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STK10C68-S45I Datasheet

  • STK10C68-S45I

  • NVRAM (EEPROM Based)

  • 9頁

  • ETC

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STK10C68
8K x 8 nvSRAM
QuantumTrap鈩?/div>
CMOS
Nonvolatile Static RAM
FEATURES
鈥?20ns, 25ns, 35ns and 45ns Access Times
鈥?/div>
STORE
to EEPROM Initiated by Hardware
鈥?/div>
RECALL
to SRAM Initiated by Hardware or
Power Restore
鈥?Automatic
STORE
Timing
鈥?10mA Typical I
CC
at 200ns Cycle Time
鈥?Unlimited READ, WRITE and
RECALL
Cycles
鈥?1,000,000
STORE
Cycles to EEPROM
鈥?100-Year Data Retention over Full Industrial
Temperature Range
鈥?Commercial and Industrial Temperatures
鈥?28-Pin DIP and SOIC Packages
DESCRIPTION
The Simtek STK10C68 is a fast static
RAM
with a nonvol-
atile electrically erasable
PROM
(
EEPROM
) element
incorporated in each static memory cell. The
SRAM
can
be read and written an unlimited number of times, while
independent nonvolatile data resides in
EEPROM
. Data
may easily be transferred from the
SRAM
to the
EEPROM
(the
STORE
operation
), or from the
EEPROM
to the
SRAM
(the
RECALL
operation), using the NE pin.
Transfers
from the
EEPROM
to the
SRAM
(the
RECALL
operation)
also take place automatically on restoration of power.
The STK10C68 combines the high performance and ease
of use of a fast
SRAM
with nonvolatile data integrity.
The STK10C68 features industry-standard pinout for non-
volatile
RAM
s. MIL-STD-883 and Standard Military Draw-
ing (
SMD
#5962-93056) devices are also available.
BLOCK DIAGRAM
EEPROM ARRAY
128 x 512
ROW DECODER
PIN CONFIGURATIONS
NE
A
12
A
7
A
6
A
5
A
4
A
3
A
2
A
1
A
0
DQ
0
DQ
1
DQ
2
V
SS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
A
5
A
6
A
7
A
8
A
9
A
11
A
12
DQ
0
DQ
1
DQ
2
DQ
3
DQ
4
DQ
5
DQ
6
DQ
7
STORE
STATIC RAM
ARRAY
128 x 512
RECALL
V
CC
W
NC
A
8
A
9
A
11
G
A
10
E
DQ
7
DQ
6
DQ
5
DQ
4
DQ
3
28 - 300 PDIP
28 - 300 CDIP
28 - 350 SOIC
INPUT BUFFERS
COLUMN I/O
COLUMN DEC
PIN NAMES
STORE/
RECALL
CONTROL
A
0
- A
12
W
DQ
0
- DQ
7
Address Inputs
Write Enable
Data In/Out
Chip Enable
Output Enable
Nonvolatile Enable
Power (+ 5V)
Ground
A
0
A
1
A
2
A
3
A
4
A
10
E
G
NE
E
W
G
NE
V
CC
V
SS
July 1999
4-1

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