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Infineon Technologies STK14C88-NF25ITR
- Part No.:
- STK14C88-NF25ITR
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 32-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
STK14C88-NF25ITR.pdf
- Description:
- IC NVSRAM 256KBIT PAR 32SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,472
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Product details
Overview
STK14C88-NF25ITR from Cypress Semiconductor is a 32K × 8 (256 Kb) nonvolatile static RAM with AutoStore functionality, operating at 5 V ±10%, featuring 25 ns read access time, unlimited SRAM read/write endurance, and automatic nonvolatile STORE on power loss. It integrates Quantum Trap nonvolatile storage per cell and supports hardware/software-controlled STORE/RECALL operations for industrial data logging systems.
For engineers reviewing the STK14C88-NF25ITR datasheet, STK14C88-NF25ITR pinout, STK14C88-NF25ITR application, or STK14C88-NF25ITR equivalent, key selection criteria include AutoStore timing (10 ms STORE cycle), VCAP capacitor interface, HSB busy signaling, and compatibility with legacy 5 V SRAM bus protocols in mission-critical power-fail-safe memory designs.
Technical Context
The STK14C88-NF25ITR implements monolithic nvSRAM architecture with dual-mode operation: standard fast SRAM mode (25 ns access) and nonvolatile STORE/RECALL mode triggered by power loss detection or HSB assertion. Its Quantum Trap storage element enables 100-year data retention without external battery backup.
STORE is initiated either automatically during VCC drop below threshold or manually via HSB low pulse (≥15 ns), while RECALL occurs automatically at power-up or under software control. The device uses dedicated VCAP pin to sustain STORE operation using an external capacitor, eliminating need for auxiliary power sources.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 32K × 8 = 256 Kb SRAM with integrated nonvolatile storage per cell |
| Access Time | 25 ns - enables direct replacement of standard 25 ns SRAMs in existing 5 V systems |
| Nonvolatile STORE Time | 10 ms - defines minimum VCAP hold-up time requirement for reliable data save |
| Data Retention | 100 years - ensures long-term archival integrity without refresh or power |
| Endurance | 1 million STORE cycles, unlimited RECALL and SRAM read/write cycles |
| Supply Voltage | 5.0 V ±10% - compatible with legacy 5 V logic rails and industrial power supplies |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded applications |
Pinout & Package
STK14C88-NF25ITR is packaged in a 32-pin 300-mil SOIC (RoHS-compliant), pin-compatible with industry-standard 32-pin SRAM footprints.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Input Address Bus | 15-bit address lines selecting one of 32,768 bytes; supports full memory addressing |
| DQ0–DQ7 | I/O Data Bus | 8-bit bidirectional data path; tristates when G or E inactive |
| E | Input Chip Enable | Active-low chip select; controls device activation and write latching |
| W | Input Write Enable | Active-low write strobe; samples data on falling edge of E |
| G | Input Output Enable | Active-low output enable; disables DQ drivers when high |
| HSB | I/O Hardware Store Busy | Open-drain status output (low during STORE); also accepts STORE trigger input |
| VCAP | Power Supply Input | Connects external capacitor to sustain STORE operation during VCC collapse |
| VCC | Power Supply | 5 V ±10% main supply; powers SRAM array and control logic |
| VSS | Ground | Reference ground for all I/O and internal circuitry |
| NC | No Connect | Pins 2 and 29 are unconnected; must remain floating or grounded per layout rules |
Key Features
| Feature | Design Value |
|---|---|
| AutoStore on Power Loss | Automatic, capacitor-backed nonvolatile STORE triggered by VCC drop-no firmware or external supervision required |
| Hardware STORE Trigger | HSB pin serves dual role: status indicator and active-low STORE initiation signal for deterministic fail-safe control |
| Software-Controlled STORE/RECALL | Full STORE and RECALL execution via standard SRAM write sequences-no special protocol or command codes needed |
| Unlimited SRAM Endurance | True infinite read/write cycles to volatile array-eliminates wear-leveling overhead in high-frequency logging |
| 100-Year Data Retention | Quantum Trap storage retains data without power, temperature cycling, or refresh-ideal for archival and regulatory compliance |
Applications
| Industrial Data Logger | Medical Device Memory Backup |
|---|---|
Use Scenario: Continuous acquisition of sensor readings in programmable logic controllers with periodic power interruption risk. IC Role / Device Role / Timing Role: Nonvolatile memory buffer that captures last valid state before brownout and restores it on reboot. Use Value: Eliminates need for external battery or supercapacitor backup circuits while guaranteeing deterministic STORE within 10 ms. | Use Scenario: Storing critical patient configuration and calibration parameters in portable diagnostic equipment. IC Role / Device Role / Timing Role: Fail-safe parameter store ensuring FDA-required data persistence across unplanned shutdowns. Use Value: Meets IEC 62304 Class C software safety requirements via guaranteed 100-year retention and zero data corruption on power loss. |
| Avionics Black Box Recorder | Smart Grid Metering Module |
