White Electronic Designs
W3EG7235S-JD3
PRELIMINARY*
256MB – 2x16Mx72 DDR SDRAM REGISTERED ECC, w/PLL
FEATURES
Double-data-rate architecture
Speeds of 100MHz and 133MHz
Bi-directional data strobes (DQS)
Differential clock inputs (CK# & CK)
Programmable Read Latency 2,2.5 (clock)
Programmable Burst Length (2,4,8)
Programmable Burst type (sequential & interleave)
Edge aligned data output, center aligned data
input
Auto and self refresh
Serial presence detect
Dual Rank
Power supply: 2.5V ± 0.20V
JEDEC standard 184 pin DIMM package
•
Package height option:
JD3 30.48 mm (1:20")
NOTE: Consult factory for availability of:
• RoHS compliant products
• Vendor source control options
• Industrial temperature option
* This product is under development, is not qualified or characterized and is subject to
change without notice.
DESCRIPTION
The WED3DG7235S is a 2x16Mx72 Double Data Rate
SDRAM memory module based on 128Mb DDR SDRAM
component. The module consists of eighteen 16Mx8 DDR
SDRAMs in 66 pin TSOP packages mounted on a 184 pin
FR4 substrate.
Synchronous design allows precise cycle control with the
use of system clock. Data I/O transactions are possible on
both edges and Burst Lengths allow the same device to be
useful for a variety of high bandwidth, high performance
memory system applications.
OPERATING FREQUENCIES
DDR266 @CL=2
Clock Speed
CL-t
RCD
-t
RP
133MHz
2-2-2
DDR266 @CL=2.5
133MHz
2.5-3-3
DDR200 @CL=2
100MHz
2-2-2
November 2004
Rev. 2
1
White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com
White Electronic Designs
W3EG7235S-JD3
PRELIMINARY
PIN CONFIGURATION
PIN#
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
SYMBOL
V
REF
DQ0
V
SS
DQ1
DQS0
DQ2
V
CC
DQ3
NC
RESET#
V
SS
DQ8
DQ9
DQS1
V
CCQ
*CK1
*CK1#
V
SS
DQ10
DQ11
CKE0
V
CCQ
DQ16
DQ17
DQS2
V
SS
A9
DQ18
A7
V
CCQ
DQ19
A5
DQ24
V
SS
DQ25
DQS3
A4
V
CC
DQ26
DQ27
A2
V
SS
A1
CB0
CB1
V
CC
PIN#
47
48
49
50
51
52
53
54
55
56
57
56
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
SYMBOL
DQS8
A0
CB2
V
SS
CB3
BA1
DQ32
V
CC
Q
DQ33
DQS4
DQ34
V
SS
BA0
DQ35
DQ40
V
CCQ
WE#
DQ41
CAS#
V
SS
DQS5
DQ42
DQ43
V
CC
*CS2#
DQ48
DQ49
V
SS
*CK2#
*CK2
V
CCQ
DQS6
DQ50
DQ51
V
SS
V
CCID
DQ56
DQ57
V
CC
DQS7
DQ58
DQ59
V
SS
NC
SDA
SCL
PIN#
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
SYMBOL
V
SS
DQ4
DQ5
V
CCQ
DQM0
DQ6
DQ7
V
SS
NC
NC
NC
V
CCQ
DQ12
DQ13
DQM1
V
CC
DQ14
DQ15
CKE1
V
CCQ
*BA2
DQ20
A12
V
SS
DQ21
A11
DQM2
V
CC
DQ22
A8
DQ23
V
SS
A6
DQ28
DQ29
V
CCQ
DQM3
A3
DQ30
V
SS
DQ31
CB4
CB5
V
CCQ
CK0
CK0#
PIN#
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
SYMBOL
V
SS
DQM8
A10
CB6
V
CCQ
CB7
V
SS
DQ36
DQ37
V
CC
DQM4
DQ38
DQ39
V
SS
DQ44
RAS#
DQ45
V
CCQ
CS0#
CS1#
DQM5
V
SS
DQ46
DQ47
NC
V
CCQ
DQ52
DQ53
A13*
V
CC
DQM6
DQ54
DQ55
V
CCQ
NC
DQ60
DQ61
V
SS
DQS16
DQ62
DQ63
V
CCQ
SA0
SA1
SA2
V
CCSPD
A0-A12
BA0-BA1
DQ0-DQ63
CB0-CB7
DQS0-DQS8
CK0
CK0#
CKE0, CKE1
CS0#, CS1#
RAS#
CAS#
WE#
DQM0-DQM8
V
CC
V
CCQ
V
SS
V
REF
V
CCSPD
SDA
SCL
SA0-SA2
V
CCID
NC
RESET#
PIN NAMES
Address input (Multiplexed)
Bank Select Address
Data Input/Output
Check bits
Data Strobe Input/Output
Clock Input
Clock input
Clock Enable input
Chip Select Input
Row Address Strobe
Column Address Strobe
Write Enable
