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Infineon Technologies CY14E256LA-SZ45XIT
- Part No.:
- CY14E256LA-SZ45XIT
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 32-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
CY14E256LA-SZ45XIT.pdf
- Description:
- IC NVSRAM 256KBIT PAR 32SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,497
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Product details
Overview
CY14E256LA-SZ45XIT from Infineon Technologies (formerly Cypress) is a 256-Kbit (32 K × 8) nonvolatile static RAM with QuantumTrap technology, operating at 5 V ±10%, featuring 45 ns access time, industrial temperature range (–40°C to +85°C), and dual-package support (44-pin TSOP II / 32-pin SOIC). It serves as drop-in SRAM replacement with autonomous power-loss data retention in embedded control and instrumentation systems.
For engineers reviewing the CY14E256LA-SZ45XIT datasheet, CY14E256LA-SZ45XIT pinout, CY14E256LA-SZ45XIT application, or CY14E256LA-SZ45XIT equivalent, key selection criteria include AutoStore capacitor sizing (VCAP), HSB timing for hardware STORE coordination, software STORE/RECALL address sequence validation, and compatibility with legacy SRAM bus interfaces requiring infinite write endurance and 20-year data retention.
Technical Context
The CY14E256LA-SZ45XIT integrates parallel SRAM and QuantumTrap nonvolatile cells per bit, enabling simultaneous STORE/RECALL across all 32,768 bytes. Its architecture decouples volatile read/write cycles (infinite endurance) from nonvolatile STORE operations (1 million cycles max) and RECALL (infinite).
AutoStore triggers on VCC drop below VSWITCH (typ. 3.0 V), using charge stored on external VCAP capacitor (0.1 µF recommended) to complete STORE within tSTORE ≤ 20 ms. Hardware STORE is initiated by driving HSB low; software STORE uses six precise address reads (0x0E38 → 0x0FC0); RECALL occurs automatically on power-up or via software sequence.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 256 Kbit (32 K × 8), directly replaces standard 32-KB SRAM without address decoding changes. |
| Access time | 45 ns max - ensures compatibility with 22 MHz bus timing in microcontroller-based systems. |
| Data retention | 20 years at +85°C - validated for long-life industrial logging and configuration storage. |
| STORE endurance | 1 million cycles - supports frequent power-cycle environments like utility meters and PLCs. |
| Operating voltage | 5.0 V ±10% - matches legacy 5-V logic families without level-shifting. |
| Temperature range | –40°C to +85°C - qualified for uncontrolled industrial enclosures and outdoor edge nodes. |
| VCAP capacitor | 0.1 µF ceramic - provides sufficient energy for single STORE during brownout; no recharge circuit required. |
Pinout & Package
Available in 44-pin TSOP II (Type II, 400 mil) and 32-pin SOIC (300 mil) packages. The -SZ45XIT suffix denotes 44-pin TSOP II, RoHS-compliant, industrial temperature grade.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address input | 15-bit address bus supporting full 32-KB addressing; NC pins (A11, A12, etc.) are unconnected in this density. |
| DQ0–DQ7 | Bidirectional data I/O | 8-bit parallel data path; tri-stated when OE HIGH or during STORE/RECALL to prevent bus contention. |
| CE, OE, WE | Control inputs | Standard SRAM-compatible active-low chip enable, output enable, and write enable; timing aligned to JEDEC SRAM specs. |
| HSB | Hardware STORE Busy | Open-drain status signal: driven LOW during STORE/RECALL; initiates STORE when externally pulled LOW. |
| VCAP | AutoStore capacitor terminal | Internal regulator charges external 0.1 µF cap; powers STORE operation during VCC collapse - no external regulator needed. |
| VCC, VSS | Power supply | Single 5-V supply; VSS must be low-impedance ground return shared with MCU/system logic. |
Key Features
| Feature | Design Value |
|---|---|
| Hands-off AutoStore | Zero-software intervention STORE on power loss - eliminates firmware watchdog or voltage-monitor dependencies. |
| Software STORE/RECALL | 6-address sequence (no special commands or registers) - enables STORE/RECALL from any CPU with standard memory-mapped read capability. |
| Hardware STORE trigger | HSB pin doubles as request input and busy indicator - simplifies external controller coordination without added GPIO or polling. |
| QuantumTrap cell architecture | Parallel STORE/RECALL across all 32 KB - avoids sequential block writes; completes in ≤20 ms regardless of data pattern. |
| SRAM-equivalent interface | No wait states, no command protocols, no initialization - drops into existing 8-bit SRAM socket or PCB layout. |
Applications
| Industrial PLC Data Logging | Metering Configuration Storage |
|---|---|
|
Use Scenario: Retaining real-time energy consumption counters and calibration settings during grid brownouts or scheduled maintenance shutdowns. IC Role / Device Role / Timing Role: Nonvolatile buffer between MCU SRAM and flash - absorbs rapid write bursts while guaranteeing atomic power-loss persistence. Use Value: Eliminates need for wear-leveling firmware and backup battery; achieves 20-year retention without recalibration. |
Use Scenario: Storing tariff tables, billing cycles, and tamper-event timestamps in smart electricity/water meters deployed in remote locations. IC Role / Device Role / Timing Role: Fail-safe configuration register - survives >1M power cycles and operates reliably at –40°C ambient. Use Value: Reduces field failure rate from data corruption by 99.8% vs. EEPROM-based solutions in high-cycling metering applications. |
| Medical Device Parameter Backup | Automotive ECU Calibration Storage |
|
Use Scenario: Preserving therapy parameters (e.g., infusion rate, alarm thresholds) in portable infusion pumps during battery swaps or accidental disconnects. IC Role / Device Role / Timing Role: Volatile/nonvolatile hybrid memory - maintains SRAM-speed access while ensuring life-critical settings survive <100 ms power interruption. Use Value: Meets IEC 62304 Class C software safety requirements for data integrity without external supervision circuitry. |
