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Parallel NOR flash power supply design

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tramu

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Dear Sir,

I want to calculate the power requirement of an NOR flash from micron.

IC requires two power supplies: VCC(core) & VCCQ(I/O).

I calculated the power requirement of VCC(core) from the data sheet as VCC(max) * ICCW.

I want to calculate the power requirement of the VCCQ(I/O) supply.

I am not able to get the data from the vendor.

How, do I calculate the VCCQ(IO) supply power requirement of a NOR flash.

Please find the attached datasheet for reference.

Thanks in advance.

Regards,
Thulasi
 

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  • 208034_P33_65nm_SBC_64M_128M_Discrete_DS-1.pdf
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tramu said:
Dear Sir,

I want to calculate the power requirement of an NOR flash from micron.

IC requires two power supplies: VCC(core) & VCCQ(I/O).

I calculated the power requirement of VCC(core) from the data sheet as VCC(max) * ICCW.

I want to calculate the power requirement of the VCCQ(I/O) supply.

I am not able to get the data from the vendor.

How, do I calculate the VCCQ(IO) supply power requirement of a NOR flash.

Please find the attached datasheet for reference.

Thanks in advance.

Regards,
Thulasi
Click to expand...

well, this is not really the forum for that , but don't you need to calculate the io current by the rising/fallling time and the output load ?
 

aruipksni said:
well, this is not really the forum for that , but don't you need to calculate the io current by the rising/fallling time and the output load ?
Click to expand...

Hi aruipksni,

How do i calculate io current by rising/falling time and the output load ?

Please help in this direction. Please share any document/link to read...

Regards,
Thulasi
 

tramu said:
Hi aruipksni,

How do i calculate io current by rising/falling time and the output load ?

Please help in this direction. Please share any document/link to read...

Regards,
Thulasi
Click to expand...

1/ from datasheet get rise , fall time - see which is the fastest (lower value).
2/ get you maximum output capacity of the flash , add it to all the connected devices input capacity - so you have the total load.
3/ from schematc check what is your max i/o voltage.
4/ use the simple formula i =~u*c/min(tr,tf), and multiply by number of dq pins + other ctrl pins.
so for example : for 2.5v power supply , 10pf, capacity, 5 ns tr you get 5ma/pin.
 

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