1
White Electronic Designs Corporation (508) 366-5151 www.whiteedc.com
June 2003 Rev. 1
ECO #16358
WED3DG7268V-D1
White Electronic Designs Corp reserves the right to change products or specifications without notice.
512MB- 64Mx72 SDRAM UNBUFFERED
n Burst Mode Operation
n Auto and Self Refresh capability
n LVTTL compatible inputs and outputs
n Serial Presence Detect with EEPROM
n Fully synchronous: All signals are registered on the positive
edge of the system clock
n Programmable Burst Lengths: 1, 2, 4, 8 or Full Page
n 3.3 volt 6 0.3v Power Supply
n 144 Pin SO-DIMM JEDEC
The WED3DG7268V is a 64Mx72 synchronous DRAM module
which consists of nine 64Mx8 SDRAM components in TSOP- 11
package, and one 2K EEPROM in an 8- pin TSSOP package for
Serial Presence Detect which are mounted on a 144 Pin SO-
DIMM multilayer FR4 Substrate.
DESCRIPTION
FEATURES
PIN CONFIGURATIONS (FRONT SIDE/BACK SIDE)
PIN NAMES
A0 A12
Address input (Multiplexed)
BA0-1
Select Bank
DQ0-63
Data Input/Output
CB0-7
Check bit (Data-in/data-out)
CLK0,CLK1
Clock input
CKE0
Clock Enable input
CS0
Chip select Input
RAS
Row Address Strobe
CAS
Column Address Strobe
WE
Write Enable
DQMB0-7
DQM
VDD
Power Supply (3.3V)
VSS
Ground
SDA
Serial data I/O
SCL
Serial clock
DNU
Do not use
NC
No Connect
CLK0
CLK0
NC
NC
NC
CLK1
2
White Electronic Designs Corporation (508) 366-5151 www.whiteedc.com
June 2003 Rev. 1
ECO #16358
WED3DG7268V-D1
White Electronic Designs Corp reserves the right to change products or specifications without notice.
FUNCTIONAL BLOCK DIAGRAM
DQMB0
WE
DQ0
DQ1
DQ2
DQ3
DQ4
DQ5
DQ6
DQ7
D0
S
DQM
WE
DQ15
DQ14
DQ13
DQ12
DQ11
DQ10
DQ9
DQ8
WE
DQM
D1
S
DQ23
DQ22
DQ21
DQ20
DQ19
DQ18
DQ17
DQ16
WE
DQM
D2
S
WE
DQM
D3
S
DQ31
DQ30
DQ29
DQ28
DQ27
DQ26
DQ25
DQ24
WE
DQM
D4
S
DQ62
DQ63
DQ61
DQ60
DQ59
DQ58
DQ57
DQ56
D8
DQ47
DQ51
DQ55
DQ54
DQ53
DQ52
DQ49
DQ50
DQ48
DQ43
DQ45
DQ46
DQ44
DQ41
DQ42
DQ40
DQ39
DQ37
DQ38
DQ35
DQ36
DQ33
DQ34
DQ32
D5
WE
WE
DQM
S
DQM
S
D7
WE
S
DQM
D6
WE
DQM
S
S0
DQMB1
DQMB2
DQMB3
DQMB7
DQMB6
DQMB5
DQMB4
I/O 0
I/O 1
I/O 2
I/O 3
I/O 4
I/O 5
I/O 6
I/O 7
I/O 3
I/O 7
I/O 6
I/O 5
I/O 4
I/O 2
I/O 1
I/O 0
I/O 3
I/O 7
I/O 6
I/O 5
I/O 4
I/O 2
I/O 1
I/O 0
I/O 3
I/O 7
I/O 6
I/O 5
I/O 4
I/O 2
I/O 1
I/O 0
I/O 3
I/O 7
I/O 6
I/O 5
I/O 4
I/O 2
I/O 1
I/O 0
I/O 3
I/O 7
I/O 6
I/O 5
I/O 4
I/O 2
I/O 1
I/O 0
I/O 7
I/O 0
I/O 1
I/O 2
I/O 4
I/O 5
I/O 6
I/O 3
I/O 3
I/O 4
I/O 5
I/O 6
I/O 7
I/O 0
I/O 1
I/O 2
I/O 0
I/O 1
I/O 2
I/O 4
I/O 5
I/O 6
I/O 7
I/O 3
CB3
CB6
CB7
CB4
CB5
CB1
CB2
CB0
NOTE: DQ wiring may differ than described in this drawing,
however DQ/DQMB/CKE/S relationships must be
maintained as shown.
VSS
A0
CAS
RAS
CKE0
VDD
CKE: SDRAM D0-D8
CAS: SDRAM D0-D8
RAS: SDRAM D0-D8
SCL
SDA
A2
A1
SERIAL PD
A0-A12: SDRAM D0-D8
A0-A12
BA0-BA1
BA0-BA1: SDRAM D0-D8
D0-D8
D0-D8
*CLOCK WIRING
CLOCK
INPUT
SDRAMS
*CLK0
*CLK1
4 OR 5 SDRAMS
4 OR 5 SDRAMS
*Wire per Clock Loading Table/Wiring Diagrams
3
White Electronic Designs Corporation (508) 366-5151 www.whiteedc.com
June 2003 Rev. 1
ECO #16358
WED3DG7268V-D1
White Electronic Designs Corp reserves the right to change products or specifications without notice.
