White Electronic Designs
512Kx16 CMOS EEPROM MODULE
FEATURES
Access Time of 140, 150, 200ns
Packaging:
• 68 lead, 40mm Hermetic CQFP (Package 501)
Organized as 4 banks of 128Kx16
Write Endurance 10,000 Cycles
Data Retention Ten Years Minimum
Military Temperature Range
Low Power CMOS
Automatic Page Write Operation
WE512K16-XG4X
Page Write Cycle Time: 10ms Max
Data Polling for End of Write Detection
Hardware and Software Data Protection
TTL Compatible Inputs and Outputs
5 Volt Power Supply
8 Built-in Decoupling Caps and Multiple Ground Pins for Low
Noise Operation
Weight - 20 grams typical
FIGURE 1 – PIN CONFIGURATION
Top View
NC
A
0
A
1
A
2
A
3
A
4
A
5
CS
1
#
GND
CS
3
#
WE#
A
6
A
7
A
8
A
9
A
10
V
CC
Pin Description
I/O0-15
A0-16
WE#
CS1-4#
OE#
V
CC
GND
NC
Data Input/Output
Address Inputs
Write Enable
Chip Selects
Output Enable
+5.0V Power
Ground
Not Connected
9 8 7 6 5 4 3 2 1 68 67 66 65 64 63 62 61
I/O
0
I/O
1
I/O
2
I/O
3
I/O
4
I/O
5
I/O
6
I/O
7
GND
I/O
8
I/O
9
I/O
10
I/O
11
I/O
12
I/O
13
I/O
14
I/O
15
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
NC
NC
INC
NC
NC
NC
NC
NC
GND
NC
NC
NC
NC
NC
NC
NC
NC
Block Diagram
CS
1
#
CS
2
#
CS
3
#
CS
4
#
A
0-16
OE#
WE#
128K x 8
128K x 8
128K x 8
128K x 8
128K x 8
128K x 8
128K x 8
128K x 8
V
CC
A
11
A
12
A
13
A
14
A
15
A
16
CS
2
#
OE#
CS
4
#
NC
NC
NC
NC
NC
NC
NC
I/O
0-7
I/O
8-15
NOTE: CS
1-4
# are used as bank selects. During reads, only one CSx#
can be active at one time.
White Electronic Designs Corp. reserves the right to change products or specifications without notice.
April 1999
Rev. 2
1
White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com
WEDC [ WHITE ELECTRONIC DESIGNS CORPORATION ]
