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STK14CA8
128Kx8 AutoStore nvSRAM
Cypress Semiconductor Corporation 198 Champion Court San Jose
,
CA 95134-1709 408-943-2600
Document Number: 001-51592 Rev. ** Revised March 04, 2009
Features
25, 35, 45 ns Read Access and Read/Write Cycle Time
Unlimited Read/Write Endurance
Automatic Nonvolatile STORE on Power Loss
Nonvolatile STORE Under Hardware or Software Control
Automatic RECALL to SRAM on Power Up
Unlimited RECALL Cycles
200K STORE Cycles
20-Year Nonvolatile Data Retention
Single 3.0V + 20%, -10% Operation
Commercial and Industrial Temperatures
Small Footprint SOIC and SSOP Packages (RoHS Compliant)
Description
The Cypress STK14CA8 is a 1 Mb fast static RAM with a nonvol-
atile QuantumTrap™ storage element included with each
memory cell. This SRAM provides fast access and cycle times,
ease of use, and unlimited read and write endurance of a normal
SRAM.
Data transfers automatically to the nonvolatile storage 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 Cypress nvSRAM is the first monolithic nonvolatile memory
to offer unlimited writes and reads. It is the highest performing
and most reliable nonvolatile memory available.
ROW DECODER INPUT BUFFERS
COLUMN DEC
G
E
W
COLUMN I/O
POWER
CONTROL
HSB
STORE/
RECALL
CONTROL
SOFTWARE
DETECT
A
15
– A
0
A
5
A
6
A
7
A
8
A
9
A
12
A
13
A
14
A
15
A
16
Quantum Trap
1024 X 1024
STATIC RAM
ARRAY
1024 X 1024
STORE
RECALL
DQ
0
DQ
1
DQ
2
DQ
3
DQ
4
DQ
5
DQ
6
DQ
7
A
0
A
1
A
2
A
3
A
4
A
10
A
11
V
CC
V
CAP
Logic Block Diagram
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Inhaltsverzeichnis

Seite 1 - 128Kx8 AutoStore™ nvSRAM

STK14CA8128Kx8 AutoStore™ nvSRAMCypress Semiconductor Corporation • 198 Champion Court • San Jose,CA 95134-1709 • 408-943-2600Document Number: 001-515

Seite 2

STK14CA8Document Number: 001-51592 Rev. ** Page 10 of 16Mode SelectionE W G A16-A0Mode I/O Power NotesH X X X Not Selected Output High Z StandbyL H L

Seite 3

STK14CA8Document Number: 001-51592 Rev. ** Page 11 of 16nvSRAM OperationnvSRAMThe STK14CA8 nvSRAM has two functional components pairedin the same phys

Seite 4

STK14CA8Document Number: 001-51592 Rev. ** Page 12 of 16Software STOREData can be transferred from the SRAM to the nonvolatilememory by a software add

Seite 5

STK14CA8Document Number: 001-51592 Rev. ** Page 13 of 16Low Average Active PowerCMOS technology provides the STK14CA8 with the benefit ofpower supply

Seite 6

STK14CA8Document Number: 001-51592 Rev. ** Page 14 of 16Ordering InformationOrdering CodesPacking OptionBlank=TubeTR=Tape and ReelTemperature RangeBla

Seite 7

STK14CA8Document Number: 001-51592 Rev. ** Page 15 of 16Package DiagramsFigure 17. 32-Pin 300 mil SOIC (51-85127)Figure 18. 48-Pin 300 mil SSOP (51-

Seite 8

Document Number: 001-51592 Rev. ** Revised March 04, 2009 Page 16 of 16AutoStore and QuantumTrap are registered trademarks of Cypress Semiconductor Co

Seite 9

STK14CA8Document Number: 001-51592 Rev. ** Page 2 of 16PinoutsFigure 1. 48-Pin SSOP Figure 2. 32-Pin SOICFigure 3. Relative PCB Area Usage[1]Pin De

Seite 10 - STK14CA8

STK14CA8Document Number: 001-51592 Rev. ** Page 3 of 16Absolute Maximum RatingsVoltage on Input Relative to Ground...–0.5V to 4.1VVoltag

Seite 11

STK14CA8Document Number: 001-51592 Rev. ** Page 4 of 16AC Test ConditionsInput Pulse Levels ...0V to

Seite 12 - Best Practices

STK14CA8Document Number: 001-51592 Rev. ** Page 5 of 16SRAM READ Cycles #1 and #2Figure 6. SRAM READ Cycle #1: Address Controlled[3, 4, 6]Figure 7.

Seite 13 - Low Average Active Power

STK14CA8Document Number: 001-51592 Rev. ** Page 6 of 16SRAM WRITE Cycles #1 and #2Figure 8. SRAM WRITE Cycle #1: W Controlled[7,8]Figure 9. SRAM WRI

Seite 14

STK14CA8Document Number: 001-51592 Rev. ** Page 7 of 16AutoStore/POWER UP RECALLtFigure 10. AutoStore/POWER UP RECALLNote Read and Write cycles are i

Seite 15

STK14CA8Document Number: 001-51592 Rev. ** Page 8 of 16Software Controlled STORE/RECALL CycleFigure 11. Software STORE/RECALL CYCLE: E Controlled[13]

Seite 16

STK14CA8Document Number: 001-51592 Rev. ** Page 9 of 16Hardware STORE CycleFigure 13. Hardware STORE CycleSoft Sequence CommandsFigure 14. Software

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