A62L256 Series
Preliminary
Document Title
32K X 8 BIT LOW VOLTAGE CMOS SRAM
Revision History
Rev. No.
1.0
1.1
1.2
1.3
1.4
32K X 8 BIT LOW VOLTAGE CMOS SRAM
History
Initial issue
Modify 28-pin DIP, SOP and TSOP packages outline
dimensions.
Modify 28-pin SOP and TSOP packages outline drawings
and dimensions
Add -LLU type
Change operating voltage Vccmax from 3.3V to 3.6V
Add Product Family in page 1
Delete I
CC
item
Add I
CC2
(typ.) I
CCDR
(typ.)
Change I
SB1
(typ.) I
CCDR
(max.)
Change ordering information from I
CC1
to I
CC2
Issue Date
September 01, 1997
January 20, 1998
June 17, 1998
April 11, 2001
November 30, 2001
Remark
PRELIMINARY
(November, 2001, Version 1.4)
AMIC Technology, Inc.
A62L256 Series
Preliminary
Features
n
External Operating Voltage: 2.7V to 3.6V
n
Access times: 55ns (max.): for VCC = 3.0V to 3.6V
70ns (max.): for VCC = 2.7V to 3.6V
n
Current: Operating (I
CC1
): -55 series 18mA (typ.)
-70 series 12mA (typ.)
Standby (I
SB1
): 0.05µA (typ.)
n
Extended operating temperature range: -40º C to
+85º C for -LLU series
n
Full static operation, no clock or refreshing required
n
All inputs and outputs are directly TTL-compatible
n
Common I/O using three-state output
n
Data retention voltage: 2.0V (min.)
n
Available in 28-pin DIP, SOP and TSOP (forward and
reverse type) packages
32K X 8 BIT LOW VOLTAGE CMOS SRAM
General Description
The A62L256 is a low operating current 262,144-bit static
random access memory organized as 32,768 words by 8
bits and operates on a low power voltage: 2.7V to 3.6V.
Inputs and three-state outputs are TTL compatible and
allow for direct interfacing with common system bus
structures.
Minimum standby power is drawn by this device when
CE is at a high level, independent of the other input
levels.
Data retention is guaranteed at a power supply voltage
as low as 2.0V.
Product Family
Product Family
Operating
Temperature
VCC
Range
Speed
Power Dissipation
Data Retention
Standby
Operating
(I
CCDR
, Typ.)
(I
SB1
, Typ.) (I
CC2
, Typ.)
0.02µA
0.05µA
1mA
Package
Type
28L DIP
28L SOP
28L TSOP
A62L256
-40°C ~ +85°C
2.7V~3.6V
55ns / 70ns
1. Typical values are measured at VCC = 3.0V, T
A
= 25°C and not 100% tested.
2. Data retention current VCC = 2.0V.
Pin Configurations
n
DIP
A14
A12
A7
A6
A5
A4
A3
A2
A1
A0
I/O
0
I/O
1
I/O
2
GND
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
VCC
WE
A13
A8
A9
A11
OE
A10
CE
I/O
7
I/O
6
I/O
5
I/O
4
I/O
3
n
SOP
A14
A12
A7
A6
A5
A4
A3
A2
A1
A0
I/O
0
I/O
1
I/O
2
GND
1
2
3
4
5
28
27
26
25
24
VCC
WE
A13
A8
A9
A11
OE
A10
CE
I/O
7
I/O
6
I/O
5
I/O
4
I/O
3
n
TSOP
OE
A11
A9
A8
A13
WE
VCC
A14
A12
A7
A6
A5
A4
A3
1
2
3
4
5
6
7
8
9
10
11
12
13
14
~
~
6
7
8
9
10
11
12
13
14
23
22
21
20
19
18
17
16
15
A62L256V
PRELIMINARY
(November, 2001, Version 1.4)
2
AMIC Technology, Inc.
~
~
A3
A4
A5
A6
A7
A12
A14
VCC
WE
A13
A8
A9
A11
OE
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
A10
CE
I/O
7
I/O
6
I/O
5
I/O
4
I/O
3
VSS
I/O
2
I/O
1
I/O
0
A0
A1
A2
A62L256
A62L256M
A62L256R
28
27
26
25
24
23
22
21
20
19
18
17
16
15
A2
A1
A0
I/O
0
I/O
1
I/O
2
VSS
I/O
3
I/O
4
I/O
5
I/O
6
I/O
7
CE
A10
A62L256 Series
Block Diagram
A5
VCC
GND
ROW
512 X 512
MEMORY ARRAY
A9
A11
A14
DECODER
I/O
0
COLUMN I/O
INPUT
DATA
CIRCUIT
COLUMN DECODER
I/O
7
A0
A4 A10
CE
OE
WE
CONTORL
CIRCUIT
Pin Descriptions - DIP/SOP
Pin No.
