HANBit
System Characteristics for DDR SDRAM
HDD128M72D18RPW
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
DQ/DM/DQS input slew rate measured between
VIH(DC), VIL(DC) and VIL(DC), VIH(DC)
SYMBOL
DCSLEW
DDR333
MIN
TBD
MAX
TBD
DDR266
MIN
TBD
MAX
TBD
Units
V/ns
Notes
a, m
Table 2 : Input Setup & Hold Time Derating for Slew Rate
INPUT SLEW RATE
0.5 V/ns
0.4 V/ns
0.3 V/ns
TIS
0
+50
+100
TIH
0
0
0
UNITS
ps
ps
ps
NOTES
i
i
i
Table 3 : Input/Output Setup & Hold Time Derating for Slew Rate
INPUT SLEW RATE
0.5 V/ns
0.4 V/ns
0.3 V/ns
TDS
0
+75
+150
TDH
0
+75
+150
UNITS
ps
ps
ps
NOTES
k
k
k
Table 4 : Input/Output Setup & Hold Derating for Rise/Fall Delta Slew Rate
DELTA SLEW RATE
+/- 0.0 V/ns
+/- 0.25 V/ns
+/- 0.5 V/ns
TDS
0
+50
+100
TDH
0
+50
+100
UNITS
ps
ps
ps
NOTES
j
j
j
Table 5 : Output Slew Rate Characteristice (X4, X8 Devices only)
SLEW RATE CHARACTERISTIC
Pullup Slew Rate
Pulldown slew
TYPICAL RANGE
(V/NS)
1.2 ~ 2.5
1.2 ~ 2.5
MINIMUM
(V/NS)
1.0
1.0
MAXIMUM
(V/NS)
4.5
4.5
NOTES
a,c,d,f,g,h
b,c,d,f,g,h
Table 6 : Output Slew Rate Characteristice (X16 Devices only)
SLEW RATE CHARACTERISTIC
Pullup Slew Rate
Pulldown slew
TYPICAL RANGE
(V/NS)
1.2 ~ 2.5
1.2 ~ 2.5
MINIMUM
(V/NS)
0.7
0.7
MAXIMUM
(V/NS)
5.0
5.0
NOTES
a,c,d,f,g,h
b,c,d,f,g,h
Table 7 : Output Slew Rate Matching Ratio Characteristics
AC CHARACTERISTICS
PARAMETER
Output Slew Rate Matching Ratio (Pullup to Pulldown)
DDR333
MIN
TBD
MAX
TBD
DDR266
MIN
TBD
MAX
TBD
Notes
e,m
URL : www.hbe.co.kr
REV 1.0 (January. 2005)
9
HANBit Electronics Co.,Ltd.
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