k4d263238e-gc Samsung Semiconductor, Inc., k4d263238e-gc Datasheet - Page 15

• Manufacturer Part Number: k4d263238e-gc
• Description: 1m X 32bit X 4 Banks Graphic Double Data Rate Synchronous Dram With Bi-directional Data Strobe And Dll
• Manufacturer: Samsung Semiconductor, Inc.

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
K4D263238E-GC25
K4D263238E-GC2A
K4D263238E-GC33
K4D263238E-GC
350MHz ( 2.86ns )
400MHz ( 2.5ns )
300MHz ( 3.3ns )
275MHz ( 3.6ns )
250MHz ( 4.0ns )
222MHz ( 4.5ns )
300MHz ( 3.3ns )
275MHz ( 3.6ns )
250MHz ( 4.0ns )
222MHz ( 4.5ns )
Frequency
Frequency
Frequency
Parameter
Cas Latency
Cas Latency
Cas Latency
5
4
4
4
4
3
4
4
4
3
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
Symbol
RC
RFC
RAS
RCDRD
RCDWR
RP
RRD
WR
WR_A
CDLR
CCD
MRD
XSR
PDEX
REF
DAL
3tCK+
tRC
tRC
tRC
17
15
13
13
13
12
13
13
13
12
Min
200
7.8
17
19
12
tIS
6
4
5
4
3
3
2
1
2
8
-25
100K
Max
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
tRFC
tRFC
tRFC
19
17
15
15
15
14
15
15
15
14
3tCK+
Min
200
7.8
tIS
15
17
10
5
3
5
4
3
3
2
1
2
8
-2A
100K
Max
tRAS
tRAS
tRAS
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
10
12
9
9
9
8
9
9
9
8
- 15 -
3tCK+
Min
200
7.8
tIS
13
15
9
4
2
4
3
3
3
2
1
2
7
tRCDRD tRCDWR
tRCDRD tRCDWR
tRCDRD tRCDWR
-33
6
5
4
4
4
4
4
4
4
4
100K
Max
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
3tCK+
Min
200
7.8
13
15
tIS
9
4
2
4
3
3
3
2
1
2
7
4
3
2
2
2
2
2
2
2
2
-36
100K
Max
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
128M GDDR SDRAM
tRP
tRP
tRP
3tCK+
5
4
4
4
4
4
4
4
4
Min
5
200
7.8
tIS
13
15
9
4
2
4
3
3
3
2
1
2
7
-40
100K
Max
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
tRRD
tRRD
tRRD
Rev 1.7 (Nov. 2003)
4
4
3
3
3
3
3
3
3
3
3tCK+
Min
200
7.8
12
14
tIS
8
4
2
4
3
3
3
2
1
2
7
(Unit : Number of Clock)
-45
tDAL
tDAL
tDAL
100K
Max
8
8
7
7
7
7
7
7
7
7
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Unit
tCK
tCK
tCK
tCK
tCK
tCK
tCK
tCK
tCK
tCK
tCK
tCK
tCK
tCK
ns
us
Unit
Unit
tCK
tCK
tCK
tCK
tCK
Unit
tCK
tCK
tCK
tCK
tCK
Note
1
1
1