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STK11C88-S25

Description
32K x 8 nvSRAM QUANTUM TRAP CMOS NONVOLATILE STATIC RAM
File Size89KB,9 Pages
ManufacturerETC1
Download Datasheet View All

STK11C88-S25 Overview

32K x 8 nvSRAM QUANTUM TRAP CMOS NONVOLATILE STATIC RAM

STK11C88
32K x 8 nvSRAM
QuantumTrap™
CMOS
Nonvolatile Static RAM
FEATURES
• 20ns, 25ns, 35ns and 45ns Access Times
STORE
to EEPROM Initiated by Software
RECALL
to SRAM Initiated by Software or
Power Restore
• 10mA Typical I
CC
at 200ns Cycle Time
• Unlimited READ, WRITE and
RECALL
Cycles
• 1,000,000
STORE
Cycles to EEPROM
• 100-Year Data Retention in EEPROM
• Commercial and Industrial Temperatures
• 28-Pin PDIP and SOIC Packages
DESCRIPTION
The Simtek STK11C88 is a fast static
RAM
with a
nonvolatile, electrically erasable
PROM
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 transfers from the
SRAM
to the
EEPROM
(the
STORE
operation), or from
EEPROM
to
SRAM
(the
RECALL
operation), take place using a
software sequence. Transfers from the
EEPROM
to
the
SRAM
(the
RECALL
operation) also take place
automatically on restoration of power.
The STK11C88 is pin-compatible with industry-
standard
SRAM
s.
BLOCK DIAGRAM
EEPROM ARRAY
512 x 512
PIN CONFIGURATIONS
A
14
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
A
13
A
14
DQ
0
DQ
1
DQ
2
DQ
3
DQ
4
DQ
5
DQ
6
DQ
7
STORE
STATIC RAM
ARRAY
512 x 512
RECALL
STORE/
RECALL
CONTROL
SOFTWARE
DETECT
INPUT BUFFERS
COLUMN I/O
COLUMN DEC
A
0
- A
13
V
CC
W
A
13
A
8
A
9
A
11
G
A
10
E
DQ
7
DQ
6
DQ
5
DQ
4
DQ
3
ROW DECODER
28 - 300 PDIP
28 - 600 PDIP
28 - 300 SOIC
28 - 350 SOIC
PIN NAMES
A
0
- A
14
W
Address Inputs
Write Enable
Data In/Out
Chip Enable
Output Enable
Power (+5V)
Ground
A
0
A
1
A
2
A
3
A
4
A
10
G
E
W
DQ
0
- DQ
7
E
G
V
CC
V
SS
July 1999
5-1
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