Use Scenario: Recording flight telemetry in aircraft systems where power may be lost during emergency landing. IC Role / Device Role / Timing Role: Primary nonvolatile buffer capturing real-time operational data prior to crash-induced power failure. Use Value: Provides deterministic STORE latency (10 ms) and immunity to vibration/temperature extremes per DO-160 Section 22. | Use Scenario: Maintaining tariff tables, billing counters, and event logs in utility meters exposed to grid instability. IC Role / Device Role / Timing Role: Tamper-resistant, long-life memory for revenue-critical data with no maintenance or battery replacement. Use Value: Achieves ANSI C12.1 compliance for 20+ year field life using single-chip solution with no moving parts or consumables. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar nonvolatile SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STK14CA8-NF25I | Same pinout and function but uses newer process; supports extended temperature range (–55°C to +125°C) | Required for military/aerospace deployments beyond industrial grade | Select when operating outside –40°C to +85°C or requiring MIL-STD-883 qualification |
| FM24CL16B | 16 Kb F-RAM with 3.3 V supply, 55 ns access, no STORE timing dependency on VCAP | Lower power, faster writes, but smaller density and incompatible voltage/interface | Choose for ultra-low-power, high-write-cycle applications where 256 Kb and 5 V are not mandatory |
Compared with STK14C88-NF25ITR, STK14CA8-NF25I offers broader temperature tolerance and enhanced reliability for harsh environments, while FM24CL16B trades density and voltage compatibility for lower energy per write and elimination of external capacitor design complexity.
Availability
STK14C88-NF25ITR is available at Aetrix Electronics and suitable for industrial data loggers, medical device memory backup, and avionics black box recorders requiring stable component supply and long-term obsolescence management.
Supply support for STK14C88-NF25ITR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Cypress Semiconductor (now part of Infineon Technologies) is a U.S.-based semiconductor company specializing in memory, microcontrollers, and connectivity solutions for industrial, automotive, and consumer markets.
The STK14C88 belongs to Cypress's nvSRAM product line, engineered to replace battery-backed SRAM in applications demanding zero-maintenance, high-reliability nonvolatile storage with standard parallel interface timing.
FAQ
What is the purpose of the VCAP pin?
The VCAP pin connects an external capacitor that provides temporary power during VCC collapse, enabling the 10 ms AutoStore operation to complete reliably. Typical values range from 4.7 µF to 47 µF, rated ≥10 V, with low ESR. Placement must minimize trace inductance to ensure stable voltage during STORE.
How does hardware STORE differ from software STORE?
Hardware STORE is initiated by pulling HSB low for ≥15 ns, triggering immediate nonvolatile save independent of CPU activity. Software STORE uses a specific SRAM write sequence to the same address space, allowing controlled, synchronized saves during known safe states-both use identical 10 ms STORE duration and VCAP discharge profile.
Is STK14C88-NF25ITR still recommended for new designs?
No-Cypress documentation explicitly marks STK14C88 as "Not Recommended for New Designs." It remains supported for legacy system repair and continuity, but Infineon recommends STK14CA8 or newer nvSRAM families for new projects due to improved process, extended temperature range, and longer projected lifecycle.
Can STK14C88-NF25ITR operate with 3.3 V logic levels?
No-STK14C88-NF25ITR requires 5.0 V ±10% on VCC and is TTL/CMOS-compatible only at 5 V. Its inputs accept VIH ≥ 2.2 V and VIL ≤ 0.8 V, but output drive strength and timing specifications are validated exclusively at 5 V. Interfacing with 3.3 V systems requires level translation.
STK14C88-NF25ITR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 32-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- NVSRAM
- Technology:
- NVSRAM (Non-Volatile SRAM)
- Memory Size:
- 256Kbit
- Memory Organization:
- 32K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 25ns
- Access Time:
- 25 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-SOIC
STK14C88-NF25ITR FAQ
1.How can I place an order for STK14C88-NF25ITR through Aetrix?
Please submit a Request for Quotation (RFQ) for STK14C88-NF25ITR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for STK14C88-NF25ITR reliable?
The price and inventory of STK14C88-NF25ITR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STK14C88-NF25ITR is usually 5 days.
3.What payment methods are accepted for STK14C88-NF25ITR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STK14C88-NF25ITR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STK14C88-NF25ITR?
STK14C88-NF25ITR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STK14C88-NF25ITR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for STK14C88-NF25ITR?
For technical support, including STK14C88-NF25ITR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STK14C88-NF25ITR requirements.
6.How does Aetrix verify that STK14C88-NF25ITR is sourced from the original manufacturer or authorized distributors?
All STK14C88-NF25ITR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that STK14C88-NF25ITR meets industry standards.
7.What is the process for return or replacement of STK14C88-NF25ITR?
All STK14C88-NF25ITR units undergo pre-shipment inspection (PSI). If there is an issue with STK14C88-NF25ITR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The STK14C88-NF25ITR part is unused and in its original packaging.
Return procedure for STK14C88-NF25ITR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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