HYB18H512321AF
512-Mbit GDDR3
Electrical Characteristics
Table 38
Timing Parameters (HYB18H512321AF–12/14/16/20)
Parameter
CAS
latency
Symbol
Limit Values
–16
Unit
–20
–12
–14
min max min max min max min
max
—
0.16
0.16
0.40
—
—
—
0.18
0.18
0.40
—
—
—
0.20
0.20
0.40
—
—
—
0.24
0.24
0.40
Data-in and Data Mask to
WDQS Setup Time
Data-in and Data Mask to
WDQS Hold Time
Data-in and DM input pulse
width (each input)
tDS
ns
ns
tCK
—
—
tDH
tDIPW
0.40
0.40
0.75
0.75
9
—
0.40
0.40
0.75
0.75
8
—
0.40
0.40
0.75
0.75
7
—
0.40
0.40
0.75
0.75
6
—
DQS input low pulse width
DQS input high pulse width
DQS Write Preamble Time
DQS Write Postamble Time
Write Recovery Time
tDQSL
tDQSH
tWPRE
tWPST
tWR
tCK
tCK
tCK
tCK
tCK
—
—
—
—
1.25
1.25
—
1.25
1.25
—
1.25
1.25
—
1.25
1.25
—
7)
Read Cycle Timing Parameters for Data and Data Strobe
-0.22 0.22 –0.25 0.25
–0.28 0.28
–0.35 0.35
Data Access Time from Clock tAC
ns
tCK
tCK
ns
0.75
0.75
1.25
1.25
0.75
0.75
1.25
1.25
0.75
0.75
1.25
1.25
0.75
0.75
1.25
1.25
Read Preamble
Read Postamble
tRPRE
tRPST
tACmin tACmax tACmin tACmax tACmin tACmax tACmin tACmax
tACmin tACmax tACmin tACmax tACmin tACmax tACmin tACmax
-0.22 0.22 –0.25 0.25 –0.28 0.28 –0.35 0.35
Data-out high impedance time tHZ
from CLK
Data-out low impedance time tLZ
ns
from CLK
DQS edge to Clock edge skew tDQSCK
ns
ns
9)
—
0.140
—
0.160
—
0.180
—
0.225
DQS edge to output data edge tDQSQ
skew
—
0.140
—
0.160
—
0.180
—
0.225
Data hold skew factor
Data output hold time from
DQS
tQHS
tQH
ns
ns
tHP–tQHS
tHP–tQHS
tHP–tQHS
tHP–tQHS
Refresh/Power Down Timing
Refresh Period (8192 cycles) tREF
—
32
—
—
32
—
—
32
—
—
32
—
ms
µs
3.9
3.9
3.9
3.9
Average periodic Auto Refresh tREFI
interval
52.0
52.0
52.8
54
Delay from AREF to next ACT/ tRFC
ns
AREF
1000
7
—
—
1000
6
—
—
1000
5
—
—
1000
4
—
—
Self Refresh Exit time
tXSC
tXPN
tCK
tCK
Power Down Exit time
Other Timing Parameters
RES to CKE setup timing
RES to CKE hold timing
10
10
10
—
—
—
10
10
10
—
—
—
10
10
10
—
—
—
10
10
10
—
—
—
tATS
tATH
ns
ns
ns
Termination update Keep Out tKO
timing
Data Sheet
93
Rev. 1.73, 2005-08
05122004-B1L1-JEN8
QIMONDA [ QIMONDA AG ]
