WED8LM32129C
HI-RELIABILITY PRODUCT
128Kx32 SRAM MODULE
FEATURES
s
Access Times of 15, 17, 20, 25, 35, 45, 55ns
s
Packaging
PRELIMINARY*
• 68 lead, 23.88mm Low Profile CQFP, 3.56mm (0.140")
s
Organized as 128Kx32; User Configurable as 256Kx16 or
512Kx8
s
Commercial, Industrial and Military Temperature Ranges
s
5 Volt Power Supply
s
Low Power CMOS
s
TTL Compatible Inputs and Outputs
s
Built in Decoupling Caps and Multiple Ground Pins for Low
Noise Operation
s
Device is upgradeable to 512Kx32
* This data sheet describes a product under development, not fully
characterized, and is subject to change without notice.
FIG. 1
PIN CONFIGURATION FOR WED8LM32129C-E
TOP VIEW
NC
A
0
A
1
A
2
A
3
A
4
A
5
CS
3
GND
CS
4
WE
1
A
6
A
7
A
8
A
9
A
10
V
CC
PIN DESCRIPTION
I/O
0-31
A
0-16
I/O
16
I/O
17
I/O
18
I/O
19
I/O
20
I/O
21
I/O
22
I/O
23
GND
I/O
24
I/O
25
I/O
26
I/O
27
I/O
28
I/O
29
I/O
30
I/O
31
Data Inputs/Outputs
Address Inputs
Write Enables
Chip Selects
Output Enable
Power Supply
Ground
Not Connected
9 8 7 6 5 4 3 2 1 68 67 66 65 64 63 62 61
I/O
0
I/O
1
I/O
2
I/O
3
I/O
4
I/O
5
I/O
6
I/O
7
GND
I/O
8
I/O
9
I/O
10
I/O
11
I/O
12
I/O
13
I/O
14
I/O
15
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
WE
2
WE
3
WE
4
V
CC
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
CS
1
OE
A
11
A
12
A
13
A
14
A
15
A
16
NC
WE
1-4
CS
1-4
OE
0.940"
V
CC
GND
NC
The WEDC 68 lead CQFP fills
the same fit and function as the
JEDEC 68 lead CQFJ or 68
PLCC. But the CQFP has the
TCE and lead inspection
advantage of the CQFP form.
CS
2
NC
NC
NC
BLOCK DIAGRAM
WE
1
CS
1
OE
A
0-16
128K x 8
128K x 8
WE
2
CS
2
WE
3
CS
3
WE
4
CS
4
128K x 8
128K x 8
8
8
8
8
I/O
0-7
I/O
8-15
I/O
16-23
I/O
24-31
July 1999 Rev. 0
1
White Electronic Designs Corporation • (602) 437-1520 • www.whitedc.com
WED8LM32129C
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
-0.5
Min
-55
-65
-0.5
Max
+125
+150
Vcc+0.5
150
7.0
Unit
°C
°C
V
°C
V
CS
H
L
L
L
OE
X
L
X
H
X
H
L
H
TRUTH TABLE
WE
Mode
Standby
Read
Write
Out Disable
Data I/O
High Z
Data Out
Data In
High Z
Power
Standby
Active
Active
Active
RECOMMENDED OPERATING CONDITIONS
Parameter
Supply Voltage
Input High Voltage
Input Low Voltage
Operating Temp.
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
Parameter
OE capacitance
WE
1-4
capacitance
CQFP
CS
1-4
capacitance
Data I/O capacitance
Address input capacitance
CAPACITANCE
(T
A
= +25°C)
Symbol
C
OE
C
WE
C
CS
C
I/O
C
AD
Conditions
V
IN
= 0 V, f = 1.0 MHz
V
IN
= 0 V, f = 1.0 MHz
12
V
IN
= 0 V, f = 1.0 MHz
V
I/O
= 0 V, f = 1.0 MHz
V
IN
= 0 V, f = 1.0 MHz
12
12
12
pF
pF
pF
Max
30
Unit
pF
pF
This parameter is guaranteed by design but not tested.
