STK16C88-3WF35I Cypress Semiconductor Corp, STK16C88-3WF35I Datasheet

STK16C88-3WF35I

STK16C88-3WF35I

Manufacturer Part Number
STK16C88-3WF35I
Description
STK16C88-3WF35I
Manufacturer
Cypress Semiconductor Corp
Datasheet

Specifications of STK16C88-3WF35I

Format - Memory
RAM
Memory Type
NVSRAM (Non-Volatile SRAM)
Memory Size
256K (32K x 8)
Speed
35ns
Interface
Parallel
Voltage - Supply
4.5 V ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Package / Case
28-DIP (0.600", 15.24mm)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
STK16C88-3WF35I
Manufacturer:
FREESCALE
Quantity:
101
Cypress Semiconductor Corporation
Document Number: 001-50594 Rev. *A
Features
Fast 35 ns Read Access and R/W Cycle Time
Directly replaces Battery-backed SRAM Modules such as
Dallas/Maxim DS1230W
Automatic Nonvolatile STORE on Power Loss
Nonvolatile STORE under Software Control
Automatic RECALL to SRAM on power up
Unlimited Read/Write Endurance
1,000,000 STORE Cycles
100 year Data Retention
Single 3.3V+0.3V Power Supply
Commercial and Industrial Temperatures
28-pin (600 mil) PDIP package
RoHS Compliance
Logic Block Diagram
198 Champion Court
256 Kbit (32K x 8) AutoStore+ nvSRAM
Functional Description
The Cypress STK16C88-3 is a 256Kb 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.
San Jose
,
CA 95134-1709
Revised December 11, 2009
STK16C88-3
408-943-2600
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Related parts for STK16C88-3WF35I

STK16C88-3WF35I Summary of contents

Page 1

... Document Number: 001-50594 Rev. *A 256 Kbit (32K x 8) AutoStore+ nvSRAM Functional Description The Cypress STK16C88 256Kb 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 ...

Page 2

... Thermal Resistance ............................................................. 8 AC Test Conditions ............................................................. 8 AC Switching Characteristics ............................................ 9 SRAM Read Cycle ......................................................... 9 Switching Waveforms ......................................................... 9 AutoStorePlus or Power Up RECALL .............................. 11 Software Controlled STORE/RECALL Cycle ................... 12 Part Numbering Nomenclature ......................................... 13 Ordering Information ......................................................... 13 Package Diagrams ............................................................. 14 Sales, Solutions and Legal Information .......................... 15 Worldwide Sales and Design Support.......................... 15 Products ....................................................................... 15 STK16C88-3 Page [+] Feedback ...

Page 3

... Deasserting OE HIGH causes the I/O pins to tristate. V Ground Ground for the Device. The device is connected to ground of the system Power Supply Power Supply Inputs to the Device. CC Document Number: 001-50594 Rev. *A Figure 1. Pin Diagram - 28-Pin PDIP Description STK16C88-3 Page [+] Feedback ...

Page 4

... V CC RECALL cycle is automatically initiated and takes t complete. Document Number: 001-50594 Rev the STK16C88 WRITE state at the end of power up RECALL, the SRAM data is corrupted. To help avoid this situation Kohm resistor is connected either between WE and system V or between CE and system V ...

Page 5

... When V <V , all externally initiated STORE CAP SWITCH operations and SRAM WRITEs are inhibited. Noise Considerations The STK16C88 high speed memory. It must have a high frequency bypass capacitor of approximately 0.1 µF connected between V and V using leads and traces that are as short CC SS, as possible ...

Page 6

... L H Notes 1. The six consecutive addresses must be in the order listed. WE must be high during all six consecutive CE controlled cycles to enable a nonvolatile cycle. 2. While there are 15 addresses on the STK16C88-3, only the lower 14 are used to control software modes. Document Number: 001-50594 Rev – A ...

Page 7

... CE > – 0.2V). All others V < 0.2V or > Max, V < V < Max, V < V < > – Description STK16C88-3 ...................................–0.5V to Vcc + 0.5V 0-7 Ambient Temperature V CC 0°C to +70°C 3.0V to 3.6V -40°C to +85°C 3.0V to 3.6V Min Max Unit Commercial 50 mA Industrial Commercial ...

Page 8

... MHz 3 [4] Test Conditions Test conditions follow standard test methods and proce- dures for measuring thermal impedance, per EIA / JESD51. Figure 4. AC Test Loads R1 317Ω 3. 351Ω STK16C88-3 Max Unit 28-PDIP Unit °C/W TBD °C/W TBD Page [+] Feedback ...

Page 9

... Address Access Time Output Enable to Data Valid Output Hold After Address Change Chip Enable to Output Active Chip Disable to Output Inactive Output Enable to Output Active Output Disable to Output Inactive Chip Enable to Power Active Chip Disable to Power Standby ; device is continuously selected. IH STK16C88 Unit Min Max ...

Page 10

... Address Setup to End of Write Address Setup to Start of Write Address Hold After End of Write Write Enable to Output Disable Output Active After End of Write SCE PWE t SD DATA VALID t HZWE HIGH IMPEDANCE SCE PWE t SD DATA VALID HIGH IMPEDANCE STK16C88 Unit Min Max [ ...

Page 11

... Low Voltage Reset Level RESET V Low Voltage Trigger Level SWITCH Switching Waveforms Note 10. t starts from the time V rises above V HRECALL CC Document Number: 001-50594 Rev. *A Description Figure 9. AutoStorePlus/Power Up RECALL . SWITCH STK16C88-3 STK16C88-3 Unit Min Max μs 550 10 ms 500 ns 2.4 V 2.7 2.95 V Page [+] Feedback ...

Page 12

... The six consecutive addresses must be read in the order listed in the Mode Selection table. WE must be HIGH during all six consecutive cycles. Document Number: 001-50594 Rev. *A [11, 12] Description STORE/RECALL Initiation Cycle Time Address Setup Time Clock Pulse Width Address Hold Time RECALL Duration STK16C88 Min Max [12 ...

Page 13

... These parts are not recommended for new designs. They are in production to support ongoing production programs only. Speed (ns) Ordering Code 35 STK16C88-3WF35 STK16C88-3WF35I All parts are Pb-free. The above table contains Final information. Please contact your local Cypress sales representative for availability of these parts Document Number: 001-50594 Rev. *A Temperature Range: Blank - Commercial (0 to 70° Industrial (-40 to 85°C) ...

Page 14

... Package Diagram Document Number: 001-50594 Rev. *A Figure 11. 28-Pin (600 Mil) PDIP (51-85017) STK16C88-3 51-85017 *C Page [+] Feedback ...

Page 15

... Document History Page Document Title: STK16C88-3 256 Kbit (32K x 8) AutoStore+ nvSRAM Document Number: 001-50594 Orig. of Rev. ECN No. Change ** 2625096 GVCH/PYRS *A 2826441 GVCH Sales, Solutions and Legal Information Worldwide Sales and Design Support Cypress maintains a worldwide network of offices, solution centers, manufacturer’s representatives, and distributors. To find the office closest to you, visit us at cypress ...

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