AC Timing Operating Specifications
Table 11: AC Operating Specifications and Conditions
Not all speed grades listed may be supported for this device; refer to the title page for speeds supported; Notes: 1–5 apply to the entire table;
VDDQ = +1.8V ±0.1V, VDD = +1.8V ±0.1V
AC Characteristics
Parameter Symbol Min
Clock
cycle time
-187E
-25E
-25
-3E
-3
-37E
-5E
Max Min Max Min Max Min Max Min Max Min Max Min Max Units Notes
CL = 7 tCK (avg) 1.875
CL = 6 tCK (avg) 2.5
CL = 5 tCK (avg) 3.0
CL = 4 tCK (avg) 3.75
8.0
8.0
ns
6, 7, 8,
9
–
–
–
–
–
–
–
–
3.0
3.75
5.0
–
–
–
–
–
–
–
–
–
2.5
2.5
3.75
5.0
8.0
8.0
8.0
8.0
2.5
3.0
3.75
5.0
8.0
8.0
8.0
8.0
–
–
–
8.0
3.0
3.0
5.0
8.0
8.0
8.0
8.0
8.0
8.0
–
–
8.0
–
–
8.0
8.0
3.75
5.0
CL = 3 tCK (avg) 5.0
8.0
5.0
8.0
5.0
8.0
t
CK high-level width CH (avg) 0.48
CK low-level width tCL (avg) 0.48
0.52
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 tCK
0.48 0.52 0.48 0.52 0.48 0.52 0.48 0.52 0.48 0.52 0.48 0.52 tCK
10
11
Half clock period
tHP
MIN = lesser of tCH and tCL
MAX = n/a
ps
ps
ps
ps
Absolute tCK
tCK (abs)
tCH (abs)
tCL (abs)
MIN = tCK (AVG) MIN + tJITper (MIN)
MAX = tCK (AVG) MAX + tJITper (MAX)
Absolute CK
high-level width
MIN = tCK (AVG) MIN × tCH (AVG) MIN + tJITdty (MIN)
MAX = tCK (AVG) MAX × tCH (AVG) MAX + tJITdty (MAX)
Absolute CK
low-level width
MIN = tCK (AVG) MIN × tCL (AVG) MIN + tJITdty (MIN)
MAX = tCK (AVG) MAX × tCL (AVG) MAX + tJITdty (MAX)
Period jitter
Half period
Cycle to cycle
tJITper
tJITdty
tJITcc
tERR2per –132
tERR3per –157
tERR4per –175
tERR5per –188
–90
–75
90
75
–100 100 –100 100 –125 125 –125 125 –125 125 –125 125
–100 100 –100 100 –125 125 –125 125 –125 125 –150 150
ps
ps
ps
ps
12
13
14
15
180
200
200
250
250
250
250
Cumulative error,
2 cycles
132
157
175
188
250
425
–150 150 –150 150 –175 175 –175 175 –175 175 –175 175
–175 175 –175 175 –225 225 –225 225 –225 225 –225 225
–200 200 –200 200 –250 250 –250 250 –250 250 –250 250
–200 200 –200 200 –250 250 –250 250 –250 250 –250 250
–300 300 –300 300 –350 350 –350 350 –350 350 –350 350
–450 450 –450 450 –450 450 –450 450 –450 450 –450 450
Cumulative error,
3 cycles
ps
ps
ps
ps
ps
15
15
Cumulative error,
4 cycles
Cumulative error,
5 cycles
15, 16
15, 16
15
Cumulative error,
6–10 cycles
tERR6–
10per
tERR11–
50per
–250
–425
Cumulative error,
11–50 cycles
MICRON [ MICRON TECHNOLOGY ]
