k4t1g084qq Samsung Semiconductor, Inc., k4t1g084qq Datasheet - Page 20

• Manufacturer Part Number: k4t1g084qq
• Description: 1gb Q-die Ddr2 Sdram Specification
• Manufacturer: Samsung Semiconductor, Inc.

K4T1G084QQ
K4T1G164QQ
13.3 Timing Parameters by Speed Grade
(Refer to notes for informations related to this table at the bottom)
K4T1G044QQ
DQ output access time from CK/CK
DQS output access time from CK/CK
CK high-level width
CK low-level width
CK half period
Clock cycle time, CL=x
DQ and DM input hold time
DQ and DM input setup time
Control & Address input pulse width for each input
DQ and DM input pulse width for each input
Data-out high-impedance time from CK/CK
DQS low-impedance time from CK/CK
DQ low-impedance time from CK/CK
DQS-DQ skew for DQS and associated DQ signals
DQ hold skew factor
DQ/DQS output hold time from DQS
First DQS latching transition to associated clock edge
DQS input high pulse width
DQS input low pulse width
DQS falling edge to CK setup time
DQS falling edge hold time from CK
Mode register set command cycle time
Write postamble
Write preamble
Address and control input hold time
Address and control input setup time
Read preamble
Read postamble
Active to active command period for 1KB page size products tRRD
Parameter
tAC
tDQSCK
tCH
tCL
tHP
tCK
tDH(base)
tDS(base)
tIPW
tDIPW
tHZ
tLZ(DQS)
tLZ(DQ)
tDQSQ
tQHS
tQH
tDQSS
tDQSH
tDQSL
tDSS
tDSH
tMRD
tWPST
tWPRE
tIH(base)
tIS(base)
tRPRE
tRPST
Symbol
20 of 44
min(tCL,tCH)
tHP - tQHS
2* tAC min
tAC min
- 0.25
2500
- 400
- 350
0.45
0.45
0.35
0.35
min
125
0.35
250
175
0.2
0.2
0.4
0.35
0.9
0.4
7.5
50
0.6
2
x
x
x
DDR2-800
tAC max
tAC max
tAC max
8000
max
0.55
0.55
0.25
200
300
400
350
0.6
1.1
0.6
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
min(tCL, tCH)
tHP - tQHS
2*tAC min
tAC min
-0.25
3000
-400
0.45
0.45
0.35
0.35
0.35
min
-450
175
100
0.35
275
200
0.6
0.2
0.2
0.4
0.9
0.4
7.5
2
x
x
x
DDR2-667
Rev. 1.03 February 2008
tAC max
tAC max
tAC max
+400
8000
max
0.55
0.55
0.25
+450
240
340
0.6
1.1
0.6
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
DDR2 SDRAM
Units
tCK
tCK
tCK
tCK
tCK
tCK
tCK
tCK
tCK
tCK
tCK
tCK
tCK
tCK
ps
ps
ps
ps
ps
ps
ps
ps
ps
ps
ps
ps
ps
ps
ns
6,7,8,21,28,31
6,7,8,20,28,31
5,7,9,23,29
5,7,9,22,29
Notes
35,36
35,36
35,36
18,40
18,40
18,40
19,41
19,42
4,32
40
40
37
13
38
39
30
30
30
10