WED3EG7233S-D3 데이터 시트보기 (PDF) - White Electronic Designs Corporation
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WED3EG7233S-D3 Datasheet PDF : 11 Pages
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White Electronic Designs
WED3EG7233S-D3
-JD3
ADVANCED
DDR SDRAM COMPONENT ELECTRICAL CHARACTERISTICS AND
RECOMMENDED AC OPERATING CONDITIONS
0°C ≤ TA ≤ +70°C; VCC = +2.5V ± 0.2V, VCCQ = +2.5V ± 0.2V
AC Characteristics
262
265, 202
Parameter
Symbol
Min
Max
Min
Max
Units
Access window of DQs from CK, CK#
tAC
-0.75
+0.75
-0.75
+0.75
ns
CK high-level width
tCH
0.45
0.55
0.45
0.55
tCK
CK low-level width
tCL
0.45
0.55
0.45
0.55
tCK
Clock cycle time
CL=2.5 tCK (2.5)
7.5
13
7.5
13
ns
CL=2
tCK (2)
7.5
13
10
13
ns
DQ and DM input hold time relative to DQS
tDH
0.5
0.5
ns
DQ and DM input setup time relative to DQS
tDS
0.5
0.5
ns
DQ and DM input pulse width (for each input)
tDIPW
1.75
1.75
ns
Access window of DQS from CK, CK#
tDQSCK
-0.75
+0.75
-0.75
+0.75
ns
DQS input high pulse width
tDQSH
0.35
0.35
tCK
DQS input low pulse width
tDQSL
0.35
0.35
tCK
DQS-DQ skew, DQS to last DQ valid, per group,
tDQSQ
0.5
per access
0.5
ns
Write command to first DQS latching transition
DQS falling edge to CK rising - setup time
DQS falling edge from CK rising - hold time
Half clock period
Data-out high-impedance window from CK, CK#
Data-out low-impedance window from CK, CK#
Address and control input hold time (fast slew rate)
Address and control input set-up time (fast slew rate)
Address and control input hold time (slow slew rate)
Address and control input setup time (slow slew rate)
Address and control input pulse width (for each input)
LOAD MODE REGISTER command cycle time
DQ-DQS hold, DQS to first DQ to go non-valid, per access
Data hold skew factor
ACTIVE to PRECHARGE command
ACTIVE to READ with Auto precharge command
ACTIVE to ACTIVE/AUTO REFRESH command period
AUTO REFRESH command period
tDQSS
0.75
1.25
0.75
1.25
tCK
tDSS
0.2
0.2
tCK
tDSH
0.2
0.2
tCK
tHP
tCH, tCL
tCH, tCL
ns
tHZ
+0.75
+0.75
ns
tLZ
-0.75
-0.75
ns
tIHf
0.90
0.90
ns
tISf
0.90
0.90
ns
tIHs
1
1
ns
tISs
1
1
ns
tIPW
2.2
2.2
ns
tMRD
15
15
ns
tQH
tHP-tQHS
tHP-tQHS
ns
tQHS
0.75
0.75
ns
tRAS
45
120,000
45
120,000
ns
tRAP
20
20
ns
tRC
65
65
ns
tRFC
75
75
ns
Notes
16
16
22
22
14,17
14,17
17
13,14
18
8,19
8,20
6
6
6
6
13,14
15
21
White Electronic Designs Corp. reserves the right to change products or specifications without notice.
May, 2005
Rev. 0
7
White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com
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