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Infineon Technologies STK14CA8-NF25TR
- Part No.:
- STK14CA8-NF25TR
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 32-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
STK14CA8-NF25TR.pdf
- Description:
- IC NVSRAM 1MBIT PARALLEL 32SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,319
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Product details
Overview
STK14CA8-NF25TR from Cypress Semiconductor is a 128K × 8 (1 Mb) nonvolatile static RAM with integrated QuantumTrap storage, operating at 3.0V ±10%, offering 25 ns read access time, unlimited SRAM read/write endurance, and automatic STORE/RECALL on power loss/power-up. It delivers deterministic nonvolatile data retention for industrial control logging and metering applications requiring guaranteed data integrity across power cycles.
For engineers reviewing the STK14CA8-NF25TR datasheet, STK14CA8-NF25TR pinout, STK14CA8-NF25TR application, or STK14CA8-NF25TR equivalent, key selection criteria include AutoStore timing (12.5 ms), VCAP capacitor requirement (17–120 μF), HSB hardware store-busy signaling, and compatibility with standard SRAM interface protocols in legacy industrial systems.
Technical Context
The STK14CA8-NF25TR integrates a monolithic 1024 × 1024 SRAM array with per-cell QuantumTrap nonvolatile storage, enabling atomic STORE (SRAM→nonvolatile) and RECALL (nonvolatile→SRAM) operations. Its dual-control architecture supports both hardware-triggered STORE via HSB pin assertion and software-controlled STORE/RECALL using command sequences.
It operates within a single 2.7–3.6 V supply, with dedicated VCAP pin requiring external 17–120 μF tantalum or polymer capacitor to sustain STORE during VCC dropout. The device implements full SRAM timing compliance (E/G/W control), while disabling all SRAM access during active STORE/RECALL (tSTORE = 12.5 ms, tHRECALL = 20 ms).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 128K × 8 (1 Mb) - supports byte-wide parallel bus interfaces without address multiplexing |
| Read Access Time | 25 ns - enables direct replacement of fast SRAMs in legacy 25 ns timing windows |
| Nonvolatile STORE Duration | 12.5 ms - defines minimum VCAP hold-up time requirement during brownout |
| Data Retention | 20 years at 55°C - guarantees long-term archival without refresh or backup power |
| VCC Operating Range | 2.7 V to 3.6 V - compatible with 3.3 V systems including ±10% tolerance margins |
| VCAP Capacitance | 17–120 μF - specifies minimum/maximum external capacitor value for reliable STORE |
| Endurance | 200,000 STORE cycles - sets lifetime limit for frequent nonvolatile write events |
Pinout & Package
STK14CA8-NF25TR is packaged in a 32-pin SOIC (Small Outline Integrated Circuit) with 0.3 inch body width, RoHS-compliant, and pin-compatible with industry-standard 32-pin SRAM footprints.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A16–A0 | Input | 17-bit address bus selecting one of 131,072 bytes; A16 enables full 1 Mb decoding |
| DQ7–DQ0 | I/O | Bi-directional 8-bit data bus; tri-stated when G high or E high |
| E | Input | Active-low chip enable; latches address on falling edge and controls SRAM access window |
| W | Input | Active-low write enable; initiates SRAM write on falling edge of E with W low |
| G | Input | Active-low output enable; controls DQ driver state independent of E |
| HSB | I/O | Open-drain hardware store-busy indicator; pulled low externally to trigger STORE |
| VCAP | Power | Connection point for external storage capacitor; supplies energy for STORE operation |
| VCC | Power | 3.0 V core supply; must remain ≥2.65 V for AutoStore activation (VSWITCH threshold) |
| VSS | Power | Ground reference for all logic and memory circuits |
Key Features
| Feature | Design Value |
|---|---|
| AutoStore on Power Loss | Automatic SRAM-to-nonvolatile transfer triggered by VCC falling below 2.65 V, eliminating external supervision circuitry |
| Software-Controlled STORE/RECALL | Executed via defined command sequences on standard SRAM bus-no additional control lines required |
| Unlimited SRAM Read/Write Endurance | Enables continuous logging or buffer cycling without wear-out concerns typical of flash or EEPROM |
| Hardware STORE Initiation | HSB pin allows external microcontroller or supervisor IC to force STORE synchronously with system shutdown |
| 20-Year Data Retention at 55°C | Validated retention life supports long-deployment industrial equipment without periodic data refresh |
Applications
| Smart Electricity Metering | Programmable Logic Controller (PLC) I/O Logging |
|---|---|
|
Use Scenario: Storing cumulative kWh readings and event timestamps during grid outages. IC Role / Device Role / Timing Role: Nonvolatile SRAM buffer holding critical metering registers between power cycles. Use Value: Guarantees zero data loss during brownouts without battery or supercapacitor backup circuitry. |
Use Scenario: Capturing real-time sensor inputs and actuator states before controlled PLC shutdown. IC Role / Device Role / Timing Role: Atomic STORE/RECALL ensures deterministic state recovery after unexpected power loss. Use Value: Eliminates need for external NVRAM controllers or complex firmware checkpointing logic. |
| Industrial HMI Configuration Storage | Medical Diagnostic Equipment Calibration Data |
|
