HYMP164U64CP6-C4 Datasheet, PDF (22/29 Pages) Hynix Semiconductor – 240pin DDR2 SDRAM Unbuffered DIMMs

1240pin DDR2 SDRAM Unbuffered DIMMs
Parameter
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 setup time
(differential strobe)
DQ and DM input hold time
(differential strobe)
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 preamble
Write postamble
Address and control input setup time
Address and control input hold time
Read preamble
Read postamble
Auto-Refresh to Active/Auto-Refresh command period
Active to active command period for 1KB page
size products
Active to active command period for 2KB page
size products
Four Active Window for 1KB page size products
Four Active Window for 2KB page size products
Symbol
tAC
tDQSCK
tCH
tCL
tHP
tCK
DDR2-667
min
max
-450
+450
-400
+400
0.45
0.55
0.45
0.55
min(tCL,
-
tCH)
3000
8000
tDS
100
-
tDH
175
-
tIPW
0.6
-
tDIPW
tHZ
tLZ(DQS)
tLZ(DQ)
0.35
-
tAC min
2*tAC min
-
tAC max
tAC max
tAC max
tDQSQ
-
240
tQHS
tQH
-
340
tHP - tQHS
-
tDQSS
- 0.25
+ 0.25
tDQSH
0.35
-
tDQSL
0.35
-
tDSS
0.2
-
tDSH
0.2
-
tMRD
2
-
tWPRE
0.35
-
tWPST
0.4
0.6
tIS
200
-
tIH
275
-
tRPRE
0.9
1.1
tRPST
0.4
0.6
tRFC
127.5
-
tRRD
7.5
-
tRRD
10
-
tFAW
37.5
-
tFAW
50
-
DDR2-800
min
max
-400
+400
-350
+350
0.45
0.55
0.45
0.55
min(tCL,
-
tCH)
2500
50
-
Unit Note
ps
ps
tCK
tCK
ps
ps
ps
1
125
-
ps
1
0.6
-
tCK
0.35
-
tCK
-
tAC max ps
tAC min tAC max ps
2*tAC min tAC max ps
-
200
ps
-
300
ps
tHP - tQHS
-
ps
- 0.25
+ 0.25 tCK
0.35
0.35
0.2
0.2
2
0.35
0.4
175
250
0.9
0.4
127.5
-
tCK
-
tCK
-
tCK
-
tCK
-
tCK
-
tCK
0.6
tCK
-
ps
-
ps
1.1
tCK
0.6
tCK
-
ns
7.5
-
ns
10
-
ns
35
-
ns
45
-
ns
Rev. 0.6 / Jul. 2008
22