64Mb : x4, x8, x16
SDRAM
CAPACITANCE
(Note: 2; notes appear on page 35)
PARAMETER
SYMBOL M IN M AX UNITS NOTES
Input Capacitance: CLK
CI1
CI2
CIO
2.5
2.5
4.0
3.5
3.8
6.0
pF
pF
pF
29
30
31
Input Capacitance: All other input-only pins
Input/Output Capacitance: DQs
ELECTRICAL CHARACTERISTICS AND RECOMMENDED AC OPERATING CONDITIONS
(Notes: 5, 6, 8, 9, 11; notes appear on page 35); VDD, VDDQ = +3.3V ±0.3V
ACCHARACTERISTICS
PARAMETER
-6
-7E
MAX MIN
-75
MAX
-8E
MIN
SYMBOL MIN
MAX
5.5
–
MIN
MAX UNITS NOTES
t
Access time from CLK (pos. edge)
CL = 3
CL = 2
AC(3)
5.4
5.4
5.4
6
6
6
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
27
t
AC(2)
t
Address hold time
Address setup time
CLKhigh-levelwidth
CLK low-level width
Clock cycle time
AH
1
1.5
2.5
2.5
6
0.8
1.5
2.5
2.5
7
0.8
1.5
2.5
2.5
7.5
10
1
2
t
AS
CH
t
3
t
CL
3
t
t
CL = 3
CL = 2
CK(3)
CK(2)
8
23
23
–
7.5
0.8
1.5
0.8
1.5
0.8
1.5
10
1
t
CKE hold time
CKE setup time
CKH
1
0.8
1.5
0.8
1.5
0.8
1.5
t
CKS
1.5
1
2
t
CS#, RAS#, CAS#, WE#, DQM hold time
CS#, RAS#, CAS#, WE#, DQM setup time
Data-in hold time
CMH
1
t
CMS
1.5
1
2
t
DH
1
t
Data-in setup time
DS
1.5
2
t
t
Data-out high-impedance time
CL = 3
CL = 2
HZ(3)
HZ(2)
5.5
–
5.4
5.4
5.4
6
6
6
10
10
t
Data-out low-impedance time
Data-out hold time (load)
LZ
1
2
1
3
1
3
1
3
t
OH
t
Data-out hold time (no load)
ACTIVEto PRECHARGEcommand
ACTIVEto ACTIVEcommand period
ACTIVE to READ or WRITE delay
Refresh period (4,096 rows)
AUTO REFRESHperiod
OH
1.8
42
60
18
1.8
37
60
15
1.8
1.8
50
70
20
28
N
t
RAS
120,000
64
120,000 44
120,000
64
120,000 ns
t
RC
66
ns
ns
t
RCD
20
t
REF
RFC
64
66
20
15
64
ms
ns
ns
ns
ns
–
t
60
18
66
15
70
20
t
PRECHARGEcommand period
RP
t
ACTIVE bank a to ACTIVE bank b command
Transition time
RRD
12
14
20
t
T
0.3
1.2
0.3
1.2
0.3
1.2
0.3
1.2
7
t
WRITE recovery time
WR
1 CLK +
6ns
1 CLK +
7ns
1 CLK +
7.5ns
15
1 CLK +
7ns
24
12
14
15
ns
ns
25
20
t
Exit SELF REFRESH to ACTIVE command
XSR
70
67
75
80
64Mb: x4, x8, x16 SDRAM
64MSDRAM_F.p65 – Rev. F; Pub. 1/03
Micron Technology, Inc., reservesthe right to change productsor specificationswithout notice.
©2003, Micron Technology, Inc.
33
MICRON [ MICRON TECHNOLOGY ]
