HYB18T512400BF-2.5 QIMONDA [Qimonda AG], HYB18T512400BF-2.5 Datasheet - Page 57

• Manufacturer Part Number: HYB18T512400BF-2.5
• Description: 512-Mbit Double-Data-Rate-Two SDRAM
• Manufacturer: QIMONDA [Qimonda AG]

Rev. 1.1, 2007-05
03292006-YBYM-WG0Z
Symbol
t
t
t
t
ERR.nPER
CH.AVG
CL.AVG
JIT.DUTY
Parameter
Cumulative error
across n cycles
Average high-pulse
width
Average low-pulse
width
Duty-cycle jitter
Description
t
from
where, i = 1 to 200 and
n = 3 for
n = 4 for
n = 5 for
6 ≤ n ≤ 10 for
11 ≤ n ≤ 50 for
t
any consecutive 200 high pulses:
N = 200
t
consecutive 200 low pulses:
N = 200
t
t
t
t
t
tERR nper
tCH avg
tCL avg
ERR.2PER
CH.AVG
CL.AVG
JIT.DUTY
JIT.CH
JIT.CL
JIT.CH
JIT.CL
t
CK.AVG
is the largest deviation of any single
= {
(
is the largest deviation of any single
= {
(
is defined as the average low-pulse width, as calculated across any
is defined as the average high-pulse width, as calculated across
(
= Min/Max of {
t
t
t
t
t
is defined as the cumulative error across n consecutive cycles
CLi
CHi
ERR.3PER
ERR.4PER
ERR.5PER
:
)
-
)
-
t
t
t
ERR.6-10PER
CL.AVG
=
CH.AVG
)
t
=
ERR.11-50PER
=
--------------------------------------- - .
(
---------------------------------------- .
(
57
N tCK avg
N tCK avg
×
⎛
⎜
⎜
⎝
×
×
i
×
t
t
CK.AVG
JIT.CH
t
+
CK.AVG
j
∑
n 1
=
–
i
1
1
,
} where i=1 to 200
} where i=1 to 200
tCK
(
t
(
JIT.CL
}, where:
j
512-Mbit Double-Data-Rate-Two SDRAM
⎞
⎟
⎟
⎠
)
)
)
)
–
⎛
⎜
⎜
⎝
⎛
⎜
⎜
⎝
n
j
j
∑
∑
=
N
t
=
t
×
N
CL
CH
1
1
tCK avg
tCL
from
tCH
from
HYB18T512[40/80/16]0B[C/F]
(
t
j
t
⎞
⎟
⎟
⎠
j
CL.AVG
CH.AVG
⎞
⎟
⎟
⎠
)
Internet Data Sheet
(3)
(4)
(5)
Units
ps
t
t
ps
CK.AVG
CK.AVG