STK14EC16
Preliminary
FEATURES
• 15, 25, 45 ns Read Access and R/W Cycle Time
• Unlimited Read/Write Endurance
• Automatic Non-volatile STORE on Power Loss
• Non-Volatile STORE Under Hardware or Software
Control
• Automatic RECALL to SRAM on Power Up
• Unlimited RECALL Cycles
• 200K STORE Endurance
• 20-Year Non-volatile Data Retention
• Single 3.0V +20%, -10% Operation
• Commercial, Industrial Temperatures
• 44-pin or 54-pin 400-mil TSOPII Packages (RoHS-
Compliant)
• 48-ball Fine Pitch Ball Grid Array (FBGA)
256Kx16 AutoStore nvSRAM
DESCRIPTION
The Simtek STK14EC16 is a 4MB fast static RAM
with a non-volatile 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 automatically to the non-volatile stor-
age cells when power loss is detected (the
STORE
operation). On power up, data is automatically
restored to the SRAM (the
RECALL
operation). Both
STORE and RECALL operations are also available
under software control.
The Simtek nvSRAM is the highest performance,
most reliable non-volatile memory available.
BLOCK DIAGRAM
A
0
A
1
A
2
A
3
A
4
A
5
A
6
A
7
A
8
A
17
DQ
0
DQ
1
DQ
2
DQ
3
DQ
4
DQ
5
DQ
6
DQ
7
DQ
8
DQ
9
DQ
10
DQ
11
DQ
12
DQ
13
DQ
14
DQ
15
Row Decoder
EEPROM Array
2048 x 2048
STORE
SRAM
Array
2048 x 2048
Store/
Recall
Control
RECALL
Power
Control
V
CC
V
CAP
HSB
Input Buffers
Software
Detect
A0 - A17
Column I/O
Column Decoder
G
W
A
9
A
10
A
11
A
12
A
13
A
14
A
15
A
16
E
UB
Pachuco Boys
LB
This is a product in development that has fixed tar-
get specifications that are subject to change pend-
ing characterization results.
SIMTEK Confidential & Proprietary
1
Document Control #ML0061 Rev 1.1
Jan, 2008