HANBit
HDD128M72D18RPW
System Characteristics for DDR SDRAM
The following specification parameters are required in systems using DDR333, DDR266 devices to ensure proper
system performance. these characteristics are for system simulation purposes and are guaranteed by design.
Table 1 : Input Slew Rate for DQ, DQS, and DM
AC CHARACTERISTICS
PARAMETER
DDR333
DDR266
MIN
SYMBOL
DCSLEW
MIN
MAX
MAX
TBD
Units
V/ns
Notes
a, m
DQ/DM/DQS input slew rate measured between
VIH(DC), VIL(DC) and VIL(DC), VIH(DC)
TBD
TBD
TBD
Table 2 : Input Setup & Hold Time Derating for Slew Rate
INPUT SLEW RATE
0.5 V/ns
TIS
0
TIH
0
UNITS
NOTES
ps
ps
ps
i
i
i
0.4 V/ns
+50
+100
0
0.3 V/ns
0
Table 3 : Input/Output Setup & Hold Time Derating for Slew Rate
INPUT SLEW RATE
0.5 V/ns
TDS
0
TDH
0
UNITS
ps
NOTES
k
k
k
0.4 V/ns
+75
+150
+75
+150
ps
0.3 V/ns
ps
Table 4 : Input/Output Setup & Hold Derating for Rise/Fall Delta Slew Rate
DELTA SLEW RATE
+/- 0.0 V/ns
TDS
0
TDH
0
UNITS
ps
NOTES
j
j
j
+/- 0.25 V/ns
+50
+100
+50
+100
ps
+/- 0.5 V/ns
ps
Table 5 : Output Slew Rate Characteristice (X4, X8 Devices only)
TYPICAL RANGE
(V/NS)
MINIMUM
MAXIMUM
(V/NS)
4.5
SLEW RATE CHARACTERISTIC
NOTES
(V/NS)
1.0
Pullup Slew Rate
Pulldown slew
1.2 ~ 2.5
a,c,d,f,g,h
b,c,d,f,g,h
1.2 ~ 2.5
1.0
4.5
Table 6 : Output Slew Rate Characteristice (X16 Devices only)
TYPICAL RANGE
(V/NS)
MINIMUM
MAXIMUM
(V/NS)
5.0
SLEW RATE CHARACTERISTIC
NOTES
(V/NS)
0.7
Pullup Slew Rate
Pulldown slew
1.2 ~ 2.5
a,c,d,f,g,h
b,c,d,f,g,h
1.2 ~ 2.5
0.7
5.0
Table 7 : Output Slew Rate Matching Ratio Characteristics
AC CHARACTERISTICS
PARAMETER
DDR333
MAX
DDR266
MIN
TBD
MIN
MAX
Notes
e,m
Output Slew Rate Matching Ratio (Pullup to Pulldown)
TBD
TBD
TBD
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HANBit Electronics Co.,Ltd.
REV 1.0 (January. 2005)
HANBIT [ HANBIT ELECTRONICS CO.,LTD ]
