SRAM
MT5C2561
256K x 1 SRAM
PIN ASSIGNMENT
SRAM MEMORY ARRAY
(Top View)
AVAILABLE AS MILITARY
SPECIFICATIONS
• SMD 5962-88725
• SMD 5962-88544
• MIL-STD-883
24-Pin DIP (C)
(300 MIL)
A6
A7
A8
1
2
3
4
5
6
7
8
9
10
24
23
22
21
20
19
18
17
16
15
14
13
Vcc
A5
A4
A3
A2
FEATURES
A9
• High Speed: 35, 45, 55, and 70
• Battery Backup: 2V data retention
• Low power standby
A10
A11
A14
A15
A0
A1
A17
A16
A13
A12
D
• High-performance, low-power, CMOS double-metal
process
• Single +5V (+10%) Power Supply
• Easy memory expansion with CE\
• All inputs and outputs are TTL compatible
Q
WE\ 11
Vss 12
CE\
28-Pin LCC (EC)
OPTIONS
• Timing
MARKING
3
2 1 28 27
35ns access
45ns access
55ns access
70ns access
-35
-45
-55*
-70*
26
25
24
23
22
21
20
19
18
NC
A4
NC
A9
A10
A11
A14
A15
A0 10
Q 11
NC 12
4
5
6
7
8
9
A3
A2
A1
A17
A16
A13
NC
• Package(s)
13 14 15 16 17
Ceramic DIP (300 mil)
Ceramic LCC
C
EC
No. 106
No. 204
• Operating Temperature Ranges
Industrial (-40oC to +85oC)
IT
GENERAL DESCRIPTION
The Micross Components SRAM family employs
high-speed, low-power CMOS and are fabricated using double-
layer metal, double-layer polysilicon technology.
Military (-55oC to +125oC)
XT
• 2V data retention/low power
L
For flexibility in high-speed memory applications,
Micross Components offers chip enable (CE\) on all organiza-
tions. This enhancement can place the outputs in High-Z for
additional flexibility in system design. The x1 configuration
features separate data input and output.
*Electrical characteristics identical to those provided for the 45ns
access devices.
Writing to these devices is accomplished when write
enable (WE\) and CE\ inputs are both LOW. Reading is ac-
complished when WE\ remains HIGH and CE\ goes LOW. The
device offers a reduced power standby mode when disabled.
This allows system designs to achieve low standby power
requirements.
For more products and information
please visit our web site at
www.micross.com
These devices operate from a single +5V power supply
and all inputs and outputs are fully TTL compatible.
Micross Components reserves the right to change products or specifications without notice.
MT5C2561
Rev. 2.8 01/10
1