STK10C68-M
STK10C68-M
CMOS nvSRAM
High Performance
8K x 8 Nonvolatile Static RAM
MIL-STD-833/SMD 5962 - 93056
FEATURES
DESCRIPTION
The Simtek STK10C68-M is a fast static RAM (35, 45
and55ns),withanonvolatileelectrically-erasablePROM
(EEPROM)elementincorporatedineachstaticmemory
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 (STORE), or from the
EEPROM to the SRAM (RECALL) using the NE pin. It
combines the high performance and ease of use of a
fast SRAM with nonvolatile data integrity.
• 35, 45 and 55ns Access Times
• 20 and 25ns Output Enable Access
• Unlimited Read and Write to SRAM
• Hardware STORE Initiation
• Automatic STORE Timing
• 100,000 STORE cycles to EEPROM
• 10 year data retention in EEPROM
• Automatic RECALL on Power Up
• Hardware RECALL Initiation
The STK10C68 features industry standard pinout for
• Unlimited RECALL cycles from EEPROM
• Single 5V±10% Operation
nonvolatile RAMs in a 28-pin 300 mil ceramic DIP, and
28-pad LCC packages. Commercial and industrial
temperature devices are also available.
• Available in multiple standard packages
PIN CONFIGURATIONS
LOGIC BLOCK DIAGRAM
EEPROM ARRAY
256 x 256
1
28
NE
VCC
W
3
2
28 27
26
2
3
27
26
A12
A 7
A 6
A 5
A 4
A 3
1
4
5
A 6
A 5
NC
A 8
A 9
A11
G
NC
A 8
A 9
A11
G
25
24
23
22
21
A 3
25
24
4
5
6
A 4
A 3
A 2
A 1
STORE
A 4
7
23
22
6
7
8
A5
TOP VIEW
RECALL
STATIC RAM
9
8
9
21
20
A10
A 2
A 1
A 0
A 10
E
A 6
10
20
19
18
A 0
DQ0
DQ1
E
ARRAY
10
11
19
18
DQ 7
DQ 6
11
12
DQ7
DQ6
A 7
DQ
256 x 256
0
17
16
15
12
13
14
13 14 15 16 17
DQ
DQ
DQ 5
A 8
A 9
A12
1
2
DQ
4
VSS
DQ 3
28-LCC
28-300 CDIP
DQ 0
COLUMN I/O
STORE/
RECALL
DQ 1
PIN NAMES
12
CONTROL
DQ 2
COLUMN DECODER
A
- A
Address Inputs
0
DQ 3
W
Write Enable
Data In/Out
DQ - DQ
0
DQ 4
DQ 5
7
E
Chip Enable
Output Enable
Nonvolatile Enable
Power (+5V)
Ground
A 0
A 1
A 2
A 10 A 11
G
G
DQ 6
DQ 7
NE
NE
V
CC
E
V
SS
W
4-11
SIMTEK [ SIMTEK CORPORATION ]
