1
M
All data sheets are subject to change without notice
(858) 503-3300 - Fax: (858) 503-3301- wwwmaxwell.com
4 Megabit (512k x 8-bit)
EEPROMMCM
79C0408
2004 Maxwell Technologies
All rights reserved.
10.13.04 Rev 15
Four 128k x 8-bit EEPROMs MCM
R
AD
-P
AK
radiation-hardened against natural
space radiation
Total dose hardness:
- > 100 krad (Si), depending upon space mssion
Excellent Single Event Effects
- SEL > 120 MeV/mg/cm
2
- SEU > 90 MeV/mg/cm
2
read mode
- SEU = 18 MeV/mg/cm
2
write mode
Package:
- 40 pin R
AD
-P
AK
flat pack
- 40 pin X-Ray Pak
TM
flat pack
- 40 pin Rad-Tolerant flat pack
High speed:
- 120, 150, and 200 ns maximumaccess times
available
Data Polling and Ready/Busy signal
Software data protection
Write protection by RES pin
High endurance
- 10,000 erase/write (in Page Mode),
- 10 year data retention
Page write mode: 1 to 128 byte page
Low power dissipation
- 80 mW/MHz active mode
- 440 μW standby mode
D
ESCRIPTION
:
Maxwell Technologies’ 79C0408 multi-chip module (MCM)
memory features a greater than 100 krad (Si) total dose toler-
ance, depending upon space mssion. Using Maxwell Technol-
ogies’
patented
radiation-hardened
packaging technology, the 79C0408 is the first radiation-hard-
ened 4 Megabit MCMEEPROMfor space applications. The
79C0408 uses four 1 Megabit high-speed CMOS die to yield a
4 Megabit product. The 79C0408 is capable of in-systemelec-
trical Byte and Page programmability. It has a 128 bytes Page
Programmng function to make its erase and write operations
faster. It also features Data Polling and a Ready/Busy signal to
indicate the completion of erase and programmng operations.
In the 79C0408, hardware data protection is provided with the
RES pin, in addition to noise protection on the WE signal.
Software data protection is implemented using the JEDEC
optional standard algorithm
R
AD
-P
AK
MCM
Maxwell Technologies' patented R
AD
-P
AK
packaging technol-
ogy incorporates radiation shielding in the mcrocircuit pack-
age. It elimnates the need for box shielding while providing
the required radiation shielding for a lifetime in orbit or space
mssion. In a GEO orbit, the R
AD
-P
AK
package provides
greater than 100 krad (Si) radiation dose tolerance. This prod-
uct is available with screening up to Class K.
128K x 8
128K x 8
128K x 8
128K x 8
I/O
0-7
A
0-16
WE
RB
RES
OE
CE
1
CE
2
CE
3
CE
4
F
EATURES
:
Logic Diagram