
Table 12: Electrical Characteristics and Recommended AC Operating Conditions (Continued)
Notes 1–9 apply to all the parameters in this table; VDD/VDDQ = 1.70–1.95V
Parameter
Symbol
-5
-54
-6
-75
Unit Notes
Min
Max
Min
Max
Min
Max
Min
Max
Data valid output window
(DVW)
n/a
tQH - tDQSQ
ns
Half-clock period
tHP
tCH,
tCL
–
tCH,
tCL
–
tCH,
tCL
–
tCH,
tCL
–
ns
Data-out High-Z
window from CK/
CK#
CL = 3
tHZ
–
5.0
–
5.0
–
5.0
–
6.0
ns
CL = 2
–
6.5
–
6.5
–
6.5
–
6.5
ns
Data-out Low-Z window
from CK/CK#
tLZ
1.0
–
1.0
–
1.0
–
1.0
–
ns
Address and control input
hold time (fast slew rate)
tIHF
0.9
–
1.0
–
1.1
–
1.3
–
ns
Address and control input
hold time (slow slew rate)
tIHS
1.1
–
1.2
–
1.3
–
1.5
–
ns
Address and control input
setup time (fast slew rate)
tISF
0.9
–
1.0
–
1.1
–
1.3
–
ns
Address and control input
setup time (slow slew rate)
tISS
1.1
–
1.2
–
1.3
–
1.5
–
ns
Address and control input
pulse width
tIPW
2.3
–
2.5
–
2.6
–
tIS +
tIH
–
ns
LOAD MODE REGISTER
command cycle time
tMRD
2
–
2
–
2
–
2
–
tCK
DQ–DQS hold, DQS to first
DQ to go nonvalid, per ac-
cess
tQH
tHP -
tQHS
–
tHP -
tQHS
–
tHP -
tQHS
–
tHP -
tQHS
–
ns
Data hold skew factor
tQHS
–
0.5
–
0.5
–
0.65
–
0.75
ns
ACTIVE-to-PRECHARGE
command
tRAS
40
70,000
42
70,000
42
70,000
45
70,000
ns
ACTIVE to ACTIVE/ACTIVE
to AUTO REFRESH com-
mand period
tRC
55
–
58.2
–
60
–
67.5
–
ns
Active to read or write de-
lay
tRCD
15
–
16.2
–
18
–
22.5
–
ns
Refresh period
tREF
–
64
–
64
–
64
–
64
ms
Average periodic refresh
interval: 64Mb, 128Mb,
and 256Mb (x32)
tREFI
–
15.6
–
15.6
–
15.6
–
15.6
μs
Average periodic refresh
interval: 256Mb, 512Mb,
1Gb, 2Gb
tREFI
–
7.8
–
7.8
–
7.8
–
7.8
μs
AUTO REFRESH command
period
tRFC
72
–
72
–
72
–
72
–
ns
2Gb: x16, x32 Mobile LPDDR SDRAM
Electrical Specifications – AC Operating Conditions
PDF: 09005aef83a73286
2gb_ddr_mobile_sdram_t69m.pdf - Rev. M 11/10 EN
36
Micron Technology, Inc. reserves the right to change products or specifications without notice.
2009 Micron Technology, Inc. All rights reserved.