28C256T Datasheet PDF - Maxwell Technologies
| Part Number | 28C256T | |
| Description | 256K EEPROM (32K x 8-Bit) EEPROM | |
| Manufacturers | Maxwell Technologies | |
| Logo |  |
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There is a preview and 28C256T download ( pdf file ) link at the bottom of this page. Total 14 Pages | ||
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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.
|
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256K EEPROM (32K x 8-Bit) EEPROM
28C256T
TABLE 8. 28C256T AC ELECTRICAL CHARACTERISTICS FOR PAGE/BYTE ERASE AND WRITE OPERATIONS
(VCC = 5V ±10%, TA = -55 TO 125 °C UNLESS OTHERWISE SPECIFIED)
PARAMETER
SUBGROUPS
SYMBOL
MIN1
TYP
MAX UNITS
WE Pulse Width
-120
-150
CE Pulse Width
-120
-150
9, 10, 11
tWP 2
ns
200 --
--
250 --
--
tCW 3
200
--
--
250 --
--
Address Hold Time
-120
www.DataShee-t145U0.com
Data Setup Time
-120
-150
9, 10, 11
tAH
ns
150 --
--
150 --
--
9, 10, 11
tDS
ns
75 --
--
100 --
--
Data Hold Time
-120
-150
9, 10, 11
tDH
ns
10 --
--
10 --
--
Chip Enable Hold Time2
-120
-150
9, 10, 11
tCH
ns
0 -- --
0 -- --
Output Enable to Write Setup Time
-120
-150
9, 10, 11
tOES
ns
0 -- --
0 -- --
Output Enable Hold Time
-120
-150
Data Latch Time4
-120
-150
9, 10, 11
tOEH
0 -- --
0 -- --
9, 10, 11
tDL
-- 230 --
-- 280 --
ns
ns
Write Cycle Time
-120
-150
9, 10, 11
tWC
--
--
ms
-- 10
-- 10
Byte Load Window4
-120
-150
9, 10, 11
tBL
-- 100 --
-- 100 --
us
Byte Load Cycle4
-120
-150
9, 10, 11
tBLC
us
0.55 --
30
0.55 --
30
Write Start Time
-120
-150
9, 10, 11
tDW
ns
150 --
--
150 --
--
1. Use this device in a longer cycle than this value.
2. WE controlled operation.
3. CE controlled operation.
4. Not tested.
02.18.02 Rev5
All data sheets are subject to change without notice 5
©2001 Maxwell Technologies
All rights reserved.
Preview 5 Page |
Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for 28C256T electronic component. |
| Information | Total 14 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ 28C256T.PDF Datasheet ] | |
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