HY5PS56421LF-E3 Datasheet, PDF (23/35 Pages) Hynix Semiconductor – 256Mb DDR2 SDRAM

Parameter
Symbol
Four Active Window for 2KB page size products
CAS to CAS command delay
Write recovery time
Auto precharge write recovery + precharge time
Internal write to read command delay
Internal read to precharge command delay
Exit self refresh to a non-read command
Exit self refresh to a read command
Exit precharge power down to any non-read command
Exit active power down to read command
Exit active power down to read command
(Slow exit, Lower power)
CKE minimum pulse width
(high and low pulse width)
ODT turn-on delay
ODT turn-on
tFAW
tCCD
tWR
tDAL
tWTR
tRTP
tXSNR
tXSRD
tXP
tXARD
tXARDS
t_CKE
t_AOND
t_AON
ODT turn-on(Power-Down mode)
t_AONPD
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_AOFD
t_AOF
t_AOFPD
tANPD
tAXPD
tOIT
tDelay
HY5PS56421(L)F
HY5PS56821(L)F
HY5PS561621(L)F
-Continued
DDR2-667
min
max
50
-
2
15
-
WR+tRP
-
7.5
-
7.5
tRFC + 10
200
-
2
-
2
Unit
ns
tCK
ns
tCK
ns
ns
ns
tCK
tCK
tCK
Note
14
3
1
6 - AL
tCK
1, 2
3
tCK
2
2
tCK
tAC(min)
tAC(max)+0.7 ns
6,16
2tCK+tAC(ma
tAC(min)+2
x)
ns
+1
2.5
2.5
tCK
tAC(min)
tAC(max)+ 0.6 ns
17
tAC(min)+2
3
8
0
2.5tCK+tAC(
max)+1
ns
tCK
tCK
12
ns
tIS+tCK+tIH
ns
15
Rev 1.0/July. 2004
23