STK11C68 (SMD5962–92324)
8Kx8 SoftStore nvSRAM
FEATURES
• 25, 35, 45, and 55 ns Read Access & R/W Cycle
Times
• Unlimited Read/Write Endurance
• Pin compatible with Industry Standard SRAMs
• Software-initiated Non-Volatile
STORE
• Automatic
RECALL
to SRAM on Power Up
• Unlimited RECALL cycles
• 1 Million
STORE
Cycles
• 100-Year Non-volatile Data Retention
• Single 5V + 10% Operation
• Commercial, Industrial, and Military Tempera-
tures
• 28 pin 330 mil SOIC (RoHS-Compatible)
• 28-pin CDIP and LCC packages
DESCRIPTION
The Simtek STK11C68 is a 64Kb fast static RAM
with a nonvolatile Quantum Trap storage element
included with each memory cell.
The SRAM provides the fast access & cycle times,
ease of use, and unlimited read & write endurance
of a normal SRAM.
Data transfers under software control to the non-vol-
atile storage cells (the
STORE
operation). On
power-up, data is automatically restored to the
SRAM (the
RECALL
operation). RECALL operations
are also available under software control.
The Simtek nvSRAM is the first monolithic non-
volatile memory to offer unlimited writes and reads.
It is the highest performance, most reliable non-
volatile memory available.
BLOCK DIAGRAM
BLOCK DIAGRAM
QUANTUM TRAP
128 x 512
ROW DECODER
A
5
A
6
A
7
A
8
A
9
A
11
A
12
STORE
STATIC RAM
ARRAY
128 X 512
RECALL
STORE/
RECALL
CONTROL
SOFTWARE
DETECT
DQ
0
DQ
1
DQ
2
DQ
3
DQ
4
DQ
5
DQ
6
DQ
7
A
0
– A
12
INPUT BUFFERS
COLUMN I/O
COLUMN DEC
A
0
A
1
A
2
A
3
A
4
A
10
G
E
W
This product conforms to specifications per the
terms of Simtek standard warranty. The product
has completed Simtek internal qualification testing
and has reached production status.
1
Document Control #ML0007 Rev 0.3
February, 2007
SIMTEK [ SIMTEK CORPORATION ]