Use Scenario: Preserving user-defined display layouts, language settings, and alarm thresholds across reboots. IC Role / Device Role / Timing Role: Byte-addressable nonvolatile memory accessed as standard SRAM, simplifying host CPU interface. Use Value: Enables instant configuration reload on power-up without boot-time EEPROM polling delays. |
Use Scenario: Securing factory calibration coefficients and sensor offset values used in diagnostic signal processing. IC Role / Device Role / Timing Role: High-reliability nonvolatile storage with 20-year retention, meeting medical device traceability requirements. Use Value: Avoids recalibration service visits by preserving precision data through equipment lifecycle. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar nonvolatile SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STK14CA8-RF45I | 45 ns access time; SSOP-48 package; higher thermal resistance (θja = 41.8°C/W at 500 fpm) | Suitable for space-constrained PCBs where SOIC footprint is unavailable; slower timing limits use in high-speed buffers | Select when board layout requires 48-pin SSOP and 45 ns timing suffices for system bus speed |
| AS1C1M816P-25TIN | 25 ns access; 3.3 V only (no -10% tolerance); no AutoStore-requires external controller for NV backup | Requires external power-fail detection and STORE sequencing logic; lacks integrated VCAP management | Choose only if existing design already implements external STORE control and tighter VCC regulation is guaranteed |
Compared with STK14CA8-RF45I and AS1C1M816P-25TIN, the STK14CA8-NF25TR uniquely combines 25 ns speed, SOIC-32 footprint, and fully autonomous AutoStore-reducing BOM count and firmware complexity in cost-sensitive industrial designs.
Availability
STK14CA8-NF25TR is available at Aetrix Electronics and suitable for smart metering, PLC data logging, industrial HMI configuration storage, and medical calibration data retention requiring stable component supply and long-lifecycle support.
Supply support for STK14CA8-NF25TR 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) designs high-reliability memory and programmable solutions for industrial, automotive, and communications infrastructure markets.
The STK14CA8 product line delivers monolithic nvSRAMs optimized for deterministic, battery-free nonvolatile data capture in mission-critical embedded systems where power interruption is common.
FAQ
What is the function of the VCAP pin, and what capacitor value is required?
The VCAP pin connects to an external capacitor that supplies energy during power loss to complete the nonvolatile STORE operation. A minimum 17 μF and maximum 120 μF tantalum or polymer capacitor rated for 5 V must be placed between VCAP and VSS. Values outside this range risk incomplete STORE or excessive inrush current.
Can STK14CA8-NF25TR be used as a drop-in replacement for standard SRAMs?
Yes-its pinout, timing, and control signals (E, G, W, A[16:0], DQ[7:0]) match standard 32-pin SOIC SRAMs. However, the VCAP connection and HSB pin must be accounted for: VCAP requires external capacitor, and HSB should be left unconnected or pulled high unless hardware STORE is needed.
How does AutoStore differ from software-controlled STORE?
AutoStore triggers automatically when VCC drops below 2.65 V; no host intervention is required. Software STORE uses specific address/data command sequences on the SRAM bus and executes only when VCC is stable. Both use identical internal STORE circuitry and duration (12.5 ms), but AutoStore ensures fail-safe operation during uncontrolled power loss.
Is STK14CA8-NF25TR recommended for new designs?
No-Cypress has marked STK14CA8 as "Not Recommended for New Designs" (NRND) per its official documentation. It remains supported for existing production and legacy system maintenance, but designers should evaluate Infineon's newer nvSRAM families (e.g., CY14B108N) for new projects requiring extended longevity and enhanced features.
STK14CA8-NF25TR 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:
- 1Mbit
- Memory Organization:
- 128K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 25ns
- Access Time:
- 25 ns
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-SOIC
STK14CA8-NF25TR FAQ
1.How can I place an order for STK14CA8-NF25TR through Aetrix?
Please submit a Request for Quotation (RFQ) for STK14CA8-NF25TR 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 STK14CA8-NF25TR reliable?
The price and inventory of STK14CA8-NF25TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STK14CA8-NF25TR is usually 5 days.
3.What payment methods are accepted for STK14CA8-NF25TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STK14CA8-NF25TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STK14CA8-NF25TR?
STK14CA8-NF25TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STK14CA8-NF25TR 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 STK14CA8-NF25TR?
For technical support, including STK14CA8-NF25TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STK14CA8-NF25TR requirements.
6.How does Aetrix verify that STK14CA8-NF25TR is sourced from the original manufacturer or authorized distributors?
All STK14CA8-NF25TR 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 STK14CA8-NF25TR meets industry standards.
7.What is the process for return or replacement of STK14CA8-NF25TR?
All STK14CA8-NF25TR units undergo pre-shipment inspection (PSI). If there is an issue with STK14CA8-NF25TR, 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 STK14CA8-NF25TR part is unused and in its original packaging.
Return procedure for STK14CA8-NF25TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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