參數(shù)資料
型號: W3EG72126S265JD3SG
廠商: MICROSEMI CORP-PMG MICROELECTRONICS
元件分類: DRAM
英文描述: 128M X 72 DDR DRAM MODULE, 0.75 ns, DMA184
封裝: ROHS COMPLIANT, DIMM-184
文件頁數(shù): 15/15頁
文件大?。?/td> 263K
代理商: W3EG72126S265JD3SG
White Electronic
W3EG72126S-D3
-JD3
-AJD3
9
White Electronic Designs Corporation (602) 437-1520 www.whiteedc.com
November 2004
Rev. 3
PRELIMINARY
DDR SDRAM COMPONENT ELECTRICAL CHARACTERISTICS AND
RECOMMENDED AC OPERATING CONDITIONS (continued)
0°C ≤ TA ≤ +70°C; VCC = +2.5V ±0.2V, VCCQ = +2.5V ±0.2V
AC Characteristics
335
262
263/265
202
Parameter
Symbol
Min
Max
Min
Max
Min
Max
Min
Max
Units
Notes
ACTIVE to READ or WRITE delay
tRCD
15
ns
PRECHARGE command period
tRP
15
ns
DQS read preamble
tRPRE
0.9
1.1
0.9
1.1
0.9
1.1
0.9
1.1
tCK
19
DQS read postamble
tRPST
0.4
0.6
0.4
0.6
0.4
0.6
0.4
0.6
tCK
ACTIVE bank a to ACTIVE bank b command
tRRD
12
15
ns
DQS write preamble
tWPRE
0.25
tCK
DQS write preamble setup time
tWPRES
0000
ns
10,11
DQS write postamble
tWPST
0.4
0.6
0.4
0.6
0.4
0.6
0.4
0.6
tCK
9
Write recovery time
tWR
15
ns
Internal WRITE to READ command delay
tWTR
1111
tCK
Data valid output window
NA
tQH-tDQSQ
ns
13
REFRESH to REFRESH command interval
tREFC
70.3
μs12
Average periodic refresh interval
tREFI
7.8
μs12
Terminating voltage delay to VCC
tVTD
0000
ns
Exit SELF REFRESH to non-READ command
tXSNR
75
ns
Exit SELF REFRESH to READ command
tXSRD
200
tCK
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