Data-In Mask
Power Supply
Power Supply for DQS
Ground
Power Supply for Reference
Serial EEPROM Power Supply
Serial data I/O
Serial clock
Address in EEPROM
V
CC
Indentification Flag
No Connect
Reset Enable
* Not Used
November 2004
Rev. 2
2
White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com
White Electronic Designs
FUNCTIONAL BLOCK DIAGRAM
RCS1#
RCS0#
DQS0
DQM0
DQ0
DQ1
DQ2
DQ3
DQ4
DQ5
DQ6
DQ7
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
DM
7
6
1
0
5
4
3
2
CS#
DQS
DM
I/O 0
I/O 1
I/O 6
I/O 7
I/O 2
I/O 3
I/O 4
I/O 5
CS#
DQS
DQ32
DQ33
DQ34
DQ35
DQ36
DQ37
DQ38
DQ39
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
W3EG7235S-JD3
PRELIMINARY
DQS4
DQM4
DM
7
6
1
0
5
4
3
2
CS#
DQS
DM
I/O 0
I/O 1
I/O 6
I/O 7
I/O 2
I/O 3
I/O 4
I/O 5
CS#
DQS
DQS1
DQM1
DQ8
DQ9
DQ10
DQ11
DQ12
DQ13
DQ14
DQ15
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
DM
7
6
1
0
5
4
3
2
CS#
DQS
DM
I/O 0
I/O 1
I/O 6
I/O 7
I/O 2
I/O 3
I/O 4
I/O 5
CS#
DQS
DQS5
DQM5
DQ40
DQ41
DQ42
DQ43
DQ44
DQ45
DQ46
DQ47
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
DM
7
6
1
0
5
4
3
2
CS#
DQS
DM
I/O 0
I/O 1
I/O 6
I/O 7
I/O 2
I/O 3
I/O 4
I/O 5
CS#
DQS
DQS2
DQM2
DQ16
DQ17
DQ18
DQ19
DQ20
DQ21
DQ22
DQ23
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
DM
7
6
1
0
5
4
3
2
CS#
DQS
DM
I/O 0
I/O 1
I/O 6
I/O 7
I/O 2
I/O 3
I/O 4
I/O 5
CS#
DQS
DQS6
DQM6
DQ48
DQ49
DQ50
DQ51
DQ52
DQ53
DQ54
DQ55
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
DM
7
6
1
0
5
4
3
2
CS#
DQS
DM
I/O 0
I/O 1
I/O 6
I/O 7
I/O 2
I/O 3
I/O 4
I/O 5
CS#
DQS
DQS3
DQM3
DQ24
DQ25
DQ26
DQ27
DQ28
DQ29
DQ30
DQ31
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
DM
7
6
1
0
5
4
3
2
CS#
DQS
DM
I/O 0
I/O 1
I/O 6
I/O 7
I/O 2
I/O 3
I/O 4
I/O 5
CS#
DQS
DQS7
DQM7
DQ56
DQ57
DQ58
DQ59
DQ60
DQ61
DQ62
DQ63
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
DM
7
6
1
0
5
4
3
2
CS#
DQS
DM
I/O 0
I/O 1
I/O 6
I/O 7
I/O 2
I/O 3
I/O 4
I/O 5
CS#
DQS
DQS8
DQM8
CB0
CB1
CB2
CB3
CB4
CB5
CB6
CB7
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
DM
7
6
1
0
5
4
3
2
CS#
DQS
DM
I/O 0
I/O 1
I/O 6
I/O 7
I/O 2
I/O 3
I/O 4
I/O 5
CS#
DQS
120
CK0
CK0#
PLL
SERIAL PD
SCL
WP
BA0-BA1: DDR SDRAMs
A0-A12: DDR SDRAMs
RAS#: DDR SDRAMs
CAS#: DDR SDRAMs
CKE: DDR SDRAMs
CKE: DDR SDRAMs
WE#: DDR SDRAMs
DDR SDRAM
DDR SDRAM
DDR SDRAM
DDR SDRAM
DDR SDRAM
DDR SDRAM
DDR SDRAM
DDR SDRAM
DDR SDRAM
REGISTER X 2
SDA
A0
A1
A2
SA0 SA1 SA2
CS0#
CS1#
BA0-BA1
A0-A12
RAS#
CAS#
CKE0
CKE1
WE#
PCK
PCK#
R
E
G
I
S
T
E
R
RCS0#
RCS1#
RBA0 - RBA1
RA0 - RA12
RRAS#
RCAS#
RCKE0
RCKE1
RWE#
RESET#
V
CCSPD
V
CCQ
V
CC
V
REF
V
SS
SPD
DDR SDRAMS
DDR SDRAMS
DDR SDRAMS
DDR SDRAMS
NOTE: All resistor values are 22 ohms unless otherwise specified
November 2004
Rev. 2
3
White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com
White Electronic Designs
ABSOLUTE MAXIMUM RATINGS
Parameter
Voltage on any pin relative to V
SS
Voltage on V
CC
supply relative to V
SS
Storage Temperature
Power Dissipation
Short Circuit Current
Symbol
V
IN
, V
OUT
V
CC
, V
CCQ
T
STG
P
D
I
OS
Value
-0.5 ~ 3.6
-1.0 ~ 3.6
-55 ~ +150
9
50
W3EG7235S-JD3
PRELIMINARY
Units
V
V
°C
W
mA
Note: Permanent device damage may occur if "ABSOLUTE MAXIMUM RATINGS" are exceeded.
