HYB18T512400BF Datasheet, PDF (50/57 Pages) Qimonda AG – 512-Mbit Double-Data-Rate-Two SDRAM

HYB18T512xxxBF–[2.5…5]
512-Mbit Double-Data-Rate-Two SDRAM
7.3
ODT AC Electrical Characteristics
Table 45 ODT AC Electrical Characteristics and Operating Conditions for DDR2-667
Symbol Parameter / Condition
Values
Unit Note
Min.
Max.
t_AOND
t_AON
ODT turn-on delay
ODT turn-on
2
t_AC.MIN
2
t_AC.MAX + 0.7 ns
t_CK
—
ns
1)
t_AONPD ODT turn-on (Power-Down Modes)
t_AC.MIN + 2 ns 2 t_{CK +} t_AC.MAX + 1 ns ns
—
t_AOFD
t_AOF
ODT turn-off delay
ODT turn-off
2.5
t_AC.MIN
2.5
t_AC.MAX + 0.6 ns
t_CK
—
ns
2)
t_AOFPD ODT turn-off (Power-Down Modes)
t_AC.MIN + 2 ns 2.5 t_{CK +} t_AC.MAX + 1 ns ns
—
t_ANPD
ODT to Power Down Mode Entry Latency 3
—
t_CK
—
t_AXPD
ODT Power Down Exit Latency
8
—
t_CK
—
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 t_AOND.
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 t_AOFD.
Table 46 ODT AC Electrical Characteristics and Operating Conditions for DDR2-533 and DDR2-400
Symbol Parameter / Condition
Values
Unit Note
Min.
Max.
t_AOND
t_AON
ODT turn-on delay
ODT turn-on
2
t_AC.MIN
2
t_AC.MAX + 1 ns
t_CK
—
ns
1)
t_AONPD ODT turn-on (Power-Down Modes)
t_AC.MIN + 2 ns 2 t_{CK +} t_AC.MAX + 1 ns ns
—
t_AOFD
t_AOF
ODT turn-off delay
ODT turn-off
2.5
t_AC.MIN
2.5
t_AC.MAX + 0.6 ns
t_CK
—
ns
2)
t_AOFPD ODT turn-off (Power-Down Modes)
t_AC.MIN + 2 ns 2.5 t_{CK +} t_AC.MAX + 1 ns ns
—
t_ANPD
ODT to Power Down Mode Entry Latency 3
—
t_CK
—
t_AXPD
ODT Power Down Exit Latency
8
—
t_CK
—
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 t_AOND.
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 t_AOFD.
Internet Data Sheet
50
Rev. 1.05, 2007-01
03292006-YBYM-WG0Z