1
White Electronic Designs Corporation (602) 437-1520 www.wedc.com
White Electronic Designs
WS1M8-XCX
November 2002
Rev. 2
PRELIMINARY*
White Electronic Designs Corp. reserves the right to change products or specifi cations without notice.
2x512Kx8 DUALITHICTM SRAM
FEATURES
Access Times 70, 85, 100ns
Evolutionary,
Corner
Power/Ground
Pinout
Packaging:
32 pin, Hermetic Ceramic DIP (Package 300)
Organized as two banks of 512Kx8
Commercial,
Industrial
and
Military
Temperature
Ranges
5
Volt
Power
Supply
Low
Power
CMOS
TTL Compatible Inputs and Outputs
Output Enable Internally tied to GND.
* This product is under development, is not qualifi ed or characterized and is subject to
change without notice.
NOTE:
1. CS1# and CS2# are used to select the lower and upper 512Kx8 of
the device. CS1# and CS2# must not be enabled at the same time.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
A18
A16
A14
A12
A7
A6
A5
A4
A3
A2
A1
A0
I/O0
I/O1
I/O2
GND
V
CC
A15
A17
WE#
A13
A8
A9
A11
CS2#
A10
CS1#
I/O7
I/O6
I/O5
I/O4
I/O3
Pin Confi guration FOR WS1M8-XCX
32 DIP
Top View
Block Diagram
A
0 - 1 8
W E #
512K x 8
512K x 8
C S
1 #
C S
2 #
I / O
0 - 7
(1)
(1)
Pin Description
A0-18
Address Inputs
I/O0-7
Data Input/Output
CS1-2#
Chip Selects
WE#
Write Enable
V
CC
+5.0V Power Supply
GND
Ground
2
White Electronic Designs Corporation (602) 437-1520 www.wedc.com
White Electronic Designs
WS1M8-XCX
November 2002
Rev. 2
PRELIMINARY
White Electronic Designs Corp. reserves the right to change products or specifi cations without notice.
ABSOLUTE MAXIMUM RATINGS
Parameter
Symbol
Min
Max
Unit
Operating Temperature
T
A
-55 +125
C
Storage Temperature
T
STG
-65
+150
C
Signal Voltage Relative to GND
V
G
-0.5
V
CC
+0.5
V
Junction Temperature
T
J
150
C
Supply Voltage
V
CC
-0.5
7.0
V
RECOMMENDED OPERATING CONDITIONS
Parameter
Symbol
Min
Max
Unit
Supply Voltage
V
CC
4.5
5.5
V
Input High Voltage
V
IH
2.2
V
CC
+ 0.3
V
Input Low Voltage
V
IL
-0.3
+0.8
V
Opertating Temp. (MIL)
T
A
-55
+125
C
TRUTH TABLE
CS#
WE#
Mode
Data I/O
Power
H
X
Standby
High Z
Standby
L
H
Read
Data Out
Active
L
L
Write
Data In
Active
CAPACITANCE
T
A
= +25C
Parameter
Symbol
Conditions Max Unit
Input capacitance
C
IN
V
IN
= 0V, f = 1.0 MHz
28
pF
Output capacitance
C
OUT
V
OUT
= 0V, f = 1.0 MHz
28
pF
This parameter is guaranteed by design but not tested.
DC CHARACTERISTICS
V
CC
= 5.0V, V
SS
= 0V, -55C T
A
+125C
Parameter
Sym
Conditions
Min
Max
Units
Input Leakage Current
I
LI
V
CC
= 5.5, V
IN
= GND to V
CC
10
A
Output Leakage Current
I
LO
1
CS# = V
IH
, V
OUT
= GND to V
CC
10
A
Operating Supply Current
I
CC
1
CS# = V
IL
, f = 5MHz, V
CC
= 5.5
55
mA
Standby Current
I
SB
1
CS# = V
IH
, f = 5MHz, V
CC
= 5.5
2
mA
Output Low Voltage
V
OL
I
OL
= 2.1mA
0.4
V
Output High Voltage
V
OH
I
OH
= -1.0mA
2.4
V
NOTE: DC test conditions: V
IH
= V
CC
-0.3V, V
IL
= 0.3V
1. OE# is internally tied to GND.
DATA RETENTION CHARACTERISTICS
-55C T
A
+125C
Characteristic
Sym
Conditions
Min
Typ
Max
Units
Data Retention Supply Voltage
V
DR
CS# V
CC
-0.2V
2.0
5.5
V
Data Retention Current
I
CCDR1
V
CC
= 3V
150
800*
A
* Also available in Low Power version. Please call factory for informaion.
3
White Electronic Designs Corporation (602) 437-1520 www.wedc.com
White Electronic Designs
WS1M8-XCX
November 2002
Rev. 2
PRELIMINARY
White Electronic Designs Corp. reserves the right to change products or specifi cations without notice.
I
Current Source
D.U.T.