Functional operation should be restricted to recommended operating condition.
Exposure to higher than recommended voltage for extended periods of time could affect device reliability.
DC CHARACTERISTICS
T
A
= 0°C to 70°C, V
CC
= 2.5V ± 0.2V
Parameter
Supply Voltage
Supply Voltage
Reference Voltage
Termination Voltage
Input High Voltage
Input Low Voltage
Output High Voltage
Output Low Voltage
Symbol
V
CC
V
CCQ
V
REF
V
TT
V
IH
V
IL
V
OH
V
OL
Min
2.3
2.3
1.15
1.15
V
REF
+0.15
-0.3
V
TT
+0.76
—
Max
2.7
2.7
1.35
1.35
V
CCQ
+0.3
V
REF
+0.15
—
V
TT
-0.76
Unit
V
V
V
V
V
V
V
V
CAPACITANCE
T
A
= 25°C, f = 1MHz, V
CC
= 2.5V
Parameter
Input Capacitance (A0-A12)
Input Capacitance (RAS#,CAS#,WE#)
Input Capacitance (CKE0)
Input Capacitance (CK0#,CK0)
Input Capacitance (CS0#)
Input Capacitance (DQM0-DQM8)
Input Capacitance (BA0-BA1)
Data input/output capacitance (DQ0-DQ63)(DQS)
Data input/output capacitance (CB0-CB7)
Symbol
C
IN1
C
IN2
C
IN3
C
IN4
C
IN5
C
IN6
C
IN7
C
OUT
C
OUT
Max
6.25
6.25
6.25
5.5
6.25
13
6.25
13
13
Unit
pF
pF
pF
pF
pF
pF
pF
pF
pF
November 2004
Rev. 2
4
White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com
White Electronic Designs
I
DD
SPECIFICATIONS AND TEST CONDITIONS
0°C
≤
T
A
≤
70°C, V
CCQ
= 2.5V ± 0.2V, V
CC
= 2.5V ± 0.2V
Includes PLL and Register Power
DDR266@CL = 2
Max
2475
W3EG7235S-JD3
PRELIMINARY
Parameter
Operating Current
Rank 1
I
DD0
Conditions
One device bank; Active = Precharge; t
RC
= t
RC
(MIN);
t
CK
= t
CK
(MIN); DQ,DM and DQS inputs changing
once per clock cycle; Address and control inputs
changing once every two cycles.
One device bank; Active-Read-Precharge; Burst = 2;
t
RC
= t
RC
(MIN);t
CK
= t
CK
(MIN); Iout = 0mA; Address
and control inputs changing once per clock cycle.
All device banks idle; Power- down mode; t
CK
=
t
CK
(MIN); CKE = (low)
CS# = High; All device banks idle; t
CK
= t
CK
(MIN);
CKE = high; Address and other control inputs
changing once per clock cycle. V
IN
= V
REF
for DQ,
DQS and DM.
One device bank active; Power-down mode;
t
CK
(MIN); CKE = (low)
CS# = High; CKE = High; One device bank; Active-
Precharge; t
RC
= t
RAS
(MAX); t
CK
= t
CK
(MIN); DQ,
DM and DQS inputs changing twice per clock cycle;
Address and other control inputs changing once per
clock cycle.
Burst = 2; Reads; Continuous burst; One device bank
active; Address and control inputs changing once per
clock cycle; t
CK
= t
CK
(MIN); I
OUT
= 0mA.
Burst = 2; Writes; Continous burst; One device bank
active; Address and control inputs changing once per
clock cycle; t
CK
= t
CK
(MIN); DQ,DM and DQS inputs
changing twice per clock cycle.
t
RC
= t
RC
(MIN)
CKE
≤
0.2V
Four bank interleaving Reads (BL = 4) with auto
precharge with t
RC
= t
RC
(MIN); t
CK
= t
CK
(MIN);
Address and control inputs change only during Active
Read or Write commands.
DDR266@CL = 2.5
Max
2340
DDR200@CL = 2
Max
2340
Units
mA
Rank2
Stand By
State
I
DD3N
Operating Current
I
DD1
2565
2475
2475
mA
I
DD3N
Precharge Power-
Down Standby Current
dle Standby Current
I
DD2P
I
DD2F
54
1120
54
1030
54
1030
mA
mA
I
DD2P
I
DD2F
Active Power-Down
Standby Current
Active Standby Current
I
DD3P
I
DD3N
450
1210
360
1120
360
1120
mA
mA
I
DD3P
I
DD3N
Operating Current
I
DD4R
2655
2520
2520
mA
I
DD3N
Operating Current
I
DD4W
2610
2475
2475
mA
I
DD3N
Auto Refresh Current
Self Refresh Current
Operating Current
I
DD5
I
DD6
I
DD7A
3500
329
4455
3410
311
4320
3375
346
4320
mA
mA
mA
I
DD3N
I
DD6
I
DD3N
November 2004
Rev. 2
5
White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com
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