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HB54A2568FM-10B Datasheet(PDF) 6 Page - Elpida Memory

Part # HB54A2568FM-10B
Description  256MB Unbuffered DDR SDRAM DIMM
Download  17 Pages
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Manufacturer  ELPIDA [Elpida Memory]
Direct Link  http://www.elpida.com/en
Logo ELPIDA - Elpida Memory

HB54A2568FM-10B Datasheet(HTML) 6 Page - Elpida Memory

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HB54A2568FM, HB54A2569FM-A75B/B75B/10B
Data Sheet E0088H40 (Ver. 4.0)
6
Byte No.
Function described
Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 Hex value
Comments
25
Minimum clock cycle time at
CLX - 1
0
0
0
0
0
0
0
0
00
26
Maximum data access time (tAC) from
clock at CLX - 1
0
0
0
0
0
0
0
0
00
27
Minimum row precharge time (tRP)
0
1
0
1
0
0
0
0
50
20ns
28
Minimum row active to row active
delay (tRRD)
0
0
1
1
1
1
0
0
3C
15ns
29
Minimum /RAS to /CAS delay (tRCD)
0
1
0
1
0
0
0
0
50
20ns
30
Minimum active to precharge time
(tRAS)
-A75B/B75B
0
0
1
0
1
1
0
1
2D
45ns
-10B
0
0
1
1
0
0
1
0
32
50ns
31
Module bank density
0
1
0
0
0
0
0
0
40
1 bank
256MB
32
Address and command setup time
before clock (tIS)
-A75B/B75B
1
0
0
1
0
0
0
0
90
0.9ns*
5
-10B
1
0
1
1
0
0
0
0
B0
1.1ns*
5
33
Address and command hold time after
clock (tIH)
-A75B/B75B
1
0
0
1
0
0
0
0
90
0.9ns*
5
-10B
1
0
1
1
0
0
0
0
B0
1.1ns*
5
34
Data input setup time before clock
(tDS)
-A75B/B75B
0
1
0
1
0
0
0
0
50
0.5ns*
5
-10B
0
1
1
0
0
0
0
0
60
0.6ns*
5
35
Data input hold time after clock (tDH)
-A75B/B75B
0
1
0
1
0
0
0
0
50
0.5ns*
5
-10B
0
1
1
0
0
0
0
0
60
0.6ns*
5
36 to 40
Superset information
0
0
0
0
0
0
0
0
00
Future use
41
Active command period (tRC)
-A75B/B75B
0
1
0
0
0
0
0
1
41
65ns*
5
-10B
0
1
0
0
0
1
1
0
46
70ns*
5
42
Auto refresh to active/
Auto refresh command cycle (tRFC)
-A75B/B75B
0
1
0
0
1
0
1
1
4B
75ns*
5
-10B
0
1
0
1
0
0
0
0
50
80ns*
5
43
SDRAM tCK cycle max. (tCK max.)
0
0
1
1
0
0
0
0
30
12ns*
5
44
Dout to DQS skew
-A75B/B75B
0
0
1
1
0
0
1
0
32
500ps*
5
-10B
0
0
1
1
1
1
0
0
3C
600ps*
5
45
Data hold skew (tQHS)
-A75B/B75B
0
1
1
1
0
1
0
1
75
750ps*
5
-10B
1
0
1
0
0
0
0
0
A0
1000ps*
5
46 to 61
Superset information
0
0
0
0
0
0
0
0
00
Future use
62
SPD revision
0
0
0
0
0
0
0
0
00
Initial


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