K4D551638F-LC40000 Samsung, K4D551638F-LC40000 Datasheet - Page 14

• Manufacturer Part Number: K4D551638F-LC40000
• Description: No Discount To Anyone!
• Manufacturer: Samsung

K4D551638F-TC
AC CHARACTERISTICS (I)
Note : 1. For normal write operation, even numbers of Din are to be written inside DRAM
AC CHARACTERISTICS (II)
Row cycle time
Refresh row cycle time
Row active time
RAS to CAS delay for Read
RAS to CAS delay for Write
Row precharge time
Row active to Row active
Last data in to Row precharge @Nor-
mal Precharge
Last data in to Row precharge @Auto
Precharge
Last data in to Read command
Col. address to Col. address
Mode register set cycle time
Auto precharge write recovery + Pre-
charge
Exit self refresh to read command
Power down exit time
Refresh interval time
K4D551638F-TC33
K4D551638F-TC36
K4D551638F-TC40
K4D551638F-TC50
K4D551638F-TC60
300MHz ( 3.3ns )
275MHz ( 3.6ns )
250MHz ( 4.0ns )
200MHz ( 5.0ns )
200MHz ( 5.0ns )
166MHz ( 6.0ns )
Frequency
Frequency
Frequency
Frequency
Frequency
Parameter
Cas Latency
Cas Latency
Cas Latency
Cas Latency
Cas Latency
3
3
3
3
3
3
tRC
tRFC
tRAS
tRCDRD
tRCDWR
tRP
tRRD
tWR
tWR_A
tCDLR
tCCD
tMRD
tDAL
tXSR
tPDEX
tREF
Symbol
tRC
tRC
tRC
tRC
tRC
15
15
13
12
12
10
3tCK
Min
+tIS
200
7.8
15
17
10
5
3
5
3
3
3
3
1
2
8
-33
tRFC
tRFC
tRFC
tRFC
tRFC
17
17
15
14
14
12
100K
Max
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
3tCK
tRAS
tRAS
tRAS
tRAS
tRAS
Min
+tIS
200
7.8
15
17
10
1
10
10
5
3
5
3
3
3
2
2
8
- 14 -
9
8
8
7
-36
100K
Max
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
tRCDRD tRCDWR
tRCDRD tRCDWR
tRCDRD tRCDWR
tRCDRD tRCDWR
tRCDRD tRCDWR
5
5
4
4
4
3
3tCK
Min
+tIS
200
7.8
13
15
9
4
2
4
3
3
3
2
1
2
7
-40
100K
Max
3
3
2
2
2
2
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
1tCK
Min
+tIS
200
7.8
12
14
8
4
2
3
3
1
2
7
4
2
2
256M GDDR SDRAM
tRP
tRP
tRP
tRP
tRP
-50
5
5
4
4
4
3
100K
Max
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
tRRD
tRRD
tRRD
tRRD
tRRD
Rev 2.1 (Apr. 2005)
1tCK
Min
+tIS
3
3
3
3
3
2
200
7.8
10
12
7
3
2
3
2
3
3
1
1
2
6
-60
(Unit : Number of Clock)
100K
Max
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
tDAL
tDAL
tDAL
tDAL
tDAL
8
8
7
7
7
6
Unit Note
tCK
tCK
tCK
tCK
tCK
tCK
tCK
tCK
tCK
tCK
tCK
tCK
tCK
tCK
ns
us
Unit
tCK
Unit
tCK
Unit
tCK
tCK
Unit
tCK
Unit
tCK
1
1
1