White Electronic Designs
512Kx16 SRAM MODULE
FEATURES
Access Times 17, 20, 25, 35ns
MIL-STD-883 Compliant Devices Available
Packaging
• 44 pin Ceramic SOJ (Package 102)
• 44 lead Ceramic Flatpack (Package 209)
Organized as two banks of 256Kx16
Data Byte Control:
Lower Byte (LB#) = I/O1-8
Upper Byte (UB#) = I/O9-16
WS512K16-XXX
ADVANCED*
Data I/O Compatible with 3.3V devices
2V Minimum Data Retention for battery back up
operation
Commercial, Industrial and Military Temperature
Range
5 Volt Power Supply (3.3V parts also available)
Low Power CMOS
TTL Compatible Inputs and Outputs
* This product is under development, is not qualified or characterized and is subject to
change or cancellation without notice.
PIN CONFIGURATION FOR WS512K16-XXX
44 CSOJ
44 FLATPACK
Top View
A0
A1
A2
A3
A4
CS1#
I/O1
I/O2
I/O3
I/O4
V
CC
GND
I/O5
I/O6
I/O7
I/O8
WE#
A5
A6
A7
A8
A9
Pin Description
A0-17
LB#
UB#
I/O1-16
CS1-2#
OE#
WE#
V
CC
GND
NC
Address Inputs
Lower-Byte Control (I/O1-8)
Upper-Byte Control (I/O9-16)
Data Input/Output
Chip Select
Output Enable
Write Enable
+5.0V Power
Ground
No Connection
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
A17
A16
A15
OE#
UB#
LB#
I/O16
I/O15
I/O14
I/O13
GND
V
CC
I/O12
I/O11
I/O10
I/O9
CS2#
A14
A13
A12
A11
A10
Block Diagram
A
0 - 1 7
W E#
O E#
U B#
L B#
256K x 16
256K x 16
C S
1#
C S
2#
I/O
1-16
White Electronic Designs Corp. reserves the right to change products or specifications without notice.
April 1998
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White Electronic Designs
TRUTH TABLE
CS1#
H
L
H
L
H
H
L
H
L
CS2#
H
H
L
H
L
L
H
L
H
L
H
WE#
X
H
X
H
OE#
X
H
X
L
LB#
X
X
H
L
H
L
L
H
L
UB#
X
X
Output Disable
H
H
L
L
H
L
L
Read
Data Out
High Z
Data Out
Data In
High Z
Data In
High Z
Mode
Not Select
Data I/O
I/O1-8
WS512K16-XXX
ADVANCED
I/O9-16
Power
Standby
High Z
Active
Write
High Z
Data Out
Data Out
High Z
Data In
Data In
Active
Active
ABSOLUTE MAXIMUM RATINGS
Parameter
Operating Temperature
Storage Temperature
Signal Voltage Relative to GND
Junction Temperature
Supply Voltage
Symbol
T
A
T
STG
V
G
T
J
V
CC
Min
-55
-65
-0.5
-0.5
Max
+125
+150
V
CC
+0.5
150
7.0
Unit
°C
°C
V
°C
V
RECOMMENDED OPERATING CONDITIONS
Parameter
Supply Voltage
Input High Voltage
Input Low Voltage
Opertating Temp. (MIL)
Symbol
V
CC
V
IH
V
IL
T
A
Min
4.5
2.2
-0.3
-55
Max
5.5
V
CC
+ 0.3
+0.8
+125
Unit
V
V
V
°C
CAPACITANCE
T
A
= +25°C
Parameter
Input capacitance
Output capacitance
Symbol
Conditions
Max Unit
C
IN
V
IN
= 0V, f = 1.0 MHz 25 pF
C
OUT
V
OUT
= 0V, f = 1.0 MHz 25 pF
This parameter is guaranteed by design but not tested.
DC CHARACTERISTICS
V
CC
= 5.0V, V
SS
= 0V, -55°C
≤
T
A
≤
+125°C
Parameter
Input Leakage Current
Output Leakage Current
Operating Supply Current
Standby Current
Output Low Voltage
Output High Voltage
NOTE: DC test conditions: V
IH
= V
CC
-0.3V, V
IL
= 0.3V
Sym
I
LI
I
LO
I
CC
I
SB
V
OL
V
OH
Conditions
V
CC
= 5.5, V
IN
= GND to V
CC
CS# = V
IH
, OE# = V
IH
, V
OUT
= GND to V
CC
CS# = V
IL
, OE# = V
IH
, f = 5MHz, V
CC
= 5.5
CS# = V
IH
, OE# = V
IH
, f = 5MHz, V
CC
= 5.5
I
OL
= 8mA, V
CC
= 4.5
I
OH
= -4.0mA, V
CC
= 4.5
Min
Max
10
10
290
30
0.4
Units
µA
µA
mA
mA
V
V
2.4
DATA RETENTION CHARACTERISTICS
-55°C
≤
T
A
≤
+125°C
Characteristic
Data Retention Supply Voltage
Data Retention Current
Sym
V
DR
I
CCDR1
Conditions
CS# ≥ V
CC
-0.2V
V
CC
= 3V
Min
2.0
Typ
2.0
Max
5.5
12.0*
Units
µA
mA
* Also available in Low Power version. Please call factory for informaion.
White Electronic Designs Corp. reserves the right to change products or specifications without notice.
