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Infineon Technologies STK14CA8-RF45ITR
- Part No.:
- STK14CA8-RF45ITR
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 48-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
STK14CA8-RF45ITR.pdf
- Description:
- IC NVSRAM 1MBIT PARALLEL 48SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,801
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Product details
Overview
STK14CA8-RF45ITR from Cypress Semiconductor is a 1 Mb (128K × 8) nonvolatile static RAM with integrated QuantumTrap storage, operating at 3.0V ±10%, offering 45 ns read/write cycle time, automatic STORE on power loss, and automatic RECALL on power-up. It delivers unlimited SRAM read/write endurance, 20-year data retention at 55°C, and supports industrial temperature range (–40°C to +85°C). Used in industrial PLCs for real-time parameter backup during brownouts.
For engineers reviewing the STK14CA8-RF45ITR datasheet, STK14CA8-RF45ITR pinout, STK14CA8-RF45ITR application, or STK14CA8-RF45ITR equivalent, key selection criteria include AutoStore timing (12.5 ms), VCAP capacitor requirement (17–120 µF), HSB hardware store busy signaling, and SSOP-48 package compatibility with legacy board layouts.
Technical Context
The STK14CA8-RF45ITR integrates a 1024×1024 SRAM array with per-cell QuantumTrap nonvolatile storage, enabling atomic STORE/RECALL operations without external controllers. Its dual-cycle architecture separates volatile SRAM access (E/G/W-controlled) from nonvolatile management (HSB-triggered or power-loss-initiated).
AutoStore activates when VCC drops below 2.65 V (VSWITCH), using charge stored on the external VCAP capacitor to complete a 12.5 ms STORE cycle. RECALL occurs automatically at power-up once VCC exceeds VSWITCH, restoring full 128K×8 contents within 20 ms - independent of software initialization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1 Mb (128K × 8 bits); provides byte-wide interface compatible with 8-bit microcontrollers and legacy bus architectures. |
| Access Time / Cycle Time | 45 ns; enables direct replacement of standard fast SRAM in systems with ≤22 MHz bus timing budgets. |
| VCC Operating Range | 2.7 V to 3.6 V; single-supply operation eliminates need for auxiliary voltage rails in 3.3V systems. |
| Nonvolatile STORE Cycles | 200,000 cycles; defines maximum guaranteed STORE operations before wear-out, critical for high-frequency logging applications. |
| Data Retention | 20 years at 55°C; ensures long-term parameter preservation in unpowered industrial equipment stored in warm environments. |
| VCAP Capacitance | 17–120 µF (5V rated); external tantalum or polymer capacitor required on VCAP pin to sustain STORE energy during power failure. |
| Operating Temperature | –40°C to +85°C; qualified for industrial control cabinets, motor drives, and outdoor metering enclosures. |
Pinout & Package
STK14CA8-RF45ITR is packaged in a 48-pin SSOP (RF suffix), 0.300-inch body width, RoHS-compliant, with 0.025-inch pitch. Pin 1 is marked by a dot or beveled corner; VCAP requires local decoupling to VSS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A16–A0 | Input | 17-bit address bus; selects one of 131,072 bytes; A16 enables full 1 Mb addressing without banking logic. |
| DQ7–DQ0 | I/O | Bi-directional 8-bit data bus; TTL/CMOS-compatible; tri-stated when G is high or E is high. |
| E | Input | Active-low chip enable; must be low to activate memory access; controls SRAM read/write initiation. |
| W | Input | Active-low write enable; latches data on DQ pins at falling edge of E during write cycles. |
| G | Input | Active-low output enable; enables DQ drivers during reads; high state forces DQ to high-impedance. |
| HSB | I/O | Hardware Store Busy; open-drain output pulled high internally; goes low during STORE/RECALL; can initiate STORE when externally pulled low. |
| VCAP | Power | AutoStore capacitor connection; supplies energy for nonvolatile STORE during VCC collapse; requires 17–120 µF, 5V-rated capacitor to VSS. |
| VCC | Power | 3.0V supply input (+20%, –10%); powers both SRAM core and QuantumTrap storage circuitry. |
| VSS | Power | Ground reference for all logic and analog functions; must be low-inductance connection to minimize STORE timing jitter. |
Key Features
| Feature | Design Value |
|---|---|
| Automatic STORE on Power Loss | Detects VCC drop below 2.65 V and autonomously initiates nonvolatile save without firmware intervention or external supervision. |
| Software-Controlled STORE/RECALL | Executed via command sequences on address/data bus; enables deterministic save points (e.g., after configuration update) without relying on power events. |
| Unlimited SRAM Read/Write Endurance | No wear-out mechanism in volatile SRAM portion; supports continuous logging, buffering, or scratchpad use over product lifetime. |
| 20-Year Data Retention at 55°C | Validated retention life under accelerated thermal stress; eliminates need for battery-backed RAM maintenance in field-deployed systems. |
| HSB Pin for Hardware Store Trigger | Allows external controller (e.g., MCU GPIO) to force immediate STORE via pull-down; synchronizes save with system-level shutdown sequences. |
Applications
| Industrial PLC Parameter Backup | Smart Meter Firmware State Save |
|---|---|
|
Use Scenario: Preserves I/O configuration, calibration offsets, and runtime counters during unexpected AC mains dropout in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile memory buffer that bridges power gaps; stores critical state within 12.5 ms of VCC collapse. Use Value: Eliminates need for supercapacitor-based hold-up circuits and avoids firmware reinitialization delays upon recovery. |
Use Scenario: Captures tariff schedule changes, tamper-event flags, and accumulated kWh readings during grid disconnection in ANSI C12.22-compliant meters. IC Role / Device Role / Timing Role: Atomic STORE/RECALL engine ensuring no billing data loss across >100,000 power cycles. Use Value: Meets ANSI C12.19 data integrity requirements without battery replacement service intervals. |
