EM44DM1688LBB
AC Operating Test Characteristics (Continued)
(VDD=1.8V±0.1V)
DDR2-800
DDR2-1066
Units
Symbol
Parameter
Min.
2
Max.
Min.
2
Max.
tAOND
tAOFD
ODT turn-on delay
ODT turn-off delay
-
-
-
-
tCK
tCK
2.5
2.5
tAC(min.)
tAC(max)
+2.575
tAON
tAOF
ODT turn-on(Note1)
ODT turn-off(Note2)
tAC(min.)
tAC(min.)
tAC(max) +0.7
ns
ns
ns
tAC(max) +0.6
2*tCK +
tAC(min.)
tAC(max) +0.6
2*tCK
ODT turn-on in power-down
mode
tAC(min.)
+2
+
+
tAONPD
tAC(min.) +2
t
AC(max) +1
t
AC(max) +1
2.5*tCK
tAC(max) +1
ODT turn-off in power-down
mode
2.5*tCK +
tAC(min.)
+2
tAOFPD
tAC(min.) +2
ns
t
AC(max) +1
ODT to power-down mode entry
latency
tANPD
tAXPD
3
8
-
-
2.5
11
-
-
tCK
tCK
ODT power-down exit latency
Note 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
.
Note 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
.
Nov. 2011
14/29
www.eorex.com
EOREX [ EOREX CORPORATION ]
