HYB18T512400BF-2.5 QIMONDA [Qimonda AG], HYB18T512400BF-2.5 Datasheet - Page 58

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

The following parameters are specified per their average values however, it is understood that the following relationship
between the average timing and the absolute instantaneous timing holds all the time.
Example: for DDR2-667, tCH.ABS(Min) = (0.48 x 3000ps) – 125 ps = 1315 ps = 0.438 x 3000 ps.
Table 53
Rev. 1.1, 2007-05
03292006-YBYM-WG0Z
Symbol
t
t
t
Symbol
t
t
t
t
t
t
t
t
t
t
t
t
t
t
CK.ABS
CH.ABS
CL.ABS
CK.AVG
JIT.PER
JIT(PER,LCK)
JIT.CC
JIT(CC,LCK)
ERR.2PER
ERR.3PER
ERR.4PER
ERR.5PER
ERR(6-10PER)
ERR(11-50PER)
CH.AVG
CL.AVG
JIT.DUTY
shows clock-jitter specifications.
Parameter
Clock period
Clock high-pulse width
Clock low-pulse width
Parameter
Average clock period nominal w/o jitter
Clock-period jitter
Clock-period jitter during DLL locking period
Cycle-to-cycle clock-period jitter
Cycle-to-cycle clock-period jitter during DLL-
locking period
Cumulative error across 2 cycles
Cumulative error across 3 cycles
Cumulative error across 4 cycles
Cumulative error across 5 cycles
Cumulative error across n cycles with n = 6 ..
10, inclusive
Cumulative error across n cycles with n = 11 ..
50, inclusive
Average high-pulse width
Average low-pulse width
Duty-cycle jitter
Min.
t
t
t
CK.AVG(Min)
CH.AVG(Min)
CL.AVG(Min)
x
+
x
t
t
t
CK.AVG(Min)
JIT.PER(Min)
CK.AVG(Min)
58
+
+
t
t
JIT.DUTY(Min)
JIT.DUTY(Min)
3000
–125
–100
–250
–175
–225
–250
–250
0.48
0.48
–125
DDR2 -667
–200
–350
–450
Min.
Clock-Jitter Specifications for –667 and –800
Max.
t
t
t
t
t
CK.AVG(Max)
CH.AVG(Max)
JIT.DUTY(Max)
CL.AVG(Max)
JIT.DUTY(Max)
512-Mbit Double-Data-Rate-Two SDRAM
Max.
8000
+125
+100
+250
+200
+175
+225
+250
+250
+350
+450
0.52
0.52
+125
Absolute Jitter Value Definitions
+
x
x
t
t
t
JIT.PER(Max)
CK.AVG(Max)
CK.AVG(Max)
DDR2 -800
Min.
2500
–100
–80
–200
–160
–150
–175
–200
–200
–300
–450
0.48
0.48
–100
HYB18T512[40/80/16]0B[C/F]
+
+
Max.
8000
+100
+80
+200
+160
+150
+175
+200
+200
+300
+450
0.52
0.52
+100
Internet Data Sheet
TABLE 52
TABLE 53
Unit
ps
ps
ps
ps
ps
ps
ps
ps
ps
ps
ps
t
t
ps
Unit
ps
ps
ps
CK.AVG
CK.AVG