K4D263238E Datasheet, PDF (13/17 Pages) Samsung semiconductor – 1M x 32Bit x 4 Banks Graphic Double Data Rate Synchronous DRAM with Bi-directional Data Strobe and DLL

K4D263238E-GC
128M GDDR SDRAM
AC CHARACTERISTICS
Parameter
Symbol
-25
Min Max
CL=3
-
CK cycle time
CL=4 tCK
-
4
CL=5
2.5
CK high level width
tCH
0.45 0.55
CK low level width
tCL
0.45 0.55
DQS out access time from CK tDQSCK -0.55 0.55
Output access time from CK
tAC
-0.55 0.55
Data strobe edge to Dout edge tDQSQ
-
0.35
Read preamble
tRPRE
0.9
1.1
Read postamble
tRPST
0.4
0.6
CK to valid DQS-in
tDQSS
0.85 1.15
DQS-In setup time
tWPRES
0
-
DQS-in hold time
tWPREH 0.35
-
DQS write postamble
tWPST
0.4
0.6
DQS-In high level width
tDQSH
0.45 0.55
DQS-In low level width
tDQSL
0.45 0.55
Address and Control input setup tIS
0.8
-
Address and Control input hold tIH
0.8
-
DQ and DM setup time to DQS tDS
0.35
-
DQ and DM hold time to DQS tDH
0.35
-
Clock half period
tCLmin
tHP
or
-
tCHmin
Data Hold skew factor
tQHS
-
0.4
Data output hold time from DQS tQH
tHP-
tQHS
-
Jitter over 1~6 clock cycle error _tJ^*1
-
75
Cycle to cyde duty cycle error tDCERR
-
75
Rise and fall times of CK
tR, tF
-
600
-2A
Min Max
-
2.86
4
-
0.45 0.55
0.45 0.55
-0.55 0.55
-0.55 0.55
-
0.35
0.9
1.1
0.4
0.6
0.85 1.15
0
-
0.35
-
0.4
0.6
0.45 0.55
0.45 0.55
0.8
-
0.8
-
0.35
-
0.35
-
tCLmin
or
-
tCHmin
-
0.4
tHP-
tQHS
-
-
75
-
75
-
600
*1. The cycle to cycle jitter over 1~6 cycle short term jitter.
-33
Min Max
-
3.3
10
0.45 0.55
0.45 0.55
-0.55 0.55
-0.55 0.55
-
0.35
0.9
1.1
0.4
0.6
0.85 1.15
0
-
0.35
-
0.4
0.6
0.45 0.55
0.45 0.55
0.8
-
0.8
-
0.35
-
0.35
-
tCLmin
or
-
tCHmin
-
0.4
tHP-
tQHS
-
-
85
-
85
-
700
-36
Min Max
-
3.6
10
0.45 0.55
0.45 0.55
-0.6
0.6
-0.6
0.6
-
0.40
0.9
1.1
0.4
0.6
0.85 1.15
0
-
0.35
-
0.4
0.6
0.45 0.55
0.45 0.55
0.9
-
0.9
-
0.40
-
0.40
-
tCLmin
or
-
tCHmin
-
0.45
tHP-
tQHS
-
-
95
-
95
-
700
-40
Min Max
-
4.0
10
0.45 0.55
0.45 0.55
-0.6
0.6
-0.6 -0.6
-
0.40
0.9
1.1
0.4
0.6
0.8
1.2
0.
-
0.35
-
0.4
0.6
0.45 0.55
0.45 0.55
0.9
-
0.9
-
0.40
-
0.40
-
tCLmin
or
-
tCHmin
-
0.45
tHP-
tQHS
-
-
100
-
100
-
700
-45
Min Max
4.5
-
10
0.45 0.55
0.45 0.55
-0.7
0.7
-0.7
0.7
-
0.45
0.9
1.1
0.4
0.6
0.8
1.2
0.
-
0.3
-
0.4
0.6
0.45 0.55
0.45 0.55
1.0
-
1.0
-
0.45
-
0.45
-
tCLmin
or
-
tCHmin
-
0.5
tHP-
tQHS
-
-
105
-
105
-
700
Unit Note
ns
ns
ns
tCK
tCK
ns
ns
ns 1
tCK
tCK
tCK
ns
tCK
tCK
tCK
tCK
ns
ns
ns
ns
ns 1
ns
ns 1
ps
ps
ps
Simplified Timing @ BL=2, CL=4
0
1
CK, CK
tCH
tCL
tCK
2
3
4
5
CS
DQS
DQ
DM
COMMAND READA
tRPRE
tDQSCK
tRPST
tDQSQ
tAC
Qa1 Qa2
6
7
8
tIS
tIH
tDQSS
tWPREH
tDQSH
tDQSL
tWPRES
tDS tDH
Db0 Db1
WRITEB
- 13 -
Rev 1.7 (Nov. 2003)