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Infineon Technologies CY14B256LA-ZS25XI
- Part No.:
- CY14B256LA-ZS25XI
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 44-TSOP (0.400", 10.16mm Width)
- Datasheet:
-
CY14B256LA-ZS25XI.pdf
- Description:
- IC NVSRAM 256KBIT PAR 44TSOP II
- Quantity:
- Payment:
- Shipping:
Inventory:270
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Product details
Overview
CY14B256LA-ZS25XI from Infineon Technologies (formerly Cypress) is a 256-Kbit (32 K × 8) nonvolatile SRAM with QuantumTrap technology, operating at 3.0 V ±10%, offering 25 ns access time and industrial temperature range (–40°C to +85°C). It integrates fast SRAM with embedded nonvolatile storage, enabling automatic STORE on power-down via VCAP capacitor and software- or hardware-triggered STORE/RECALL cycles. Used in industrial PLCs for real-time data logging during unexpected power loss.
For engineers reviewing the CY14B256LA-ZS25XI datasheet, CY14B256LA-ZS25XI pinout, CY14B256LA-ZS25XI application, or CY14B256LA-ZS25XI equivalent, key selection criteria include AutoStore timing (tHRECALL = 15 ms max), HSB-driven hardware STORE control, VCAP capacitor sizing (0.1 µF), and compatibility with 32-bit address/data bus interfaces in legacy industrial controllers.
Technical Context
The CY14B256LA-ZS25XI implements a dual-cell architecture: a standard 32 K × 8 SRAM array paired with parallel QuantumTrap nonvolatile elements per cell. STORE and RECALL occur in full-array parallel mode, eliminating sequential block addressing overhead.
AutoStore activation relies on internal voltage monitoring of VCC against VSWITCH (typ. 2.7 V); when VCC drops below threshold, the device disconnects VCAP from VCC and initiates STORE using stored charge. HSB serves both as input trigger (active-low assertion) and open-drain status output (driven LOW during STORE/RECALL).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 256 Kbit (32 K × 8), directly replaces standard 32 KB SRAM in byte-wide systems without address decoding changes. |
| Access Time | 25 ns (max), supports high-speed MPU interfaces such as ARM9 or ColdFire without wait-state insertion. |
| Supply Voltage | 3.0 V +20% / –10% (2.7 V to 3.6 V), compatible with single-rail 3.3 V systems with marginal dropout tolerance. |
| Data Retention | 20 years at +85°C, validated for long-term archival in unpowered field-deployed equipment. |
| STORE Endurance | 1 million cycles, sufficient for daily power-cycle logging in industrial gateways over 27 years. |
| Operating Temperature | –40°C to +85°C, qualified for use in outdoor automation enclosures without thermal derating. |
| VSWITCH | 2.7 V (typ.), defines precise power-loss detection threshold for deterministic AutoStore initiation. |
Pinout & Package
Package: 44-pin Thin Small Outline Package (TSOP II), 12.0 mm × 20.0 mm body, 0.8 mm pitch, RoHS-compliant, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Input | 15-bit address bus; fully decodes 32,768 locations - no external address latching required. |
| DQ0–DQ7 | I/O | Bidirectional 8-bit data bus; tristated automatically when OE HIGH or during STORE/RECALL. |
| CE, OE, WE | Input | Standard SRAM control signals; CE/OE active LOW for read, CE/WE active LOW for write - matches industry-standard timing. |
| HSB | I/O | Open-drain hardware STORE busy/status pin; driven LOW during STORE/RECALL, accepts external LOW to initiate STORE. |
| VCAP | Power supply | Capacitor connection point for AutoStore energy reserve; requires 0.1 µF X7R ceramic with ≤100 mΩ ESR. |
| VCC, VSS | Power | Single 3 V supply rail and ground; VSS must be low-inductance plane to support fast STORE current pulse (~100 mA peak). |
Key Features
| Feature | Design Value |
|---|---|
| Hands-off AutoStore | Zero-software intervention STORE on power loss - eliminates firmware dependency and watchdog timer design complexity. |
| Parallel full-array STORE/RECALL | All 32 K bytes transferred simultaneously in ≤15 ms - avoids multi-cycle latency of serial EEPROM or flash-based NVRAM. |
| Hardware STORE trigger via HSB | External microcontroller can force immediate nonvolatile save using single GPIO toggle - enables controlled shutdown sequences. |
| Software STORE sequence | Six-address read sequence (0x0E38 → 0x31C7 → 0x03E0) provides secure, accidental-write-resistant STORE activation. |
| QuantumTrap endurance | 1 million STORE cycles with no wear leveling logic - simplifies system-level reliability modeling and qualification testing. |
Applications
| Industrial Data Logger | Medical Device Memory Backup |
|---|---|
|
Use Scenario: Standalone DIN-rail PLC logs sensor readings every 100 ms; power may fail without warning during critical acquisition window. IC Role / Device Role: Primary working memory with instantaneous nonvolatile capture - retains last 10 seconds of raw ADC samples across power cycles. Use Value: Eliminates need for battery-backed SRAM or external EEPROM write sequencing, reducing BOM count and field failure modes. |
Use Scenario: Portable ECG monitor stores waveform buffers and calibration coefficients before automatic shutdown after patient session. IC Role / Device Role: Nonvolatile scratchpad memory - holds timestamped diagnostic data and user-configurable thresholds between sessions. Use Value: Guarantees 20-year data retention at +85°C inside sealed enclosure, meeting IEC 62304 Class C software safety requirements. |
| Telecom Line Card Buffer | Automotive ADAS Event Recorder |
|
