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White Electronic Designs Corporation (508) 366-5151 www.whiteedc.com
EDI8G322048V
A
-A
20
Address Inputs
E
1
-E
4
Chip Enables
W
Write Enable
G
Output Enable
DQ
-DQ
31
Common Data
Input/Output
V
CC
Power (+3.3V10%)
V
SS
Ground
NC
No Connection
Features
n
2048K x 32 bit CMOS Static
n
Random Access Memory
Access Times: 20, 25, and 35ns
Individual Byte Selects
Fully Static, No Clocks
TTL Compatible I/O
n
High Density Package
72 lead SIMM
Common Data Inputs and Outputs
n
Single +3.3V (10%) Supply Operation
The EDI8G322048V is a high speed 64 megabit Static RAM
module organized as 2048K words by 32 bits. This module
is constructed from sixteen 1024K x 4 Static RAMs in SOJ
packages on an epoxy laminate (FR4) board.
Four chip enables (E
-E
3
) and the highest order address line
are used to independently enable the four bytes as well as
the low or high block of addressable memory space. Read-
ing or writing can be executed on individual bytes or any
combination of multiple bytes through proper use of selects.
The EDI8G322048V is offered in a 72 lead SIMM package,
which enables 64 megabits of memory to be placed in less
than 1.3 square inches of board space.
All inputs and outputs are TTL compatible and operate from
a single 3.3V supply. Fully asynchronous circuitry requires
no clocks or refreshing for operation and provides equal
access and cycle times for ease of use.
*Pins PD1- PD4, are used to identify module memory den-
sity in applications where alternate modules can be inter-
changed.
2048K x 32 Static RAM CMOS, High Speed Module
DESCRIPTION
P
IN
N
AMES
PIN CONFIGURATION
February 2002 Rev 0
ECO # 14885
PD
1
PD
2
PD
3
PD
4
Open
V
SS
V
SS
Open
*
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White Electronic Designs Corporation Westborough, MA (508) 366-5151
EDI8G322048V
DQ0-DQ3
DQ4-DQ7
DQ12-DQ15
DQ24-DQ27
DQ28-DQ31
DQ0-DQ3
DQ4-DQ7
DQ8-DQ11
DQ8-DQ11
DQ16-DQ19
DQ20-DQ23
DQ12-DQ15
DQ16-DQ19
DQ20-DQ23
DQ24-DQ27
DQ28-DQ31
G\
A0-A19
W\
A20
E1\
E2\
A20
E3\
E4\
DECODER
DECODER
U1
1Mx4
U3
1Mx4
1Mx4
U9
1Mx4
U2
1Mx4
U4
1Mx4
1Mx4
1Mx4
U5
1Mx4
1Mx4
U7
1Mx4
1Mx4
U8
1Mx4
1Mx4
U6
1Mx4
1Mx4
U14
U16
U13
U15
U10
U12
U11
8G322048C
BLOCK DIAGRAM
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White Electronic Designs Corporation (508) 366-5151 www.whiteedc.com
EDI8G322048V
Parameter
Sym
Conditions
Min
Typ Max Units
Operating Power Supply Current
I
CC
1
W, E = V
IL
, I
I
/
O
= 0mA, Min Cycle
1750 mA
Standby (TTL) Power Supply Current
I
CC
2
E
V
IH
, V
IN
V
IL
or V
IN
V
IH
800
mA
Full Standby Power Supply Current
I
CC
3
E
V
CC
-0.2V
160
mA
CMOS
V
IN
V
CC
-0.2V or V
IN
0.2V
Input Leakage Current
I
LI
V
IN
= 0V to V
CC
--
--
80
A
Output Leakage Current
I
LO
V
I
/
C
= 0V to V
CC
--
--
20
A
Output High Voltage
V
OH
I
OH
= -4.0mA
2.4
--
--
V
Output Low Voltage
V
OL
I
OL
= 8.0mA
--
--
0.4
V
A
BSOLUTE
M
AXIMUM
R
ATINGS
*
R
ECOMMENDED
DC O
PERATING
C
ONDITIONS
DC E
LECTRICAL
C
HARACTERISTICS
C
APACITANCE
(f=1.0MH
Z
, V
IN
=V
CC
OR
V
SS
)
AC T
EST
C
ONDITIONS
*Stress greater than those listed under "Absolute Maximum Ratings" may cause
permanent damage to the device. This is a stress rating only and functional
operation of the device at these or any other conditions greater than those
indicated in the operational sections of this specification is not implied. Exposure
to absolute maximum rating conditions for extended periods may affect reliability.
(NOTE: For t
EHQZ
, t
GHQZ
and t
WLQZ
, CL = 5pF)
*Typical: T
A
= 25C, V
CC
= 3.3V
These parameters are sampled, not 100% tested.
*Each enable controls one byte (x8) within the x32 (doubleword) and one or more byte enables may be driven valid during this operation.
