HYMP512U648 Datasheet, PDF (20/24 Pages) Hynix Semiconductor – 240pin DDR2 SDRAM Unbuffered DIMMs based on 512 Mb 1st ver.

1240pin DDR2 SDRAM Unbuffered DIMMs
- Continued -
Parameter
Symbol
DDR2-400
Min
Max
DDR2-533
Min
Max
Unit Note
Address and control input setup time
tIS
350
-
250
-
ps
Address and control input hold time
tIH
475
-
375
-
ps
Read preamble
tRPRE
0.9
1.1
0.9
1.1
tCK
Read postamble
tRPST
0.4
0.6
0.4
0.6
tCK
Auto-Refresh to Active/Auto-Refresh command
tRFC
105
-
105
-
ns
period
Row Active to Row Active Delay for 1KB page size
tRRD
7.5
-
7.5
-
ns
Row Active to Row Active Delay for 2KB page size
tRRD
10
-
10
-
ns
Four Activate Window for 1KB page size
tFAW
37.5
-
37.5
-
ns
Four Activate Window for 2KB page size
tFAW
50
-
50
-
ns
CAS to CAS command delay
tCCD
2
2
tCK
Write recovery time
tWR
15
-
15
-
ns
Auto Precharge Write Recovery + Precharge Time
tDAL
tWR+tRP
-
tWR+tRP
-
tCK
Write to Read Command Delay
tWTR
10
-
7.5
-
ns
Internal read to precharge command delay
tRTP
7.5
7.5
ns
Exit self refresh to a non-read command
tXSNR tRFC + 10
tRFC + 10
ns
Exit self refresh to a read command
tXSRD
200
-
200
-
tCK
Exit precharge power down to any non-read
command
tXP
2
-
2
-
tCK
Exit active power down to read command
tXARD
2
2
tCK
Exit active power down to read command
(Slow exit, Lower power)
tXARDS
6 - AL
6 - AL
tCK
CKE minimum pulse width(high and low pulse width) ^t_CKE
3
3
tCK
ODT turn-on delay
t_AOND
2
2
2
2
tCK
ODT turn-on
t_AON
tAC(min)
tAC(max)
+1
tAC(min)
tAC(max)
+1
ns
ODT turn-on(Power-Down mode)
t_AONPD
tAC(min)+2
2tCK+tAC
(max)+1
tAC(min)+2
2tCK+tAC
(max)+1
ns
ODT turn-off delay
t_AOFD
2.5
2.5
2.5
2.5
tCK
ODT turn-off
t_AOF
tAC(min)
tAC(max)
+ 0.6
tAC(min)
tAC(max)
+ 0.6
ns
ODT turn-off (Power-Down mode)
t_AOFPD
tAC(min)+2
2.5tCK+tA
C(max)+1
tAC(min)+2
2.5tCK+tA
C(max)+1
ns
ODT to power down entry latency
tANPD
3
3
tCK
ODT power down exit latency
tAXPD
8
8
tCK
OCD drive mode output delay
tOIT
0
12
0
12
ns
Minimum time clocks remains ON after CKE
asynchronously drops LOW
tDelay tIS+tCK+tIH
tIS+tCK+tIH
ns
Average periodic Refresh Interval
tREFI
-
7.8
-
7.8
us 2
tREFI
-
3.9
-
3.9
us 3
Notes :
1. For details and notes, please refer to the relevant Hynix component datasheet(HY5PS12[8/16]21(L)F).
2. 0°C ≤ TCASE ≤ 85°C
3. 85°C ＜ TCASE ≤ 95°C
Rev. 1.0 / Apr. 2005
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