Trailing Edge Product - Not recommended for new designs
MSM832 - 85/10
ISSUE 5.1 October 2002
32K x 8 SRAM
MSM832 - 85/10
Elm Road, West Chirton, NORTH SHIELDS, Tyne & Wear
NE29 8SE, England Tel. +44 (0)191 2930500 Fax. +44 (0) 191 2590997
Issue 5.1 November 2002
Description
The MSM832 is a Static RAM organised as 32K x
8 available with access times of 85 or 100 ns. The
device is available in 0.3inch pin pitch ceramic
DIL package. It features completely static opera-
tion with a low power standby mode and is 3.0V
battery back-up compatible. It is directly TTL
compatible and has common data inputs and
outputs.
The device may be screened in accordance with
MIL-STD-883.
32,768 x 8 CMOS Static RAM
Features
ï Fast Access Times of 85 or 100 ns.
ï JEDEC Standard footprint.
ï Low Power Operation : 578 mW (max)
ï Low Power Standby : 2.5 mW (max) -L version.
ï Low Voltage Data Retention.
ï Directly TTL compatible.
ï Completely Static Operation.
Block Diagram
Pin Definitions
A14
A12
A7
A6
A5
A4
A3
A2
A1
A0
D0
D1
D2
GND
1
2
3
4
5
6 TOP VIEW
7 PACKAGE
8
V,T,S
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
VCC
W
E
A13
A8
A9
A11
OE
A10
CS
D7
D6
D5
D4
D3
A3
A4
A5
A6
A7
A8
A12
A13
A14
X
Address
Buffer
Row
Decoder
Memory Array
512 X 512
D0
D7
I/O
Buffer
Column I/O
Column Decoder
WE
OE
Y Address Buffer
A0
A1
A2
A9
A10
A11
CS
Package Details
Pin Count
28
Description
Package Type
T
Pin Functions
A0-A14
Address inputs
D0-7
Data Input/Output
CS
Chip Select
OE
Output Enable
WE
Write Enable
V
CC
Power(+5V)
GND
Ground
0.3" Dual-in-line (SKINNY DIP)
ISSUE 5.1 November 2002
MSM832 - 85/10
DC OPERATING CONDITIONS
Absolute
Maximum Ratings
(1)
Voltage on any pin relative to V
SS (2)
Power Dissipation
Storage Temperature
V
T
P
T
T
STG
-0.5V to +7
1
-55 to +150
V
W
o
C
Notes : (1) Stresses above those listed may cause permanent damage. This is a stress rating only and functional
operation of the device at these or any other conditions above those indicated in the operational sections
of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods
may affect device reliability.
Recommended Operating Conditions
Parameter
Supply Voltage
Input High Voltage
Input Low Voltage
Operating Temperature
Symbol
V
CC
V
IH
V
IL
T
A
T
AL
T
AM
min
4.5
2.2
-0.3
0
-40
-55
typ
5.0
-
-
-
-
-
max
5.5
5.8
0.8
70
85
125
Unit
V
V
V
o
o
C
C ( Suffix
I
)
C ( Suffix
M, MB
)
o
DC Electrical Characteristics
(V
CC
= 5.0V±10%, T
A
=-55∞C to +125∞C)
Parameter
Input Leakage Current
Output Leakage Current
Average Supply Current
Standby Supply Current
-L Version
Output Voltage
Symbol Test Condition
I
LI
I
LO
I
CC
I
SB1
I
SB2
V
OL
V
OH
V
IN
=0V to V
CC
CS=V
IH
or OE=V
IH
,V
I/O
= V
SS
to V
CC
,WE=V
IL
CS=V
IL
,I
I/O
=0mA, Min. Cycle, Duty=100%
CS=V
IH
,Min Cycle.
CS≥V
CC
-0.2V, 0.2V≥V
IN
≥V
CC
-0.2V
I
OL
= 2.1 mA
I
OH
= -1.0 mA
min
-4
-4
-
-
-
-
2.4
typ
-
-
-
-
-
-
-
max
4
4
105
3.5
450
0.4
-
Unit
µA
µA
mA
mA
uA
V
V
Capacitance
(V
CC
=5V±10%,T
A
=25∞C)
Parameter
Input Capacitance
I/O Capacitance
Note:
Symbol Test Condition
C
IN
C
I/O
V
IN
= 0V
V
I/O
= 0V
min
-
-
typ
-
-
max
8
10
Unit
pF
pF
This parameter is not 100% tested.
