W9725G6KB25I-TR Datasheet, PDF (43/87 Pages) Winbond – 4M X 4 BANKS X 16 BIT DDR2 SDRAM

W9725G6KB
10.11 AC Characteristics
10.11.1 AC Characteristics and Operating Condition for -18 speed grade
Notes: 1-3 and 45-47 apply to the entire table
SYM.
tRCD
tRP
tRC
tRAS
tRFC
tREFI
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
DDR2-1066 (-18)
7-7-7
MIN.
MAX.
13.125

13.125

58.125

45
70000
75


7.8

3.9
tCCD
tCK(avg)
tCH(avg)
tCL(avg)
tAC
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
2
3.75
3
2.5
1.875
0.48
0.48
-350

7.5
7.5
7.5
7.5
0.52
0.52
350
tDQSCK _{DQS output access time from CLK / CLK}
-325
325
tDQSQ DQS-DQ skew for DQS & associated DQ signals

175
tCKE CKE minimum high and low pulse width
3

tRRD Active to active command period for 1KB page size
7.5

tFAW Four Activate Window for 1KB page size
35
tWR
Write recovery time
15

tDAL Auto-precharge write recovery + precharge time
WR + tnRP

tWTR Internal Write to Read command delay
7.5

tRTP Internal Read to Precharge command delay
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: Sep. 03, 2012
Revision A03