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Infineon Technologies CY14E256L-SZ25XC
- Part No.:
- CY14E256L-SZ25XC
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 32-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
CY14E256L-SZ25XC.pdf
- Description:
- IC NVSRAM 256KBIT PAR 32SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,414
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Product details
Overview
CY14E256L-SZ25XC from Cypress Semiconductor is a 256 Kbit (32K × 8) nonvolatile SRAM with QuantumTrap technology, functioning as drop-in SRAM replacement with integrated nonvolatile storage. It delivers 25 ns access time, operates on single 5V ±10% supply, and uses a 32-pin SOIC package. It performs automatic STORE on power-down using an external 68 µF capacitor at VCAP and supports software/hardware-initiated STORE/RECALL in industrial control and data-logging systems.
For engineers reviewing the CY14E256L-SZ25XC datasheet, CY14E256L-SZ25XC pinout, CY14E256L-SZ25XC application, or CY14E256L-SZ25XC equivalent, key selection criteria include AutoStore timing (tSTORE = 10 ms), HSB-controlled hardware store latency (tDELAY), VCAP charge pump behavior, and compatibility with STK14C88-based legacy designs requiring guaranteed 100-year data retention.
Technical Context
The CY14E256L-SZ25XC 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 (unlimited) from nonvolatile endurance (1,000,000 STOREs), with STORE inhibited unless at least one WRITE occurs since last STORE/RECALL.
AutoStore initiates when VCC drops below VSWITCH (typ. 3.6 V), triggering internal disconnection of VCAP and use of stored charge for 10 ms STORE. Hardware STORE is edge-triggered via open-drain HSB pin with tDELAY delay; software STORE/RECALL use six-address CE-controlled READ sequences without OE dependency.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 256 Kbit (32K × 8) - supports byte-wide interface with full address range A0–A14. |
| Access Time | 25 ns - defines minimum cycle time for reliable SRAM read/write under 5V operation. |
| Nonvolatile Endurance | 1,000,000 STORE cycles - limits total number of data transfers from SRAM to QuantumTrap cells. |
| Data Retention | 100 years - guaranteed nonvolatile data hold time at ≤85°C without refresh. |
| VCAP Capacitor Range | 68 µF to 220 µF (+20%) - required external capacitor for AutoStore energy reserve. |
| Operating Voltage | 5V ±10% - single-supply operation compatible with legacy 5V logic systems. |
| Temperature Range | Industrial: –40°C to +85°C - validated performance across extended thermal environments. |
Pinout & Package
Package: 32-pin Small Outline Integrated Circuit (SOIC), RoHS-compliant, 300-mil body width.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address Input | 15-bit address bus selecting one of 32,768 memory locations. |
| DQ0–DQ7 | Bidirectional Data I/O | 8-bit data path shared for read output and write input; tri-stated when OE HIGH. |
| WE | Write Enable (Active LOW) | Controls write latching; must be stable during CE-controlled write cycle. |
| CE | Chip Enable (Active LOW) | Activates device; used to clock software STORE/RECALL sequences. |
| OE | Output Enable (Active LOW) | Enables data drivers during read; optional for software sequence validity. |
| HSB | Hardware Store Busy | Open-drain status pin indicating active STORE; also initiates hardware STORE when pulled LOW. |
| VCAP | AutoStore Capacitor Supply | Internal charge-pump output; connects to external 68–220 µF capacitor for power-loss STORE. |
| VCC / VSS | Power / Ground | Single 5V supply and reference ground; VCC monitored for AutoStore trigger at VSWITCH. |
Key Features
| Feature | Design Value |
|---|---|
| QuantumTrap Nonvolatile Cell | Embedded per-bit nonvolatile element enabling 100-year data retention without external backup battery. |
| AutoStore on Power Down | Automatic STORE triggered by VCC drop below 3.6 V, using charge from external VCAP capacitor. |
| Three STORE Initiation Modes | Software (6-address CE sequence), Hardware (HSB pin), or AutoStore - provides system-level flexibility in data persistence strategy. |
| Conditional STORE Enforcement | AutoStore and Hardware STORE ignored unless ≥1 WRITE occurred since last STORE/RECALL - prevents unnecessary wear. |
| Unlimited RECALL Cycles | Nonvolatile data can be restored to SRAM any number of times without degrading QuantumTrap cells. |
Applications
| Industrial PLC Data Logging | Medical Device Parameter Storage |
|---|---|
Use Scenario: Capturing real-time sensor readings and operational states in programmable logic controllers during mains power interruption. IC Role / Device Role / Timing Role: Nonvolatile SRAM serving as persistent working memory that retains critical process variables without battery support. Use Value: Eliminates need for supercapacitor/battery backup circuitry while guaranteeing 100-year data retention and surviving >1M power-loss events. | Use Scenario: Storing calibration coefficients, user settings, and fault history in portable diagnostic equipment subject to frequent power cycling. IC Role / Device Role / Timing Role: Pin-compatible SRAM replacement preserving existing PCB layout while adding deterministic nonvolatile recall on power-up. Use Value: Enables immediate restoration of device configuration within tHRECALL (≤15 ms), meeting IEC 62304 boot-time requirements. |
| Avionics Black Box Memory | Point-of-Sale Transaction Buffer |
