MT48LC16M16A2TG-75ITD Datasheet, PDF (28/86 Pages) Micron Technology – 256Mb: x4, x8, x16 SDRAM

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Electrical Specifications – AC Operating Conditions
Table 12: Electrical Characteristics and Recommended AC Operating Conditions (Continued)
Notes 1–5 apply to all parameters and conditions
Parameter
Symbol
Exit SELF REFRESH-to-ACTIVE command
t_XSR
-6A
Min Max
67
–
-7E
Min Max
67
–
-75
Min Max
75
–
Unit Notes
ns
15
Table 13: AC Functional Characteristics
Notes 2–5 apply to all parameters and conditions
Parameter
Symbol -6A -7E -75 Unit Notes
Last data-in to burst STOP command
t_BDL
1
1
1
t_CK
16
READ/WRITE command to READ/WRITE command
t_CCD
1
1
1
t_CK
16
Last data-in to new READ/WRITE command
t_CDL
1
1
1
t_CK
16
CKE to clock disable or power-down entry mode
t_CKED
1
1
t_CK
17
Data-in to ACTIVE command
t_DAL
5
4
5
t_{CK 18, 19}
Data-in to PRECHARGE command
t_DPL
2
2
2
t_{CK 19, 20}
DQM to input data delay
t_DQD
0
0
0
t_CK
16
DQM to data mask during WRITEs
t_DQM
0
0
0
t_CK
16
DQM to data High-Z during READs
t_DQZ
2
2
2
t_CK
16
WRITE command to input data delay
t_DWD
0
0
0
t_CK
16
LOAD MODE REGISTER command to ACTIVE or REFRESH command
t_MRD
2
2
2
t_CK
21
CKE to clock enable or power-down exit setup mode
t_PED
1
1
1
t_CK
17
Last data-in to PRECHARGE command
t_RDL
2
2
2
t_{CK 19, 20}
Data-out High-Z from PRECHARGE command CL = 3
t_ROH(3)
3
3
3
t_CK
16
CL = 2
t_ROH(2)
2
2
2
t_CK
16
CL = 1
t_ROH(1)
1
–
–
t_CK
16
Notes:
1. Minimum specifications are used only to indicate the cycle time at which proper opera-
tion over the full temperature range is ensured:
0˚C ≤ T_A ≤ +70˚C (commercial)
-40˚C ≤ T_A ≤ +85˚C (industrial)
-40˚C ≤ T_A ≤ +105˚C (automotive)
2. An initial pause of 100μs is required after power-up, followed by two AUTO REFRESH
commands, before proper device operation is ensured. (V_DD and V_DDQ must be powered
up simultaneously. V_SS and V_SSQ must be at same potential.) The two AUTO REFRESH
command wake-ups should be repeated any time the ^tREF refresh requirement is excee-
ded.
3. In addition to meeting the transition rate specification, the clock and CKE must transit
between V_IH and V_IL (or between V_IL and V_IH) in a monotonic manner.
4. Outputs measured at 1.5V with equivalent load:
Q
50pF
5. AC operating and I_DD test conditions have V_IL = 0V and V_IH = 3.0V using a measurement
reference level of 1.5V. If the input transition time is longer than 1ns, then the timing is
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