WS512K16-XXX
White Electronic Designs
ADVANCED*
512Kx16 SRAM MODULE
FEATURES
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Data I/O Compatible with 3.3V devices
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Access Times 17, 20, 25, 35ns
2V Minimum Data Retention for battery back up
operation
MIL-STD-883 Compliant Devices Available
Packaging
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Commercial, Industrial and Military Temperature
Range
• 44 pin Ceramic SOJ (Package 102)
• 44 lead Ceramic Flatpack (Package 209)
Organized as two banks of 256Kx16
Data Byte Control:
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5 Volt Power Supply (3.3V parts also available)
Low Power CMOS
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TTL Compatible Inputs and Outputs
Lower Byte (LB#) = I/O1-8
Upper Byte (UB#) = I/O9-16
* This product is under development, is not qualified or characterized and is subject to
change or cancellation without notice.
PIN CONFIGURATION FOR WS512K16-XXX
Pin Description
44 CSOJ
A0-17
LB#
UB#
I/O1-16
CS1-2#
OE#
WE#
VCC
Address Inputs
Lower-Byte Control (I/O1-8)
Upper-Byte Control (I/O9-16)
Data Input/Output
Chip Select
44 FLATPACK
Top View
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
1
2
3
4
5
6
7
8
A0
A1
A2
A3
A4
A17
A16
A15
Output Enable
Write Enable
+5.0V Power
Ground
OE#
UB#
LB#
I/O16
I/O15
I/O14
I/O13
GND
VCC
I/O12
I/O11
I/O10
I/O9
CS2#
A14
CS1#
I/O1
I/O2
I/O3
I/O4
VCC
GND
I/O5
I/O6
I/O7
I/O8
WE#
A5
GND
NC
No Connection
9
10
11
12
13
14
15
16
17
18
19
20
21
22
Block Diagram
A
0-17
WE#
OE#
UB#
LB#
A6
A7
A8
A9
A13
A12
A11
A10
256K x 16
256K x 16
CS1#
CS2#
I/O1-16
White Electronic Designs Corp. reserves the right to change products or specifications without notice.
April 1998
1
White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com