MSM832 - 85/10
ISSUE 5.1 October 2002
Operating Modes
The table below shows the logic inputs required to control the MSM832 SRAM.
Mode
Not Selected
OutputDisable
Read
Write
CS
1
0
0
0
OE
X
1
0
X
1 = V
IH
,
WE
X
1
1
0
V
CC
Current
I
SB1
,I
SB2
I
CC
I
CC
I
CC
0 = V
IL
,
I/O Pin Reference Cycle
High Z
High Z
D
OUT
D
IN
Read Cycle
Write Cycle
Power Down
X = Don't Care
Low V
cc
Data Retention Characteristics - L Version Only
( T
A
=-55∞C to +125∞C)
Parameter
V
CC
for Data Retention
Data Retention Current -L Version
Chip Deselect to Data Retention Time
Operation Recovery Time
Notes (1) t
RC
= Read Cycle Time
Symbol
V
DR
I
CCDR2
t
CDR
t
R
Test Condition
CS≥V
CC
-0.2V, V
IN
≥0V
See Retention Waveform
See Retention Waveform
min
2.0
0
t
RC(1)
typ
-
-
-
-
max
-
700
-
-
Unit
V
µA
ns
ns
V
CC
=3.0V, CS≥V
CC
-0.2V, V
IN
≥0V
-
AC
Test Conditions
* Input pulse levels: 0V to 3.0V
* Input rise and fall times: 3ns
* Input and Output timing reference levels: 1.5V
* Output load: see diagram
* V
cc
=5V±10%
Output Load
I/O Pin
Ω
166†
1.76V
30pF
!
ISSUE 5.1 November 2002
MSM832 - 85/10
AC OPERATING CONDITIONS
Read Cycle
85
Parameter
Read Cycle Time
Address Access Time
Chip Select Access Time
Output Enable to Output Valid
Output Hold from Address Change
Chip Selection to Output in Low Z
Output Enable to Output in Low Z
Chip Deselection to Output in High Z
(3)
Output Disable to Output in High Z
(3)
Symbol min
t
RC
t
AA
t
ACS
t
OE
t
OH
t
CLZ
t
OLZ
t
CHZ
t
OHZ
85
-
-
-
5
10
5
0
0
max
-
85
85
45
-
-
-
35
35
min
100
-
-
-
10
10
5
0
0
10
max
-
100
100
50
-
-
-
45
45
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
Write Cycle
Parameter
Write Cycle Time
Chip Selection to End of Write
Address Valid to End of Write
Address Setup Time
Write Pulse Width
Write Recovery Time
Write to Output in High Z
Data to Write Time Overlap
Data Hold from Write Time
Output Disable to Output in High Z
(3)
Output Active from End of Write
85
Symbol min. max
t
WC
t
CW
t
AW
t
AS
t
WP
t
WR
t
WHZ
t
DW
t
DH
t
OHZ
t
OW
85
75
75
0
60
0
0
40
0
0
5
-
-
-
-
-
-
30
-
-
30
-
10
min
max
100
80
80
0
70
0
0
40
0
0
5
-
-
-
-
-
-
35
-
-
35
-
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
"
MSM832 - 85/10
ISSUE 5.1 October 2002
Read
Cycle Timing Waveform
(1)
t
RC
Address
t
AA
OE
t
OE
t
OLZ
t
OH
CS
t
CLZ
t
ACS
t
CHZ(3)
t
OHZ(3)
Dout
High-Z
Data Valid
Write
Cycle No.1 Timing Waveform
t
WC
Address
t
AS(3)
t
AW
t
CW(4)
(6)
OE
t
WR
(2)
CS
t
WP(1)
WE
t
OHZ(3,9)
High-Z
t
DW
High-Z
t
OW
t
DH
Dout
Din
Data Valid
#
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