C = 50 pf
eff
I
OL
V
1.5V
(Bipolar Supply)
Z
Current Source
OH
AC CHARACTERISTICS
V
CC
= 5.0V, GND = 0V, -55C T
A
+125C
Parameter
Write Cycle
Symbol
-70
-85
-100
Units
Min
Max
Min
Max
Min
Max
Write Cycle Time
t
WC
70
85
100
ns
Chip Select to End of Write
t
CW
60
75
80
ns
Address Valid to End of Write
t
AW
60
75
80
ns
Data Valid to End of Write
t
DW
30
30
40
ns
Write Pulse Width
t
WP
50
50
60
ns
Address Setup Time
t
AS
0
0
0
ns
Address Hold Time
t
AH
5
5
5
ns
Output Active from End of Write
t
OW
1
5
5
5
ns
Write Enable to Output in High Z
t
WHZ
1
25
25
35
ns
Data Hold Time
t
DH
0
0
0
ns
1. This parameter is guaranteed by design but not tested.
AC CHARACTERISTICS
V
CC
= 5.0V, GND = 0V, -55C T
A
+125C
Parameter
Read Cycle
Symbol
-70
-85
-100
Units
Min
Max
Min
Max
Min
Max
Read Cycle Time
t
RC
70
85
100
ns
Address Access Time
t
AA
70
85
100
ns
Output Hold from Address Change
t
OH
0
0
0
ns
Chip Select Access Time
t
ACS
70
85
100
ns
Chip Select to Output in Low Z
t
CLZ
1
5
5
5
ns
Chip Disable to Output in High Z
t
CHZ
1
25
25
25
ns
1. This parameter is guaranteed by design but not tested.
AC TEST CIRCUIT
Notes:
V
Z
is programmable from -2V to +7V.
I
OL
& I
OH
programmable from 0 to 16mA.
Tester Impedance Z0 = 75.
V
Z
is typically the midpoint of V
OH
and V
OL
.
I
OL
& I
OH
are adjusted to simulate a typical resistive load circuit.
ATE tester includes jig capacitance.
AC Test Conditions
Parameter
Typ
Unit
Input Pulse Levels
V
IL
= 0, V
IH
= 3.0
V
Input Rise and Fall
5
ns
Input and Output Reference Level
1.5
V
Output Timing Reference Level
1.5
V
4
White Electronic Designs Corporation (602) 437-1520 www.wedc.com
White Electronic Designs
WS1M8-XCX
November 2002
Rev. 2
PRELIMINARY
White Electronic Designs Corp. reserves the right to change products or specifi cations without notice.
WRITE CYCLE CS# CONTROLLED
WRITE CYCLE WE# CONTROLLED
ADDRESS
DATA I/O
WRITE CYCLE 1, WE# CONTROLLED
t
AW
t
CW
t
AH
t
WP
t
DW
t
WHZ
t
AS
t
OW
t
DH
t
WC
DATA VALID
CS#
WE#
ADDRESS
DATA I/O
WRITE CYCLE 2, CS# CONTROLLED
t
AW
t
AS
t
CW
t
AH
t
WP
t
DH
t
DW
t
WC
CS#
WE#
DATA VALID
TIMING WAVEFORM READ CYCLE
ADDRESS
DATA I/O
READ CYCLE 2 (WE# = V
IH
)
t
AA
t
ACS
t
CLZ
t
RC
DATA VALID
HIGH IMPEDANCE
CS#
t
CHZ
ADDRESS
DATA I/O
READ CYCLE 1 (CS# = V
IL
, WE# = V
IH
)
t
AA
t
OH
t
RC
DATA VALID
PREVIOUS DATA VALID
NOTE: OE# is internally tied to GND.
5
White Electronic Designs Corporation (602) 437-1520 www.wedc.com
White Electronic Designs
WS1M8-XCX
November 2002
Rev. 2
PRELIMINARY
White Electronic Designs Corp. reserves the right to change products or specifi cations without notice.
PACKAGE 300: 32 PIN, CERAMIC DIP, SINGLE CAVITY SIDE BRAZED
42.4 (1.670) 0.4 (0.016)
PIN 1 IDENTIFIER
0.84 (0.033)
0.4 (0.014)
4.34 (0.171) 0.79 (0.031)
15.04 (0.592)
0.3 (0.012)
ALL LINEAR DIMENSIONS ARE MILLIMETERS AND PARENTHETICALLY IN INCHES
ORDERING INFORMATION
LEAD FINISH:
Blank = Gold plated leads
A = Solder dip leads
DEVICE
GRADE:
M = Military Screened -55C to +125C
I = Industrial
-40C to +85C
C = Commercial
0C to +70C
PACKAGE:
C = Ceramic 0.600" DIP (Package 300)
ACCESS TIME (ns)
ORGANIZATION, two banks of 512K x 8
SRAM
WHITE ELECTRONIC DESIGNS CORP.
W S 1M8 - XXX C X X
PDF 
ZIP