STK12C68-5 (SMD5962-94599)
64 Kbit (8 K x 8) AutoStore nvSRAM
Features Functional Description
35 ns and 55 ns access times The Cypress STK12C68-5 is a fast static RAM with a
nonvolatile element in each memory cell. The embedded
Hands off automatic STORE on power down with external
nonvolatile elements incorporate QuantumTrap technology
68 F capacitor
producing the worlds most reliable nonvolatile memory. The
SRAM provides unlimited read and write cycles, while
STORE to QuantumTrap nonvolatile elements is initiated
independent nonvolatile data resides in the highly reliable
by software, hardware, or AutoStore on power down
QuantumTrap cell. Data transfers from the SRAM to the
RECALL to SRAM initiated by software or power up
nonvolatile elements (the STORE operation) takes place
automatically at power down. On power up, data is restored to
Unlimited Read, Write, and Recall cycles
the SRAM (the RECALL operation) from the nonvolatile
1,000,000 STORE cycles to QuantumTrap memory. Both the STORE and RECALL operations are also
available under software control. A hardware STORE is
100 year data retention to QuantumTrap
initiated with the HSB pin.
Single 5 V + 10% operation
For a complete list of related documentation, click here.
Military temperature
28-pin (300mil) CDIP and 28-pad LCC packages
Logic Block Diagram
V V
CC CAP
Quantum Trap
128 X 512
A
5
POWER
STORE CONTROL
A
6
A
7
RECALL
STORE/
STATIC RAM
A RECALL HSB
8
ARRAY
CONTROL
A 128 X 512
9
A
11
SOFTWARE
A
12
A - A
DETECT 0 12
DQ
0 COLUMN I/O
DQ
1
COLUMN DEC
DQ
2
DQ
3
DQ
4
DQ A A A A A A
5 0 1 3 4 10
2
DQ
6
DQ
7
OE
CE
WE
Cypress Semiconductor Corporation 198 Champion Court San Jose, CA 95134-1709 408-943-2600
Document Number: 001-51026 Rev. *C Revised April 2, 2015
INPUT BUFFERS ROW DECODER
STK12C68-5 (SMD5962-94599)
Contents
Pinouts .............................................................................. 3 Data Retention and Endurance ....................................... 9
Pin Definitions .................................................................. 3 Capacitance ...................................................................... 9
Device Operation .............................................................. 4 Thermal Resistance.......................................................... 9
SRAM Read ....................................................................... 4 AC Test Conditions .......................................................... 9
SRAM Write ....................................................................... 4 SRAM Read Cycle .................................................... 10
AutoStore Operation ........................................................ 4 SRAM Write Cycle..................................................... 11
AutoStore Inhibit Mode .................................................... 5 AutoStore or Power Up RECALL .................................. 12
Hardware STORE (HSB) Operation................................. 5 Software Controlled STORE/RECALL Cycle................ 13
Hardware RECALL (Power Up)........................................ 5 Switching Waveform ...................................................... 14
Software STORE............................................................... 5 Part Numbering Nomenclature...................................... 15
Software RECALL............................................................. 5 Ordering Information...................................................... 16
Data Protection ................................................................. 6 Acronyms........................................................................ 17
Noise Considerations....................................................... 6 Document Conventions ................................................. 17
Hardware Protect.............................................................. 6 Units of Measure ....................................................... 17
Low Average Active Power.............................................. 6 Document History Page ................................................ 18
Preventing Store............................................................... 6 Sales, Solutions, and Legal Information ...................... 18
Best Practices................................................................... 7 Worldwide Sales and Design Support....................... 18
Maximum Ratings............................................................. 8 Products .................................................................... 18
Operating Range .............................................................. 8 PSoC Solutions ......................................................... 18
DC Electrical Characteristics .......................................... 8
Document Number: 001-51026 Rev. *C Page 2 of 18