STK11C68-C20 ETC [List of Unclassifed Manufacturers], STK11C68-C20 Datasheet

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STK11C68-C20

Manufacturer Part Number
STK11C68-C20
Description
Manufacturer
ETC [List of Unclassifed Manufacturers]
Datasheet
FEATURES
• 20ns, 25ns, 35ns and 45ns Access Times
• STORE to EEPROM Initiated by Software
• RECALL to SRAM Initiated by Software or
• 10mA Typical I
• Unlimited READ, WRITE and RECALL Cycles
• 1,000,000 STORE Cycles to EEPROM
• 100-Year Data Retention over Full Industrial
• Commercial and Industrial Temperatures
• 28-Pin DIP and SOIC Packages
BLOCK DIAGRAM
DQ
DQ
DQ
DQ
DQ
DQ
DQ
DQ
June 1999
A
A
A
A
A
A
A
Power Restore
Temperature Range
5
6
7
8
9
11
12
0
1
2
3
4
5
6
7
CC
at 200ns Cycle Time
A
0
COLUMN DEC
STATIC RAM
COLUMN I/O
A
128 x 512
1
ARRAY
A
2
A
3
EEPROM ARRAY
A
4
128 x 512
A
10
STORE
RECALL
CONTROL
RECALL
STORE/
4-21
SOFTWARE
DETECT
DESCRIPTION
The Simtek STK11C68 is a fast static
nonvolatile, electrically erasable
incorporated in each static memory cell. The
can be read and written an unlimited number of
times, while independent nonvolatile data resides in
the
EEPROM
SRAM
software sequence. Transfers from the
the
automatically on restoration of power.
The STK11C68 is pin-compatible with industry-
standard
available (STK11C68-M).
Nonvolatile Static RAM
QuantumTrap™ CMOS
EEPROM
SRAM
G
E
W
(the
(the
SRAM
(the
A
RECALL
. Data transfers from the
0
- A
STORE
12
RECALL
s. MIL-STD-883 device is also
8K x 8 nvSRAM
operation), take place using a
PIN CONFIGURATIONS
DQ
DQ
DQ
PIN NAMES
V
operation), or from
A
NC
A
A
A
A
A
A
A
A
SS
STK11C68
12
2
7
6
5
4
3
1
0
0
2
1
A
W
DQ
E
G
V
V
0
CC
SS
operation) also take place
1
2
3
4
5
6
7
8
9
10
11
12
13
14
- A
0
- DQ
12
7
28
27
26
25
24
23
22
21
20
19
18
17
16
15
DQ
V
A
A
A
G
A
E
DQ
DQ
DQ
DQ
W
NC
Address Inputs
Write Enable
Data In/Out
Chip Enable
Output Enable
Power (+ 5V)
Ground
PROM
CC
8
9
11
10
7
6
5
4
3
SRAM
RAM
EEPROM
EEPROM
28 - 300 PDIP
28 - 300 CDIP
28 - 350 SOIC
element
with a
to the
SRAM
to
to

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STK11C68-C20 Summary of contents

Page 1

... June 1999 STK11C68 nvSRAM QuantumTrap™ CMOS Nonvolatile Static RAM DESCRIPTION The Simtek STK11C68 is a fast static nonvolatile, electrically erasable incorporated in each static memory cell. The can be read and written an unlimited number of times, while independent nonvolatile data resides in the . Data transfers from the ...

Page 2

... Output Logic “1” Voltage OH V Output Logic “0” Voltage OL T Operating Temperature A Note b: The STK11C68-20 requires V = 5.0V 5% supply to operate at specified speed. CC Note c: I and I are dependent on output loading and cycle rate. The specified values are obtained with outputs unloaded ...

Page 3

... AVAV 3 t AVQV 5 t AXQX DATA VALID AVAV 1 t ELQV 6 t ELQX 4 t GLQV 8 t GLQX 10 ACTIVE 4-23 STK11C68 (V = 5.0V + 10%) CC STK11C68-35 STK11C68-45 UNITS MAX MIN MAX MIN MAX ...

Page 4

... DATA VALID 20 t WLQZ HIGH IMPEDANCE AVAV 14 t ELEH 17 t AVEH 13 t WLEH 15 t DVEH DATA VALID HIGH IMPEDANCE 4- 5.0V + 10%) CC STK11C68-35 STK11C68-45 UNITS MAX MIN MAX MIN MAX ...

Page 5

... CC BELOW V June 1999 PARAMETER . SWITCH BROWN OUT STORE INHIBIT NO RECALL DID NOT GO (V DID NOT BELOW V ) RESET RESET 4-25 STK11C68 5.0V + 10%) CC STK11C68 UNITS NOTES MIN MAX 550 4.0 4.5 V 3.9 V BROWN OUT STORE INHIBIT RECALL WHEN V RETURNS CC ABOVE V SWITCH ...

Page 6

... STK11C68-20 STK11C68-25 STK11C68-35 MIN MAX MIN MAX MIN AVAV ADDRESS # STORE HIGH IMPEDANCE DATA VALID 4-26 NOTES 5.0V 10%) CC STK11C68-45 UNITS MAX MIN MAX RECALL ...

Page 7

... The STK11C68 is a versatile memory chip that pro- vides several modes of operation. The STK11C68 can operate as a standard shadow to which the EEPROM tion can be copied or from which the updated in nonvolatile mode. NOISE CONSIDERATIONS Note that the STK11C68 is a high-speed memory and so must have a high-frequency bypass capaci- tor of approximately 0 ...

Page 8

... Figure 3 shows the same relationship for cycles. If the chip enable duty cycle is less WRITE than 100%, only standby current is drawn when the chip is disabled. The overall average current drawn by the STK11C68 depends on the following items: 1) vs. CMOS chip enable; 3) the overall cycle rate for accesses; ...

Page 9

... STK11C68 June 1999 ORDERING INFORMATION - Temperature Range Blank = Commercial (0 to 70˚ Industrial (–40 to 85˚C Access Time 20 = 20ns (Commercial only 25ns 35 = 35ns 45 = 45ns Package P = Plastic 28-pin 300 mil DIP C = Ceramic 28-pin 300 mil DIP S = Plastic 28-pin 350 mil SOIC 4-29 STK11C68 ) ...

Page 10

... STK11C68 June 1999 4-30 ...

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