Use Scenario: Carrier-grade DSLAM line card caches configuration state and error counters; must survive AC mains interruption during firmware update. IC Role / Device Role: Configuration shadow RAM - mirrors volatile register settings and maintains operational integrity during brownout. Use Value: Achieves <10 µs STORE latency from VCC drop detection, preventing configuration corruption during hot-swap events. |
Use Scenario: Rear-view camera module records 2-second pre-crash video buffer; power cuts instantly upon airbag deployment signal. IC Role / Device Role: Crash-data vault memory - captures last valid frame buffer and CAN bus diagnostics before main power collapse. Use Value: Supports AEC-Q100 Grade 2 qualification with guaranteed operation down to –40°C and rapid STORE under 100 ms VCC decay. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar nonvolatile SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STK14C88-3AJ | 55 ns access time, 3.3 V only, no AutoStore - requires external controller-initiated STORE and backup capacitor circuit. | Lacks hands-off power-loss response; suitable only where MCU has dedicated STORE management firmware. | Select if cost sensitivity outweighs STORE latency and design simplicity requirements. |
| FM24V10-G | F-RAM-based, 40 MHz SPI interface, 1024 Kbit density, unlimited STORE endurance, but serial interface adds latency vs. parallel SRAM bus. | Requires SPI-to-parallel bridge or MCU with dedicated F-RAM driver - incompatible with direct SRAM bus replacement. | Choose when ultra-high STORE cycle count (>1012) is mandatory and bandwidth constraints allow serial access. |
Compared with STK14C88-3AJ and FM24V10-G, CY14B256LA-ZS25XI uniquely delivers parallel SRAM speed, deterministic AutoStore, and drop-in compatibility - making it optimal for legacy 8-bit/16-bit MPU designs requiring zero-firmware nonvolatile persistence.
Availability
CY14B256LA-ZS25XI is available at Aetrix Electronics and suitable for industrial data loggers, medical diagnostic devices, telecom line cards, and automotive ADAS recorders requiring stable component supply and long-term lifecycle support.
Supply support for CY14B256LA-ZS25XI 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, sensing, connectivity, and memory solutions for industrial, automotive, and IoT applications.
CY14B256LA-ZS25XI belongs to Infineon's nvSRAM product line, engineered specifically to replace battery-backed SRAM in mission-critical systems where maintenance-free, long-life, and deterministic nonvolatile storage are essential.
FAQ
What is the minimum VCAP capacitance required for reliable AutoStore operation?
The CY14B256LA-ZS25XI requires a minimum 0.1 µF X7R ceramic capacitor on the VCAP pin, rated for ≥6.3 V, with ESR ≤100 mΩ. This value ensures sufficient energy to complete a full 32 K-byte STORE within tHRECALL (≤15 ms) even at VCC = 2.7 V and TA = +85°C, as verified in Infineon's DC Electrical Characteristics table (Rev. *L, p.8).
Can CY14B256LA-ZS25XI be used as a direct replacement for standard 32 K × 8 SRAMs?
Yes - it is pin-compatible with industry-standard 44-pin TSOP II 32 K × 8 SRAMs (e.g., IS61LV256AL) in read/write operations. However, VCAP must be populated and HSB monitored during STORE/RECALL; unused HSB should be left floating or pulled HIGH via 10 kΩ resistor to avoid spurious triggers.
How does the software STORE sequence prevent accidental activation?
The six-address read sequence (0x0E38 → 0x31C7 → 0x03E0) requires exact order, no intervening accesses, and CE/OE-controlled reads - making unintentional STORE statistically improbable. Any deviation aborts the sequence, and the device returns to normal SRAM operation without side effects.
Is CY14B256LA-ZS25XI qualified for automotive applications?
No - it is specified for industrial temperature range (–40°C to +85°C) and carries no AEC-Q100 qualification. For automotive use, Infineon offers the pin-compatible CY14B101QN-SP variant, which is AEC-Q100 Grade 2 qualified and tested for extended temperature and vibration requirements.
CY14B256LA-ZS25XI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 44-TSOP (0.400", 10.16mm Width)
- Packaging:
- Tray
- Product Status:
- Active
- 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:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 44-TSOP II
CY14B256LA-ZS25XI FAQ
1.How can I place an order for CY14B256LA-ZS25XI through Aetrix?
Please submit a Request for Quotation (RFQ) for CY14B256LA-ZS25XI 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-ZS25XI reliable?
The price and inventory of CY14B256LA-ZS25XI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY14B256LA-ZS25XI is usually 5 days.
3.What payment methods are accepted for CY14B256LA-ZS25XI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY14B256LA-ZS25XI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY14B256LA-ZS25XI?
CY14B256LA-ZS25XI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY14B256LA-ZS25XI 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-ZS25XI?
For technical support, including CY14B256LA-ZS25XI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY14B256LA-ZS25XI requirements.
6.How does Aetrix verify that CY14B256LA-ZS25XI is sourced from the original manufacturer or authorized distributors?
All CY14B256LA-ZS25XI 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-ZS25XI meets industry standards.
7.What is the process for return or replacement of CY14B256LA-ZS25XI?
All CY14B256LA-ZS25XI units undergo pre-shipment inspection (PSI). If there is an issue with CY14B256LA-ZS25XI, 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-ZS25XI part is unused and in its original packaging.
Return procedure for CY14B256LA-ZS25XI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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