K4T56163QI Datasheet, PDF (18/42 Pages) Samsung semiconductor – 256Mb I-die DDR2 SDRAM Specification

K4T56163QI
DDR2 SDRAM
Parameter
Symbol
Four Activate Window for 1KB page size products tFAW
Four Activate Window for 2KB page size products tFAW
CAS to CAS command delay
tCCD
Write recovery time
tWR
Auto precharge write recovery + precharge time tDAL
Internal write to read command delay
tWTR
Internal read to precharge command delay
tRTP
Exit self refresh to a non-read command
tXSNR
Exit self refresh to a read command
tXSRD
Exit precharge power down to any non-read com-
mand
tXP
Exit active power down to read command
tXARD
Exit active power down to read command
(slow exit, lower power)
tXARDS
CKE minimum pulse width
(high and low pulse width)
ODT turn-on delay
t_CKE
t_AOND
ODT turn-on
t_AON
ODT turn-on(Power-Down mode)
ODT turn-off delay
ODT turn-off
t_AONPD
t_AOFD
t_AOF
ODT turn-off (Power-Down mode)
t_AOFPD
ODT to power down entry latency
tANPD
ODT power down exit latency
tAXPD
OCD drive mode output delay
tOIT
Minimum time clocks remains ON after CKE asyn-
chronously drops LOW
tDelay
DDR2-800
min
max
35
45
2
x
15
x
WR+tRP
x
7.5
7.5
tRFC + 10
200
x
2
x
2
x
8 - AL
DDR2-667
min
max
37.5
50
2
15
x
WR+tRP
x
7.5
x
7.5
tRFC + 10
200
2
x
2
x
7 - AL
DDR2-533
min
max
37.5
50
2
15
x
WR+tRP
x
7.5
x
7.5
tRFC + 10
200
2
x
2
x
6 - AL
DDR2-400
min
max
37.5
50
2
15
x
WR+tRP
x
10
x
7.5
tRFC + 10
200
2
x
2
x
6 - AL
Units
ns
ns
tCK
ns
tCK
ns
ns
ns
tCK
tCK
tCK
tCK
3
3
3
3
tCK
2
2
2
2
2
2
2
2
tCK
tAC(min)
tAC(max)
+ 0.7
tAC(min)
tAC(max)
+0.7
tAC(min)
tAC(max)
+1
tAC(min)
tAC(max)
+1
ns
tAC(min)+
2
2tCK +
tAC(max)
+1
tAC(min)+ 2tCK+tAC tAC(min)+
2
(max)+1
2
2tCK+tA
C(max)+
1
tAC(min)+ 2tCK+tAC
2
(max)+1
ns
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
tCK
tAC(min)
tAC(max)
+ 0.6
tAC(min)
tAC(max)
+ 0.6
tAC(min)
tAC(max)
+ 0.6
tAC(min)
tAC(max)
+ 0.6
ns
tAC(min)+
2
2.5tCK +
tAC(max)
+1
tAC(min)+
2
2.5tCK+t
AC(max)
+1
tAC(min)+
2
2.5tCK+
tAC(max)
+1
tAC(min)+
2
2.5tCK+
tAC(max)
+1
ns
3
3
3
3
tCK
8
8
8
8
tCK
0
12
0
12
0
12
0
12
ns
tIS+tCK
+tIH
tIS+tCK
+tIH
tIS+tCK
+tIH
tIS+tCK
+tIH
ns
Notes
23
33
11
9
9, 10
36
13, 25
26
24
18 of 42
Rev. 1.0 October 2007