64Mb: x32 SDRAM
Electrical Specifications – AC Operating Conditions
Electrical Specifications – AC Operating Conditions
Table 12: Electrical Characteristics and Recommended AC Operating Conditions
Notes 1–5 apply to all parameters and conditions; V
DD
, V
DDQ
= 3.3V ±0.3V
-5
-55
-6A
Parameter
Access time from CLK CL = 3
(positive edge)
CL = 2
CL = 1
Address hold time
Address setup time
CLK high-level width
CLK low-level width
Clock cycle time
CL = 3
CL = 2
CL = 1
CKE hold time
CKE setup time
CS#, RAS#, CAS#, WE#, DQM
hold time
CS#, RAS#, CAS#, WE#, DQM
setup time
Data-in hold time
Data-in setup time
Data-out High-Z time CL = 3
CL = 2
CL = 1
Data-out Low-Z time
Data-out hold time
ACTIVE-to-PRECHARGE com-
mand
ACTIVE-to-ACTIVE command
period
AUTO REFRESH period
ACTIVE-to-READ or WRITE
delay
Refresh period (4096 rows)
Refresh period – automotive
(4096 rows)
PRECHARGE command peri-
od
ACTIVE bank
a
to ACTIVE
bank
b
command
PDF: 09005aef811ce1fe
64mb_x32_sdram.pdf - Rev. T 04/13 EN
-6
Min
–
–
–
1
1.5
2.5
2.5
6
10
20
1
1.5
1
1.5
1
1.5
–
–
–
1
2
42
60
60
18
–
–
18
12
Max
5.5
7.5
17
–
–
–
–
–
–
–
–
–
–
–
–
–
5.5
7.5
17
–
–
120k
–
–
–
64
16
–
–
Min
–
–
–
1
2
2.75
2.75
7
10
20
1
2
1
2
1
2
–
–
–
1
2.5
42
70
70
20
–
–
20
14
-7
Max
5.5
8
17
–
–
–
–
–
–
–
–
–
–
–
–
–
5.5
8
17
–
–
120k
–
–
–
64
16
–
–
Unit Notes
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ms
ms
ns
ns
Symbol Min
t
AC(3)
t
AC(2)
t
AC(1)
t
AH
t
AS
t
CH
t
CL
t
CK(3)
t
CK(2)
t
CK(1)
t
CKH
t
CKS
t
CMH
t
CMS
t
DH
t
DS
t
HZ(3)
t
HZ(2)
t
HZ(1)
t
LZ
t
OH
t
RAS
t
RC
t
RFC
t
RCD
t
REF
t
REF
AT
Max
4.5
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
120k
–
–
–
64
16
–
–
Min
–
–
–
1
1.5
2
2
5.5
–
–
1
1.5
1
1.5
1
1.5
5
–
–
1
2
38.7
55
60
16.5
–
–
16.5
11
Max
5
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
120k
–
–
–
64
16
–
–
Min
–
–
–
0.8
1.5
2.5
2.5
6
10
20
0.8
1.5
0.8
1.5
0.8
1.5
–
–
–
1
3
42
60
60
18
–
–
18
12
Max
5.4
7.5
17
–
–
–
–
–
–
–
–
–
–
–
–
–
5.4
7.5
17
–
–
120k
–
–
–
64
16
–
–
–
–
–
1
1.5
2
2
5
–
–
1
1.5
1
1.5
1
1.5
4.5
–
–
1
1.5
38.7
55
60
15
–
–
15
10
t
RP
t
RRD
21
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1999 Micron Technology, Inc. All rights reserved.
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