] How do I Calculate Power Consumption or Current Consumption for my CMOS Logic Device?

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