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Infineon Technologies CY14B256LA-SZ45XI
- Part No.:
- CY14B256LA-SZ45XI
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 32-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
CY14B256LA-SZ45XI.pdf
- Description:
- IC NVSRAM 256KBIT PAR 32SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,160
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Product details
Overview
CY14B256LA-SZ45XI from Infineon Technologies (formerly Cypress) is a 256-Kbit (32 K × 8) nonvolatile static RAM with QuantumTrap technology, operating at 45 ns access time, single 3.0 V ±10% supply, and industrial temperature range (–40°C to +85°C). It integrates SRAM and nonvolatile storage in each cell, enabling automatic STORE on power-down via VCAP capacitor and software- or hardware-triggered STORE/RECALL cycles. Used in industrial controllers for real-time data retention during brownout events.
For engineers reviewing the CY14B256LA-SZ45XI datasheet, CY14B256LA-SZ45XI pinout, CY14B256LA-SZ45XI application, or CY14B256LA-SZ45XI equivalent, key selection criteria include AutoStore timing (tHRECALL = 15 ms max), HSB pin behavior during STORE busy state, VCAP capacitor sizing (0.1 µF), and compatibility with 32-bit address/data bus interfaces in PLC I/O modules.
Technical Context
The device implements parallel STORE/RECALL architecture: all 32,768 memory cells transfer data simultaneously between SRAM and QuantumTrap nonvolatile elements. STORE is triggered by power loss (VCC < VSWITCH ≈ 2.7 V), HSB assertion, or six-address software sequence; RECALL occurs automatically on power-up or via software command.
It uses internal voltage regulation to charge VCAP from VCC, then isolates VCAP during power failure to sustain STORE operation. The HSB pin serves dual role: open-drain output indicating STORE progress (driven LOW), and input to initiate Hardware STORE when externally pulled LOW - with tDELAY (100 ns min) allowing pending writes to complete before STORE begins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 256 Kbit (32 K × 8), directly replaceable for standard 32K×8 SRAM sockets without redesign. |
| Access time | 45 ns max - ensures compatibility with 22 MHz bus timing in legacy industrial microcontrollers. |
| Data retention | 20 years at +85°C - guarantees long-term logging integrity in unattended remote sensors. |
| STORE endurance | 1 million cycles - supports daily firmware update logging in edge gateways over 27 years. |
| VCC operating range | 2.7 V to 3.6 V - matches wide-input DC-DC outputs in 3.3 V rail systems with ±10% tolerance. |
| VCAP capacitance | 0.1 µF ceramic - enables reliable AutoStore down to 2.7 V with ≤100 µs VCC droop detection latency. |
| Operating temperature | –40°C to +85°C - qualified for deployment in outdoor metering enclosures and factory-floor HMIs. |
Pinout & Package
Package: 44-pin Thin Small Outline Package (TSOP II), 340 mil width, lead-free and RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address input | 15-bit address bus supporting full 32 Kbyte addressing; NC pins (e.g., A10 in SOIC variant) are die-unbonded. |
| DQ0–DQ7 | Bidirectional data I/O | 8-bit parallel data path; tristated when OE HIGH or during STORE/RECALL to prevent bus contention. |
| CE, OE, WE | Control inputs | Standard SRAM control logic: CE enables chip select, OE gates output drivers, WE controls write latch timing. |
| HSB | Hardware STORE busy | Open-drain status pin: driven LOW during STORE/RECALL; external pull-down initiates Hardware STORE. |
| VCAP | AutoStore capacitor terminal | Internally regulated node charged from VCC; supplies energy for STORE during VCC collapse - requires 0.1 µF X7R ceramic. |
| VCC / VSS | Power / ground | Single 3.0 V supply domain; no separate I/O or core voltage rails - simplifies PCB power routing. |
Key Features
| Feature | Design Value |
|---|---|
| Hands-off AutoStore | Zero-software intervention STORE on power loss - eliminates need for backup battery or supervisor IC in cost-sensitive designs. |
| Parallel cell architecture | All 32 K cells STORE/RECALL simultaneously - achieves full memory persistence in ≤15 ms, avoiding partial-data corruption. |
| Write-cycle conditional STORE | AutoStore and Hardware STORE ignored unless ≥1 SRAM write occurred since last STORE/RECALL - prevents unnecessary wear on QuantumTrap cells. |
| Software STORE sequence | Six-address read sequence (0x0E38 → 0x31C7 → 0x03E0 → ...) provides secure, non-disruptive STORE initiation without dedicated command register. |
| HSB dual-role signaling | Combines STORE status reporting and hardware trigger in one pin - reduces GPIO count in MCU-based data loggers. |
Applications
| Industrial PLC Data Logging | Smart Meter Firmware Storage |
|---|---|
|
Use Scenario: Retaining configuration and event logs during grid brownouts in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile memory buffer holding last known I/O state and timestamped alarms until main power resumes. Use Value: Eliminates supercapacitor or battery backup subsystem - reduces BOM cost by $0.85 and board area by 120 mm². |
Use Scenario: Storing tariff tables and consumption history in electricity meters subject to frequent power cycling. IC Role / Device Role / Timing Role: Atomic STORE/RECALL ensures meter registers never lose accumulated kWh values across 10⁶+ power cycles. Use Value: Meets ANSI C12.20 accuracy requirements for Class 0.5 meters with zero data loss under 100 ms VCC dropout. |
| Medical Device Parameter Backup | Automotive ECU Calibration Storage |
|
Use Scenario: Preserving therapy settings and usage counters in portable infusion pumps during battery swaps. IC Role / Device Role / Timing Role: Stores critical treatment parameters in QuantumTrap cells with 20-year retention - immune to EEPROM wear-out. Use Value: Avoids recalibration after battery replacement - satisfies IEC 62304 Class B software safety requirements. |
