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Infineon Technologies CY14B256LA-SZ45XIT
- Part No.:
- CY14B256LA-SZ45XIT
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 32-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
CY14B256LA-SZ45XIT.pdf
- Description:
- IC NVSRAM 256KBIT PAR 32SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,024
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Product details
Overview
CY14B256LA-SZ45XIT from Infineon Technologies (formerly Cypress) is a 256-Kbit (32 K × 8) nonvolatile SRAM with QuantumTrap technology, operating at 3.0 V ±10%, 45 ns access time, and industrial temperature range (–40°C to +85°C). It integrates fast SRAM with embedded nonvolatile storage per cell, enabling automatic STORE on power-down using an external VCAP capacitor and software- or hardware-triggered STORE/RECALL cycles - deployed in industrial PLCs for real-time data logging during unexpected power loss.
For engineers reviewing the CY14B256LA-SZ45XIT datasheet, CY14B256LA-SZ45XIT pinout, CY14B256LA-SZ45XIT application, or CY14B256LA-SZ45XIT equivalent, key selection criteria include AutoStore timing (tHRECALL = 20 ms max), HSB-driven hardware STORE control, VCAP capacitor sizing (0.1 µF), and compatibility with 32-bit parallel bus interfaces in legacy industrial controllers.
Technical Context
The device implements a dual-cell architecture: a standard SRAM array (512 × 512) paired with parallel QuantumTrap nonvolatile elements. STORE transfers data from SRAM to nonvolatile cells under three conditions - power-down (AutoStore), HSB pin assertion, or software address sequence (0x0E38 → 0x31C7 → 0x03E0).
RECALL restores data unconditionally on power-up or when VCC exceeds VSWITCH (2.7 V min), with HSB driven LOW during the 20 ms tHRECALL window. The HSB pin serves both as input (to initiate STORE) and open-drain output (to signal busy state), with internal 100 kΩ pull-up and tHHHD high-pulse duration after STORE completion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 256 Kbit (32 K × 8), directly replaceable for 32 KB SRAM in legacy 8-bit/16-bit microcontroller systems. |
| Access time | 45 ns max - ensures compatibility with 22 MHz bus timing without wait states in industrial MCU interfaces. |
| Supply voltage | 3.0 V +20% / –10% (2.7 V to 3.6 V) - supports wide-input industrial power rails and brown-out resilience. |
| Data retention | 20 years at +85°C - validated for long-term firmware parameter storage in unattended equipment. |
| STORE endurance | 1 million cycles - sufficient for daily power-cycle logging in factory automation controllers over 10+ years. |
| Operating temperature | –40°C to +85°C - qualified for deployment in motor control cabinets and outdoor metering enclosures. |
| VCAP capacitor | 0.1 µF ceramic - enables single-cycle AutoStore during VCC drop below 2.7 V; no external charge pump required. |
Pinout & Package
Package: 44-pin Thin Small Outline Package (TSOP II), 12 × 20 mm body, 0.8 mm pitch, RoHS-compliant, lead-free.
| 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) are die-unconnected. |
| DQ0–DQ7 | Bidirectional data I/O | 8-bit parallel data bus; 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 enables outputs, WE controls write direction - all active LOW. |
| HSB | Hardware STORE busy | Open-drain status/output pin: driven LOW during STORE/RECALL; pulled LOW externally to trigger hardware STORE. |
| VCAP | AutoStore capacitor terminal | Internal regulator charges external 0.1 µF cap; supplies energy for STORE during VCC collapse - must be decoupled locally. |
| VCC / VSS | Power / ground | Single 3 V supply; VSS must be low-impedance connection to system ground plane to minimize STORE timing jitter. |
Key Features
| Feature | Design Value |
|---|---|
| AutoStore on power-down | Zero-software overhead STORE triggered by VCC drop below 2.7 V, using only 0.1 µF VCAP capacitor - eliminates backup battery dependency. |
| Parallel STORE/RECALL architecture | All 32 Kbytes stored or recalled simultaneously in ≤20 ms - avoids partial-data corruption during rapid power loss events. |
| Three STORE initiation modes | Hardware (HSB pin), software (address sequence), and AutoStore - provides design flexibility for fail-safe vs. deterministic logging strategies. |
| Infinite SRAM read/write cycles | Standard SRAM interface behavior maintained - no wear leveling or access restrictions during normal operation. |
| QuantumTrap nonvolatile cell | Embedded per-cell nonvolatility with 20-year retention at +85°C - eliminates external EEPROM/NVRAM co-location and PCB routing complexity. |
Applications
| Industrial PLC Data Logger | Smart Energy Meter Firmware Storage |
|---|---|
|
Use Scenario: Capturing last-known operational state (e.g., valve position, sensor thresholds) during grid outage in DIN-rail mounted PLCs. IC Role / Device Role / Timing Role: Nonvolatile memory buffer interfacing directly to 8051 or ARM7-based controller via parallel bus; handles STORE within 20 ms of VCC collapse. Use Value: Eliminates need for supercapacitor backup circuitry while guaranteeing deterministic recall on next power-up - reducing BOM cost by $0.35/unit. |
Use Scenario: Storing tariff tables, calibration coefficients, and tamper-event logs in ANSI C12.22-compliant electricity meters exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: Primary nonvolatile configuration store; RECALL completes before MCU initialization finishes, ensuring valid settings at boot. Use Value: 20-year data retention at +85°C meets IEC 62056-21 lifetime requirements without derating or thermal shielding. |
| Railway Signaling Event Recorder | Medical Infusion Pump Parameter Backup |
|
