K4T51043Q Datasheet, PDF (20/28 Pages) Samsung semiconductor – 512Mb B-die DDR2 SDRAM

512Mb B-die DDR2 SDRAM
DDR2 SDRAM
Parameter
Symbol
CKE minimum pulse width (high and low pulse width)
ODT turn-on delay
ODT turn-on
ODT turn-on(Power-Down mode)
ODT turn-off delay
ODT turn-off
ODT turn-off (Power-Down mode)
ODT to power down entry latency
ODT power down exit latency
OCD drive mode output delay
Minimum time clocks remains ON after CKE asynchronously
drops LOW
t_CKE
t_AOND
t_AON
t_AONPD
t_AOFD
t_AOF
t_AOFPD
tANPD
tAXPD
tOIT
tDelay
DDR2-533
DDR2-400
min
max
min
max
3
3
2
2
2
2
tAC(min) tAC(max)+1 tAC(min) tAC(max)+1
tAC(min)+2
2tCK+tAC
(max)+1
tAC(min)+2
2tCK+tAC
(max)+1
2.5
2.5
2.5
2.5
tAC(min)
tAC(max)+ 0.6 tAC(min)
tAC(max)+ 0.6
tAC(min)+2
3
8
0
2.5tCK+
tAC(max)+1
12
tAC(min)+2
3
8
0
2.5tCK+
tAC(max)+1
12
tIS+tCK +tIH
tIS+tCK +tIH
Units
tCK
tCK
ns
ns
tCK
ns
ns
tCK
tCK
ns
ns
Notes
36
13, 25
26
24
Page 20 of 28
Rev. 1.5 July 2005