DC CHARACTERISTICS
(V
CC
= 5.0V, GND = 0V, T
A
= -55°C to +125°C)
Parameter
Input Leakage Current
Output Leakage Current
Operating Supply Current
Standby Current
Output Low Voltage
Output High Voltage
Parameter
Input Leakage Current
Output Leakage Current
Operating Supply Current
Standby Current
Output Low Voltage
Output High Voltage
Sym
I
LI
I
LO
I
CC
I
SB
V
OL
V
OH
Sym
I
LI
I
LO
I
CC
I
SB
V
OL
V
OH
Conditions
Min
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, Vcc = 5.5
CS = V
IH
, OE = V
IH
, f = 5MHz, Vcc = 5.5
I
OL
= 8mA, V
CC
= 4.5
I
OH
= -4.0mA, V
CC
= 4.5
Conditions
Min
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, Vcc = 5.5
CS = V
IH
, OE = V
IH
, f = 5MHz, Vcc = 5.5
I
OL
= 2.1mA, V
CC
= 4.5
I
OH
= -1.0mA, V
CC
= 4.5
2.4
2.4
-15
Max
10
10
600
80
0.4
2.4
-35
Max
10
10
600
60
0.4
2.4
Min
-17
Min Max
10
10
600
80
0.4
2.4
-45
Max
10
10
600
60
0.4
2.4
Min
Min
-20
Max
10
10
600
80
0.4
2.4
-55
Max
10
10
600
60
0.4
Min
-25
Max
10
10
600
60
0.4
Units
µA
µA
mA
mA
V
V
Units
µA
µA
mA
mA
V
V
NOTE: DC test conditions: V
IH
= V
CC
-0.3V, V
IL
= 0.3V
White Electronic Designs Corporation • (602) 437-1520 • www.whitedc.com
2
WED8LM32129C
AC CHARACTERISTICS
(V
CC
= 5.0V, GND = 0V, T
A
= -55°C to +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
t
RC
t
AA
t
OH
t
ACS
t
OE
t
CLZ
1
t
OLZ
t
CHZ
1
Symbol
-15
Min
15
15
0
15
10
3
0
12
12
3
0
0
Max
-17
Min
17
17
0
17
10
3
0
12
12
Max Min
20
-20
Max
Min
25
20
0
20
12
3
0
12
12
-25
Max
Min
35
25
0
25
15
3
0
12
12
-35
Max
Min
45
35
0
35
20
3
0
20
20
-45
Max
-55
Min
55
45
0
45
25
3
0
20
20
20
20
55
30
55
Max
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
1
t
OHZ
1
1. This parameter is guaranteed by design but not tested.
AC CHARACTERISTICS
(V
CC
= 5.0V, GND = 0V, T
A
= -55°C to +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
t
WC
t
CW
t
AW
t
DW
t
WP
t
AS
t
AH
t
OW
1
Symbol
Min
15
14
14
10
14
0
0
3
-15
Max
17
14
15
10
14
0
0
3
10
0
0
-17
Min
Max
Min
20
15
15
12
15
0
0
3
10
0
-20
Max
Min
25
20
20
15
20
0
0
3
12
0
-25
Max
35
25
25
20
25
0
0
4
15
0
-35
Min
Max
Min
45
30
30
25
30
0
0
4
20
0
-45
Max
Min
55
45
45
25
45
0
0
4
25
0
-55
Max
Units
ns
ns
ns
ns
ns
ns
ns
ns
25
ns
ns
t
WHZ
t
DH
1
1. This parameter is guaranteed by design but not tested.
FIG. 2
AC TEST CIRCUIT
Current Source
I
OL
AC TEST CONDITIONS
Parameter
Input Pulse Levels
Input Rise and Fall
Input and Output Reference Level
D.U.T.
V
Z
Typ
V
IL
= 0, V
IH
= 3.0
5
1.5
1.5
Unit
V
ns
V
V
≈
1.5V
Output Timing Reference Level
C
eff
= 50 pf
(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 Z
0
= 75
Ω.
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.
3
White Electronic Designs Corporation • (602) 437-1520 • www.whitedc.com
WED8LM32129C
FIG. 3
TIMING WAVEFORM - READ CYCLE
ADDRESS
t
RC
t
AA
CS
t
RC
ADDRESS
t
ACS
t
CLZ
OE
t
CHZ
t
AA
t
OH
DATA I/O
PREVIOUS DATA VALID
DATA VALID
t
OE
t
OLZ
DATA I/O
HIGH IMPEDANCE
t
OHZ
DATA VALID
READ CYCLE 1 (CS = OE = V
IL
, WE = V
IH
)
READ CYCLE 2 (WE = V
IH
)
FIG. 4
WRITE CYCLE - WE CONTROLLED
t
WC
ADDRESS
t
AW
t
CW
CS
t
AH
t
AS
WE
t
WP
t
OW
t
WHZ
t
DW
t
DH
DATA I/O
DATA VALID
WRITE CYCLE 1, WE CONTROLLED
FIG. 5
WRITE CYCLE - CS CONTROLLED
ADDRESS
t
WC
WS32K32-XHX
t
AS
t
AW
t
CW
t
AH
CS
t
WP
WE
t
DW
DATA I/O
DATA VALID
t
DH
WRITE CYCLE 2, CS CONTROLLED
White Electronic Designs Corporation • (602) 437-1520 • www.whitedc.com
4
WED8LM32129C
PACKAGE DIMENSION:
68 LEAD, LOW PROFILE CERAMIC QUAD FLAT PACK, CQFP
3.56 (0.140) MAX
0.25 (0.010)
25.27 (0.995)
±
0.13 (0.005) SQ
23.88 (0.940)
±
0.25 (0.010) SQ
0.61 (0.024)
±
0.15 (0.006)
0.64 (0.025) REF
DETAIL A
1.27 (0.050)
0.38 (0.015)
±
0.05 (0.002)
20.3 (0.800) REF
SEE DETAIL "A"
The WEDC 68 lead CQFP fills
the same fit and function as the
JEDEC 68 lead CQFJ or 68
PLCC. But the CQFP has the
TCE and lead inspection
advantage of the CQFP form.
0.940"
ALL LINEAR DIMENSIONS ARE MILLIMETERS AND PARENTHETICALLY IN INCHES
5
White Electronic Designs Corporation • (602) 437-1520 • www.whitedc.com
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