T
RUTH
T
ABLE
Parameter
Sym
Min
Typ
Max
Units
Supply Voltage
V
CC
3.0
3.3
3.6
V
Supply Voltage
V
SS
0
0
0
V
Input High Voltage
V
IH
2.2
--
V
CC
+0.3
V
Input Low Voltage
V
IL
-0.3
--
0.8
V
Input Pulse Levels
V
SS
to 3.0V
Input Rise and Fall Times
3ns
Input and Output Timing Levels
1.5V
Output Load
1TTL, CL = 30pF
Parameter
Sym
Max
Unit
Address Lines
C
I
120
pF
Data Lines
C
D
/
Q
20
pF
Chip Enable Line
C
C
120
pF
Write Line
C
N
120
pF
E1
E2E3
E4
W
G
Operational Comments
H
H
H
H
H
H
Disabled
L
L
L
L
H
L
Read Double Word
L
L
L
L
L
H
Write Double Word
*
*
*
*
L
H
Write One or More Bytes in Double Word
*
*
*
*
H
L
Read One or More Bytes in Double Word
Voltage on any pin relative to V
SS
-0.5V to 4.6V
Operating Temperature T
A
(Ambient)
Commercial
0C to +70C
Storage Temperature, Plastic
-55C to +125C
Power Dissipation
7.0 Watts
Output Current
20 mA
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White Electronic Designs Corporation Westborough, MA (508) 366-5151
EDI8G322048V
AC C
HARACTERISTICS
R
EAD
C
YCLE
Read Cycle 2 - W High
Note 1: Parameter guaranteed, but not tested.
Read Cycle 1 - W High, G, E Low
Symbol
20ns
25ns
35ns
Parameter
JEDEC
Alt.
Min
Max
Min
Max Min
Max Units
Read Cycle Time
t
AVA
t
RC
20
25
35
ns
Address Access Time
t
AVQV
t
AA
20
25
35
ns
Chip Enable Access
t
ELQV
t
ACS
20
25
35
ns
Chip Enable to Output in Low Z
1
t
ELQX
t
CLZ
3
3
3
ns
Chip Disable to Output in High Z
1
t
EHQZ
t
CHZ
15
17
20
ns
Output Hold from Address Change
t
AVQX
t
OH
3
3
3
ns
Output Enable to Output Valid
t
GLQV
t
OE
15
17
20
ns
Output Enable to Output in Low Z
1
t
GLQX
t
OLZ
0
0
0
ns
Output Disable to Output in High Z
1
t
GHQZ
t
OHZ
15
17
20
ns
ADDRESS 1
ADDRESS 2
TAVAV
DATA 1
DATA 2
TAVQV
TAVQX
A
Q
TGHQZ
TELQV
TELQX
E
G
Q
TEHQZ
A
TAVAV
TGLQV
TGLQX
TAVQV
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White Electronic Designs Corporation (508) 366-5151 www.whiteedc.com
EDI8G322048V
Symbol
20ns
25ns
35ns
Parameter
JEDEC
Alt.
Min
Max Min
Max Min Max Units
Write Cycle Time
t
AVAV
t
WC
20
25
35
ns
Chip Enable to End of Write
t
ELWH
t
CW
15
20
25
ns
t
WLEH
t
CW
15
20
25
ns
Address Setup Time
t
AVWL
t
AS
0
0
0
ns
t
AVEL
t
AS
0
0
0
ns
Address Valid to End of Write
t
AVWH
t
AW
15
20
25
ns
t
AVEH
t
AW
15
20
25
ns
Write Pulse Width
t
WLWH
t
WP
15
20
25
ns
t
ELEH
t
WP
15
20
25
ns
Write Recovery Time
t
WHAX
t
WR
0
0
0
ns
t
EHAX
t
WR
0
0
0
ns
Data Hold Time
t
WHDX
t
DH
3
0
0
ns
t
EHDX
t
DH
3
0
0
ns
Write to Output in High Z
1
t
WLQZ
t
WHZ
0
8
0
12
0
15
ns
Data to Write Time
t
DVWH
t
DW
12
15
20
ns
t
DVEH
t
DW
12
15
20
ns
Output Active from End of Write
1
t
WHQX
t
WLZ
3
3
3
ns
Note 1: Parameter guaranteed, but not tested.
Write Cycle 1 - W Controlled
AC C
HARACTERISTICS
W
RITE
C
YCLE
E
A
TAVAV
TELWH
TAVWH
TWLWH
TAVWL
TWHAX
W
HIGH Z
DATA VALID
TWLQZ
TWHQX
TDVWH
TWHDX
Q
D
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White Electronic Designs Corporation Westborough, MA (508) 366-5151
EDI8G322048V
Ordering Information
72
LEAD
SIMM
Package Descriptions
Write Cycle 2 - E Controlled
Part Number
Speed
(ns)
EDI8G322048V20MMC
20
EDI8G322048V25MMC
25
EDI8G322048V35MMC
35
A
TAVEL
HIGH Z
TAVAV
TELEH
E
TAVEH
TEHAX
W
TWLEH
TEHDX
TDVEH
Q
DATA VALID
D
ALL DIMENSIONS ARE IN INCHES
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