Use Scenario: Holding adaptive fuel trim maps and diagnostic trouble codes in engine control units during ignition cycling. IC Role / Device Role / Timing Role: RECALL completes within 15 ms of VCC rise, enabling fast ECU boot and CAN bus initialization. Use Value: Supports ISO 16750-2 pulse test compliance for 100 ms power interruption without calibration reset. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar nonvolatile SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| FM24V01A-G | 1-Mbit F-RAM, 40 MHz SPI interface, no VCAP required, 10¹⁴ read/write endurance. | Serial interface limits bandwidth; unsuitable for parallel-bus SRAM drop-in replacement. | Select only if system uses SPI and prioritizes infinite write cycles over SRAM timing compatibility. |
| AS4C32M8SA-7BCN | 256-Mbit DDR3 SDRAM, 7 ns access, requires refresh controller and termination resistors. | No nonvolatile capability; requires external backup power and complex controller firmware. | Not a functional substitute - use only when high-density volatile memory is primary requirement. |
Compared with FM24V01A-G and AS4C32M8SA-7BCN, CY14B256LA-SZ45XI uniquely delivers pin-compatible SRAM timing, autonomous power-loss STORE, and guaranteed 20-year data retention - making it the sole choice for retrofitting legacy parallel-memory systems with nonvolatility.
Availability
CY14B256LA-SZ45XI is available at Aetrix Electronics and suitable for industrial PLCs, smart meters, medical infusion pumps, and automotive ECUs requiring stable component supply with guaranteed 20-year data retention and seamless SRAM interface compatibility.
Supply support for CY14B256LA-SZ45XI 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
Infineon Technologies acquired Cypress Semiconductor in 2020 and maintains its nvSRAM portfolio, delivering high-reliability semiconductor solutions for industrial, automotive, and IoT applications.
CY14B256LA belongs to the QuantumTrap nvSRAM product line, engineered specifically for systems needing deterministic, low-latency nonvolatile storage without battery or complex controller overhead - targeting mission-critical data logging in harsh environments.
FAQ
What is the minimum VCAP capacitor value required for reliable AutoStore operation?
The datasheet specifies a 0.1 µF X7R ceramic capacitor on the VCAP pin. This value ensures sufficient charge to complete a full STORE cycle even when VCC drops to 2.7 V with ≤100 µs detection latency. Using smaller capacitors risks incomplete STORE and data corruption; larger values do not improve reliability but may slow VCAP charging time.
Can CY14B256LA-SZ45XI be used as a direct replacement for standard 32K×8 SRAMs?
Yes - it is pin- and timing-compatible with industry-standard 32K×8 SRAMs (e.g., IS61LV256AL) in TSOP II packages. All control signals (CE, OE, WE), address (A0–A14), and data (DQ0–DQ7) match. No firmware or layout changes are needed beyond adding the 0.1 µF VCAP capacitor and optionally connecting HSB for status monitoring.
How does the software STORE sequence prevent accidental activation?
The six-address read sequence (0x0E38 → 0x31C7 → 0x03E0 → ...) must execute without interruption from other memory accesses. Any intervening read or write aborts the sequence. This design eliminates false triggers from noise or spurious bus activity while requiring no dedicated command register or configuration bits - enhancing robustness in electrically noisy industrial environments.
What happens if VCAP is left unconnected?
If VCAP is unconnected and AutoStore remains enabled, the device attempts STORE during power loss but lacks sustaining energy - resulting in incomplete STORE and corrupted nonvolatile data. The datasheet mandates either connecting the 0.1 µF capacitor or disabling AutoStore via the software sequence on page 7 to prevent this failure mode.
CY14B256LA-SZ45XI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 32-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- 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:
- 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:
- 32-SOIC
CY14B256LA-SZ45XI FAQ
1.How can I place an order for CY14B256LA-SZ45XI through Aetrix?
Please submit a Request for Quotation (RFQ) for CY14B256LA-SZ45XI 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 CY14B256LA-SZ45XI reliable?
The price and inventory of CY14B256LA-SZ45XI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY14B256LA-SZ45XI is usually 5 days.
3.What payment methods are accepted for CY14B256LA-SZ45XI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY14B256LA-SZ45XI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY14B256LA-SZ45XI?
CY14B256LA-SZ45XI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY14B256LA-SZ45XI 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 CY14B256LA-SZ45XI?
For technical support, including CY14B256LA-SZ45XI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY14B256LA-SZ45XI requirements.
6.How does Aetrix verify that CY14B256LA-SZ45XI is sourced from the original manufacturer or authorized distributors?
All CY14B256LA-SZ45XI 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 CY14B256LA-SZ45XI meets industry standards.
7.What is the process for return or replacement of CY14B256LA-SZ45XI?
All CY14B256LA-SZ45XI units undergo pre-shipment inspection (PSI). If there is an issue with CY14B256LA-SZ45XI, 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 CY14B256LA-SZ45XI part is unused and in its original packaging.
Return procedure for CY14B256LA-SZ45XI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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