April 1998
2
White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com
White Electronic Designs
AC CHARACTERISTICS
V
CC
= 5.0V, GND = 0V, -55°C
≤
T
A
≤
+125°C
Parameter
Read Cycle
Read Cycle Time
Address Access Time
Output Hold from Address Change
Chip Select Access Time
Output Enable to Output Valid
Chip Select to Output in Low Z
Output Enable to Output in Low Z
Chip Disable to Output in High Z
Output Disable to Output in High Z
LB#, UB# Access Time
LB#, UB# Enable to Low Z Output
LB#, UB# Disable to High Z Output
Symbol
t
RC
t
AA
t
OH
t
ACS
t
OE
t
CLZ1
t
OLZ1
t
CHZ1
t
OHZ1
t
BA
t
BLZ1
t
BHZ1
Min
17
0
17
10
2
0
9
9
10
0
9
0
10
5
0
10
10
12
0
12
-17
Max
17
0
20
12
5
0
12
12
14
Min
20
-20
Max
20
0
25
15
Min
25
-25
WS512K16-XXX
ADVANCED
-35
Max
25
0
35
20
5
0
15
15
17
0
15
Min
35
Max
35
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
1. This parameter is guaranteed by design but not tested.
AC CHARACTERISTICS
V
CC
= 5.0V, GND = 0V, -55°C
≤
T
A
≤
+125°C
Parameter
Write Cycle
Write Cycle Time
Chip Select to End of Write
Address Valid to End of Write
Data Valid to End of Write
Write Pulse Width
Address Setup Time
Address Hold Time
Output Active from End of Write
Write Enable to Output in High Z
Data Hold Time
LB#, UB# Valid to End of Write
Symbol
t
WC
t
CW
t
AW
t
DW
t
WP
t
AS
t
AH
t
OW1
t
WHZ1
t
DH
t
BW
Min
17
14
14
10
14
0
0
0
0
14
-17
Max
Min
20
17
17
12
17
0
0
0
0
17
-20
Max
Min
25
20
20
15
20
0
0
0
0
20
-25
Max
Min
35
25
25
20
25
0
0
0
0
25
-35
Max
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Units
9
10
10
15
1. This parameter is guaranteed by design but not tested.
AC TEST CIRCUIT
AC Test Conditions
I
OL
Current Source
D.U.T.
C
eff
= 50 pf
V
Z
1.5V
Parameter
Input Pulse Levels
Input Rise and Fall
Input and Output Reference Level
Output Timing Reference Level
Typ
V
IL
= 0, V
IH
= 3.0
5
1.5
1.5
Unit
V
ns
V
V
(Bipolar Supply)
I
OH
Current Source
Notes:
V
Z
is programmable from -2V to +7V.
I
OL
& I
OH
programmable from 0 to 16mA.
Tester Impedance Z0 = 75Ω.
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.
White Electronic Designs Corp. reserves the right to change products or specifications without notice.
April 1998
3
White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com
White Electronic Designs
TIMING WAVEFORM – READ CYCLE
WS512K16-XXX
ADVANCED
t
RC
ADDRESS
t
AA
CS#
t
ACS
LB#, UB#
t
CHZ
t
BA
t
BLZ
t
CLZ
OE#
t
BHZ
t
OE
t
OLZ
DATA I/O
HIGH IMPEDANCE
t
OHZ
DATA VALID
READ CYCLE 1, (CS# = OE# = V
IL
, UB# or LB# = V
IL
, WE# = V
IH
)
READ CYCLE 2 (WE# = V
IH
)
WRITE CYCLE – WE# CONTROLLED
t
WC
ADDRESS
t
AW
t
CW
CS#
t
AH
t
BW
LB#, UB#
t
AS
WE#
t
WP
t
OW
t
WHZ
t
DW
t
DH
DATA I/O
DATA VALID
WRITE CYCLE 1, WE# CONTROLLED
WRITE CYCLE – CS# CONTROLLED
t
WC
ADDRESS
WRITE CYCLE – LB#, UB# CONTROLLED
t
WC
ADDRESS
t
AS
CS#
t
AW
t
CW
t
BW
t
AH
CS#
t
AS
t
AW
t
CW
t
BW
t
AH
LB#, UB#
LB#, UB#
t
WP
WE#
WE#
t
WP
t
DW
DATA I/O
DATA VALID
t
DW
DATA I/O
DATA VALID
t
DH
t
DH
WRITE CYCLE 2, CS# CONTROLLED
WRITE CYCLE 3, LB#, UB# CONTROLLED
White Electronic Designs Corp. reserves the right to change products or specifications without notice.
April 1998
4
White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com
White Electronic Designs
PACKAGE 102: 44 LEAD, CERAMIC SOJ
WS512K16-XXX
ADVANCED
28.70 (1.13) ± 0.25 (0.010)
0.2 (0.008)
± 0.05 (0.002)
3.96 (0.156) MAX
0.89 (0.035)
Radius TYP
11.3 (0.446)
± 0.2 (0.009)
9.55 (0.376)
± 0.25 (0.010)
1.27 (0.050)
± 0.25 (0.010)
PIN 1 IDENTIFIER
1.27 (0.050) TYP
26.7 (1.050) TYP
ALL LINEAR DIMENSIONS ARE MILLIMETERS AND PARENTHETICALLY IN INCHES
PACKAGE 209: 44 LEAD, CERAMIC FLAT PACK
28.45 (1.120)
± 0.26 (0.010)
3.18 (0.125)
MAX
PIN 1
IDENTIFIER
12.95 (0.510)
± 0.13 (0.005)
9.90 (0.390)
± 0.13 (0.005)
10.16 (0.400)
± 0.51 (0.020)
0.43 (0.017)
± 0.05 (0.002)
26.67 (1.050) TYP
0.13 (0.005)
± 0.05 (0.002)
1.27 (0.050) TYP
ALL LINEAR DIMENSIONS ARE MILLIMETERS AND PARENTHETICALLY IN INCHES
White Electronic Designs Corp. reserves the right to change products or specifications without notice.
April 1998
5
White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com
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