HYB18T1G[40/80/16]0AF(L)–[3S/3.7/5]
1-Gbit DDR2 SDRAM
Timing Characteristics
7.3
ODT AC Electrical Characteristics
Table 39
ODT AC Characteristics and Operating Conditions for DDR2-667
Symbol Parameter / Condition
Values
Min.
2
Unit
Note
Max.
tAOND
tAON
ODT turn-on delay
2
tCK
ns
ns
tCK
ns
1)
ODT turn-on
tAC.MIN
t
AC.MAX + 0.7 ns
AC.MAX + 1 ns
tAONPD
tAOFD
tAOF
ODT turn-on (Power-Down Modes)
ODT turn-off delay
t
AC.MIN + 2 ns 2 tCK +
t
2.5
2.5
2)
ODT turn-off
tAC.MIN
tAC.MAX + 0.6 ns
tAOFPD
tANPD
tAXPD
ODT turn-off (Power-Down Modes)
tAC.MIN + 2 ns 2.5 tCK + tAC.MAX + 1 ns ns
ODT to Power Down Mode Entry Latency 3
ODT Power Down Exit Latency
—
—
tCK
tCK
8
1) ODT turn on time min. is when the device leaves high impedance and ODT resistance begins to turn on. ODT turn on time
max is when the ODT resistance is fully on. Both are measure from tAOND
2) ODT turn off time min. is when the device starts to turn off ODT resistance. ODT turn off time max is when the bus is in high
impedance. Both are measured from tAOFD
.
.
Table 40
ODT AC Electrical Characteristics and Operating Conditions for DDR2-533 and DDR2-400
Symbol Parameter / Condition
Values
Min.
2
Unit
Note
Max.
tAOND
tAON
ODT turn-on delay
2
tCK
ns
ns
tCK
ns
1)
ODT turn-on
tAC.MIN
t
AC.MAX + 1 ns
AC.MAX + 1 ns
tAONPD
tAOFD
tAOF
ODT turn-on (Power-Down Modes)
ODT turn-off delay
t
AC.MIN + 2 ns 2 tCK +
t
2.5
2.5
2)
ODT turn-off
tAC.MIN
tAC.MAX + 0.6 ns
tAOFPD
tANPD
tAXPD
ODT turn-off (Power-Down Modes)
tAC.MIN + 2 ns 2.5 tCK + tAC.MAX + 1 ns ns
ODT to Power Down Mode Entry Latency 3
ODT Power Down Exit Latency
—
—
tCK
tCK
8
1) ODT turn on time min. is when the device leaves high impedance and ODT resistance begins to turn on. ODT turn on time
max is when the ODT resistance is fully on. Both are measure from tAOND
2) ODT turn off time min. is when the device starts to turn off ODT resistance. ODT turn off time max is when the bus is in high
.
impedance. Both are measured from tAOFD
.
Internet Data Sheet
46
Rev. 1.31, 2007-01
03292006-1X3H-6X8S
QIMONDA [ QIMONDA AG ]
