W9751G8JB Datasheet, PDF (43/86 Pages) Winbond – 16M  4 BANKS  8 BIT DDR2 SDRAM

W9751G8JB
9.11 AC Characteristics
9.11.1 AC Characteristics and Operating Condition for -18 speed grade
SYM.
tRCD
tRP
tRC
tRAS
tRFC
tREFI
tCCD
tCK(avg)
tCH(avg)
tCL(avg)
tAC
tDQSCK
tDQSQ
tCKE
tRRD
tFAW
tWR
tDAL
tWTR
tRTP
SPEED GRADE
Bin(CL-tRCD-tRP)
PARAMETER
Active to Read/Write Command Delay Time
Precharge to Active Command Period
Active to Ref/Active Command Period
Active to Precharge Command Period
Auto Refresh to Active/Auto Refresh command period
Average periodic
refresh Interval
0°C ≤ TCASE ≤ 85°C
85°C < TCASE ≤ 95°C
CAS to CAS command delay
tCK(avg) @ CL=4
Average clock period
tCK(avg) @ CL=5
tCK(avg) @ CL=6
tCK(avg) @ CL=7
Average clock high pulse width
Average clock low pulse width
DQ output access time from CLK/ CLK
DQS output access time from CLK / CLK
DQS-DQ skew for DQS & associated DQ signals
CKE minimum high and low pulse width
Active to active command period for 1KB page size
Four Activate Window for 1KB page size
Write recovery time
Auto-precharge write recovery + precharge time
Internal Write to Read command delay
Internal Read to Precharge command delay
DDR2-1066 (-18)
7-7-7
MIN.
MAX.
13.125

13.125

53.125

40
70000
105


7.8

3.9
2

3.75
7.5
3
7.5
2.5
7.5
1.875
7.5
0.48
0.52
0.48
0.52
-350
350
-325
325

175
3

7.5

35
15

WR + tnRP

7.5

7.5

tIS (base) Address and control input setup time
125

tIH (base) Address and control input hold time
200

tIS (ref) Address and control input setup time
325

tIH (ref) Address and control input hold time
325

tIPW Address and control input pulse width for each input
0.6

tDQSS DQS latching rising transitions to associated clock edges
-0.25
0.25
tDSS DQS falling edge to CLK setup time
0.2

tDSH DQS falling edge hold time from CLK
0.2

tDQSH DQS input high pulse width
0.35

tDQSL DQS input low pulse width
0.35

UNIT²⁵ NOTES
nS
23
nS
23
nS
23
nS
4,23
nS
5
μS
5
μS
5,6
nCK
nS
nS
nS
nS
tCK(avg)
tCK(avg)
pS
30,31
30,31
30,31
30,31
30,31
30,31
35
pS
pS
nCK
nS
nS
nS
nCK
nS
nS
pS
pS
pS
pS
tCK(avg)
tCK(avg)
tCK(avg)
tCK(avg)
tCK(avg)
tCK(avg)
35
13
7
8,23
23
23
24
9,23
4,23
10, 26,
40,42,43
11, 26,
40,42,43
10,26,
40,42,43
11,26,
40,42,43
28
28
28
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Publication Release Date: Oct. 12, 2010
Revision A01