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EBE25UC8AAFA Datasheet(PDF) 6 Page - Elpida Memory

Part # EBE25UC8AAFA
Description  256MB Unbuffered DDR2 SDRAM DIMM
Download  22 Pages
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Manufacturer  ELPIDA [Elpida Memory]
Direct Link  http://www.elpida.com/en
Logo ELPIDA - Elpida Memory

EBE25UC8AAFA Datasheet(HTML) 6 Page - Elpida Memory

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EBE25UC8AAFA
Preliminary Data Sheet E0465E10 (Ver. 1.0)
6
Byte No.
Function described
Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 Hex value
Comments
27
Minimum row precharge time (tRP)
-5C, -4A
0
0
1
1
1
1
0
0
3CH
15ns
-4C
0
1
0
1
0
0
0
0
50H
20ns
28
Minimum row active to row active
delay (tRRD)
0
0
0
1
1
1
1
0
1EH
7.5ns
29
Minimum /RAS to /CAS delay (tRCD)
-5C, -4A
0
0
1
1
1
1
0
0
3CH
15ns
-4C
0
1
0
1
0
0
0
0
50H
20ns
30
Minimum active to precharge time
(tRAS)
0
0
1
0
1
1
0
1
2DH
45ns
31
Module rank density
0
1
0
0
0
0
0
0
40H
256M bytes
32
Address and command setup time
before clock (tIS)
-5C
0
0
1
0
0
1
0
1
25H
0.25ns*
1
-4A, -4C
0
0
1
1
0
1
0
1
35H
0.35ns*
1
33
Address and command hold time after
clock (tIH)
-5C
0
0
1
1
1
0
0
0
38H
0.38ns*
1
-4A, -4C
0
1
0
0
1
0
0
0
48H
0.48ns*
1
34
Data input setup time before clock
(tDS)
-5C
0
0
0
1
0
0
0
0
10H
0.10ns*
1
-4A, -4C
0
0
0
1
0
1
0
1
15H
0.15ns*
1
35
Data input hold time after clock (tDH)
-5C
0
0
1
0
0
0
1
1
23H
0.23ns*
1
-4A, -4C
0
0
1
0
1
0
0
0
28H
0.28ns*
1
36
Write recovery time (tWR)
0
0
1
1
1
1
0
0
3CH
15ns*
1
37
Internal write to read command delay
(tWTR)
-5C
0
0
0
1
1
1
1
0
1EH
7.5ns*
1
-4A, -4C
0
0
1
0
1
0
0
0
28H
10ns*
1
38
Internal read to precharge command
delay (tRTP)
0
0
0
1
1
1
1
0
1EH
7.5ns*
1
39
Memory analysis probe characteristics 0
0
0
0
0
0
0
0
00H
TBD
40
Extension of Byte 41 and 42
0
0
0
0
0
0
0
0
00H
Undefined
41
Active command period (tRC)
-5C, -4A,
0
0
1
1
1
1
0
0
3CH
60ns*
1
-4C
0
1
0
0
0
0
0
1
41H
65ns*
1
42
Auto refresh to active/
Auto refresh command cycle (tRFC)
0
1
0
0
1
0
1
1
4BH
75ns*
1
43
SDRAM tCK cycle max. (tCK max.)
1
0
0
0
0
0
0
0
80H
8ns*
1
44
Dout to DQS skew
-5C
0
0
0
1
1
1
1
0
1EH
0.30ns*
1
-4A, -4C
0
0
1
0
0
0
1
1
23H
0.35ns*
1
45
Data hold skew (tQHS)
-5C
0
0
1
0
1
0
0
0
28H
0.40ns*
1
-4A, -4C
0
0
1
0
1
1
0
1
2DH
0.45ns*
1
46
PLL relock time
0
0
0
0
0
0
0
0
00H
Undefined
47 to 61
0
0
0
0
0
0
0
0
00H


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