STK15C88-NF25ITR Cypress Semiconductor Corp, STK15C88-NF25ITR Datasheet

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STK15C88-NF25ITR

Manufacturer Part Number
STK15C88-NF25ITR
Description
STK15C88-NF25ITR
Manufacturer
Cypress Semiconductor Corp
Type
NVSRAMr
Datasheet

Specifications of STK15C88-NF25ITR

Format - Memory
RAM
Memory Type
NVSRAM (Non-Volatile SRAM)
Memory Size
256K (32K x 8)
Speed
25ns
Interface
Parallel
Voltage - Supply
4.5 V ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Package / Case
28-SOIC (7.5mm Width)
Word Size
8b
Organization
32Kx8
Density
256Kb
Interface Type
Parallel
Access Time (max)
25ns
Operating Supply Voltage (typ)
5V
Package Type
SOIC
Operating Temperature Classification
Industrial
Operating Supply Voltage (max)
5.5V
Operating Supply Voltage (min)
4.5V
Operating Temp Range
-40C to 85C
Pin Count
28
Mounting
Surface Mount
Supply Current
100mA
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Cypress Semiconductor Corporation
Document Number: 001-50593 Rev. *B
Features
Logic Block Diagram
25 ns and 45 ns Access Times
Pin compatible with Industry Standard SRAMs
Automatic Nonvolatile STORE on power loss
Nonvolatile STORE under 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 5V+10% Power Supply
Commercial and Industrial Temperatures
28-pin (300 mil and 330 mil) SOIC packages
RoHS Compliance
198 Champion Court
256 Kbit (32K x 8) PowerStore nvSRAM
Functional Description
The Cypress STK15C88 is a 256Kb fast static RAM with a
nonvolatile element in each memory cell. The embedded
nonvolatile elements incorporate QuantumTrap
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.
PowerStore nvSRAM products depend on the intrinsic system
capacitance to maintain system power long enough for an
automatic store on power loss. If the power ramp from 5 volts
to 3.6 volts is faster than 10 ms, consider our 14C88 or 16C88
for more reliable operation.
San Jose
,
CA 95134-1709
Revised October 8, 2010
STK15C88
408-943-2600
technology
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STK15C88-NF25ITR Summary of contents

Page 1

... Document Number: 001-50593 Rev. *B 256 Kbit (32K x 8) PowerStore nvSRAM Functional Description The Cypress STK15C88 is a 256Kb fast static RAM with a nonvolatile element in each memory cell. The embedded nonvolatile elements incorporate QuantumTrap producing the world’s most reliable nonvolatile memory. The ...

Page 2

... AC Test Conditions ............................................................ 8 AC Switching Characteristics ........................................... 9 SRAM Read Cycle ........................................................ 9 Switching Waveforms ........................................................ 9 Switching Waveforms ......................................................10 AutoStore or Power Up RECALL ....................................11 Switching Waveforms ......................................................11 Software Controlled STORE/RECALL Cycle ..................12 Part Numbering Nomenclature ........................................13 Ordering Information ........................................................13 Package Diagrams ............................................................14 Sales, Solutions and Legal Information .........................16 Worldwide Sales and Design Support......................... 16 Products ...................................................................... 16 STK15C88 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: 001-50593 Rev. *B Figure 1. Pin Diagram - 28-Pin SOIC Description STK15C88 Page [+] Feedback ...

Page 4

... RECALL request is latched. When V RESET once again exceeds the sense voltage of V cycle is automatically initiated and takes t If the STK15C88 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 ...

Page 5

... STORE CAP SWITCH operations and SRAM WRITEs are inhibited. Noise Considerations The STK15C88 is a 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 STK15C88, only the lower 14 are used to control software modes. Document Number: 001-50593 Rev – A ...

Page 7

... Max CC STORE IH IH – 0.2V). All others V < 0.2V or > Max, V < V < Max, V < V < > – STK15C88 ...................................–0.5V to Vcc + 0.5V 0-7 Ambient Temperature V CC 0°C to +70°C 4.5V to 5.5V -40°C to +85°C 4.5V to 5.5V Min Max Unit Commercial Industrial 100 ...

Page 8

... MHz 3 [4] Test Conditions Test conditions follow standard test methods and procedures for measuring thermal impedance, per EIA / JESD51. Figure 4. AC Test Loads R1 480Ω 5. 255Ω STK15C88 Min Unit 100 Years 1,000 K Max Unit 28-SOIC 28-SOIC Unit (300 mil) (330 mil) ° ...

Page 9

... WE must be HIGH during SRAM Read Cycles and LOW during SRAM WRITE cycles. 6. I/O state assumes CE and OE < V and WE > Measured ±200 mV from steady state output voltage. Document Number: 001-50593 Rev. *B Description ; device is continuously selected. IH STK15C88 Unit Min Max Min Max 25 ...

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 STK15C88 Unit Min Max 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: 001-50593 Rev. *B Description Figure 9. AutoStore/Power Up RECALL . SWITCH STK15C88 STK15C88 Unit Min Max μs 550 10 ms 3.6 V 4.0 4.5 V Page [+] Feedback ...

Page 12

... The software sequence is clocked on the falling edge of CE without involving OE (double clocking will abort the sequence). 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: 001-50593 Rev. *B [11, 12 Description Min DATA VALID STK15C88 45 ns Unit Max Min Max μ [12 STORE RECALL HIGH IMPEDANCE ...

Page 13

... Part Numbering Nomenclature STK15C88 - Ordering Information These parts are not recommended for new designs. They are in production to support ongoing production programs only. Speed Ordering Code (ns) 25 STK15C88-NF25ITR STK15C88-NF25I STK15C88-SF25ITR STK15C88-SF25I 45 STK15C88-NF45TR STK15C88-NF45 STK15C88-NF45ITR STK15C88-NF45I STK15C88-SF45ITR STK15C88-SF45I All parts are Pb-free. The above table contains Final information. Contact your local Cypress sales representative for availability of these parts Document Number: 001-50593 Rev ...

Page 14

... Package Diagrams Document Number: 001-50593 Rev. *B Figure 11. 28-Pin (300 mil) SOIC (51-85026) STK15C88 51-85026 *E Page [+] Feedback ...

Page 15

... Package Diagrams (continued) Document Number: 001-50593 Rev. *B Figure 12. 28-Pin (330 mil) SOIC (51-85058) STK15C88 51-85058 *B Page [+] Feedback ...

Page 16

... Document History Page Document Title: STK15C88 256 Kbit (32K x 8) PowerStore nvSRAM Document Number: 001-50593 Orig. of Rev. ECN No. Change ** 2625096 GVCH/PYRS *A 2826441 GVCH *B 3052511 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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