W3E232M16S-XSTX Datasheet, PDF (15/22 Pages) White Electronic Designs Corporation – 2x32Mx16bit DDR SDRAM

White Electronic Designs
W3E232M16S-XSTX
PRELIMINARY*
ELECTRICAL CHARACTERISTICS & RECOMMENDED AC OPERATING CONDITIONS DDR400
-40°C ≤ TA ≤ +85°C; VCCQ = +2.5V ±0.2V, VCC = +2.6V ±0.1V Notes: 1-5, 14-17. 33
AC Characteristics
Parameter
Data valid output window (DVW)
REFRESH to REFRESH command interval
Average periodic refresh interval
Internal WRITE to READ command delay
Terminating voltage delay to VDD
Exit SELF REFRESH to non-READ command
Exit SELF REFRESH to READ command
Symbol
tWTR
N/A
tREFC
tREFI
tVTD
tXSNR
tXSRD
DDR400
Min
Max
2
tQH - tDQSQ
70.3
7.8
0
70
200
Unit
Notes
tCK
ns
25
µs
23
µs
23
ns
ns
tCK
White Electronic Designs Corp. reserves the right to change products or specifications without notice.
December 2005
Rev. 1
15
White Electronic Designs Corporation • [phone] • www.wedc.com