Cypress Semiconductor STK14C88-3 Bedienungsanleitung

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STK14C88-3
256 Kbit (32K x 8) AutoStore nvSRAM
Cypress Semiconductor Corporation 198 Champion Court San Jose, CA 95134-1709 408-943-2600
Document Number: 001-50592 Rev. *A Revised December 01, 2009
Features
35 ns and 45 ns Access Times
Automatic Nonvolatile STORE on power loss
Nonvolatile STORE under Hardware or Software control
Automatic RECALL to SRAM on power up
Unlimited Read/Write endurance
Unlimited RECALL Cycles
1,000,000 STORE Cycles
100 year Data Retention
Single 3.3V+0.3V Power Supply
Commercial and Industrial Temperatures
32-pin (300mil) SOIC and 32-pin (600 mil) PDIP packages
RoHS compliance
Functional Description
The Cypress STK14C88-3 is a 256 Kb fast static RAM with
a nonvolatile element in each memory cell. The embedded
nonvolatile elements incorporate QuantumTrap technology
producing the world’s most reliable nonvolatile memory. The
SRAM provides unlimited read and write cycles, while
independent, nonvolatile data resides in the highly reliable
QuantumTrap cell. Data transfers from the SRAM to the
nonvolatile elements (the STORE operation) takes place
automatically at power down. On power up, data is restored
to the SRAM (the RECALL operation) from the nonvolatile
memory. Both the STORE and RECALL operations are also
available under software control.
STORE/
RECALL
CONTROL
POWER
CONTROL
SOFTWARE
DETECT
STATIC RAM
ARRAY
512 X 512
Quantum Trap
512 X 512
STORE
RECALL
COLUMN I/O
COLUMN DEC
ROW DECODER
INPUT BUFFERS
OE
CE
WE
HSB
V
CC
V
CAP
A
13
- A
0
A
0
A
1
A
2
A
3
A
4
A
10
A
5
A
6
A
7
A
8
A
9
A
11
A
12
A
13
A
14
DQ
0
DQ
1
DQ
2
DQ
3
DQ
4
DQ
5
DQ
6
DQ
7
Logic Block Diagram
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Not Recommended for New Designs
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Inhaltsverzeichnis

Seite 1 - STK14C88-3

STK14C88-3256 Kbit (32K x 8) AutoStore nvSRAMCypress Semiconductor Corporation • 198 Champion Court • San Jose, CA 95134-1709 • 408-943-2600Document N

Seite 2

STK14C88-3Document Number: 001-50592 Rev. *A Page 10 of 17AC Switching Characteristics SRAM Read CycleParameterDescription35 ns 45 ns UnitMin Max Min

Seite 3

STK14C88-3Document Number: 001-50592 Rev. *A Page 11 of 17Table 3. SRAM Write CycleParameterDescription35 ns 45 ns UnitMin Max Min MaxCypressParamet

Seite 4

STK14C88-3Document Number: 001-50592 Rev. *A Page 12 of 17AutoStore or Power Up RECALLParameter Alt DescriptionSTK14C88-3UnitMin MaxtHRECALL [15]tREST

Seite 5

STK14C88-3Document Number: 001-50592 Rev. *A Page 13 of 17Software Controlled STORE/RECALL CycleThe software controlled STORE/RECALL cycle follows. [1

Seite 6

STK14C88-3Document Number: 001-50592 Rev. *A Page 14 of 17Hardware STORE CycleParameter Alt DescriptionSTK14C88-3UnitMin MaxtPHSBtHLHXHardware STORE P

Seite 7

STK14C88-3Document Number: 001-50592 Rev. *A Page 15 of 17Ordering InformationThese parts are not recommended for new designs.Speed(ns)Ordering Code P

Seite 8

STK14C88-3Document Number: 001-50592 Rev. *A Page 16 of 17Package DiagramsFigure 14. 32-Pin (300 Mil) SOIC (51-85127)Figure 15. 32-Pin (600 Mil) PDI

Seite 9

Document Number: 001-50592 Rev. *A Revised December 01, 2009 Page 17 of 17All products and company names mentioned in this document may be the tradema

Seite 10

STK14C88-3Document Number: 001-50592 Rev. *A Page 2 of 17ContentsFeatures...

Seite 11

STK14C88-3Document Number: 001-50592 Rev. *A Page 3 of 17 Pin ConfigurationsFigure 1. Pin Diagram - 32-Pin SOIC/32-Pin PDIPTable 1. Pin Definitions

Seite 12 - HRECALL

STK14C88-3Document Number: 001-50592 Rev. *A Page 4 of 17Device OperationThe STK14C88-3 nvSRAM is made up of two functionalcomponents paired in the sa

Seite 13

STK14C88-3Document Number: 001-50592 Rev. *A Page 5 of 17Hardware STORE (HSB) OperationThe STK14C88-3 provides the HSB pin for controlling andacknowle

Seite 14

STK14C88-3Document Number: 001-50592 Rev. *A Page 6 of 17Software RECALLData is transferred from the nonvolatile memory to the SRAMby a software addre

Seite 15

STK14C88-3Document Number: 001-50592 Rev. *A Page 7 of 17Best Practices nvSRAM products have been used effectively for over 15 years.While ease-of-use

Seite 16

STK14C88-3Document Number: 001-50592 Rev. *A Page 8 of 17Maximum RatingsExceeding maximum ratings may shorten the useful life of thedevice. These user

Seite 17 - Products

STK14C88-3Document Number: 001-50592 Rev. *A Page 9 of 17Data Retention and EnduranceParameter Description Min UnitDATARData Retention 100 YearsNVCNo

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