ESMT
M14D5121632A (2H)
Operation Temperature Condition (TC) -40°C~95°C
Clock Jitter [ DDR2- 1066, 800, 667 ]
-1.8
-2.5
-3
Parameter
Symbol
Unit
Note
Min.
1875
-90
Max.
7500
90
Min.
2500
-100
Max.
8000
100
Min.
3000
-125
Max.
8000
125
Average clock period
tCK (avg)
tJIT (per)
ps
ps
1
5
Clock period jitter
Clock period jitter during
DLL locking period
t
JIT (per,lck)
tJIT (cc)
JIT (cc, lck)
-80
80
-80
80
-100
-250
-200
100
250
200
ps
ps
ps
5
6
6
Cycle to cycle period jitter
Cycle to cycle clock period jitter
During DLL locking period
-180
-160
180
160
-200
-160
200
160
t
Cumulative error across 2 cycles tERR (2per)
Cumulative error across 3 cycles tERR (3per)
Cumulative error across 4 cycles tERR (4per)
Cumulative error across 5 cycles tERR (5per)
Cumulative error across
-132
-157
-175
-188
132
157
175
188
-150
-175
-200
-200
150
175
200
200
-175
-225
-250
-250
175
225
250
250
ps
ps
ps
ps
7
7
7
7
t
ERR (6-10per)
-250
-425
250
425
-300
-450
300
450
-350
-450
350
450
ps
ps
7
7
n=6,7,8,9,10 cycles
Cumulative error across
n=11,12,….49,50 cycles
Average high pulse width
Average low pulse width
Duty cycle jitter
t
ERR (11-50per)
tCH (avg)
tCL (avg)
tJIT (duty)
0.48
0.48
-75
0.52
0.52
75
0.48
0.48
-100
0.52
0.52
100
0.48
0.48
-125
0.52
0.52
125
t
t
CK (avg)
CK (avg)
ps
2
3
4
Note:
1.
tCK (avg) is calculated as the average clock period across any consecutive 200 cycle window.
2. tCH (avg) is defined as the average HIGH pulse width, as calculated across any consecutive 200 HIGH pulses.
3. tCL (avg) is defined as the average LOW pulse width, as calculated across any consecutive 200 LOW pulses.
4. tJIT (duty) is defined as the cumulative set of tCH jitter and tCL jitter. tCH jitter is the largest deviation of any single tCH from tCH
(avg). tCL jitter is the largest deviation of any single tCL from tCL (avg).
tJIT (duty) is not subject to production test.
t
t
t
JIT (duty) = Min./Max. of { tJIT (CH), tJIT (CL)}, where:
JIT (CH) = { tCH j - tCH (avg) where j =1 to 200}
JIT (CL) = {tCL j - tCL (avg) where j =1 to 200}
5.
t
t
t
t
t
JIT (per) is defined as the largest deviation of any single tCK from tCK (avg).
JIT (per) = Min./Max. of { tCK j - tCK (avg) where j =1 to 200}
JIT (per) defines the single period jitter when the DLL is already locked.
JIT (per, lck) uses the same definition for single period jitter, during the DLL locking period only.
JIT (per) and tJIT (per, lck) are not subject to production testing.
Elite Semiconductor Memory Technology Inc.
Publication Date : Aug. 2011
Revision : 1.1 19/62
ESMT [ ELITE SEMICONDUCTOR MEMORY TECHNOLOGY INC. ]
