H5PS1G63JFRS6C datasheet(42/62 Pages) HYNIX

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H5PS1G63JFRS6C Datasheet(PDF) 42 Page - Hynix Semiconductor

Part No.	H5PS1G63JFRS6C

Description	1Gb DDR2 SDRAM

Download	62 Pages

Scroll/Zoom	100%

Manufacturer	HYNIX [Hynix Semiconductor]

Direct Link	http://www.skhynix.com/kor/main.do

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42 / 62 page

Rev. 1.7 / Nov 2011

Release

H5PS1G63JFR Series

the same amount as the actual amount of tCH (avg) offset present at the DRAM input with respect to 0.5.

For example, if an input clock has a worst case tCH (avg) of 0.48, the tAOF, min should be derated by sub-

tracting 0.02 x tCK (avg) from it, whereas if an input clock has a worst case tCH (avg) of 0.52, the tAOF,

max should be derated by adding 0.02 x tCK (avg) to it. Therefore, we have;

tAOF, min (derated) = tAC, min - [0.5 - Min(0.5, tCH (avg), min)] x tCK (avg)

tAOF, max (derated) = tAC, max + 0.6 + [Max(0.5, tCH (avg), max) - 0.5] x tCK (avg)

tAOF, min (derated) = Min (tAC, min, tAC, min - [0.5 - tCH (avg), min] x tCK (avg))

tAOF, max (derated) = 0.6 + Max (tAC, max, tAC, max + [tCH (avg), max - 0.5] x tCK (avg))

where tCH (avg), min and tCH (avg), max are the minimum and maximum of tCH (avg) actually measured

at the DRAM input balls.

Note that these deratings are in addition to the tAOF derating per input clock jitter, i.e. tJIT (duty) and

tERR(6-10per). However tAC values used in the equations shown above are from the timing parameter

table and are not derated. Thus the final derated values for tAOF are;

tAOF, min (derated _ final) = tAOF, min (derated) + {- tJIT (duty), max - tERR(6-10per),max}

tAOF, max (derated _ final) = tAOF, max (derated) + {- tJIT (duty), min - tERR(6-10per),min}

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