White Electronic Designs
WMS256K16-XXX
256Kx16 MONOLITHIC SRAM, SMD 5962-96902
FEATURES
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Access Times 17, 20, 25, 35ns
MIL-STD-883 Compliant Devices Available
Packaging
• 44 pin Ceramic SOJ (Package 102)
• 44 lead Ceramic Flatpack (Package 225)
• 44 lead Formed Ceramic Flatpack
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Organized as 256Kx16
Data Byte Control:
• Lower Byte (LB#) = I/O
1-8
• Upper Byte (UB#) = I/O
9-16
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2V Minimum Data Retention for battery back up
operation (WMS256K16L-XXX Low Power Version
Only)
Commercial, Industrial and Military Temperature
Range
5V Power Supply
Low Power CMOS
TTL Compatible Inputs and Outputs
A0
A1
A2
A3
A4
CS#
I/O1
I/O2
I/O3
I/O4
V
CC
GND
I/O5
I/O6
I/O7
I/O8
WE#
A5
A6
A7
A8
A9
PIN CONFIGURATION FOR WMS256K16-XXX
44 CSOJ
44 FlatpacK
TOP VIEW
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
A17
A16
A15
OE#
UB#
LB#
I/O16
I/O15
I/O14
I/O13
GND
V
CC
I/O12
I/O11
I/O10
I/O9
NC
A14
A13
A12
A11
A10
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PIN DESCRIPTION
A
0-17
LB#
UB#
I/O
1-16
CS#
OE#
WE#
V
CC
GND
NC
Address Inputs
Lower-Byte Control (I/O
1-8
)
Upper-Byte Control (I/O
9-16
)
Data Input/Output
Chip Select
Output Enable
Write Enable
+5.0V Power
Ground
No Connection
August 2004
Rev. 6
1
White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com
WEDC [ WHITE ELECTRONIC DESIGNS CORPORATION ]
