HMT351U6AFR8C-G7 Datasheet, PDF (42/47 Pages) Hynix Semiconductor – 240pin DDR3 SDRAM Unbuffered DIMMs

HMT351U6AFR8C
HMT351U7AFR8C
7. Electrical Characteristics and AC Timing
7.1 Refresh Parameters by Device Density
Parameter
REF command to
ACT or REF
command time
Average periodic
refresh interval
tREFI
Symbol
tRFC
512Mb 1Gb 2Gb 4Gb 8Gb Units
90
110 160 300 350
ns
0 ×C < T_CASE < 85 ×C
85 ×C < T_CASE < 95 ×C
7.8
7.8 7.8 7.8 7.8
us
3.9
3.9 3.9 3.9 3.9
us
Rev. 0.02 / Apr 2009
42