EDJ1104BFSE Datasheet, PDF (61/147 Pages) Elpida Memory – 1G bits DDR3 SDRAM

EDJ1104BFSE, EDJ1108BFSE
Clock Jitter [DDR3-1066]
-AE
Data rate (Mbps)
1066
Parameter
Symbol
min.
max.
Unit Notes
Average clock period
Absolute clock period
Clock period jitter
Clock period jitter during
DLL locking period
Cycle to cycle period jitter
Cycle to cycle clock period jitter
during DLL locking period
Cumulative error across 2 cycles
tCK (avg)
tCK (abs)
tJIT (per)
1875
tCK(avg)min +
tJIT(per)min
−90
tJIT (per, lck) −80
tJIT (cc)

tJIT (cc, lck) 
tERR (2per) −132
3333
tCK(avg)max+
tJIT(per)max
90
80
180
160
132
ps 1
ps 2
ps 6
ps 6
ps 7
ps 7
ps 8
Cumulative error across 3 cycles tERR (3per) −157
157
ps 8
Cumulative error across 4 cycles tERR (4per) −175
175
ps 8
Cumulative error across 5 cycles tERR (5per) −188
188
ps 8
Cumulative error across 6 cycles tERR (6per) −200
200
ps 8
Cumulative error across 7 cycles tERR (7per) −209
209
ps 8
Cumulative error across 8 cycles tERR (8per) −217
217
ps 8
Cumulative error across 9 cycles tERR (9per) −224
224
ps 8
Cumulative error across 10 cycles tERR (10per) −231
231
ps 8
Cumulative error across 11 cycles tERR (11per) −237
237
ps 8
Cumulative error across 12 cycles tERR (12per) −242
242
Cumulative error across
n=13, 14…49,50 cycles
tERR (nper)
tERR (nper) min. = (1+0.68in(n)) x tJIT(per) min
tERR (nper) max. = (1+0.68in(n)) x tJIT(per) max
Average high pulse width
tCH (avg)
0.47
0.53
Average low pulse width
tCL (avg)
0.47
0.53
Absolute clock high pulse width tCH (abs)
0.43

Absolute clock low pulse width
tCL (abs)
0.43

Duty cycle jitter
tJIT (duty) 

ps 8
ps 9
tCK
(avg)
tCK
(avg)
tCK
(avg)
tCK
(avg)
ps
3
4
10, 11
10, 12
5
Notes: 1. tCK (avg) is calculated as the average clock period across any consecutive 200cycle window, where each
clock period is calculated from rising edge to rising edge.
N
Σ ^tCKj
N
j=1
N = 200
2. tCK (abs) is the absolute clock period, as measured from one rising edge to the next consecutive rising
edge. tCK (abs) is not subject to production test.
3. tCH (avg) is defined as the average high pulse width, as calculated across any consecutive 200 high
pulses.
N
Σ ^tCHj
j=1
N = 200
(N × tCK(avg))
Preliminary Data Sheet E1653E20 (Ver. 2.0)
61