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EBD25UC8AJFA-7B Datasheet(PDF) 8 Page - Elpida Memory

Part # EBD25UC8AJFA-7B
Description  256MB Unbuffered DDR SDRAM DIMM
Download  19 Pages
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Manufacturer  ELPIDA [Elpida Memory]
Direct Link  http://www.elpida.com/en
Logo ELPIDA - Elpida Memory

EBD25UC8AJFA-7B Datasheet(HTML) 8 Page - Elpida Memory

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EBD10RD4ABFA
Preliminary Data Sheet E0274E40 (Ver. 4.0)
8
Block Diagram
DQ
DQS
DM
DQ0 to DQ3
4
DQS0
RS
RS
/CS
D0
/RCS0
VSS
DQ
DQ8 to DQ11
4
DQS1
RS
RS
D1
DQ
DQ16 to DQ19
4
DQS2
RS
RS
D2
DQ
DQ24 to DQ27
4
DQS3
RS
RS
D3
DQ
DQ32 to DQ35
4
DQS4
RS
RS
D4
DQ
DQ40 to DQ43
4
DQS5
RS
RS
D5
DQ
DQ48 to DQ51
4
DQS6
RS
RS
D6
DQ
DQ56 to DQ59
4
DQS7
RS
RS
D7
DQ
CB0 to CB3
4
DQS8
RS
RS
D8
DQS
DM
/CS
DQS
DM
/CS
DQS
DM
/CS
DQS
DM
/CS
DQS
DM
/CS
DQS
DM
/CS
DQS
DM
/CS
DQS
DM
/CS
DQ
DQS
DM
DQ4 to DQ7
4
DM0/DQS9
RS
RS
/CS
D9
DQ
DQ12 to DQ15
4
DM1/DQS10
RS
RS
D10
DQ
DQ20 to DQ23
4
DM2/DQS11
RS
RS
D11
DQ
DQ28 to DQ31
4
DM3/DQS12
RS
RS
D12
DQ
DQ36 to DQ39
4
DM4/DQS13
RS
RS
D13
DQ
DQ44 to DQ47
4
DM5/DQS14
RS
RS
D14
DQ
DQ52 to DQ55
4
DM6/DQS15
RS
RS
D15
DQ
DQ60 to DQ63
4
DM7/DQS16
RS
RS
D16
DQ
CB4 to CB7
4
DM8/DQS17
RS
RS
D17
DQS
DM
/CS
DQS
DM
/CS
DQS
DM
/CS
DQS
DM
/CS
DQS
DM
/CS
DQS
DM
/CS
DQS
DM
/CS
DQS
DM
/CS
* D0 to D17: 512M bits DDR SDRAM
U0: 2k bits EEPROM
RS: 22Ω
PLL: CDCV857
Register: SSTV16857
RS
RS
RS
RS
RS
RS
RS
Serial PD
SDA
A0
A1
A2
SA0
SA1
SA2
SCL
SCL
U0
SDA
Notes:
1. The SDA pull-up resistor is required due to
the open-drain/open-collector output.
2. The SCL pull-up resistor is recommended
because of the normal SCL line inacitve
"high" state.
D0 to D17
D0 to D17
D0 to D17
VDD
VSS
VREF
VDDID
open
/CS0
BA0 to BA1
A0 to A12
/RAS
/CAS
CKE0
/WE
/RCS0 -> /CS: SDRAMs D0 to D17
RBA0 to RBA1 -> BA0 to BA1: SDRAMs D0 to D17
RA0 to RA12 -> A0 to A12: SDRAMs D0 to D17
/RRAS -> /RAS: SDRAMs D0 to D17
/RCAS -> /CAS: SDRAMs D0 to D17
RCKE0A -> CKE: SDRAMs D0 to D17
/RWE -> /WE: SDRAMs D0 to D17
R
E
G
I
S
T
E
R
PCK
/PCK
CK0, /CK0
PLL*
/RESET
Note: Wire per Clock loading table/Wiring diagrams.


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