k4d553238f-jc Samsung Semiconductor, Inc., k4d553238f-jc Datasheet - Page 16

• Manufacturer Part Number: k4d553238f-jc
• Description: 256mbit Gddr Sdram
• Manufacturer: Samsung Semiconductor, Inc.

COMMAND
K4D553238F-JC36
K4D553238F-JC40
K4D553238F-JC50
Simplified Timing(2) @ BL=4
(A0~A7,
A9,A10)
BA[1:0]
CK, CK
275MHz ( 3.6ns )
250MHz ( 4.0ns )
200MHz ( 5.0ns )
250MHz ( 4.0ns )
200MHz ( 5.0ns )
A8/AP
K4D553238F-JC
200MHz ( 5.0ns )
ADDR
DQS
WE
DQ
DM
Frequency
Frequency
ACTIVEA
Frequency
BAa
Ra
Ra
Ra
0
1
tRCD
2
Normal Write Burst
WRITEA
Cas Latency
Cas Latency
Cas Latency
BAa
Ca
3
(@ BL=4)
tRAS
4
3
3
3
3
3
Da0 Da1 Da2 Da3
4
5
tRC
tRC
tRC
tRC
16
13
12
13
12
12
6
7
PRECH
tRFC
tRFC
tRFC
BAa
17
15
14
15
14
14
8
9
tRP
tRAS
tRAS
tRAS
11
9
8
9
8
8
10
- 16 -
ACTIVEA
BAa
Ra
Multi Bank Interleaving Write Burst
Ra
11
tRCDRD tRCDWR
tRCDRD tRCDWR
tRCDRD tRCDWR
tRRD
4
4
4
4
4
12
4
ACTIVEB WRITEA
Rb
Rb
BAb
(@ BL=4)
13
Ca
BAa
14
2
2
2
2
2
2
Da0 Da1 Da2 Da3
15
WRITEB
Cb
BAb
256M GDDR SDRAM
tRP
tRP
tRP
16
5
4
4
4
4
4
Db0 Db1
17
Db2
tRRD
tRRD
tRRD
Rev 1.0 (Mar. 2004)
Db3
18
3
3
3
3
3
3
19
tDAL
tDAL
tDAL
20
9
7
7
7
7
7
21
Unit
Unit
tCK
tCK
tCK
tCK
tCK
Unit
tCK
22