Use Scenario: Holding adaptive learning values (e.g., idle air control trim, fuel injector latency offsets) in engine control units subjected to repeated ignition cycling. IC Role / Device Role / Timing Role: High-endurance NV memory - endures >500,000 cold-start cycles over 15-year vehicle lifetime. Use Value: Avoids flash reprogramming delays and write-cycle limitations; enables sub-20 ms STORE completion synchronized to ignition-off event. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar nonvolatile SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| FM24V10-G from Cypress/Infineon | 1-Mbit FRAM, 3.3 V only, 55 ns access, no VCAP capacitor required. | Lower power, faster STORE, but incompatible voltage and density; requires PCB redesign and firmware adaptation. | Select if migrating to 3.3-V system and prioritizing ultra-low-power STORE over 5-V legacy compatibility. |
| AS4C32M8SA-7TCN from Alliance Memory | 256-Mbit SDR SDRAM, 3.3 V, requires refresh controller and initialization sequence. | Higher density but volatile-only; lacks inherent nonvolatility - necessitates external backup power or flash co-design. | Choose only when expanding memory capacity is primary goal and nonvolatility can be implemented externally. |
Compared with FM24V10-G and AS4C32M8SA-7TCN, CY14E256LA-SZ45XIT uniquely delivers 5-V SRAM drop-in compatibility, capacitor-based AutoStore, and guaranteed 20-year retention - making it optimal for cost-sensitive, high-reliability industrial upgrades where board space and firmware change are constrained.
Availability
CY14E256LA-SZ45XIT is available at Aetrix Electronics and suitable for industrial PLC data logging, smart metering configuration storage, and medical device parameter backup requiring stable component supply and long-term lifecycle support.
Supply support for CY14E256LA-SZ45XIT 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 is a global semiconductor leader headquartered in Munich, Germany, specializing in power systems, automotive ICs, and memory solutions derived from its 2020 acquisition of Cypress Semiconductor.
CY14E256LA belongs to Infineon's nvSRAM product line, designed specifically to replace battery-backed SRAM in industrial and infrastructure applications where maintenance-free, long-term data retention is mandatory.
FAQ
What is the minimum VCAP capacitor value required for reliable AutoStore operation?
The CY14E256LA-SZ45XIT requires a minimum 0.1 µF X7R ceramic capacitor on the VCAP pin, rated for ≥10 V, placed within 5 mm of the package. This value ensures sufficient energy for one complete STORE cycle (≤20 ms) when VCC drops from 5 V to VSWITCH (3.0 V). Larger capacitors extend margin but do not improve speed or reliability beyond specification.
Can CY14E256LA-SZ45XIT be used as a direct replacement for standard 32-KB SRAM without firmware changes?
Yes - it is pin- and timing-compatible with JEDEC-standard 32-KB × 8 SRAMs (e.g., AS6C4008, IS61LV256AL). All control signals (CE, OE, WE), address/data buses, and DC/AC timing match. AutoStore is disabled by default unless VCAP is populated and VCC collapses; no initialization or driver code is needed for basic SRAM operation.
How does the HSB pin behave during power-up and STORE operations?
During power-up, HSB is initially HIGH (weak internal pull-up), then driven LOW for tHRECALL (≤20 ms) during automatic RECALL. During any STORE (Auto, Hardware, or Software), HSB is actively driven LOW and remains LOW until STORE completes, after which it is driven HIGH for tHHHD (100 ns) before reverting to weak-pull HIGH. It must not be externally pulled LOW during RECALL.
Is the software STORE sequence affected by CPU bus width or endian configuration?
No - the software STORE sequence (0x0E38 → 0x0FC0) relies solely on address bus assertion and CE/OE-controlled reads; data bus content is ignored. It functions identically on 8-bit, 16-bit, or 32-bit microcontrollers, regardless of little/big-endian mode, because only address lines A0–A14 are sampled - DQ lines are read but not interpreted.
CY14E256LA-SZ45XIT 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:
- 45ns
- Access Time:
- 45 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
CY14E256LA-SZ45XIT FAQ
1.How can I place an order for CY14E256LA-SZ45XIT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY14E256LA-SZ45XIT 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 CY14E256LA-SZ45XIT reliable?
The price and inventory of CY14E256LA-SZ45XIT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY14E256LA-SZ45XIT is usually 5 days.
3.What payment methods are accepted for CY14E256LA-SZ45XIT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY14E256LA-SZ45XIT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY14E256LA-SZ45XIT?
CY14E256LA-SZ45XIT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY14E256LA-SZ45XIT 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 CY14E256LA-SZ45XIT?
For technical support, including CY14E256LA-SZ45XIT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY14E256LA-SZ45XIT requirements.
6.How does Aetrix verify that CY14E256LA-SZ45XIT is sourced from the original manufacturer or authorized distributors?
All CY14E256LA-SZ45XIT 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 CY14E256LA-SZ45XIT meets industry standards.
7.What is the process for return or replacement of CY14E256LA-SZ45XIT?
All CY14E256LA-SZ45XIT units undergo pre-shipment inspection (PSI). If there is an issue with CY14E256LA-SZ45XIT, 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 CY14E256LA-SZ45XIT part is unused and in its original packaging.
Return procedure for CY14E256LA-SZ45XIT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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