W9751G6IB-25 Winbond Electronics, W9751G6IB-25 Datasheet - Page 51

• Manufacturer Part Number: W9751G6IB-25
• Description: IC DDR2-800 SDRAM 512MB 84-WBGA
• Manufacturer: Winbond Electronics

Specifications of W9751G6IB-25

• Format - Memory: RAM
• Memory Type: DDR2 SDRAM
• Memory Size: 512M (32Mx16)
• 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

Clock period jitter
Clock period jitter during DLL locking period
Cycle to cycle clock period
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,
n = 6 ... 10, inclusive
Cumulative error across n cycles,
n = 11 ... 50, inclusive
Duty cycle jitter
30. Input clock jitter spec parameter. These parameters and the ones in the table below are referred to as 'input clock jitter spec
Input clock-Jitter specifications parameters for DDR2-667 and DDR2-800
Definitions:
- tCK(avg)
- tCH(avg) and tCL(avg)
parameters'. The jitter specified is a random jitter meeting a Gaussian distribution.
tCK(avg) is calculated as the average clock period across any consecutive 200 cycle window.
tCH(avg) is defined as the average HIGH pulse width, as calculated across any consecutive 200 HIGH pulses.
tCL(avg) is defined as the average LOW pulse width, as calculated across any consecutive 200 LOW pulses.
PARAMETER
tCH(avg) =
tCL(avg) =
tCK(avg) =
tERR(10-50per)
tERR(6-10per)
tJIT(per,lck)
where
where
where
tERR(2per)
tERR(3per)
tERR(4per)
tERR(5per)
tJIT(cc,lck)
SYMBOL
tJIT(duty)
tJIT(per)
tJIT(cc)
⎡
⎢
⎣
⎡
⎢
⎣
∑
∑
j
j
N
N
=
=
1
1
tCH
tCL
- 51 -
⎡
⎢
⎣
∑
j
j
j
N
⎤
⎥
⎦
=
⎤
⎥
⎦
N = 200
N = 200
N = 200
1
/ (N × tCK(avg))
tCK
/ (N × tCK(avg))
MIN.
-125
-100
-250
-200
-175
-225
-250
-250
-350
-125
-450
DDR2-667
j
⎤
⎥
⎦
/ N
MAX.
Publication Release Date: Oct. 23, 2009
125
100
250
200
175
225
250
250
350
450
125
MIN.
-100
-200
-160
-150
-175
-200
-200
-300
-450
-100
-80
DDR2-800
W9751G6IB
MAX.
100
200
160
150
175
200
200
300
450
100
80
Revision A06
UNIT
pS
pS
pS
pS
pS
pS
pS
pS
pS
pS
pS