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PDF ( 数据手册 , 数据表 ) 28C256T

零件编号 28C256T
描述 256K EEPROM (32K x 8-Bit) EEPROM
制造商 Maxwell Technologies
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28C256T 数据手册, 描述, 功能
28C256T
256K EEPROM (32K x 8-Bit)
EEPROM
www.DataSheet4U.com
VCC
GND
OE
WE
CE
ADDRESS
INPUTS
DATA INPUTS/OUTPUTS
I/O0 - I/O7
OE, CE, and WE
LOGIC
Y DECODER
X DECODER
Logic Diagram
DATA LATCH
INPUT/OUTPUT
BUFFERS
Y-GATING
CELL MATRIX
IDENTIFICATION
FEATURES:
• RAD-PAK® radiation-hardened against natural space radia-
tion
• Total dose hardness:
- > 100 Krad (Si), dependent upon space mission
• Excellent Single Event Effects:
- SELTH LET: > 120 MeV/mg/cm2
- SEUTH LET (read mode): > 90 MeV/mg/cm2
- SEUTH LET (write mode): > 18 MeV/mg/cm2
• Package:
- 28 pin RAD-PAK® flat pack
- 28 pin RAD-PAK® DIP
- JEDEC approved byte wide pinout
• High Speed:
- 120, 150 ns maximum access times available
• High endurance:
- 10,000 erase/write (in Page Mode), 10-year data
retention
• Page Write Mode:
- 1 to 64 bytes
• Low power dissipation:
- 15 mA active current (cycle = 1 µ s)
- 20 µ A standby current (CE = VCC)
DESCRIPTION:
Maxwell Technologies’ 28C256T high density 256k-bit
EEPROM microcircuit features a greater than 100 krad (Si)
total dose tolerance, depending upon space mission. The
28C256T is capable of in-system electrical byte and page pro-
grammability. It has a 64-Byte page programming function to
make its erase and write operations faster. It also features
data polling to indicate the completion of erase and program-
ming operations.
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 Class S.
02.18.02 Rev 5
(858) 503-3300 - Fax: (858) 503-3301- www.maxwell.com
All data sheets are subject to change without notice 1
©2001 Maxwell Technologies
All rights reserved.







28C256T pdf, 数据表
256K EEPROM (32K x 8-Bit) EEPROM
28C256T
FIGURE 3. BYTE WRITE TIMING WAVEFORM (2) (CE CONTROLLED)
www.DataSheet4U.com
FIGURE 4. PAGE WRITE TIMING WAVEFORM (1) (WE CONTROLLED)
02.18.02 Rev5
All data sheets are subject to change without notice 8
©2001 Maxwell Technologies
All rights reserved.














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