ChipFind - документация

Электронный компонент: W24257AQ-15

Скачать:  PDF   ZIP

Document Outline

W24257A
32K 8 HIGH SPEED CMOS STATIC RAM
Publication Release Date: May 1997
- 1 -
Revision A14
GENERAL DESCRIPTION
The W24257A is a high speed, low power CMOS static RAM organized as 32768
8 bits that
operates on a single 5-volt power supply. This device is manufactured using Winbond's high
performance CMOS technology.
FEATURES
High speed access time: 10/12/15/20 nS (max.)
Low power consumption:
-
Active: 400 mW (typ.)
Single
+5V power supply
Fully static operation
All inputs and outputs directly TTL compatible
Three-state outputs
Available packages: 28-pin 300 mil SOJ, 330
mil SOP, skinny DIP and standard type one
TSOP (8 mm
13.4 mm)
PIN CONFIGURATIONS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28-pin
DIP
28
27
26
25
24
23
22
21
20
19
18
17
16
15
V
DD
WE
A13
A8
A9
A11
OE
A10
CS
I/O8
I/O7
I/O6
I/O5
I/O4
A14
A12
A7
A6
A5
A4
A3
A2
A1
A0
I/O1
I/O2
I/O3
V
SS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
28-pin
TSOP
OE
A11
A9
A8
A13
WE
V
DD
A14
A12
A7
A6
A5
A4
A3
A10
CS
I/O8
I/O7
I/O6
I/O5
I/O4
I/O3
I/O2
I/O1
A0
A1
A2
V
SS
BLOCK DIAGRAM
A0
.
.
CS
A14
WE
I/O1
I/O8
OE
V
DD
V
SS
.
.
DATA I/O
DECODER
CONTROL
CORE
ARRAY
PIN DESCRIPTION
SYMBOL
DESCRIPTION
A0
-A14
Address Inputs
I/O1
-I/O8
Data Inputs/Outputs
CS
Chip Select Input
WE
Write Enable Input
OE
Output Enable Input
V
DD
Power Supply
V
SS
Ground
W24257A
- 2 -
DC CHARACTERISTICS
Absolute Maximum Ratings
PARAMETER
RATING
UNIT
Supply Voltage to V
SS
Potential
-0.5 to +7.0
V
Input/Output to V
SS
Potential
-0.5 to V
DD
+0.5
V
Allowable Power Dissipation
1.0
W
Storage Temperature
-65 to +150
C
Operating Temperature
0 to +70
C
Note: Exposure to conditions beyond those listed under Absolute Maximum Ratings may adversely affect the life and reliability of the
device.
TRUTH TABLE
CS
OE
WE
MODE
I/O1
-I/O8
V
DD
CURRENT
H
X
X
Not Selected
High Z
I
SB
, I
SB1
L
H
H
Output Disable
High Z
I
DD
L
L
H
Read
Data Out
I
DD
L
X
L
Write
Data In
I
DD
OPERATING CHARACTERISTICS
(V
DD
= 5V
10%, V
SS
= 0V, T
A
= 0 to 70
C)
PARAMETER
SYM.
TEST CONDITIONS
MIN.
TYP.
MAX.
UNIT
Input Low Voltage
V
IL
-
-0.5
-
+0.8
V
Input High Voltage
V
IH
-
+2.2
-
V
DD
+0.5
V
Input Leakage Current
I
LI
V
IN
= V
SS
to V
DD
-10
-
+10
A
Output Leakage
Current
I
LO
V
I/O
= V
SS
to V
DD,
CS = V
IH
or OE = V
IH
or WE = V
IL
-10
-
+10
A
Output Low Voltage
V
OL
I
OL
= +8.0 mA
-
-
0.4
V
Output High Voltage
V
OH
I
OH
= -4.0 mA
2.4
-
-
V
Operating Power
I
DD
CS = V
IL,
I/O = 0 mA
10
-
-
170
mA
Supply Current
Cycle = MIN
12
-
-
160
mA
Duty = 100%
15
150
mA
20
-
-
140
mA
Standby Power
Supply Current
I
SB
CS = V
IH
