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Data Sheet
Rev.1.1
09.06.2010
AC CHARACTERISTICS
3200-3033
2700-2533
PARAMETER
ACTIVE to PRECHARGE command
SYMBOL
t RAS
MIN
40
MAX
70.000
MIN
42
MAX
70.000
Unit
ns
ACTIVE to READ with Auto
precharge
command
ACTIVE to ACTIVE/AUTO
REFRESH
command period
t RAP
t RC
15
55
15
60
ns
ns
AUTO REFRESH command period
ACTIVE to READ or WRITE delay
PRECHARGE command period
t RFC
t RCD
t RP
70
15
15
72
18
18
ns
ns
ns
DQS read preamble
DQS read postamble
ACTIVE bank a to ACTIVE bank b
command
DQS write preamble
DQS write preamble setup time
DQS write postamble
t RPRE
t RPST
t RRD
t WPRE
t WPRES
t WPST
0.9
0.4
10
0.25
0
0.4
1.1
0.6
0.6
0.9
0.4
12
0.25
0
0.4
1.1
0.6
0.6
t CK
t CK
ns
t CK
ns
t CK
Write recovery time
Internal WRITE to READ command
delay
Data valid output window
REFRESH to REFRESH command
interval
Average periodic refresh interval
Terminating voltage delay to V DD
Exit SELF REFRESH to non-READ
command
Exit SELF REFRESH to READ
command
t WR
t WTR
na
t REFC
t REFI
t VTD
t XSNR
t XSRD
15
2
t QH - t DQSQ
70.3
7.8
0
70
200
15
1
t QH - t DQSQ
70.3
7.8
0
75
200
ns
t CK
ns
μs
μs
ns
ns
t CK
Note 1: Values for AC timing, IDD, and electrical AC and DC characteristics might have been collected within the
standard temperature range and at nominal reference/supply voltage levels, but the related specifications and
device operation are guaranteed for the full voltage range specified and for the corresponding field of operation
according to the actual temperature grade of the module (extended E, I or W; refer to the environmental conditions
for more details).
Swissbit Germany AG
Wolfener Stra?e 36
D-12681 Berlin
Fon: +49 (0) 30 93 69 54 - 0
Fax: +49 (0) 30 93 69 54 - 55
www.swissbit.com
eMail: info@swissbit.com
Page 9
of 12
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