MT40A256M16GE-075E Datasheet, PDF (339/365 Pages) Micron Technology – Temperature controlled refresh (TCR)

Electrical Characteristics and AC Timing Parameters
Table 157: Electrical Characteristics and AC Timing Parameters: DDR4-1600 through DDR4-2400
Parameter
Clock period average (DLL off mode)
Clock period average
High pulse width average
Low pulse width average
Clock period jitter
Clock absolute period
Total
Deterministic
DLL locking
Clock absolute high pulse width
(includes duty cycle jitter)
Clock absolute low pulse width
(includes duty cycle jitter)
Cycle-to-cycle jitter
Total
DLL locking
Symbol
t_{CK (DLL_OFF)}
t_{CK (AVG,}
DLL_ON)
t_{CH (AVG)}
t_{CL (AVG)}
t_{JITper_tot}
t_{JITper_dj}
t_JITper,lck
t_{CK (ABS)}
t_{CH (ABS)}
t_{CL (ABS)}
t_{JITcc _tot}
t_JITcc,lck
DDR4-1600 DDR4-1866
Min Max Min Max
Clock Timing
8
20
8
20
1.25 1.9 1.071 1.9
DDR4-2133
Min Max
8
20
0.937 1.9
DDR4-2400
Min Max
8
20
0.833 1.9
0.48 0.52 0.48 0.52 0.48 0.52 0.48 0.52
0.48 0.52 0.48 0.52 0.48 0.52 0.48 0.52
–63
63
–54
54
–47
47
–42
42
–31
31
–27
27
–23
23
–21
21
–50
50
–43
43
–38
38
-33
33
MIN = ^tCK (AVG) MIN + ^tJITper_tot MIN; MAX = ^tCK (AVG) MAX +
t_{JITper_tot MAX}
0.45
–
0.45
–
0.45
–
0.45
–
0.45
–
0.45
–
0.45
–
0.45
–
–
125
–
107
–
94
–
83
–
100
–
86
–
75
–
67
Unit Notes
ns
ns
14
t_CK
(AVG)
t_CK
(AVG)
ps
ps
ps
ps
18 , 19
18
t_CK
(AVG)
t_CK
(AVG)
ps
ps