STK15C88N35I Cypress Semiconductor Corp, STK15C88N35I Datasheet

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STK15C88N35I

Manufacturer Part Number
STK15C88N35I
Description
Manufacturer
Cypress Semiconductor Corp
Type
NVSRAMr
Datasheet

Specifications of STK15C88N35I

Word Size
8b
Organization
32Kx8
Density
256Kb
Interface Type
Parallel
Access Time (max)
35ns
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
80mA
Lead Free Status / RoHS Status
Not Compliant
Cypress Semiconductor Corporation
Document Number: 001-50593 Rev. *A
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 December 11, 2009
STK15C88
408-943-2600
technology
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Related parts for STK15C88N35I

STK15C88N35I Summary of contents

Page 1

... SOIC packages ■ RoHS Compliance Logic Block Diagram Cypress Semiconductor Corporation Document Number: 001-50593 Rev. *A 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’ ...

Page 2

Contents Features ...............................................................................1 Functional Description .......................................................1 Logic Block Diagram ..........................................................1 Contents ..............................................................................2 Pin Configurations .............................................................3 Device Operation ................................................................4 SRAM Read .........................................................................4 SRAM Write .........................................................................4 AutoStore Operation ..........................................................4 Hardware RECALL (Power Up) ..........................................4 Software STORE .................................................................4 Software RECALL ...............................................................4 Hardware Protect ...

Page 3

Pin Configurations Table 1. Pin Definitions - 28-Pin SOIC Pin Name Alt I/O Type A –A Input Address Inputs. Used to select one of the 32,768 bytes of the nvSRAM -DQ Input or Bidirectional Data I/O lines. ...

Page 4

Device Operation The STK15C88 is a versatile memory chip that provides several modes of operation. The STK15C88 can operate as a standard 32K x 8 SRAM. It has a 32K x 8 nonvolatile element shadow to which the SRAM information ...

Page 5

Hardware Protect The STK15C88 offers hardware protection against inadvertent STORE operation and SRAM WRITEs during low voltage condi- tions. When V <V , all externally initiated STORE CAP SWITCH operations and SRAM WRITEs are inhibited. Noise Considerations The STK15C88 is ...

Page 6

Table 2. Software STORE/RECALL Mode Selection 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. ...

Page 7

Maximum Ratings Exceeding maximum ratings may shorten the useful life of the device. These user guidelines are not tested. Storage Temperature ................................. –65°C to +150°C Temperature under bias.............................. –55°C to +125°C Supply Voltage on V Relative to GND ..........–0.5V to ...

Page 8

Data Retention and Endurance Parameter DATA Data Retention R NV Nonvolatile STORE Operations C Capacitance In the following table, the capacitance parameters are listed. Parameter Description C Input Capacitance IN C Output Capacitance OUT Thermal Resistance In the following table, ...

Page 9

AC Switching Characteristics SRAM Read Cycle Parameter Cypress Alt Parameter t t Chip Enable Access Time ACE ELQV [ Read Cycle Time RC AVAV, ELEH [ Address Access Time AA AVQV t t Output Enable ...

Page 10

Table 3. SRAM Write Cycle Parameter Cypress Alt Parameter AVAV PWE WLWH, WLEH SCE ELWH, ELEH DVWH, DVEH WHDX, EHDX ...

Page 11

AutoStore or Power Up RECALL Parameter Alt [10 Power up RECALL Duration HRECALL RESTORE [ STORE Cycle Duration STORE HLHZ V Low Voltage Reset Level RESET V Low Voltage Trigger Level SWITCH Switching Waveforms Note 10. ...

Page 12

Software Controlled STORE/RECALL Cycle The software controlled STORE/RECALL cycle follows. Parameter Alt t t STORE/RECALL Initiation Cycle Time RC AVAV [11 Address Setup Time SA AVEL [11 Clock Pulse Width CW ELEH [7, 11 ...

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-NF25TR STK15C88-NF25 STK15C88-SF25TR STK15C88-SF25 STK15C88-NF25ITR ...

Page 14

Package Diagrams 14 1 0.291[7.39] 0.300[7.62 0.697[17.70] 0.713[18.11] 0.013[0.33] 0.004[0.10] 0.050[1.27] 0.019[0.48] 0.0118[0.30] TYP. Document Number: 001-50593 Rev. *A Figure 11. 28-Pin (300 mil) SOIC (51-85026) NOTE : PIN JEDEC STD REF MO-119 2. BODY ...

Page 15

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

Page 16

... Cypress against all charges. Any Source Code (software and/or firmware) is owned by Cypress Semiconductor Corporation (Cypress) and is protected by and subject to worldwide patent protection (United States and foreign), United States copyright laws and international treaty provisions. Cypress hereby grants to licensee a personal, non-exclusive, non-transferable license to copy, use, modify, create derivative works of, and compile the Cypress Source Code and derivative works for the sole purpose of creating custom software and or firmware in support of licensee product to be used only in conjunction with a Cypress integrated circuit as specified in the applicable agreement ...

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