W9725G6IB-25 Winbond Electronics, W9725G6IB-25 Datasheet - Page 50
W9725G6IB-25
Manufacturer Part Number
W9725G6IB-25
Description
IC DDR2-800 SDRAM 256MB 84-WBGA
Manufacturer
Winbond Electronics
Datasheet
1.W9725G6IB-25.pdf
(84 pages)
Specifications of W9725G6IB-25
Format - Memory
RAM
Memory Type
DDR2 SDRAM
Memory Size
256M (16Mx16)
Speed
2.5ns
Interface
Parallel
Voltage - Supply
1.7 V ~ 1.9 V
Operating Temperature
0°C ~ 85°C
Package / Case
84-WBGA
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
W9725G6IB-25
Manufacturer:
Winbond Electronics
Quantity:
10 000
- tJIT(duty)
- tJIT(per), tJIT(per,lck)
- tJIT(cc), tJIT(cc,lck)
- tERR(2per), tERR (3per), tERR (4per), tERR (5per), tERR (6-10per) and tERR (11-50per)
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) = Min/max of {tJIT(CH), tJIT(CL)}
where,
tJIT(CH) = {tCHi- tCH(avg) where i=1 to 200}
tJIT(CL) = {tCLi- tCL(avg) where i=1 to 200}
tJIT(per) is defined as the largest deviation of any single tCK from tCK(avg).
tJIT(per) = Min/max of {tCKi- tCK(avg) where i=1 to 200}
tJIT(per) defines the single period jitter when the DLL is already locked.
tJIT(per,lck) uses the same definition for single period jitter, during the DLL locking period only.
tJIT(per) and tJIT(per,lck) are not guaranteed through final production testing.
tJIT(cc) is defined as the difference in clock period between two consecutive clock cycles:
tJIT(cc) = Max of |tCKi+1 – tCKi|
tJIT(cc) defines the cycle to cycle jitter when the DLL is already locked.
tJIT(cc,lck) uses the same definition for cycle to cycle jitter, during the DLL locking period only.
tJIT(cc) and tJIT(cc,lck) are not guaranteed through final production testing.
tERR is defined as the cumulative error across multiple consecutive cycles from tCK(avg).
Where
tERR(nper) =
⎡
⎢
⎢
⎢
⎢
⎢
⎢
⎢
⎢
⎣
11
6
≤
≤
n
n
n
n
n
n
=
=
=
=
≤
≤
3
5
2
4
⎡
⎢
⎣
50
i
10
+
∑
j
n
=
−
1
1
tCK
- 50 -
for tER
for tER
for tER
for tER
for tER
for tER
j
⎤
⎥
⎦
–n × tCK(avg)
R(3per)
R(11
R(5per)
R(2per)
R(4per)
R(6
–
Publication Release Date: Oct. 23, 2009
–
10per)
50per)
W9725G6IB
Revision A04