Cycle = MIN, Duty = 100%
-
-
30
mA
I
SB1
CS
V
DD
-0.2V
-
-
10
mA
Note: Typical characteristics are at V
DD
= 5V, T
A
= 25
C.
W24257A
Publication Release Date: May 1997
- 3 -
Revision A14
CAPACITANCE
(V
DD
= 5V, T
A
= 25
C, f = 1 MHz)
PARAMETER
SYM.
CONDITIONS
MAX.
UNIT
Input Capacitance
C
IN
V
IN
= 0V
8
pF
Input/Output Capacitance
C
I/O
V
OUT
= 0V
10
pF
Note: These parameters are sampled but not 100% tested.
THERMAL RESISTANCE
PARAMETER
SYM
.
CONDITIONS
MAX.
UNIT
Junction to Case Thermal Resistance
JC
A. F. R. = 1m/sec, T
A
= 25
C
20
C/W
Junction to Ambient Thermal
Resistance
JA
A. F. R. = 1m/sec, T
A
= 25
C
60
C/W
Note: These parameters are only applied to "TSOP" and "SOJ" package types.
AC TEST CONDITIONS
PARAMETER
CONDITIONS
Input Pulse Levels
0V to 3V
Input Rise and Fall Times
5 nS
Input and Output Timing Reference Level
1.5V
Output Load
C
L
= 30 pF, I
OH
/I
OL
= -4 mA/8 mA
W24257A
- 4 -
AC TEST LOADS AND WAVEFORM
90%
90%
5 nS
10%
5 nS
10%
R1 480 ohm
5V
OUTPUT
R2
255 ohm
5 pF
R2
255 ohm
R1 480 ohm
5V
OUTPUT
30 pF
Including
Jig and
Scope
3.0V
0V
Including
Jig and
Scope
)
(For T
CLZ
,
,
,
,
,
T
OLZ
T
CHZ
T
OHZ
T
WHZ
T
OW
W24257A
Publication Release Date: May 1997
- 5 -
Revision A14
AC CHARACTERISTICS
(V
DD
= 5V
10%, V
SS
= 0V, T
A
= 0 to 70
C)
Read Cycle
PARAMETER
SYM.
W24257A-10
W24257A-12
W24257A-15
W24257A-20
UNIT
MIN.
MAX.
MIN.
MAX.
MIN.
MAX.
MIN.
MAX.
Read Cycle Time
T
RC
10
-
12
-
15
-
20
-
nS
Address Access Time
T
AA
-
10
-
12
-
15
-
20
nS
Chip Select Access Time
T
ACS
-
10
-
12
-
15
-
20
nS
Output Enable to Output Valid
T
AOE
-
5
-
6
-
7
-
10
nS
Chip Selection to Output in Low Z
T
CLZ
3
-
3
-
3
-
3
-
nS
Output Enable to Output in Low Z
T
OLZ
0
-
0
-
0
-
0
-
nS
Chip Deselection to Output in High Z
T
CHZ
-
5
-
6
-
7
-
10
nS
Output Disable to Output in High Z
T
OHZ
-
5
-
6
-
7
-
10
nS
Output Hold from Address Change
T
OH
3
-
3
-
3
-
3
-
nS
These parameters are sampled but not 100% tested.
Write Cycle
PARAMETER
SYM.
W24257A-10
W24257A-12
W24257A-15
W24257A-20
UNIT
MIN.
MAX.
MIN.
MAX.
MIN.
MAX.
MIN.
MAX.
Write Cycle Time
T
WC
10
-
12
-
15
-
20
-
nS
Chip Selection to End of Write
T
CW
9
-
10
-
13
-
17
-
nS
Address Valid to End of Write
T
AW
9
-
10
-
13
-
17
-
nS
Address Setup Time
T
AS
0
-
0
-
0
-
0
-
nS
Write Pulse Width
T
WP
9
-
10
-
10
-
12
-
nS
Write Recovery Time
CS , WE
T
WR
0
-
0
-
0
-
0
-
nS
Data Valid to End of Write
T
DW
6
-
7
-
9
-
10
-
nS
Data Hold from End of Write
T
DH
0
-
0
-
0
-
0
-
nS
Write to Output in High Z
T
WHZ
-
6
-
7
-
8
-
10
nS
Output Disable to Output in High Z
T
OHZ
-
6
-
7
-
8
-
10
nS
Output Active from End of Write
T
OW
0
-
0
-
0
-
0
-
nS
These parameters are sampled but not 100% tested.