XM28C040
4 Megabit Module
XM28C040
5 Volt, Byte Alterable E2PROM
DESCRIPTION
512K x 8 Bit
TYPICAL FEATURES
The XM28C040 is a high density 4 Megabit E2PROM
comprised of four X28C010's mounted on a co-fired
multilayered ceramic substrate. Individual components
are 100% tested prior to assembly in module form and
then 100% tested after assembly.
• High Density 4 Megabit (512K x 8) Module
• Access Time of 200ns at –55°C to +125°C
• Base Memory Component: Xicor X28C010
• Pinout Conforms to JEDEC Standard for
4 Megabit E2PROM
• Fast Write Cycle Times
The XM28C040 is configured 512K x 8 bit. The module
supports a 256-byte page write operation. This com-
binedwithDATAPollingorToggleBitPolling,effectively
provides a 39µs/byte write cycle, enabling the entire
array to be rewritten in 10 seconds.
—256 Byte Page Write
• Early End of Write Detection
—DATA Polling
—Toggle Bit Polling
• Software Data Protection
• Three Temperature Ranges
—Commercial: 0°C to +75°C
—Industrial: –40° to +85°C
The XM28C040 provides the same high endurance and
data retention as the X28C010.
—Military: –55° to +125°C
• High Rel Modules all Components are
MIL-STD-883 Compliant
• Endurance: 100,000 Cycles
FUNCTIONAL DIAGRAM
PIN CONFIGURATION
X28C010
A –A
X28C010
A –A
0
16
0
16
A
A
A
A
1
2
3
4
5
6
7
8
9
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
V
18
16
15
12
CC
I/O –I/O
0
I/O –I/O
0
7
7
WE
OE
WE
CE
OE
WE
CE
A
17
A
14
A
A
A
7
6
5
4
3
2
1
0
0
1
2
13
A
8
A
9
A
A
A
11
XM28C040
A
OE
X28C010
A –A
X28C010
A –A
A
10
11
12
13
14
15
16
A
10
A –A
0
16
0
16
0
16
A
CE
A
I/O
7
I/O
6
I/O
5
I/0
4
I/O –I/O
0
I/O –I/O
0
I/O –I/O
7
7
0
7
I/O
I/O
I/O
V
OE
WE
CE
OE
WE
CE
OE
WE
CE
I/O
3
SS
A
18
A
3873 FHD F02
17
3873 FHD F01
© Xicor, Inc. 1991-1997 Patents Pending
3873-1.7 6/13/97 T1/C0/D0 SH
Characteristics subject to change without notice
1