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K4C89183AF Datasheet, PDF (11/55 Pages) Samsung semiconductor – 288Mb x18 Network-DRAM2 Specification
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K4C89183AF
AC Characteristics and Operating Conditions (Notes : 1, 2)
Symbol
Parameter
F6
Min Max
FB
Min Max
F5
Units Notes
Min Max
tRC
Random Cycle Time
20.0
-
22.5
-
25
-
3
tCK
Clock Cycle Time
CL = 4
4.0
6.0
4.5
6.0
5.0
6.0
3
CL = 5 3.33
6.0
3.75
6.0
4.5
6.0
3
CL = 6
3.0
6.0
3.33
6.0
4.0
6.0
3
tRAC
Random Access Time
-
20.0
-
22.5
-
25
3
tCH
Clock High Time
0.45*tCK
-
0.45*tCK
-
0.45*tCK
-
3
tCL
Clock Low Time
0.45*tCK
-
0.45*tCK
-
0.45*tCK
-
3
tCKQS
QS Access Time from CLK
-0.45
0.45
-0.45
0.45
-0.5
0.5
3, 8
tQSQ
Data Output Skew from QS
-
0.2
-
0.25
-
0.3
4
tAC
Data Access Time from CLK
-0.5
0.5
-0.5
0.5
-0.6
0.6
3, 8
tOH
Data Output Hold Time from CLK
-0.5
0.5
-0.5
0.5
-0.6
0.6
3, 8
tHP
CLK half period ( minium of Actual tCH, tCL)
min(tCH,
tCL)
-
min(tCH,
tCL)
-
min(tCH,
tCL)
-
3
tQSP
QS(Read) Pulse Width
tHP-tQHS
-
tHP-tQHS
-
tHP-tQHS
-
4, 8
tQSQV
Data Output Valid Time from QS
tHP-tQHS
-
tHP-tQHS
-
tHP-tQHS
-
4, 8
tQHS
DQ, QS Hold skew factor
0.055x
0.055x
0.055x
-
tCK+0.17
-
tCK+0.17
-
tCK+0.17
tDQSS
tDSPRE
DS(Write) Low to High Setup Time
DS(Write) Preamble Pulse Width
0.8*tCK
1.2*tCK
0.8*tCK
1.2*tCK
0.8*tCK 1.2*tCK
ns
3
0.4*tCK
-
0.4*tCK
-
0.4*tCK
-
4
tDSPRES DS First Input Setup Time
0
-
0
-
0
-
3
tDSPREH DS First Low Input Hold Time
0.3*tCK
-
0.3*tCK
-
0.3*tCK
-
3
tDSP
DS High or Low Input Pulse Width
0.45*tCK 0.55*tCK 0.45*tCK 0.55*tCK 0.45*tCK 0.55*tCK
4
CL = 4 0.75
-
0.8
-
1.0
-
3, 4
tDSS
DS Input Falling Edge to Clock Setup
Time
CL = 5
CL = 6
0.75
0.75
-
-
0.8
0.8
-
-
1.0
1.0
-
-
3, 4
3, 4
CL = 7
-
-
-
-
-
-
3, 4
tDSPST DS(Write) Postamble Pulse Width
0.45*tCK
-
0.45*tCK
0.45*tCK
-
4
CL = 4 0.75
-
0.8
-
1.0
-
3, 4
CL = 5 0.75
-
0.8
-
1.0
-
3, 4
tDSPSTH DS(Write) Postamble Hold Time
CL = 6 0.75
-
0.8
-
1.0
3, 4
CL = 7
-
-
-
-
-
-
3, 4
tDS
Data Input Setup Time from DS
0.3
-
0.35
-
0.4
-
4
tDH
Data Input Hold Time from DS
0.3
-
0.35
-
0.4
-
4
tIS
Command / Address Input Setup Time
0.6
-
0.6
-
0.7
-
3
tIH
Command / Address Input Hold Time
0.6
-
0.6
-
0.7
-
3
- 11 -
REV. 0.7 Jan. 2005
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