1-10, 21, 23-26
11-13, 15-19
14
20
22
27
28
Symbol
A0 - A14
I/O
0
- I/O
7
GND
CE
OE
WE
VCC
Description
Address Input
Data Input/Output
Ground
Chip Enable
Output Enable
Write Enable
Power Supply
Pin Description-TSOP
Pin No.
1
2-5, 8-17, 28
7
6
18-20, 22-26
21
27
Symbol
OE
A0 - A14
VCC
WE
I/O
0
- I/O
7
GND
CE
Description
Output Enable
Address Input
Power Supply
Write Enable
Data Input/Output
Ground
Chip Enable
PRELIMINARY
(November, 2001, Version 1.4)
3
AMIC Technology, Inc.
A62L256 Series
Recommended DC Operating Conditions
(T
A
= 0°C to + 70°C or -40°C to +85°C)
Symbol
VCC
GND
V
IH
V
IL
Parameter
Supply Voltage
Ground
Input High Voltage
Input Low Voltage
Min.
2.7
0
VCC * 0.7
-0.3
Typ.
3.0
0
-
0
Max.
3.6
0
VCC + 0.3
+0.3
Unit
V
V
V
V
Absolute Maximum Ratings*
VCC to GND . . . . . . . . . . . . . . . . . . . . . -0.5V to +3.6V
IN, IN/OUT Volt to GND . . . . . . . . . -0.5V to VCC + 0.5V
Operating Temperature, Topr . . . . . . . . . . 0°C to +70°C
Storage Temperature, Tstg . . . . . . . . . -55°C to +125°C
Power Dissipation, P
T
. . . . . . . . . . . . . . . . . . . . . 0.7W
Soldering Temp. & Time . . . . . . . . . . . . . 260°C, 10 sec
*Comments
Stresses above those listed under "Absolute Maximum
Ratings" may cause permanent damage to the device.
These are stress ratings only. Functional operation of this
device at these or any other conditions above those
indicated in the operational sections of this specification
is not implied and exposure to absolute maximum rating
conditions for extended periods may affect device
reliability.
DC Electrical Characteristics
(T
A
= 0°C to + 70°C or -40º C to +85º C, VCC = 2.7V to 3.6V, GND = 0V)
Symbol
Parameter
A62L256-55LL/55LLU
Min.
I
LI
Input Leakage
Current
Output Leakage
Current
Dynamic
Operating Current
-
Typ.
-
Max.
1
A62L256-70LL/70LLU
Min.
-
Typ.
-
Max.
1
µA
V
IN
= GND to VCC
Unit
Conditions
I
LO
-
-
1
-
-
1
µA
CE = V
IH
or WE = V
IL
V
I/O
= GND to VCC
Min. Cycle, Duty = 100%
CE = V
IL
, I
I/O
= 0mA
CE = V
IL
, V
IH
= VCC
V
IL
= 0V, f = 1 MHz
I
I/O
= 0 mA
I
CC1
-
*18
25
-
**12
20
mA
I
CC2
Dynamic
Operating Current
-
1
3
-
1
3
mA
Typical values are measured at VCC = 3.0V, T
A
= 25°C and not 100% tested.
* Testing condition : T
A
= 25°C, VCC = 3.0V, Cycle Time = 55 ns
** Testing condition : T
A
= 25°C, VCC = 3.0V, Cycle Time = 70 ns
PRELIMINARY
(November, 2001, Version 1.4)
4
AMIC Technology, Inc.
A62L256 Series
DC Electrical Characteristics (continued)
Symbol
Parameter
A62L256-55LL/70LL
Min.
I
SB
Supply Current
Standby Power
I
SB1
V
OL
Output Low
Voltage
Output High
Voltage
-
-
0.05
-
2
0.3
-
-
0.05
-
5
0.3
µA
V
-
Typ.
-
Max.
50
A62L256-55LLU/70LLU
Min.
-
Typ.
-
Max.
50
µA
CE = V
IH
CE
≥
VCC - 0.2V
V
IN
≥
0V
I
OL
= 2.1mA
Unit
Conditions
V
OH
VCC - 0.3
-
-
VCC - 0.3
-
-
V
I
OH
= -1.0mA
Typical values are measured at VCC = 3.0V, T
A
= 25°C and not 100% tested.
Truth Table
Mode
Standby
Output Disable
Read
Write
Note: X: H or L
CE
H
L
L
L
OE
X
H
L
X
WE
X
H
H
L
I/O Operation
High Z
High Z
D
OUT
D
IN
Supply Current
I
SB
, I
SB1
I
CC
, I
CC1
, I
CC2
I
CC
, I
CC1
, I
CC2
I
CC
, I
CC1
, I
CC2
Capacitance
(T
A
= 25°C, f = 1.0 MHz)
Symbol
C
IN
*
C
I/O
*
Parameter
Input Capacitance
Input/Output Capacitance
Min.
Max.
6
8
Unit
pF
pF
Conditions
V
IN
= 0V
V
I/O
= 0V
These parameters are sampled and not 100% tested.
PRELIMINARY
(November, 2001, Version 1.4)
5
AMIC Technology, Inc.