(Voltage Referenced to: V
SS
= 0V, T
A
= 0C to +70C)
ABSOLUTE MAXIMUM RATINGS
Parameter
Symbol
Value
Units
Voltage on any pin relative to VSS
V
IN
, Vout
-1.0 ~ 4.6
V
Voltage on VDD supply relative to VSS
VDD, VDDQ
-1.0 ~ 4.6
V
Storage Temperature
TSTG
-55 ~ +150 C
Power Dissipation
PD
9
W
Short Circuit Current
IOS
50
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.
RECOMMENDED DC OPERATING CONDITIONS
Parameter
Symbol
Min
Typ
Max
Unit
Note
Supply Voltage
VDD
3.0
3.3
3.6
V
Input High Voltage
VIH
2.0
3.0 VDDQ+0.3 V
1
Input Low Voltage
VIL
-0.3
0.8
V
2
Output High Voltage
VOH
2.4
V
IOH= -2mA
Output Low Voltage
VOL
0.4
V
IOL= -2mA
Input Leakage Current
ILI
-10
10
A
3
Note: 1. VIH (max)= 5.6V AC. The overshoot voltage duration is 3ns.
2. VIL (min)= -2.0V AC. The undershoot voltage duration is 3ns.
3. Any input 0V VIN VDDQ
Input leakage currents include Hi-Z output leakage for all bi-directional buffers with Tri-State
outputs.
CAPACITANCE
(T
A
= 23C, f = 1MHz, V
DD
= 3.3V, VREF=1.4V 6200mV)
Parameter
Symbol
Min
Max
Unit
Input Capacitance (A0-A12)
CIN1
-
15
pF
Input Capacitance (RAS,CAS,WE)
CIN2
-
15
pF
Input Capacitance (CKE0)
CIN3
-
15
pF
Input Capacitance (CLK0)
CIN4
-
20
pF
Input Capacitance (CS0)
CIN5
-
15
pF
Input Capacitance (DQM0-DQM7)
CIN6
-
15
pF
Input Capacitance (BA0-BA1)
CIN7
-
15
pF
Data input/output capacitance (DQ0-DQ63)
Cout
-
22
pF
Data input/output capacitance (CB0-CB7)
Cout1
-
22
pF
4
White Electronic Designs Corporation (508) 366-5151 www.whiteedc.com
June 2003 Rev. 1
ECO #16358
WED3DG7268V-D1
White Electronic Designs Corp reserves the right to change products or specifications without notice.
OPERATING CURRENT CHARACTERISTICS
(V
CC
= 3.3V, T
A
= 0C to +70C)
Notes: 1. Measured with outputs open.
2. Refresh period is 64ms.
3. Unless otherwise noticed, input swing level is CMOS (VIH/VIL = VDDQ/VssQ)
Version
Parameter
Symbol
Conditions
133
100
Units Note
Operating Current
ICC1
Burst Length = 1
1,800
1,620
mA
1
(One bank active)
tRC tRC(min)
IOL = 0mA
Precharge Standby Current
ICC2P
CKE VIL(max), tCC = 10ns
55
mA
in Power Down Mode
ICC2PS
CKE & CLK VIL(max), tCC =
45
Icc2N
CKE VIH(min), CS VIH(min), tcc = 10ns
Precharge Standby Current
Input signals are charged one time during 20
270
in Non-Power Down Mode
Icc2NS
CKE VIH(min), CLK VIL(max), tcc =
mA
Input signals are stable
90
Active standby current in
ICC3P
CKE VIL(max), tCC = 10ns
90
mA
power-down mode
ICC3PS
CKE & CLK VIL(max), tcc =
75
ICC3N
CKE VIH(min), CS VIH(min), tcc = 10ns
Active standby current in
Input signals are changed one time during 20ns 450
mA
non power-down mode
ICC3NS
CKE VIH(min), CLK VIL(max), tcc =
input signals are stable
315
mA
Io = mA
Operating current (Burst mode)
ICC4
Page burst
1,800
1,530
mA
1
4 Banks activated
tCCD = 2CLK
Refresh current
ICC5
tRC tRC(min)
2,970
2,790
mA
2
Self refresh current
ICC6
CKE 0.2V
65
mA
5
White Electronic Designs Corporation (508) 366-5151 www.whiteedc.com
June 2003 Rev. 1
ECO #16358
WED3DG7268V-D1
White Electronic Designs Corp reserves the right to change products or specifications without notice.
ALL DIMENSIONS ARE IN INCHES
PACKAGE DIMENSIONS
ORDERING INFORMATION
Speed
CAS Latency
WED3DG7268V10D1
100MHz
CL=2
WED3DG7268V7D1
133MHz
CL=2
WED3DG7268V75D1
133MHz
CL=3
Note: For industrial temperature range product, add an "I" to the end of the part
number.
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