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Understanding SRAM current consumption-71V35761S166PFGI

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Bjtpower

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Hi,

I have SRAM 71V35761S166PFGI in my circuit and i wanted to check worst case current consumption for the same IC.
i have passed through datasheet and i am confused getting exact max current required for the SRMA IC.

SRAM is interfaced with Microcontroller
 
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Has to be interpolated using "DC Electrical Characteristics", using clock frequency and enable duty cycle information from your application. As stated, the current values are maximum guaranteed values, actual or "typical" current consumption will be probably lower.

1704454061463.png
 
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FvM said:
Has to be interpolated using "DC Electrical Characteristics", using clock frequency and enable duty cycle information from your application. As stated, the current values are maximum guaranteed values, actual or "typical" current consumption will be probably lower.

View attachment 187555
Click to expand...
How to get typical current consumption? Assumed Clk frequency: 200MHZ, Duty cycle: 0.5
 
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Hi,

according the datasheet it shows 360mA at 200MHz and 320mA at 166MHz.
Thus the dynamic consumption is 40mA/36MHz or 235mA at 200MHz.

The static current is 360mA - 235mA = 125mA. at 50% duty cycle it´s about 65mA.

The other 50% is standby current of 30mA. --> 15mA

So total 315mA.
But there will be additional current due to pin capacitance of 7pF each IO. It surely depends on code - which we don´t know. I = 0.5 * C * V * V * f
And there is the RAM_independent trace capacitance and pin capacitance of connected ICs. We don´t know.

Klaus
 
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