Use Scenario: Recording flight parameters in aircraft data recorders where extended temperature tolerance and radiation-hardened reliability are mandatory. IC Role / Device Role / Timing Role: High-reliability nvSRAM providing tamper-resistant, write-endurance-managed storage for crash-protected telemetry. Use Value: Supports 1M STORE cycles with verified operation from –40°C to +85°C, satisfying DO-160 environmental test profiles. | Use Scenario: Holding uncommitted sales transactions during brief AC outages in retail terminals before final database commit. IC Role / Device Role / Timing Role: Fail-safe buffer memory ensuring transaction atomicity via hardware STORE triggered by brown-out detection circuit. Use Value: Guarantees zero data loss during <10 ms power dropout using VCAP-supplied STORE, eliminating rollback or reconciliation logic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar nonvolatile SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STK14C88-35I | 35 ns access time; no AutoStore - requires external controller for STORE/RECALL sequencing. | Lacks integrated power-loss detection and VCAP charge pump; needs discrete brown-out circuit and firmware coordination. | Select when legacy board reuse mandates identical pinout but system already implements STORE control logic. |
| FM24V02-G | F-RAM-based; 400 kHz I²C interface; 10¹⁴ read/write endurance; no STORE/RECALL latency. | Serial interface replaces parallel bus; eliminates address/data bus routing but increases protocol overhead. | Select for low-pin-count designs where serial interface suffices and ultra-high write endurance outweighs 25 ns SRAM speed. |
Compared with STK14C88-35I, CY14E256L-SZ25XC reduces system-level STORE control complexity via AutoStore and HSB; compared with FM24V02-G, it preserves parallel bus performance and deterministic STORE timing but trades F-RAM's infinite endurance for QuantumTrap's 1M-cycle limit.
Availability
CY14E256L-SZ25XC is available at Aetrix Electronics and suitable for industrial PLC data logging, medical device parameter storage, and avionics black box memory requiring stable component supply and long-term obsolescence management.
Supply support for CY14E256L-SZ25XC 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 markets.
The CY14E series targets legacy-system upgrades needing battery-free nonvolatile RAM with SRAM pin compatibility and deterministic STORE/RECALL timing for mission-critical data preservation.
FAQ
What is the minimum VCAP capacitance required for reliable AutoStore operation?
The CY14E256L-SZ25XC requires a minimum 68 µF capacitor rated at ≥6V on the VCAP pin to ensure sufficient energy for the 10 ms STORE cycle when VCC drops below VSWITCH (3.6 V). Capacitance below this value risks incomplete STORE and data loss; values up to 220 µF (+20%) are supported for extended hold time margin.
How does the CY14E256L-SZ25XC prevent unintended STORE operations during normal operation?
The device enforces conditional STORE: AutoStore and Hardware STORE are suppressed unless at least one valid WRITE has occurred since the last STORE or RECALL cycle. This prevents unnecessary wear on QuantumTrap cells during idle or read-only operation, extending nonvolatile endurance to its rated 1,000,000 cycles.
Can the HSB pin be left unconnected if not used for hardware STORE initiation?
Yes - the HSB pin has an internal weak pull-up and may be left floating if unused. When driven LOW externally, it initiates STORE after tDELAY; when used as an output, it signals STORE progress via open-drain LOW assertion and requires a 10 kΩ pull-up to VCAP. No external bias is needed for passive monitoring.
Is the CY14E256L-SZ25XC compatible with 3.3V systems?
No - the CY14E256L-SZ25XC is specified only for 5V ±10% operation (4.5V to 5.5V). It lacks 3.3V logic level support, and VCC below 4.5V violates operating range, disabling AutoStore and risking data corruption. For 3.3V systems, consider Infineon's newer nvSRAM families like CY14V101QS.
CY14E256L-SZ25XC 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:
- 25ns
- Access Time:
- 25 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-SOIC
CY14E256L-SZ25XC FAQ
1.How can I place an order for CY14E256L-SZ25XC through Aetrix?
Please submit a Request for Quotation (RFQ) for CY14E256L-SZ25XC 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 CY14E256L-SZ25XC reliable?
The price and inventory of CY14E256L-SZ25XC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY14E256L-SZ25XC is usually 5 days.
3.What payment methods are accepted for CY14E256L-SZ25XC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY14E256L-SZ25XC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY14E256L-SZ25XC?
CY14E256L-SZ25XC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY14E256L-SZ25XC 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 CY14E256L-SZ25XC?
For technical support, including CY14E256L-SZ25XC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY14E256L-SZ25XC requirements.
6.How does Aetrix verify that CY14E256L-SZ25XC is sourced from the original manufacturer or authorized distributors?
All CY14E256L-SZ25XC 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 CY14E256L-SZ25XC meets industry standards.
7.What is the process for return or replacement of CY14E256L-SZ25XC?
All CY14E256L-SZ25XC units undergo pre-shipment inspection (PSI). If there is an issue with CY14E256L-SZ25XC, 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 CY14E256L-SZ25XC part is unused and in its original packaging.
Return procedure for CY14E256L-SZ25XC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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