W3EG264M64EFSU-D4 Datasheet, PDF (6/11 Pages) White Electronic Designs Corporation – 1GB - 2x64Mx64 DDR SDRAM, UNBUFFERED, FBGA

White Electronic Designs ^{W3EG264M64EFSU-D4}
ADVANCED
DDR SDRAM COMPONENT ELECTRICAL CHARACTERISTICS AND RECOMMENDED AC
OPERATING CONDITIONS
0°C ≤ TA ≤ +70°C; VCC = VCCQ = +2.5V ±0.2V
AC CHARACTERISTICS
403
335
262
265
PARAMETER
SYMBOL
Access window of DQs from CK/CK#
tAC
CK high-level width
tCH
CK low-level width
tCL
Clock cycle time
CL = 3 tCK (3)
CL = 2.5 tCK (2.5)
CL = 2 tCK (2)
DQ and DM input hold time relative to DQS
tDH
DQ and DM input setup time relative to DQS
tDS
DQ and DM input pulse width (for each input)
tDIPW
Access window of DQS from CK/CK#
tDQSCK
DQS input high pulse width
tDQSH
DQS input low pulse width
tDQSL
DQS-DQ skew, DQS to last DQ valid, per group, per tDQSQ
access
Write command to first DQS latching transition
tDQSS
DQS falling edge to CK rising - setup time
tDSS
DQS falling edge from CK rising - hold time
tDSH
Half clock period
tHP
Data-out high-impedance window from CK/CK#
tHZ
Data-out low-impedance window from CK/CK#
tLZ
Address and control input hold time (fast slew rate)
tIHF
Address and control input setup time (fast slew rate)
tISF
Address and control input hold time (slow slew rate)
tIHS
MIN MAX
-0.65 +0.65
0.45 0.55
0.45 0.55
5
10
0.40
0.40
1.75
-0.55 +0.55
0.35
0.35
0.4
0.72 1.25
0.20
0.20
tCH,tCL
+0.65
-0.65 +0.65
0.60
0.60
0.8
MIN MAX
-0.70 +0.70
0.45 0.55
0.45 0.55
6
13
7.5 13
0.45
0.45
1.75
-0.60 +0.60
0.35
0.35
0.4
0.75 1.25
0.20
0.20
tCH,tCL
+0.70
-0.70
0.75
0.75
0.8
MIN MAX MIN MAX UNITS NOTES
-0.75 +0.75 -0.75 0.75 ns
0.45 0.55 0.45 0.55 tCK 26
0.45 0.55 0.45 0.55 tCK 26
ns 39, 44
7.5 13 7.5 13 ns 39, 44
7.5 13 7.5/10 13 ns 39, 44
0.5
0.5
ns 23, 27
0.5
0.5
ns 23, 27
1.75
1.75
ns 27
-0.75 +0.75 -0.75 +0.75 ns
0.35
0.35
tCK
0.35
0.35
tCK
0.5
0.5 ns 22, 23
0.75 1.25 0.75 1.25 tCK
0.20
0.2
tCK
0.20
0.2
tCK
tCH,tCL
tCH, tCL
ns 30
+0.75
+0.75 ns 16, 36
-0.75
-0.75
ns 16, 36
0.90
0.90
ns 12
0.90
0.90
ns 12
1
1
ns 12
August 2005
Rev. 0
6
White Electronic Designs Corporation • [phone] • www.wedc.com