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All data sheets are subject to change without notice
(858) 503-3300 - Fax: (858) 503-3301 - www.maxwell.com
20 Megabit (512K x 40-Bit)
EEPROM MCM
79C2040
©2005 Maxwell Technologies
All rights reserved.
04.20.05Rev 1
FEATURES:
512k x 40-bit EEPROM MCM
•RAD-PAK® radiation-hardened against natural
space radiation
Total dose hardness:
- >100 krad (Si)
- Dependent upon orbit
Excellent Single event effects
- SEL
TH
> 120 MeV/mg/cm
2
- SEU > 90 MeV/mg/cm
2
read mode
- SEU = 18 MeV/mg/cm
2
write mode
High endurance
- 10,000 cycles/byte (Page Programming Mode)
- 10 year data retention
Page Write Mode: 128 Dword Page
High Speed:
- 150 and 200 ns maximum access times
Automatic programming
- 10 ms automatic Page/Dword write
Low power dissipation
- 375 mW/MHz active current
-3. 2 mW standby current
DESCRIPTION:
Maxwell Technologies’ 79C2040 multi-chip module (MCM)
memory features a greater than 100 krad (Si) total dose toler-
ance, dependent upon orbit. Using Maxwell Technologies’ pat-
ented radiation-hardened RAD-PAK® MCM packaging
technology, the 79C2040 is the first radiation-hardened 20
megabit MCM EEPROM for space application. The 79C2040
uses twenty 1 Megabit high speed CMOS die to yield a 20
megabit product. The 79C2040 is capable of in-system electri-
cal byte and page programmability. It has a 128 word page
programming function to make the erase and write operations
faster. It also features Data Polling and a Ready/Busy signal to
indicate the completion of erase and programming operations.
In the 79C2040, hardware data protection is provided with the
RES pin, in addition to noise protection on the WE signal and
write inhibit on power on and off. Software data protection is
implemented using the JEDEC optional standard algorithm.
Maxwell Technologies' patented RAD-PAK® packaging technol-
ogy incorporates radiation shielding in the microcircuit pack-
age. It eliminates the need for box shielding while providing
the required radiation shielding for a lifetime in orbit or space
mission. In a GEO orbit, RAD-PAK provides greater than 100
krad (Si) radiation dose tolerance. This product is available
with screening up to Maxwell Technologies self-defined Class
K
Logic Diagram