IS43R32800B Datasheet, PDF (15/39 Pages) Integrated Silicon Solution, Inc – Differential clock input

IS43R32800B
AC TIMING REQUIREMENTS
Symbol
AC Characteristics Parameter
tAC D Q Output access time from CLK //CL K
tDQS CK DQS O utput access time from CLK //CL K
tCH C LK Highlevel width
tCL C LK Low level width
tCK CL K c ycle time
tDS I nput Setup time (DQ ,DM)
tDH I nput Hold time(DQ,DM )
tIPW Control & address input pulse width(for eachinput)
tDIP W D Q and DM input pulse width (for each input)
tHZ Data-out-highimpedance time from CLK //CL K
tLZ Data-out-low impedance time fromCL K//CLK
tDQS Q DQ V alid data delay time from DQS
tHP C lock half period
CL =3.0
CL =2.5
CL =2.0
-5
Min.
Max
-0.70 +0.70
-0.6
+0.6
0.45
0.55
0.45
0.55
5
7.5
5
12
7.5
12
0.4
0.4
2.2
1.75
+0.70
-0.70 +0.70
0.40
-6
Min.
Max
-0.70 +0.70
-0.60 +0.60
0.45
0.55
0.45
0.55
6
12
6
12
7.5
12
0.45
0.45
2.2
1.75
+0.70
-0.70 +0.70
0.45
-75
Min.
Max
-0.75 +0.75
-0.75 +0.75
0.45
0.55
0.45
0.55
7.5
12
7.5
12
7.5
12
0.5
0.5
2.2
1.75
+0.75
-0.75 +0.75
0.5
tCLmin or
tCHmin
tCLmin or
tCHmin
tCLmin or
tCHmin
Unit Notes
ns
ns
tCK
tCK
ns
ns
ns
ns
ns
ns
ns
ns 14
ns 14
ns
ns 20
tQH DQ output hold time from DQS (per access)
tQHS Data hold skew factor (for DQ S & a ssociated DQ signals)
tDQS S W rite command to first DQS latchingtransition
tDQS H DQS input High level width
tDQS L D QS input Low level width
tDSS DQS falling edge to CLK setup time
tDSH DQS falling edge hold time from CLK
tMRD Mode Register Set command cycle time
tWPR ES Write preamble setup time
tWPST Write postamble
tWPR E W rite preamble
tIS I nput Setup time (address and control)
tIH I nput Hold time (address and control)
tRPST Read postamble
tRPR E R ead preamble
tHP- tQHS
tHP- tQHS
tHP- tQHS
ns
0.50
0.55
0.75
0.72
1.25
0.75
1.25
0.75
1.25 tCK
0.35
0.35
0.35
tCK
0.35
0.35
0.35
tCK
0.2
0.2
0.2
tCK
0.2
0.2
0.2
tCK
2
2
2
tCK
0
0
0
ns 16
0.4
0.6
0.4
0.6
0.4
0.6 tCK 1 5
0.25
0.25
0.25
tCK
0.6
0.75
0.9
ns 19
0.6
0.75
0.9
ns 19
0.4
0.6
0.4
0.6
0.4
0.6 tCK
0.9
1.1
0.9
1.1
0.9
1.1 tCK
Integrated Silicon Solution, Inc. — www.issi.com
15
Rev.  00D
03/19/08