| Railway Signaling System Configuration | Medical Infusion Pump Calibration Storage |
|
Use Scenario: Maintains switch position maps and interlocking logic tables during diesel-generator switchover in trackside signal boxes. IC Role / Device Role / Timing Role: Fail-safe nonvolatile register bank; guarantees configuration persistence across 20-year deployment life. Use Value: Complies with EN 50126/50128 SIL-2 requirements for safety-related memory integrity. |
Use Scenario: Secures drug delivery rate profiles, occlusion pressure thresholds, and user audit logs during battery swap in Class II infusion devices. IC Role / Device Role / Timing Role: Tamper-resistant, nonvolatile parameter vault with 20-year retention at 40°C ambient. Use Value: Supports FDA 21 CFR Part 11 electronic record integrity without volatile RAM + battery subsystems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar nonvolatile SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STK14C88-RF45ITR | Same 1 Mb density and 45 ns speed, but uses newer Cypress nvSRAM generation with lower ICC2 (2.5 mA vs. 3 mA) and extended VCAP range (10–220 µF). | Supports wider capacitor tolerance and reduced standby current; suitable for new designs targeting lower power and higher reliability. | Select when designing new industrial systems requiring longer lifecycle support and improved power efficiency. |
| FM1808-40-SG | 4 Mb (512K × 8), 40 ns access, 3.3V-only, uses F-RAM technology; unlimited endurance, 10-year retention, no VCAP capacitor required. | Eliminates external capacitor and supports higher density; lacks AutoStore trigger on power loss - requires MCU-driven save on brownout detection. | Choose where board space is constrained and deterministic software-controlled save is acceptable. |
Compared with STK14CA8-RF45ITR, STK14C88-RF45ITR offers enhanced power efficiency and broader capacitor compatibility, while FM1808-40-SG trades automatic power-loss response for higher density and zero external passive components - making it better suited for compact, MCU-managed systems.
Availability
STK14CA8-RF45ITR is available at Aetrix Electronics and suitable for industrial PLCs, smart electricity meters, railway signaling systems, and medical infusion pumps requiring stable component supply and long-term obsolescence management.
Supply support for STK14CA8-RF45ITR 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 fabless semiconductor company specializing in memory, microcontrollers, and connectivity solutions for industrial, automotive, and consumer applications.
The STK14CA8 belongs to Cypress's nvSRAM product line, designed specifically to replace battery-backed SRAM in mission-critical systems where maintenance-free, long-life nonvolatile storage is mandatory.
FAQ
What is the purpose of the VCAP pin, and what capacitor value must be used?
The VCAP pin supplies energy to complete the nonvolatile STORE operation during power loss. A 17–120 µF, 5V-rated tantalum or polymer capacitor must be placed between VCAP and VSS. Values outside this range risk incomplete STORE cycles or excessive inrush current. The capacitor must be low-ESR (<1 Ω) and mounted within 5 mm of the VCAP pin.
Can STK14CA8-RF45ITR be used without connecting the HSB pin?
Yes - HSB is optional. When left unconnected, its internal weak pull-up holds it high, disabling hardware-initiated STORE. AutoStore still functions on power loss, and software STORE/RECALL remains fully operational. Leaving HSB unconnected simplifies layout but removes the ability to trigger STORE synchronously with MCU-controlled shutdown sequences.
How does AutoStore differ from software-controlled STORE?
AutoStore triggers automatically when VCC falls below 2.65 V, using residual VCAP charge - no firmware involvement needed. Software STORE requires executing a specific address/data command sequence while VCC is stable, enabling controlled saves (e.g., after configuration updates). Both use identical QuantumTrap storage and guarantee atomicity, but AutoStore is fail-safe; software STORE is deterministic.
Is STK14CA8-RF45ITR recommended for new designs?
No - Cypress explicitly marks STK14CA8 as "Not Recommended for New Designs" (NRND) in its datasheet (Rev. *A, Dec 2009). It remains available for legacy support and obsolescence management, but new designs should consider STK14C88-RF45ITR or Infineon's updated nvSRAM portfolio for extended longevity, improved specs, and active technical support.
STK14CA8-RF45ITR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 48-BSSOP (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:
- 45ns
- Access Time:
- 45 ns
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-SSOP
STK14CA8-RF45ITR FAQ
1.How can I place an order for STK14CA8-RF45ITR through Aetrix?
Please submit a Request for Quotation (RFQ) for STK14CA8-RF45ITR 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-RF45ITR reliable?
The price and inventory of STK14CA8-RF45ITR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STK14CA8-RF45ITR is usually 5 days.
3.What payment methods are accepted for STK14CA8-RF45ITR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STK14CA8-RF45ITR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STK14CA8-RF45ITR?
STK14CA8-RF45ITR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STK14CA8-RF45ITR 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-RF45ITR?
For technical support, including STK14CA8-RF45ITR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STK14CA8-RF45ITR requirements.
6.How does Aetrix verify that STK14CA8-RF45ITR is sourced from the original manufacturer or authorized distributors?
All STK14CA8-RF45ITR 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-RF45ITR meets industry standards.
7.What is the process for return or replacement of STK14CA8-RF45ITR?
All STK14CA8-RF45ITR units undergo pre-shipment inspection (PSI). If there is an issue with STK14CA8-RF45ITR, 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-RF45ITR part is unused and in its original packaging.
Return procedure for STK14CA8-RF45ITR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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