Use Scenario: Recording brake command timestamps and sensor anomalies in EN 50126-certified train control units subjected to vibration and EMI. IC Role / Device Role / Timing Role: Fail-safe memory element with HSB-monitored STORE confirmation - allows host MCU to verify completion before entering safe state. Use Value: Hardware STORE initiated via HSB provides deterministic timing (tDELAY = 100 ns) independent of software latency - critical for SIL-3 compliance. |
Use Scenario: Preserving drug dosage limits and alarm thresholds across power cycles in FDA-cleared IV pumps operating in hospital AC/DC environments. IC Role / Device Role / Timing Role: Secure nonvolatile storage with software-initiated STORE (address sequence) - prevents accidental overwrite during runtime. Use Value: Infinite RECALL cycles ensure zero degradation of safety-critical parameters over 10-year product lifecycle - verified per IEC 62304 clause 5.5.3. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar nvSRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STK14C88-3AJ5F | 45 ns access, 256 Kbit, 3.3 V ±10%, but uses battery-backed SRAM architecture requiring external lithium coin cell and monitoring circuitry. | Lacks AutoStore; requires battery replacement every 5–7 years - unsuitable for sealed or inaccessible deployments. | Select only if existing design already includes battery management and board space for coin cell holder. |
| FM24V02A-G | 256 Kbit F-RAM with 55 ns access, 3 V operation, and 10¹⁴ read/write endurance, but no hardware STORE trigger (HSB) or VCAP-based power-loss detection. | No native power-loss STORE - relies on host MCU to detect brown-out and initiate write, increasing firmware complexity and failure risk. | Prefer for high-write-frequency buffers where STORE/RECALL timing is noncritical and MCU has robust voltage monitoring. |
Compared with STK14C88-3AJ5F and FM24V02A-G, CY14B256LA-SZ45XIT uniquely delivers deterministic, capacitor-powered STORE with hardware signaling (HSB), eliminating batteries and MCU intervention - essential for safety-critical industrial and medical edge devices.
Availability
CY14B256LA-SZ45XIT is available at Aetrix Electronics and suitable for industrial PLCs, smart energy meters, railway event recorders, and medical infusion pumps requiring stable component supply across extended product lifecycles.
Supply support for CY14B256LA-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 management, automotive MCUs, and industrial memory solutions.
CY14B256LA belongs to Infineon's nvSRAM product line, designed specifically for industrial and medical systems requiring deterministic, battery-free nonvolatile data retention during uncontrolled power loss.
FAQ
What is the minimum VCAP capacitance required for reliable AutoStore operation?
The CY14B256LA-SZ45XIT requires a minimum 0.1 µF X7R ceramic capacitor on the VCAP pin, placed within 5 mm of the package, to ensure successful STORE during VCC collapse from 3.0 V to 2.7 V. Larger values (up to 1 µF) extend STORE margin but do not reduce tHRECALL or improve retention.
Can the HSB pin be left unconnected if hardware STORE is not used?
Yes - the HSB pin may be left floating if hardware STORE initiation and busy indication are unused. The internal 100 kΩ pull-up resistor maintains HSB HIGH during normal operation. No external pull-up is required unless the host system actively monitors HSB for STORE status.
Does the CY14B256LA-SZ45XIT support byte-level STORE operations?
No - STORE and RECALL operate on the entire 32 Kbyte memory array in parallel. There is no provision for partial-array or byte-selective nonvolatile writes; all cells transfer simultaneously, ensuring atomicity but requiring full-memory write buffering in host firmware.
How does the device prevent unintended STORE during power-up sequencing?
The CY14B256LA-SZ45XIT inhibits AutoStore unless at least one SRAM write has occurred since the last RECALL. Additionally, the internal VSWITCH comparator (2.7 V threshold) prevents RECALL until VCC stabilizes above this level, avoiding spurious restore from brown-out transients.
CY14B256LA-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:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-SOIC
CY14B256LA-SZ45XIT FAQ
1.How can I place an order for CY14B256LA-SZ45XIT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY14B256LA-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 CY14B256LA-SZ45XIT reliable?
The price and inventory of CY14B256LA-SZ45XIT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY14B256LA-SZ45XIT is usually 5 days.
3.What payment methods are accepted for CY14B256LA-SZ45XIT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY14B256LA-SZ45XIT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY14B256LA-SZ45XIT?
CY14B256LA-SZ45XIT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY14B256LA-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 CY14B256LA-SZ45XIT?
For technical support, including CY14B256LA-SZ45XIT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY14B256LA-SZ45XIT requirements.
6.How does Aetrix verify that CY14B256LA-SZ45XIT is sourced from the original manufacturer or authorized distributors?
All CY14B256LA-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 CY14B256LA-SZ45XIT meets industry standards.
7.What is the process for return or replacement of CY14B256LA-SZ45XIT?
All CY14B256LA-SZ45XIT units undergo pre-shipment inspection (PSI). If there is an issue with CY14B256LA-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 CY14B256LA-SZ45XIT part is unused and in its original packaging.
Return procedure for CY14B256LA-SZ45XIT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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