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WV3HG64M64EEU403D4IMG датащи(PDF) 8 Page - White Electronic Designs Corporation

номер детали WV3HG64M64EEU403D4IMG
подробное описание детали  512MB - 64Mx64 DDR2 SDRAM UNBUFFERED, SO-DIMM
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производитель  WEDC [White Electronic Designs Corporation]
домашняя страница  http://www.whiteedc.com
Logo WEDC - White Electronic Designs Corporation

WV3HG64M64EEU403D4IMG датащи(HTML) 8 Page - White Electronic Designs Corporation

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WV3HG64M64EEU-D4
May 2006
Rev. 2
ADVANCED
8
White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com
White Electronic Designs
AC TIMING PARAMETERS (cont'd)
AC CHARACTERISTICS
665
534
403
PARAMETER
SYMBOL
MIN
MAX
MIN
MAX
MIN
MAX
UNIT
ACTIVE to ACTIVE (same bank) command
tRC
55
60
65
ns
ACTIVE bank a to ACTIVE bank b command
tRRD
7.5
7.5
7.5
ns
ACTIVE to READ or WRITE delay
tRCD
15
15
15
ns
Four Bank Activate period
tFAW
37.5
37.5
37.5
37.5
37.5
37.5
ns
ACTIVE to PRECHARGE command
tRAS
45
70,000
45
70,000
45
70,000
ns
Internal READ to precharge command delay
tRTP
7.5
7.5
7.5
ns
Write recovery time
tWR
15
15
15
ns
Auto precharge write recovery + precharge time
tDAL
tWR + tRP
tWR + tRP
tWR + tRP
ns
Internal WRITE to READ command delay
tWTR
7.5
7.5
10
ns
PRECHARGE command period
tRP
15
15
15
ns
PRECHARGE ALL command period
tRPA
tRP+tCK
tRP+tCK
tRP+tCK
ns
LOAD MODE command cycle time
tMRD
222
tCK
CKE low to CK,CK# uncertainty
tDELAY
tIS + tCK
+ tIH
tIS + tCK
+ tIH
tIS + tCK
+ tIH
ns
REFRESH to Active of Refresh to Refresh command
interfal
tRFC
105
70,000
105
70,000
105
70,000
ns
Average periodic refresh interval
tREFI
7.8
7.8
7.8
µs
Exit self refresh to non-READ command
tXSNR
tRFC (MIN)
+ 10
tRFC (MIN)
+ 10
tRFC (MIN)
+ 10
ns
Exit self refresh to READ command
tXSRD
200
200
200
tCK
Exit self refresh timing reference
tISXR
tIS
tIS
tIS
ps
ODT turn-on delay
tAOND
222222
tCK
ODT turn-on
tAON
tAC (MIN)
tAC (MAX)
+ 1000
tAC (MIN)
tAC (MAX)
+ 1000
tAC (MIN)
tAC (MAX)
+ 1000
ps
ODT turn-off delay
tAOFD
2.5
2.5
2.5
2.5
2.5
2.5
tCK
ODT turn-off
tAOF
tAC (MIN)
tAC (MAX)
+ 600
tAC (MIN)
tAC (MAX)
+ 600
tAC (MIN)
tAC (MAX)
+ 600
ps
ODT turn-on (power-down mode)
tAONPD
tAC (MIN)
+ 2000
2 x tCK +
tAC (MAX)
+ 1000
tAC (MIN)
+ 2000
2 x tCK +
tAC (MAX)
+ 1000
tAC (MIN)
+ 2000
2 x tCK +
tAC (MAX)
+ 1000
ps
ODT turn-off (power-down mode)
tAOFPD
tAC (MIN)
+ 2000
2.5 x
tCK + tAC
(MAX) +
1000
tAC (MIN)
+ 2000
2.5 x
tCK + tAC
(MAX) +
1000
tAC (MIN)
+ 2000
2.5 x
tCK + tAC
(MAX) +
1000
ps
ODT to power-down entry latency
tANPD
333
tCK
ODT power-down exit latency
tAXPD
888
tCK
Exit active power-down to READ command,
MR[bit12=0]
tXARD
222
tCK
Exit active power-down to READ command,
MR[bit12=1]
tXARDS
7 - AL
6 - AL
6 - AL
tCK
A Exit precharge power-down to any non-READ
command.
tXP
222
tCK
CKE minimum high/low time
tCKE
333
tCK
Note:
AC specification is based on SAMSUNG components. Other DRAM manufactures specification may be different.


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