W972GG8JB-3-TR Datasheet, PDF (43/87 Pages) Winbond – 32M 8 BANKS 8 BIT DDR2 SDRAM

W972GG8JB
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
195


7.8

3.9
tCCD
CAS to CAS command delay
2

tCK(avg)
tCH(avg)
tCL(avg)
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
3.75
3
2.5
1.875
0.48
0.48
7.5
7.5
7.5
7.5
0.52
0.52
tAC
DQ output access time from CLK/ CLK
-350
350
tDQSCK _{DQS output access time from CLK / CLK}
-325
325
tDQSQ
tCKE
DQS-DQ skew for DQS & associated DQ signals
CKE minimum high and low pulse width

175
3

tRRD Active to active command period for 1KB page size
7.5

tFAW Four Activate Window for 1KB page size
35
tWR
tDAL
Write recovery time
Auto-precharge write recovery + precharge time
15

WR + tnRP

tWTR
tRTP
Internal Write to Read command delay
Internal Read to Precharge command delay
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
nS
nS
nS
nS
μS
μS
nCK
nS
nS
nS
nS
tCK(avg)
tCK(avg)
pS
23
23
23
4,23
5
5
5,6
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
- 43 -
Publication Release Date: Dec. 03, 2012
Revision A03