K4H281638B-TCB0000 Samsung Semiconductor, K4H281638B-TCB0000 Datasheet - Page 49

• Manufacturer Part Number: K4H281638B-TCB0000
• Manufacturer: Samsung Semiconductor

Specifications of K4H281638B-TCB0000

• Lead Free Status / Rohs Status: Supplier Unconfirmed

128Mb DDR SDRAM
1. Maximum burst refresh of 8
2. The specific requirement is that DQS be valid(High or Low) on or before this CK edge. The case shown(DQS going from
3. The maximum limit for this parameter is not a device limit. The device will operate with a great value for this parameter,
4. A write command can be applied with t
5. For registered DINNs, t
Output Slew Rate Matching Ratio
(rise to fall)
Mode register set cycle time
DQ & DM setup time to DQS
DQ & DM hold time to DQS
DQ & DM input pulse width
Power down exit time
Exit self refresh to write command
Exit self refresh to bank active command
Exit self refresh to read command
Refresh interval time
Output DQS valid window
Clock half period
Data hold skew factor
DQS write postamble time
but system performance (bus turnaround) will degrade accordingly.
jitter due to crosstalk (t
High_Z to logic Low) applies when no writes were previously in progress on the bus. If a previous write was in progress,
DQS could be High at this time, depending on tDQSS.
Parameter
CL
64Mb, 128Mb
256Mb
JIT
(crosstalk)
and t
Table 16. AC timing parameters and specifications
CH
are
) on the DIMM.
RCD
45% of the period including both the half period jitter (t
Symbol
tPDEX
tWPST
tDIPW
t
tMRD
tXSW
tQHS
satisfied after this command.
tXSA
tXSR
tREF
SLMR
tDH
tQH
tDS
tHP
or tCHmin
-TCA2(DDR266A)
tHPmin
tCLmin
-tQHS
0.67
1.75
15.6
Min
200
0.5
0.5
7.5
7.8
0.4
15
95
75
- 49 -
Max
0.75
1.5
0.6
-
-
or tCHmin
-TCB0(DDR266B)
tHPmin
tCLmin
-tQHS
0.67
1.75
15.6
Min
200
0.5
0.5
7.5
7.8
0.4
15
75
Max
0.75
1.5
0.6
-
-
REV. 1.31 Nov. 3. 2001
JIT(HP)
or tCHmin
tHPmin
-TCA0 (DDR200)
tCLmin
-tQHS
0.67
15.6
Min
116
200
0.6
0.6
7.8
0.4
) of the PLL and the half period
16
10
80
2
Max
1.5
0.8
0.6
-
-
Cycle
Unit
tCK
ns
ns
ns
ns
ns
ns
ns
us
us
ns
ns
ns
Note
7,8,9
7,8,9
4
1
1
5
3